2003-07-22 14:46:15 +02:00
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/*
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* Copyright (c) 2003 Fabrice Bellard
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2005-12-17 19:14:38 +01:00
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*
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2003-07-22 14:46:15 +02:00
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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2005-12-17 19:14:38 +01:00
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*
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2003-07-22 14:46:15 +02:00
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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2005-12-17 19:14:38 +01:00
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*
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2003-07-22 14:46:15 +02:00
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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2005-12-17 19:14:38 +01:00
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* THE SOFTWARE.
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2003-07-22 14:46:15 +02:00
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*/
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2011-05-30 09:12:48 +02:00
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/**
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* @file
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2011-06-30 21:06:25 +02:00
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* libavformat API example.
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*
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* Output a media file in any supported libavformat format.
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* The default codecs are used.
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2011-05-30 09:12:48 +02:00
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*/
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2003-07-22 14:46:15 +02:00
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#include <stdlib.h>
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#include <stdio.h>
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2004-01-06 22:03:41 +01:00
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#include <string.h>
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2003-07-22 14:46:15 +02:00
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#include <math.h>
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2012-05-12 17:26:01 +02:00
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#include <libavutil/mathematics.h>
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#include <libavformat/avformat.h>
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#include <libswscale/swscale.h>
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2003-07-22 14:46:15 +02:00
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/* 5 seconds stream duration */
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2011-10-02 23:05:07 +02:00
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#define STREAM_DURATION 200.0
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2003-09-11 01:09:30 +02:00
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#define STREAM_FRAME_RATE 25 /* 25 images/s */
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#define STREAM_NB_FRAMES ((int)(STREAM_DURATION * STREAM_FRAME_RATE))
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2012-10-06 12:10:34 +02:00
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#define STREAM_PIX_FMT AV_PIX_FMT_YUV420P /* default pix_fmt */
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2003-07-22 14:46:15 +02:00
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2006-08-03 18:55:36 +02:00
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static int sws_flags = SWS_BICUBIC;
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2003-07-22 14:46:15 +02:00
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/**************************************************************/
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/* audio output */
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2011-09-21 18:44:41 +02:00
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static float t, tincr, tincr2;
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static int16_t *samples;
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static int audio_input_frame_size;
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2003-07-22 14:46:15 +02:00
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2005-12-17 19:14:38 +01:00
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/*
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2003-07-22 14:46:15 +02:00
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* add an audio output stream
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*/
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2012-08-03 17:57:45 +02:00
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static AVStream *add_audio_stream(AVFormatContext *oc, AVCodec **codec,
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2012-08-07 22:45:46 +02:00
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enum AVCodecID codec_id)
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2003-07-22 14:46:15 +02:00
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{
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AVCodecContext *c;
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AVStream *st;
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2012-01-28 20:12:45 +01:00
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/* find the audio encoder */
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2012-08-03 17:57:45 +02:00
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*codec = avcodec_find_encoder(codec_id);
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if (!(*codec)) {
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2012-09-11 18:23:58 +02:00
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fprintf(stderr, "Could not find codec\n");
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2012-01-28 20:12:45 +01:00
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exit(1);
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}
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2003-07-22 14:46:15 +02:00
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2012-08-03 17:57:45 +02:00
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st = avformat_new_stream(oc, *codec);
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2003-07-22 14:46:15 +02:00
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if (!st) {
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2012-09-11 18:23:58 +02:00
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fprintf(stderr, "Could not allocate stream\n");
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2003-07-22 14:46:15 +02:00
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exit(1);
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}
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2011-11-05 13:11:18 +01:00
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st->id = 1;
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2003-07-22 14:46:15 +02:00
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2005-07-18 00:24:36 +02:00
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c = st->codec;
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2003-07-22 14:46:15 +02:00
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/* put sample parameters */
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2012-03-30 02:27:05 +02:00
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c->sample_fmt = AV_SAMPLE_FMT_S16;
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c->bit_rate = 64000;
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2003-07-22 14:46:15 +02:00
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c->sample_rate = 44100;
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2012-03-30 02:27:05 +02:00
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c->channels = 2;
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2010-01-21 18:10:13 +01:00
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// some formats want stream headers to be separate
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2011-07-27 02:04:53 +02:00
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if (oc->oformat->flags & AVFMT_GLOBALHEADER)
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2010-01-21 18:10:13 +01:00
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c->flags |= CODEC_FLAG_GLOBAL_HEADER;
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2003-07-22 16:41:49 +02:00
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return st;
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}
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2012-08-03 17:57:45 +02:00
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static void open_audio(AVFormatContext *oc, AVCodec *codec, AVStream *st)
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2003-07-22 16:41:49 +02:00
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{
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AVCodecContext *c;
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2005-07-18 00:24:36 +02:00
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c = st->codec;
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2003-07-22 16:41:49 +02:00
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2003-07-22 14:46:15 +02:00
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/* open it */
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2012-08-03 17:57:45 +02:00
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if (avcodec_open2(c, codec, NULL) < 0) {
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2012-10-15 15:20:35 +02:00
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fprintf(stderr, "Could not open codec\n");
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2003-07-22 14:46:15 +02:00
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exit(1);
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}
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/* init signal generator */
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2012-03-30 02:27:05 +02:00
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t = 0;
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2003-07-22 16:41:49 +02:00
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tincr = 2 * M_PI * 110.0 / c->sample_rate;
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/* increment frequency by 110 Hz per second */
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tincr2 = 2 * M_PI * 110.0 / c->sample_rate / c->sample_rate;
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2003-07-22 14:46:15 +02:00
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2012-02-24 08:59:38 +01:00
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if (c->codec->capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE)
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audio_input_frame_size = 10000;
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else
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2003-07-22 14:46:15 +02:00
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audio_input_frame_size = c->frame_size;
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2012-03-30 02:27:05 +02:00
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samples = av_malloc(audio_input_frame_size *
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av_get_bytes_per_sample(c->sample_fmt) *
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c->channels);
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2012-10-15 15:33:58 +02:00
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if (!samples) {
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fprintf(stderr, "Could not allocate audio samples buffer\n");
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exit(1);
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}
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2003-07-22 14:46:15 +02:00
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}
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2012-03-30 02:27:05 +02:00
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/* Prepare a 16 bit dummy audio frame of 'frame_size' samples and
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* 'nb_channels' channels. */
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2006-01-31 00:33:19 +01:00
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static void get_audio_frame(int16_t *samples, int frame_size, int nb_channels)
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2003-08-08 20:03:31 +02:00
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{
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int j, i, v;
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int16_t *q;
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q = samples;
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2011-07-27 02:04:53 +02:00
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for (j = 0; j < frame_size; j++) {
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2003-08-08 20:03:31 +02:00
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v = (int)(sin(t) * 10000);
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2012-03-30 02:27:05 +02:00
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for (i = 0; i < nb_channels; i++)
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2003-08-08 20:03:31 +02:00
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*q++ = v;
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2012-03-30 02:27:05 +02:00
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t += tincr;
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2003-08-08 20:03:31 +02:00
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tincr += tincr2;
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}
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}
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2006-01-31 00:33:19 +01:00
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static void write_audio_frame(AVFormatContext *oc, AVStream *st)
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2003-07-22 14:46:15 +02:00
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{
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AVCodecContext *c;
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2012-03-29 21:00:37 +02:00
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AVPacket pkt = { 0 }; // data and size must be 0;
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2012-02-24 08:59:38 +01:00
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AVFrame *frame = avcodec_alloc_frame();
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2012-10-15 15:33:58 +02:00
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int got_packet, ret;
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2005-12-17 19:14:38 +01:00
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2012-02-24 08:59:38 +01:00
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av_init_packet(&pkt);
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2005-07-18 00:24:36 +02:00
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c = st->codec;
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2003-07-22 14:46:15 +02:00
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2003-08-08 20:03:31 +02:00
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get_audio_frame(samples, audio_input_frame_size, c->channels);
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2012-02-24 08:59:38 +01:00
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frame->nb_samples = audio_input_frame_size;
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2012-03-30 02:27:05 +02:00
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avcodec_fill_audio_frame(frame, c->channels, c->sample_fmt,
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(uint8_t *)samples,
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audio_input_frame_size *
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av_get_bytes_per_sample(c->sample_fmt) *
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c->channels, 1);
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2003-08-08 20:03:31 +02:00
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2012-10-15 15:33:58 +02:00
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ret = avcodec_encode_audio2(c, &pkt, frame, &got_packet);
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if (ret < 0) {
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fprintf(stderr, "Error encoding audio frame\n");
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exit(1);
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}
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2012-02-24 08:59:38 +01:00
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if (!got_packet)
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return;
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2004-05-29 04:06:32 +02:00
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2012-03-30 02:27:05 +02:00
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pkt.stream_index = st->index;
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2003-07-22 14:46:15 +02:00
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2012-03-30 02:27:05 +02:00
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/* Write the compressed frame to the media file. */
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2009-02-18 12:46:14 +01:00
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if (av_interleaved_write_frame(oc, &pkt) != 0) {
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2003-07-22 14:46:15 +02:00
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fprintf(stderr, "Error while writing audio frame\n");
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exit(1);
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}
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2012-09-21 09:10:23 +02:00
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avcodec_free_frame(&frame);
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2003-07-22 14:46:15 +02:00
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}
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2006-01-31 00:33:19 +01:00
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static void close_audio(AVFormatContext *oc, AVStream *st)
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2003-07-22 16:41:49 +02:00
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{
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2005-07-18 00:24:36 +02:00
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avcodec_close(st->codec);
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2005-12-17 19:14:38 +01:00
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2003-07-22 16:41:49 +02:00
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av_free(samples);
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}
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2003-07-22 14:46:15 +02:00
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/**************************************************************/
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/* video output */
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2012-09-11 18:13:20 +02:00
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static AVFrame *frame;
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static AVPicture src_picture, dst_picture;
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2011-09-21 18:44:41 +02:00
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static uint8_t *video_outbuf;
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static int frame_count, video_outbuf_size;
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2003-07-22 14:46:15 +02:00
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2012-03-30 02:27:05 +02:00
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/* Add a video output stream. */
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2012-08-03 17:57:45 +02:00
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static AVStream *add_video_stream(AVFormatContext *oc, AVCodec **codec,
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2012-08-07 22:45:46 +02:00
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enum AVCodecID codec_id)
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2003-07-22 14:46:15 +02:00
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{
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AVCodecContext *c;
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AVStream *st;
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2012-01-28 20:12:45 +01:00
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/* find the video encoder */
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2012-08-03 17:57:45 +02:00
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*codec = avcodec_find_encoder(codec_id);
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if (!(*codec)) {
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2012-01-28 20:12:45 +01:00
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fprintf(stderr, "codec not found\n");
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exit(1);
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}
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2003-07-22 14:46:15 +02:00
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2012-08-03 17:57:45 +02:00
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st = avformat_new_stream(oc, *codec);
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2003-07-22 14:46:15 +02:00
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if (!st) {
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fprintf(stderr, "Could not alloc stream\n");
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exit(1);
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}
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2005-12-17 19:14:38 +01:00
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2005-07-18 00:24:36 +02:00
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c = st->codec;
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2011-12-02 22:49:00 +01:00
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2012-08-03 17:57:45 +02:00
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avcodec_get_context_defaults3(c, *codec);
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2011-12-02 22:49:00 +01:00
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2003-07-22 16:41:49 +02:00
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c->codec_id = codec_id;
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2003-07-22 14:46:15 +02:00
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2012-03-30 02:27:05 +02:00
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/* Put sample parameters. */
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2003-07-22 14:46:15 +02:00
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c->bit_rate = 400000;
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2012-03-30 02:27:05 +02:00
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/* Resolution must be a multiple of two. */
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c->width = 352;
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c->height = 288;
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/* timebase: This is the fundamental unit of time (in seconds) in terms
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* of which frame timestamps are represented. For fixed-fps content,
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* timebase should be 1/framerate and timestamp increments should be
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* identical to 1. */
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2005-12-17 19:14:38 +01:00
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c->time_base.den = STREAM_FRAME_RATE;
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2005-04-30 23:43:59 +02:00
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c->time_base.num = 1;
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2012-03-30 02:27:05 +02:00
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c->gop_size = 12; /* emit one intra frame every twelve frames at most */
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c->pix_fmt = STREAM_PIX_FMT;
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2012-08-05 11:11:04 +02:00
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if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
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2003-09-11 01:09:30 +02:00
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/* just for testing, we also add B frames */
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c->max_b_frames = 2;
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}
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2012-08-05 11:11:04 +02:00
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if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
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2007-06-12 11:29:25 +02:00
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/* Needed to avoid using macroblocks in which some coeffs overflow.
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2012-03-30 02:27:05 +02:00
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* This does not happen with normal video, it just happens here as
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* the motion of the chroma plane does not match the luma plane. */
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c->mb_decision = 2;
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2004-01-06 22:16:59 +01:00
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}
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2012-03-30 02:27:05 +02:00
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/* Some formats want stream headers to be separate. */
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2011-07-27 02:04:53 +02:00
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if (oc->oformat->flags & AVFMT_GLOBALHEADER)
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2004-01-06 22:03:41 +01:00
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c->flags |= CODEC_FLAG_GLOBAL_HEADER;
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2005-12-17 19:14:38 +01:00
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2003-07-22 16:41:49 +02:00
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return st;
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}
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2012-08-03 17:57:45 +02:00
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static void open_video(AVFormatContext *oc, AVCodec *codec, AVStream *st)
|
2003-07-22 16:41:49 +02:00
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{
|
2012-09-11 18:13:20 +02:00
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int ret;
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2012-09-11 18:20:20 +02:00
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AVCodecContext *c = st->codec;
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2003-07-22 16:41:49 +02:00
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/* open the codec */
|
2012-08-03 17:57:45 +02:00
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if (avcodec_open2(c, codec, NULL) < 0) {
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2012-09-11 18:23:58 +02:00
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|
fprintf(stderr, "Could not open codec\n");
|
2003-07-22 14:46:15 +02:00
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exit(1);
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}
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2003-07-22 16:41:49 +02:00
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video_outbuf = NULL;
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|
if (!(oc->oformat->flags & AVFMT_RAWPICTURE)) {
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2012-03-30 02:27:05 +02:00
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/* Allocate output buffer. */
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/* XXX: API change will be done. */
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/* Buffers passed into lav* can be allocated any way you prefer,
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* as long as they're aligned enough for the architecture, and
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* they're freed appropriately (such as using av_free for buffers
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|
|
* allocated with av_malloc). */
|
2003-07-22 16:41:49 +02:00
|
|
|
video_outbuf_size = 200000;
|
2012-03-30 02:27:05 +02:00
|
|
|
video_outbuf = av_malloc(video_outbuf_size);
|
2003-07-22 16:41:49 +02:00
|
|
|
}
|
2003-07-22 14:46:15 +02:00
|
|
|
|
2012-09-11 18:13:20 +02:00
|
|
|
/* allocate and init a re-usable frame */
|
|
|
|
frame = avcodec_alloc_frame();
|
|
|
|
if (!frame) {
|
|
|
|
fprintf(stderr, "Could not allocate video frame\n");
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Allocate the encoded raw picture. */
|
2012-09-11 18:13:20 +02:00
|
|
|
ret = avpicture_alloc(&dst_picture, c->pix_fmt, c->width, c->height);
|
|
|
|
if (ret < 0) {
|
2003-07-22 16:41:49 +02:00
|
|
|
fprintf(stderr, "Could not allocate picture\n");
|
|
|
|
exit(1);
|
|
|
|
}
|
2003-07-22 14:46:15 +02:00
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* If the output format is not YUV420P, then a temporary YUV420P
|
|
|
|
* picture is needed too. It is then converted to the required
|
|
|
|
* output format. */
|
2012-10-06 12:10:34 +02:00
|
|
|
if (c->pix_fmt != AV_PIX_FMT_YUV420P) {
|
2012-10-08 20:54:00 +02:00
|
|
|
ret = avpicture_alloc(&src_picture, AV_PIX_FMT_YUV420P, c->width, c->height);
|
2012-09-11 18:13:20 +02:00
|
|
|
if (ret < 0) {
|
2003-07-22 16:41:49 +02:00
|
|
|
fprintf(stderr, "Could not allocate temporary picture\n");
|
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
}
|
2012-09-11 18:13:20 +02:00
|
|
|
|
|
|
|
/* copy data and linesize picture pointers to frame */
|
|
|
|
*((AVPicture *)frame) = dst_picture;
|
2003-07-22 16:41:49 +02:00
|
|
|
}
|
2003-07-22 14:46:15 +02:00
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Prepare a dummy image. */
|
2012-09-11 18:13:20 +02:00
|
|
|
static void fill_yuv_image(AVPicture *pict, int frame_index,
|
2012-03-30 02:27:05 +02:00
|
|
|
int width, int height)
|
2003-07-22 14:46:15 +02:00
|
|
|
{
|
2003-07-22 16:41:49 +02:00
|
|
|
int x, y, i;
|
|
|
|
|
|
|
|
i = frame_index;
|
2003-07-22 14:46:15 +02:00
|
|
|
|
|
|
|
/* Y */
|
2012-03-30 02:27:05 +02:00
|
|
|
for (y = 0; y < height; y++)
|
|
|
|
for (x = 0; x < width; x++)
|
2003-07-22 16:41:49 +02:00
|
|
|
pict->data[0][y * pict->linesize[0] + x] = x + y + i * 3;
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2003-07-22 14:46:15 +02:00
|
|
|
/* Cb and Cr */
|
2012-03-30 02:27:05 +02:00
|
|
|
for (y = 0; y < height / 2; y++) {
|
|
|
|
for (x = 0; x < width / 2; x++) {
|
2003-07-22 16:41:49 +02:00
|
|
|
pict->data[1][y * pict->linesize[1] + x] = 128 + y + i * 2;
|
|
|
|
pict->data[2][y * pict->linesize[2] + x] = 64 + x + i * 5;
|
2003-07-22 14:46:15 +02:00
|
|
|
}
|
|
|
|
}
|
2003-07-22 16:41:49 +02:00
|
|
|
}
|
2003-07-22 14:46:15 +02:00
|
|
|
|
2006-01-31 00:33:19 +01:00
|
|
|
static void write_video_frame(AVFormatContext *oc, AVStream *st)
|
2003-07-22 16:41:49 +02:00
|
|
|
{
|
2012-08-21 18:13:14 +02:00
|
|
|
int ret;
|
2012-09-11 18:21:59 +02:00
|
|
|
static struct SwsContext *sws_ctx;
|
2012-09-11 18:20:20 +02:00
|
|
|
AVCodecContext *c = st->codec;
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2003-09-11 01:09:30 +02:00
|
|
|
if (frame_count >= STREAM_NB_FRAMES) {
|
2012-03-30 02:27:05 +02:00
|
|
|
/* No more frames to compress. The codec has a latency of a few
|
|
|
|
* frames if using B-frames, so we get the last frames by
|
|
|
|
* passing the same picture again. */
|
2003-07-22 16:41:49 +02:00
|
|
|
} else {
|
2012-10-06 12:10:34 +02:00
|
|
|
if (c->pix_fmt != AV_PIX_FMT_YUV420P) {
|
2003-09-11 01:09:30 +02:00
|
|
|
/* as we only generate a YUV420P picture, we must convert it
|
2012-03-30 02:27:05 +02:00
|
|
|
* to the codec pixel format if needed */
|
2012-09-11 18:21:59 +02:00
|
|
|
if (!sws_ctx) {
|
2012-10-08 20:54:00 +02:00
|
|
|
sws_ctx = sws_getContext(c->width, c->height, AV_PIX_FMT_YUV420P,
|
2012-09-11 18:21:59 +02:00
|
|
|
c->width, c->height, c->pix_fmt,
|
|
|
|
sws_flags, NULL, NULL, NULL);
|
|
|
|
if (!sws_ctx) {
|
2012-03-30 02:27:05 +02:00
|
|
|
fprintf(stderr,
|
2012-09-11 18:23:58 +02:00
|
|
|
"Could not initialize the conversion context\n");
|
2006-08-03 18:55:36 +02:00
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
}
|
2012-09-11 18:13:20 +02:00
|
|
|
fill_yuv_image(&src_picture, frame_count, c->width, c->height);
|
2012-09-11 18:21:59 +02:00
|
|
|
sws_scale(sws_ctx,
|
2012-09-11 18:13:20 +02:00
|
|
|
(const uint8_t * const *)src_picture.data, src_picture.linesize,
|
|
|
|
0, c->height, dst_picture.data, dst_picture.linesize);
|
2003-09-11 01:09:30 +02:00
|
|
|
} else {
|
2012-09-11 18:13:20 +02:00
|
|
|
fill_yuv_image(&dst_picture, frame_count, c->width, c->height);
|
2003-09-11 01:09:30 +02:00
|
|
|
}
|
2003-07-22 16:41:49 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (oc->oformat->flags & AVFMT_RAWPICTURE) {
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Raw video case - the API will change slightly in the near
|
|
|
|
* future for that. */
|
2004-05-29 04:06:32 +02:00
|
|
|
AVPacket pkt;
|
|
|
|
av_init_packet(&pkt);
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
pkt.flags |= AV_PKT_FLAG_KEY;
|
|
|
|
pkt.stream_index = st->index;
|
2012-09-11 18:13:20 +02:00
|
|
|
pkt.data = dst_picture.data[0];
|
2012-03-30 02:27:05 +02:00
|
|
|
pkt.size = sizeof(AVPicture);
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2009-02-18 12:46:14 +01:00
|
|
|
ret = av_interleaved_write_frame(oc, &pkt);
|
2003-07-22 16:41:49 +02:00
|
|
|
} else {
|
|
|
|
/* encode the image */
|
2012-08-21 18:13:14 +02:00
|
|
|
AVPacket pkt;
|
|
|
|
int got_output;
|
|
|
|
|
|
|
|
av_init_packet(&pkt);
|
|
|
|
pkt.data = NULL; // packet data will be allocated by the encoder
|
|
|
|
pkt.size = 0;
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2012-09-11 18:13:20 +02:00
|
|
|
ret = avcodec_encode_video2(c, &pkt, frame, &got_output);
|
2012-08-21 18:13:14 +02:00
|
|
|
if (ret < 0) {
|
2012-09-11 18:23:58 +02:00
|
|
|
fprintf(stderr, "Error encoding video frame\n");
|
2012-08-21 18:13:14 +02:00
|
|
|
exit(1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* If size is zero, it means the image was buffered. */
|
|
|
|
if (got_output) {
|
2008-07-23 12:56:56 +02:00
|
|
|
if (c->coded_frame->pts != AV_NOPTS_VALUE)
|
2012-03-30 02:27:05 +02:00
|
|
|
pkt.pts = av_rescale_q(c->coded_frame->pts,
|
|
|
|
c->time_base, st->time_base);
|
|
|
|
if (c->coded_frame->key_frame)
|
2010-03-31 14:29:58 +02:00
|
|
|
pkt.flags |= AV_PKT_FLAG_KEY;
|
2012-03-30 22:10:17 +02:00
|
|
|
|
2011-07-27 02:04:53 +02:00
|
|
|
pkt.stream_index = st->index;
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Write the compressed frame to the media file. */
|
2009-02-18 12:46:14 +01:00
|
|
|
ret = av_interleaved_write_frame(oc, &pkt);
|
2003-09-11 01:09:30 +02:00
|
|
|
} else {
|
|
|
|
ret = 0;
|
|
|
|
}
|
2003-07-22 16:41:49 +02:00
|
|
|
}
|
|
|
|
if (ret != 0) {
|
2003-07-22 14:46:15 +02:00
|
|
|
fprintf(stderr, "Error while writing video frame\n");
|
|
|
|
exit(1);
|
|
|
|
}
|
2003-07-22 16:41:49 +02:00
|
|
|
frame_count++;
|
|
|
|
}
|
|
|
|
|
2006-01-31 00:33:19 +01:00
|
|
|
static void close_video(AVFormatContext *oc, AVStream *st)
|
2003-07-22 16:41:49 +02:00
|
|
|
{
|
2005-07-18 00:24:36 +02:00
|
|
|
avcodec_close(st->codec);
|
2012-09-11 18:13:20 +02:00
|
|
|
av_free(src_picture.data[0]);
|
|
|
|
av_free(dst_picture.data[0]);
|
|
|
|
av_free(frame);
|
2003-07-22 16:41:49 +02:00
|
|
|
av_free(video_outbuf);
|
2003-07-22 14:46:15 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/**************************************************************/
|
|
|
|
/* media file output */
|
|
|
|
|
|
|
|
int main(int argc, char **argv)
|
|
|
|
{
|
|
|
|
const char *filename;
|
|
|
|
AVOutputFormat *fmt;
|
|
|
|
AVFormatContext *oc;
|
2003-07-22 16:41:49 +02:00
|
|
|
AVStream *audio_st, *video_st;
|
2012-08-03 17:57:45 +02:00
|
|
|
AVCodec *audio_codec, *video_codec;
|
2003-07-22 14:46:15 +02:00
|
|
|
double audio_pts, video_pts;
|
2003-07-22 16:41:49 +02:00
|
|
|
int i;
|
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Initialize libavcodec, and register all codecs and formats. */
|
2003-07-22 14:46:15 +02:00
|
|
|
av_register_all();
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2003-07-22 14:46:15 +02:00
|
|
|
if (argc != 2) {
|
|
|
|
printf("usage: %s output_file\n"
|
2003-07-22 16:41:49 +02:00
|
|
|
"API example program to output a media file with libavformat.\n"
|
|
|
|
"The output format is automatically guessed according to the file extension.\n"
|
|
|
|
"Raw images can also be output by using '%%d' in the filename\n"
|
2003-07-22 14:46:15 +02:00
|
|
|
"\n", argv[0]);
|
2011-09-21 18:46:56 +02:00
|
|
|
return 1;
|
2003-07-22 14:46:15 +02:00
|
|
|
}
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2003-07-22 14:46:15 +02:00
|
|
|
filename = argv[1];
|
|
|
|
|
2011-04-30 20:44:09 +02:00
|
|
|
/* allocate the output media context */
|
2011-05-19 22:09:34 +02:00
|
|
|
avformat_alloc_output_context2(&oc, NULL, NULL, filename);
|
2011-04-30 20:44:09 +02:00
|
|
|
if (!oc) {
|
2003-07-22 14:46:15 +02:00
|
|
|
printf("Could not deduce output format from file extension: using MPEG.\n");
|
2011-05-19 22:09:34 +02:00
|
|
|
avformat_alloc_output_context2(&oc, NULL, "mpeg", filename);
|
2003-07-22 14:46:15 +02:00
|
|
|
}
|
|
|
|
if (!oc) {
|
2011-09-21 18:46:56 +02:00
|
|
|
return 1;
|
2003-07-22 14:46:15 +02:00
|
|
|
}
|
2011-07-27 02:04:53 +02:00
|
|
|
fmt = oc->oformat;
|
2003-07-22 14:46:15 +02:00
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Add the audio and video streams using the default format codecs
|
|
|
|
* and initialize the codecs. */
|
2003-07-22 14:46:15 +02:00
|
|
|
video_st = NULL;
|
|
|
|
audio_st = NULL;
|
2012-08-05 11:11:04 +02:00
|
|
|
if (fmt->video_codec != AV_CODEC_ID_NONE) {
|
2012-08-03 17:57:45 +02:00
|
|
|
video_st = add_video_stream(oc, &video_codec, fmt->video_codec);
|
2003-07-22 14:46:15 +02:00
|
|
|
}
|
2012-08-05 11:11:04 +02:00
|
|
|
if (fmt->audio_codec != AV_CODEC_ID_NONE) {
|
2012-08-03 17:57:45 +02:00
|
|
|
audio_st = add_audio_stream(oc, &audio_codec, fmt->audio_codec);
|
2003-07-22 14:46:15 +02:00
|
|
|
}
|
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Now that all the parameters are set, we can open the audio and
|
|
|
|
* video codecs and allocate the necessary encode buffers. */
|
2003-07-22 16:41:49 +02:00
|
|
|
if (video_st)
|
2012-08-03 17:57:45 +02:00
|
|
|
open_video(oc, video_codec, video_st);
|
2003-07-22 16:41:49 +02:00
|
|
|
if (audio_st)
|
2012-08-03 17:57:45 +02:00
|
|
|
open_audio(oc, audio_codec, audio_st);
|
2003-07-22 16:41:49 +02:00
|
|
|
|
2012-03-30 00:28:00 +02:00
|
|
|
av_dump_format(oc, 0, filename, 1);
|
|
|
|
|
2003-07-22 14:46:15 +02:00
|
|
|
/* open the output file, if needed */
|
|
|
|
if (!(fmt->flags & AVFMT_NOFILE)) {
|
2011-04-15 16:42:09 +02:00
|
|
|
if (avio_open(&oc->pb, filename, AVIO_FLAG_WRITE) < 0) {
|
2003-07-22 14:46:15 +02:00
|
|
|
fprintf(stderr, "Could not open '%s'\n", filename);
|
2011-09-21 18:46:56 +02:00
|
|
|
return 1;
|
2003-07-22 14:46:15 +02:00
|
|
|
}
|
|
|
|
}
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Write the stream header, if any. */
|
2012-09-11 18:25:58 +02:00
|
|
|
if (avformat_write_header(oc, NULL) < 0) {
|
|
|
|
fprintf(stderr, "Error occurred when opening output file\n");
|
|
|
|
return 1;
|
|
|
|
}
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2012-09-11 18:13:20 +02:00
|
|
|
frame->pts = 0;
|
2012-03-30 02:27:05 +02:00
|
|
|
for (;;) {
|
|
|
|
/* Compute current audio and video time. */
|
2003-07-22 14:46:15 +02:00
|
|
|
if (audio_st)
|
2004-05-22 14:21:58 +02:00
|
|
|
audio_pts = (double)audio_st->pts.val * audio_st->time_base.num / audio_st->time_base.den;
|
2003-07-22 14:46:15 +02:00
|
|
|
else
|
|
|
|
audio_pts = 0.0;
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2003-07-22 14:46:15 +02:00
|
|
|
if (video_st)
|
2012-03-30 02:27:05 +02:00
|
|
|
video_pts = (double)video_st->pts.val * video_st->time_base.num /
|
|
|
|
video_st->time_base.den;
|
2003-07-22 14:46:15 +02:00
|
|
|
else
|
|
|
|
video_pts = 0.0;
|
|
|
|
|
2005-12-17 19:14:38 +01:00
|
|
|
if ((!audio_st || audio_pts >= STREAM_DURATION) &&
|
2003-07-22 14:46:15 +02:00
|
|
|
(!video_st || video_pts >= STREAM_DURATION))
|
|
|
|
break;
|
2005-12-17 19:14:38 +01:00
|
|
|
|
2003-07-22 14:46:15 +02:00
|
|
|
/* write interleaved audio and video frames */
|
2003-07-22 16:41:49 +02:00
|
|
|
if (!video_st || (video_st && audio_st && audio_pts < video_pts)) {
|
2003-07-22 14:46:15 +02:00
|
|
|
write_audio_frame(oc, audio_st);
|
|
|
|
} else {
|
|
|
|
write_video_frame(oc, video_st);
|
2012-09-11 18:13:20 +02:00
|
|
|
frame->pts++;
|
2003-07-22 14:46:15 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Write the trailer, if any. The trailer must be written before you
|
|
|
|
* close the CodecContexts open when you wrote the header; otherwise
|
|
|
|
* av_write_trailer() may try to use memory that was freed on
|
|
|
|
* av_codec_close(). */
|
2009-02-18 07:49:32 +01:00
|
|
|
av_write_trailer(oc);
|
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Close each codec. */
|
2003-07-22 16:41:49 +02:00
|
|
|
if (video_st)
|
|
|
|
close_video(oc, video_st);
|
|
|
|
if (audio_st)
|
|
|
|
close_audio(oc, audio_st);
|
2003-07-22 14:46:15 +02:00
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
/* Free the streams. */
|
|
|
|
for (i = 0; i < oc->nb_streams; i++) {
|
2006-02-06 13:45:52 +01:00
|
|
|
av_freep(&oc->streams[i]->codec);
|
2003-07-22 16:41:49 +02:00
|
|
|
av_freep(&oc->streams[i]);
|
|
|
|
}
|
|
|
|
|
2012-03-30 02:27:05 +02:00
|
|
|
if (!(fmt->flags & AVFMT_NOFILE))
|
|
|
|
/* Close the output file. */
|
2011-02-21 22:45:20 +01:00
|
|
|
avio_close(oc->pb);
|
2003-07-22 14:46:15 +02:00
|
|
|
|
|
|
|
/* free the stream */
|
|
|
|
av_free(oc);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|