user setable preload and max_mux_delay
Originally committed as revision 3602 to svn://svn.ffmpeg.org/ffmpeg/trunk
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1f631450fd
commit
17c88cb0ce
12
ffmpeg.c
12
ffmpeg.c
@ -205,6 +205,8 @@ static int audio_codec_tag = 0;
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static int mux_rate= 0;
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static int mux_packet_size= 0;
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static float mux_preload= 0.5;
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static float mux_max_delay= 0.7;
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static int64_t recording_time = 0;
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static int64_t start_time = 0;
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@ -3328,6 +3330,8 @@ static void opt_output_file(const char *filename)
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oc->packet_size= mux_packet_size;
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oc->mux_rate= mux_rate;
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oc->preload= (int)(mux_preload*AV_TIME_BASE);
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oc->max_delay= (int)(mux_max_delay*AV_TIME_BASE);
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/* reset some options */
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file_oformat = NULL;
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@ -3692,6 +3696,12 @@ static void opt_target(const char *arg)
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mux_packet_size= 2324;
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mux_rate= 2352 * 75 * 8;
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/* We have to offset the PTS, so that it is consistent with the SCR.
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SCR starts at 36000, but the first two packs contain only padding
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and the first pack from the other stream, respectively, may also have
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been written before.
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So the real data starts at SCR 36000+3*1200. */
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mux_preload= (36000+3*1200) / 90000.0; //0.44
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} else if(!strcmp(arg, "svcd")) {
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opt_video_codec("mpeg2video");
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@ -3916,6 +3926,8 @@ const OptionDef options[] = {
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/* muxer options */
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{ "muxrate", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&mux_rate}, "set mux rate", "rate" },
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{ "packetsize", OPT_INT | HAS_ARG | OPT_EXPERT, {(void*)&mux_packet_size}, "set packet size", "size" },
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{ "muxdelay", OPT_FLOAT | HAS_ARG | OPT_EXPERT, {(void*)&mux_max_delay}, "set the maximum demux-decode delay", "seconds" },
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{ "muxpreload", OPT_FLOAT | HAS_ARG | OPT_EXPERT, {(void*)&mux_preload}, "set the initial demux-decode delay", "seconds" },
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{ NULL, },
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};
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@ -5,7 +5,7 @@
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extern "C" {
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#endif
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#define LIBAVFORMAT_BUILD 4619
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#define LIBAVFORMAT_BUILD 4620
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#define LIBAVFORMAT_VERSION_INT FFMPEG_VERSION_INT
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#define LIBAVFORMAT_VERSION FFMPEG_VERSION
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@ -310,6 +310,8 @@ typedef struct AVFormatContext {
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int mux_rate;
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int packet_size;
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int preload;
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int max_delay;
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} AVFormatContext;
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typedef struct AVPacketList {
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@ -19,7 +19,6 @@
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#include "avformat.h"
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#define MAX_PAYLOAD_SIZE 4096
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#define PRELOAD 45000 //0.5sec
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//#define DEBUG_SEEK
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#undef NDEBUG
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@ -904,6 +903,7 @@ static int output_packet(AVFormatContext *ctx, int flush){
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int ignore_constraints=0;
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int64_t scr= s->last_scr;
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PacketDesc *timestamp_packet;
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const int64_t max_delay= av_rescale(ctx->max_delay, 90000, AV_TIME_BASE);
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retry:
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for(i=0; i<ctx->nb_streams; i++){
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@ -912,6 +912,7 @@ retry:
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const int avail_data= fifo_size(&stream->fifo, stream->fifo.rptr);
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const int space= stream->max_buffer_size - stream->buffer_index;
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int rel_space= 1024*space / stream->max_buffer_size;
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PacketDesc *next_pkt= stream->premux_packet;
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if(s->packet_size > avail_data && !flush)
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return 0;
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@ -922,6 +923,9 @@ retry:
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if(space < s->packet_size && !ignore_constraints)
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continue;
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if(next_pkt && next_pkt->dts - scr > max_delay)
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continue;
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if(rel_space > best_score){
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best_score= rel_space;
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best_i = i;
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@ -1019,22 +1023,14 @@ static int mpeg_mux_write_packet(AVFormatContext *ctx, AVPacket *pkt)
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StreamInfo *stream = st->priv_data;
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int64_t pts, dts;
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PacketDesc *pkt_desc;
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const int preload= av_rescale(ctx->preload, 90000, AV_TIME_BASE);
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pts= pkt->pts;
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dts= pkt->dts;
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if(s->is_vcd) {
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/* We have to offset the PTS, so that it is consistent with the SCR.
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SCR starts at 36000, but the first two packs contain only padding
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and the first pack from the other stream, respectively, may also have
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been written before.
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So the real data starts at SCR 36000+3*1200. */
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if(pts != AV_NOPTS_VALUE) pts += 36000 + 3600;
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if(dts != AV_NOPTS_VALUE) dts += 36000 + 3600;
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}else{
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if(pts != AV_NOPTS_VALUE) pts += PRELOAD;
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if(dts != AV_NOPTS_VALUE) dts += PRELOAD;
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}
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if(pts != AV_NOPTS_VALUE) pts += preload;
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if(dts != AV_NOPTS_VALUE) dts += preload;
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//av_log(ctx, AV_LOG_DEBUG, "dts:%f pts:%f flags:%d stream:%d nopts:%d\n", dts/90000.0, pts/90000.0, pkt->flags, pkt->stream_index, pts != AV_NOPTS_VALUE);
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*stream->next_packet=
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pkt_desc= av_mallocz(sizeof(PacketDesc));
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@ -7,7 +7,7 @@ ffmpeg regression test
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./data/b-libav.asf CRC=750f18c7
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1cbf838e659d7fc3d3e33f4187b91f6c *./data/b-libav.rm
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360251 ./data/b-libav.rm
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7aeebe6bf43c0c1219e41ce082a47051 *./data/b-libav.mpg
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90784a1b9589095f20fc6bcc0cc23cc4 *./data/b-libav.mpg
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387072 ./data/b-libav.mpg
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./data/b-libav.mpg CRC=16c74225
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57a8dfc7926802bb337a9d8918de94a8 *./data/b-libav.swf
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