examples/muxing: merge some declarations and definitions
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@ -239,9 +239,7 @@ static AVStream *add_video_stream(AVFormatContext *oc, AVCodec **codec,
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static void open_video(AVFormatContext *oc, AVCodec *codec, AVStream *st)
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{
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int ret;
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AVCodecContext *c;
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c = st->codec;
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AVCodecContext *c = st->codec;
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/* open the codec */
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if (avcodec_open2(c, codec, NULL) < 0) {
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@ -315,10 +313,8 @@ static void fill_yuv_image(AVPicture *pict, int frame_index,
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static void write_video_frame(AVFormatContext *oc, AVStream *st)
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{
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int ret;
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AVCodecContext *c;
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static struct SwsContext *img_convert_ctx;
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c = st->codec;
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AVCodecContext *c = st->codec;
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if (frame_count >= STREAM_NB_FRAMES) {
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/* No more frames to compress. The codec has a latency of a few
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