Commit 85e33747 authored by Michael Niedermayer's avatar Michael Niedermayer

mpeg1 overflowing dc coeff fix

Originally committed as revision 2674 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent af547ce5
......@@ -197,11 +197,16 @@ AVStream *add_video_stream(AVFormatContext *oc, int codec_id)
c->frame_rate = STREAM_FRAME_RATE;
c->frame_rate_base = 1;
c->gop_size = 12; /* emit one intra frame every twelve frames at most */
if (c->codec_id == CODEC_ID_MPEG1VIDEO ||
c->codec_id == CODEC_ID_MPEG2VIDEO) {
if (c->codec_id == CODEC_ID_MPEG2VIDEO) {
/* just for testing, we also add B frames */
c->max_b_frames = 2;
}
if (c->codec_id == CODEC_ID_MPEG1VIDEO){
/* needed to avoid using macroblocks in which some coeffs overflow
this doesnt happen with normal video, it just happens here as the
motion of the chroma plane doesnt match the luma plane */
c->mb_decision=2;
}
// some formats want stream headers to be seperate
if(!strcmp(oc->oformat->name, "mp4") || !strcmp(oc->oformat->name, "mov") || !strcmp(oc->oformat->name, "3gp"))
c->flags |= CODEC_FLAG_GLOBAL_HEADER;
......
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