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yuv4mpegenc: do not access AVCodecContext.coded_frame 

Its contents are meaningful only if the stream codec context is the one
actually used for encoding, which is often not the case (and is
discouraged).

Use AVCodecContext.field_order instead.
This commit is contained in:
Anton Khirnov 2014-07-05 06:44:00 +00:00
parent 27c1f82f56
commit 650d384048
1 changed files with 5 additions and 3 deletions
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8
libavformat/yuv4mpegenc.c
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@ -48,9 +48,11 @@ static int yuv4_generate_header(AVFormatContext *s, char* buf)
if (aspectn == 0 && aspectd == 1)
aspectd = 0; // 0:0 means unknown
inter = 'p'; /* progressive is the default */
if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame)
inter = st->codec->coded_frame->top_field_first ? 't' : 'b';
switch (st->codec->field_order) {
case AV_FIELD_TT: inter = 't'; break;
case AV_FIELD_BB: inter = 'b'; break;
default: inter = 'p'; break;
}
switch (st->codec->pix_fmt) {
case AV_PIX_FMT_GRAY8: