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use correct field number for video according to specs, patch by Thierry Foucu, tfoucu at gmail dot com 

Originally committed as revision 17214 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Thierry Foucu 2009-02-13 21:36:36 +00:00 committed by Baptiste Coudurier
parent 032d8aece2
commit 2ead1eb0ff
1 changed files with 11 additions and 3 deletions
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14
libavformat/gxfenc.c
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@ -728,11 +728,19 @@ static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int si
static int gxf_write_media_preamble(ByteIOContext *pb, GXFContext *ctx, AVPacket *pkt, int size)
{
GXFStreamContext *sc = ctx->fc->streams[pkt->stream_index]->priv_data;
int64_t dts = av_rescale_rnd(pkt->dts, ctx->sample_rate, sc->codec->time_base.den, AV_ROUND_UP);
unsigned field_nb;
/* If the video is frame-encoded, the frame numbers shall be represented by
* even field numbers.
* see SMPTE360M-2004 6.4.2.1.3 Media field number */
if (sc->codec->codec_type == CODEC_TYPE_VIDEO) {
field_nb = ctx->nb_fields;
} else {
field_nb = av_rescale_rnd(pkt->dts, ctx->sample_rate, sc->codec->time_base.den, AV_ROUND_UP);
}
put_byte(pb, sc->media_type);
put_byte(pb, sc->index);
put_be32(pb, dts);
put_be32(pb, field_nb);
if (sc->codec->codec_type == CODEC_TYPE_AUDIO) {
put_be16(pb, 0);
put_be16(pb, size / 2);
@ -754,7 +762,7 @@ static int gxf_write_media_preamble(ByteIOContext *pb, GXFContext *ctx, AVPacket
put_be24(pb, 0);
} else
put_be32(pb, size);
put_be32(pb, dts);
put_be32(pb, field_nb);
put_byte(pb, 1); /* flags */
put_byte(pb, 0); /* reserved */
return 16;