[FFmpeg-devel] [PATCH] avcodec/h264_parser: set missing pts for top/bottom field frames
Paul B Mahol
onemda at gmail.com
Wed Sep 14 17:42:59 EEST 2016
Adopted from 4eb49fdde8f84d54a763cfb5d355527b525ee2bf revert.
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
libavcodec/h264_parser.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/libavcodec/h264_parser.c b/libavcodec/h264_parser.c
index 615884f..cf6c3d1 100644
--- a/libavcodec/h264_parser.c
+++ b/libavcodec/h264_parser.c
@@ -60,6 +60,7 @@ typedef struct H264ParseContext {
uint8_t parse_history[6];
int parse_history_count;
int parse_last_mb;
+ int64_t reference_dts;
} H264ParseContext;
@@ -598,6 +599,26 @@ static int h264_parse(AVCodecParserContext *s,
s->flags &= PARSER_FLAG_COMPLETE_FRAMES;
}
+ if (s->dts_sync_point >= 0) {
+ int64_t den = avctx->time_base.den * avctx->pkt_timebase.num;
+ if (den > 0) {
+ int64_t num = avctx->time_base.num * avctx->pkt_timebase.den;
+ if (s->dts != AV_NOPTS_VALUE) {
+ // got DTS from the stream, update reference timestamp
+ p->reference_dts = s->dts - s->dts_ref_dts_delta * num / den;
+ } else if (p->reference_dts != AV_NOPTS_VALUE) {
+ // compute DTS based on reference timestamp
+ s->dts = p->reference_dts + s->dts_ref_dts_delta * num / den;
+ }
+
+ if (p->reference_dts != AV_NOPTS_VALUE && s->pts == AV_NOPTS_VALUE)
+ s->pts = s->dts + s->pts_dts_delta * num / den;
+
+ if (s->dts_sync_point > 0)
+ p->reference_dts = s->dts; // new reference
+ }
+ }
+
*poutbuf = buf;
*poutbuf_size = buf_size;
return next;
@@ -655,6 +676,7 @@ static av_cold int init(AVCodecParserContext *s)
{
H264ParseContext *p = s->priv_data;
+ p->reference_dts = AV_NOPTS_VALUE;
ff_h264dsp_init(&p->h264dsp, 8, 1);
return 0;
}
--
2.5.0
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