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lavf/webm_chunk: Correct duration if start time > 0

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Up until now, it was simply presumed that the first packet had a pts of
zero; otherwise the duration of the first chunk was wrong.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
This commit is contained in:
Andreas Rheinhardt 2019-04-20 00:03:16 +02:00 committed by Paul B Mahol
parent 8c6ee7626b
commit 24a64e0462
1 changed files with 6 additions and 4 deletions
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10
libavformat/webm_chunk.c
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@ -52,7 +52,7 @@ typedef struct WebMChunkContext {
int chunk_index;
char *http_method;
uint64_t duration_written;
int prev_pts;
int64_t prev_pts;
ff_const59 AVOutputFormat *oformat;
AVFormatContext *avf;
} WebMChunkContext;
@ -129,6 +129,7 @@ static int webm_chunk_write_header(AVFormatContext *s)
wc->oformat = av_guess_format("webm", s->url, "video/webm");
if (!wc->oformat)
return AVERROR_MUXER_NOT_FOUND;
wc->prev_pts = AV_NOPTS_VALUE;
ret = chunk_mux_init(s);
if (ret < 0)
@ -216,9 +217,10 @@ static int webm_chunk_write_packet(AVFormatContext *s, AVPacket *pkt)
int ret;
if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
wc->duration_written += av_rescale_q(pkt->pts - wc->prev_pts,
st->time_base,
(AVRational) {1, 1000});
if (wc->prev_pts != AV_NOPTS_VALUE)
wc->duration_written += av_rescale_q(pkt->pts - wc->prev_pts,
st->time_base,
(AVRational) {1, 1000});
wc->prev_pts = pkt->pts;
}