[FFmpeg-devel] [PATCH 6/6] lavf: count skipped samples for initial timestamps.

[Michael Niedermayer]

On Sun, Jul 15, 2012 at 05:53:06PM +0200, Nicolas George wrote:
> If skip_samples is set and timestamps are synthesized using durations,
> make them start at -skip_samples (rescaled) instead of 0,
> so that the timestamp of the first undiscarded sample is 0.
> 
> Signed-off-by: Nicolas George <nicolas.george at normalesup.org>
> ---
>  libavformat/utils.c |    4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/libavformat/utils.c b/libavformat/utils.c
> index ae3a39a..98273ef 100644
> --- a/libavformat/utils.c
> +++ b/libavformat/utils.c
> @@ -942,6 +942,10 @@ static void update_initial_durations(AVFormatContext *s, AVStream *st,
>      AVPacketList *pktl= s->parse_queue ? s->parse_queue : s->packet_buffer;
>      int64_t cur_dts= RELATIVE_TS_BASE;
>  
> +    if (st->skip_samples && st->codec->sample_rate && st->time_base.num)
> +        cur_dts -= av_rescale_q(st->skip_samples,
> +                                (AVRational){ 1, st->codec->sample_rate },
> +                                st->time_base);

does this affect stream copy ?
i mean when stream copying something with skiped samples the
underlaying packet timestamps have to stay as they are


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Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

There will always be a question for which you do not know the correct awnser.
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