[FFmpeg-devel] [PATCH] avformat/gifdec: cleanup
James Almer
jamrial at gmail.com
Mon May 22 19:07:50 EEST 2023
On 5/22/2023 12:49 PM, Paul B Mahol wrote:
> On 5/21/23, Paul B Mahol <onemda at gmail.com> wrote:
>> Attached patches.
>>
>> This finally removes giant hacks in gif demuxer and allows using gif
>> files via pipe reliably.
>>
>
> Now with smaller diff.
[...]
> From f3d6eea43df686b4211601b194fac81f032eb273 Mon Sep 17 00:00:00 2001
> From: Paul B Mahol <onemda at gmail.com>
> Date: Sun, 21 May 2023 02:15:26 +0200
> Subject: [PATCH 1/2] avformat/demux: add support to derive timestamps from
> packet durations for video
>
> Signed-off-by: Paul B Mahol <onemda at gmail.com>
> ---
> libavformat/demux.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/libavformat/demux.c b/libavformat/demux.c
> index dec02a1a6b..b3f563ccc7 100644
> --- a/libavformat/demux.c
> +++ b/libavformat/demux.c
> @@ -1195,6 +1195,11 @@ static int parse_packet(AVFormatContext *s, AVPacket *pkt,
> st->time_base,
> AV_ROUND_DOWN);
> }
> + } else if ((s->iformat->flags & AVFMT_NOTIMESTAMPS) && st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
Why only for AVFMT_NOTIMESTAMPS formats? Same as the audio check above,
the parser could set duration regardless of where the packet came from.
> + if (st->time_base.num > 0 && st->time_base.den > 0 &&
> + sti->parser->duration) {
> + out_pkt->duration = sti->parser->duration;
> + }
> }
>
> out_pkt->stream_index = st->index;
> --
> 2.39.1
>
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