[FFmpeg-devel] [PATCH 1/1] Sega FILM: set dts and duration when demuxing

[Kyle Swanson]

Hi,

On Sun, Apr 8, 2018 at 6:27 PM, <misty at brew.sh> wrote:

> From: Misty De Meo <mistydemeo at gmail.com>
>
> ---
>  libavformat/segafilm.c | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
>
> diff --git a/libavformat/segafilm.c b/libavformat/segafilm.c
> index 4c0cca0140..e72c26b144 100644
> --- a/libavformat/segafilm.c
> +++ b/libavformat/segafilm.c
> @@ -270,6 +270,8 @@ static int film_read_packet(AVFormatContext *s,
>      FilmDemuxContext *film = s->priv_data;
>      AVIOContext *pb = s->pb;
>      film_sample *sample;
> +    film_sample *next_sample = NULL;
> +    int next_sample_id;
>      int ret = 0;
>
>      if (film->current_sample >= film->sample_count)
> @@ -277,6 +279,20 @@ static int film_read_packet(AVFormatContext *s,
>
>      sample = &film->sample_table[film->current_sample];
>
> +    /* Find the next sample from the same stream, assuming there is one;
> +     * this is used to calculate the duration below */
> +    next_sample_id = film->current_sample + 1;
> +    while (next_sample == NULL) {
> +        if (next_sample_id >= film->sample_count)
> +            break;
> +
> +        next_sample = &film->sample_table[next_sample_id];
> +        if (next_sample->stream != sample->stream) {
> +            next_sample = NULL;
> +            next_sample_id++;
> +        }
> +    }
> +
>      /* position the stream (will probably be there anyway) */
>      avio_seek(pb, sample->sample_offset, SEEK_SET);
>
> @@ -285,8 +301,11 @@ static int film_read_packet(AVFormatContext *s,
>          ret = AVERROR(EIO);
>
>      pkt->stream_index = sample->stream;
> +    pkt->dts = sample->pts;
>      pkt->pts = sample->pts;
>      pkt->flags |= sample->keyframe ? AV_PKT_FLAG_KEY : 0;
> +    if (next_sample != NULL)
> +        pkt->duration = next_sample->pts - sample->pts;
>
>      film->current_sample++;
>
> --
> 2.17.0
>
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>

lgtm