Re: [FFmpeg-devel] [PATCH] libavcodec/h264_refs.c: respect ref_frame_count when adding short term refs after a frame num gap

[Scott Theisen <scott.the.elm@gmail.com>]

On 11/13/24 23:59, Scott Theisen wrote:
> From: Janne Grunau <jgrunau@mythtv.org>
>
> this silences the "number of reference frames exceeds max
> (probably corrupt input), discarding one" message
> in the uninteresting cases, i.e. after seeking, playback start
>
> originally from:
> https://github.com/MythTV/mythtv/commit/53257097eb6c1fd4259d20bc92f8820a023ec953
>
> referencing:
> https://code.mythtv.org/trac/ticket/6729
> https://code.mythtv.org/trac/ticket/8367
> ---
>   libavcodec/h264_refs.c | 6 ++++++
>   1 file changed, 6 insertions(+)
>
> diff --git a/libavcodec/h264_refs.c b/libavcodec/h264_refs.c
> index 5eb2855065..63ad617268 100644
> --- a/libavcodec/h264_refs.c
> +++ b/libavcodec/h264_refs.c
> @@ -759,6 +759,12 @@ int ff_h264_execute_ref_pic_marking(H264Context *h)
>               h->short_ref[0] = h->cur_pic_ptr;
>               h->short_ref_count++;
>               h->cur_pic_ptr->reference |= h->picture_structure;
> +
> +            // do not add more reference frames than allowed after seeing frame num gap
> +            if (!mmco_count && h->short_ref_count > h->ps.sps->ref_frame_count) {
> +                pic = h->short_ref[h->short_ref_count - 1];
> +                remove_short(h, pic->frame_num, 0);
> +            }
>           }
>       }
>   

Ping?  Rebased onto master cleanly.
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