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avcodec/h263dec: Always output next, not current pic when flushing

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It is the last picture in display order.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt
2025-05-01 21:51:07 +02:00
parent 2d4d7df10c
commit c37fb99abb
1 changed files with 10 additions and 13 deletions
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23
libavcodec/h263dec.c
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@ -426,22 +426,19 @@ int ff_h263_decode_frame(AVCodecContext *avctx, AVFrame *pict,
/* no supplementary picture */
if (buf_size == 0) {
/* special case for last picture */
if (s->low_delay == 0 && s->next_pic.ptr) {
if ((!s->low_delay || s->skipped_last_frame) && s->next_pic.ptr) {
if ((ret = av_frame_ref(pict, s->next_pic.ptr->f)) < 0)
return ret;
ff_mpv_unref_picture(&s->next_pic);
if (s->skipped_last_frame) {
/* If the stream ended with an NVOP, we output the last frame
* in display order, but with the props from the last input
* packet so that the stream's end time is correct. */
ret = ff_decode_frame_props(avctx, pict);
if (ret < 0)
return ret;
}
*got_frame = 1;
} else if (s->skipped_last_frame && s->cur_pic.ptr) {
/* Output the last picture we decoded again if the stream ended with
* an NVOP */
if ((ret = av_frame_ref(pict, s->cur_pic.ptr->f)) < 0)
return ret;
/* Copy props from the last input packet. Otherwise, props from the last
* returned picture would be reused */
if ((ret = ff_decode_frame_props(avctx, pict)) < 0)
return ret;
ff_mpv_unref_picture(&s->cur_pic);
ff_mpv_unref_picture(&s->next_pic);
*got_frame = 1;
}