diff options
| author | James Almer <jamrial@gmail.com> | 2022-12-04 15:35:58 -0300 |
|---|---|---|
| committer | James Almer <jamrial@gmail.com> | 2022-12-12 18:30:17 -0300 |
| commit | 261cd929e06b716b3bcc944c96fdf94371b3a7ed (patch) | |
| tree | bcfdec43affb29d5a8a171672fa3d261b849ed20 | |
| parent | 69ac78da9befee4a3238721cdb06ceb6fdac6f0a (diff) | |
avcodec/mpeg4videodec: duplicate the last decoded frame when the last coded frame was skipped
This ensures the video stream duration is not lost after decoding.
Signed-off-by: James Almer <jamrial@gmail.com>
| -rw-r--r-- | libavcodec/h263dec.c | 13 | ||||
| -rw-r--r-- | libavcodec/mpegvideo.h | 1 |
2 files changed, 14 insertions, 0 deletions
diff --git a/libavcodec/h263dec.c b/libavcodec/h263dec.c index ac7a8521e5..0a2d7487a8 100644 --- a/libavcodec/h263dec.c +++ b/libavcodec/h263dec.c @@ -431,6 +431,18 @@ int ff_h263_decode_frame(AVCodecContext *avctx, AVFrame *pict, s->next_picture_ptr = NULL; *got_frame = 1; + } else if (s->skipped_last_frame && s->current_picture_ptr) { + /* Output the last picture we decoded again if the stream ended with + * an NVOP */ + if ((ret = av_frame_ref(pict, s->current_picture_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; + s->current_picture_ptr = NULL; + + *got_frame = 1; } return 0; @@ -500,6 +512,7 @@ retry: s->extradata_parsed = 1; } ret = ff_mpeg4_decode_picture_header(avctx->priv_data, &s->gb, 0, 0); + s->skipped_last_frame = (ret == FRAME_SKIPPED); } else if (CONFIG_H263I_DECODER && s->codec_id == AV_CODEC_ID_H263I) { ret = ff_intel_h263_decode_picture_header(s); } else if (CONFIG_FLV_DECODER && s->h263_flv) { diff --git a/libavcodec/mpegvideo.h b/libavcodec/mpegvideo.h index 6440b906b1..42275953b9 100644 --- a/libavcodec/mpegvideo.h +++ b/libavcodec/mpegvideo.h @@ -175,6 +175,7 @@ typedef struct MpegEncContext { Picture *last_picture_ptr; ///< pointer to the previous picture. Picture *next_picture_ptr; ///< pointer to the next picture (for bidir pred) Picture *current_picture_ptr; ///< pointer to the current picture + int skipped_last_frame; int last_dc[3]; ///< last DC values for MPEG-1 int16_t *dc_val_base; int16_t *dc_val[3]; ///< used for MPEG-4 DC prediction, all 3 arrays must be continuous |