Jun Zhao 6931e21b7e avcodec/hevc_mp4toannexb: avoid duplicating parameter sets when present in-band ...

When an input packet already contains in-band VPS/SPS/PPS parameter sets,
hevc_mp4toannexb still prepended extradata parameter sets before IRAP NALUs,
causing duplicate parameter sets at keyframes.

Avoid duplication by indexing extradata parameter sets in a hash table and
checking in-band parameter sets against it, suppressing any extradata
parameter set whose payload is already present in-band. Declarative SEIs
from extradata are always preserved. Packet-side matching attempts are
bounded to prevent CPU amplification, and redundant linear scans are
pruned with an emitted_types mask. Topological ordering dependencies
(e.g. PPS after SPS, and Prefix SEI barrier before pending parameter sets)
are strictly preserved.

Extradata is parsed in two passes with a single allocation, capping the
total number of NAL units to prevent memory amplification from malformed inputs.

Update the fate-hevc-bsf-mp4toannexb test reference accordingly.

Fixes: ticket #24637
Signed-off-by: Jun Zhao <barryjzhao@tencent.com>

2026-10-04 08:09:26 +08:00

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aac_adtstoasc.c

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ahx_to_mp2.c

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apv_metadata.c

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av1_frame_merge.c

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av1_frame_split.c

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av1_metadata.c

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chomp.c

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dca_core.c

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dovi_rpu.c

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dovi_split.c

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dts2pts.c

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dump_extradata.c

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dv_error_marker.c

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eac3_core.c

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eia608_to_smpte436m.c

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evc_frame_merge.c

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extract_extradata.c

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filter_units.c

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filters.h

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h264_metadata.c

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h264_mp4toannexb.c

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h264_redundant_pps.c

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h265_metadata.c

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h266_metadata.c

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hapqa_extract.c

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hevc_mp4toannexb.c

avcodec/hevc_mp4toannexb: avoid duplicating parameter sets when present in-band

2026-10-04 08:09:26 +08:00

imx_dump_header.c

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lcevc_merge.c

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lcevc_metadata.c

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Makefile

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media100_to_mjpegb.c

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mjpeg2jpeg.c

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mjpega_dump_header.c

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movsub.c

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mpeg2_metadata.c

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mpeg4_unpack_bframes.c

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noise.c

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null.c

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opus_metadata.c

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packetsync.c

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packetsync.h

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pcm_rechunk.c

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pgs_frame_merge.c

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prores_metadata.c

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remove_extradata.c

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setts.c

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showinfo.c

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sink.c

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smpte436m_to_eia608.c

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source.c

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trace_headers.c

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trim.c

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truehd_core.c

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vp9_metadata.c

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vp9_raw_reorder.c

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vp9_superframe_split.c

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vp9_superframe.c

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vvc_mp4toannexb.c

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