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avcodec/av1_metadata_bsf: Check for the existence of units

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Fixes a crash with ISOBMFF extradata containing no OBUs.

Reviewed-by: James Almer <jamrial@gmail.com>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2021-04-02 17:16:39 +02:00
parent b917218c35
commit 8081a0b10f
1 changed files with 1 additions and 1 deletions
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libavcodec/av1_metadata_bsf.c
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@ -120,7 +120,7 @@ static int av1_metadata_update_fragment(AVBSFContext *bsf, AVPacket *pkt,
}
// If a Temporal Delimiter is present, it must be the first OBU.
if (frag->units[0].type == AV1_OBU_TEMPORAL_DELIMITER) {
if (frag->nb_units && frag->units[0].type == AV1_OBU_TEMPORAL_DELIMITER) {
if (ctx->td == BSF_ELEMENT_REMOVE)
ff_cbs_delete_unit(frag, 0);
} else if (pkt && ctx->td == BSF_ELEMENT_INSERT) {