avformat/avc: fix sps buffer offset when calling ff_avc_decode_sps()

Skip the avcC specific size bytes and the NAL header bits. Signed-off-by: James Almer <jamrial@gmail.com>
5 years ago · 18507b4882
parent 0d67af34c2
commit 18507b4882
1 changed files with 1 additions and 1 deletions
--- a/libavformat/avc.c
+++ b/libavformat/avc.c
@ -197,7 +197,7 @@ int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len)
    avio_write(pb, pps, pps_size);

    if (sps[3] != 66 && sps[3] != 77 && sps[3] != 88) {
-        H264SequenceParameterSet *seq = ff_avc_decode_sps(sps, sps_size);
+        H264SequenceParameterSet *seq = ff_avc_decode_sps(sps + 3, sps_size - 3);
        if (!seq)
            goto fail;
        avio_w8(pb, 0xfc | seq->chroma_format_idc); /* 6 bits reserved (111111) + chroma_format_idc */