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lavf/mov: document the dvh1 codec switch based on hvcC availability

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This commit is contained in:
Jan Ekström 2018-12-03 03:15:29 +02:00
parent 6ebe88f3a4
commit a1f0dd24f6
1 changed files with 5 additions and 0 deletions
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5
libavformat/mov.c
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@ -1907,6 +1907,11 @@ static int mov_read_glbl(MOVContext *c, AVIOContext *pb, MOVAtom atom)
if (ret < 0) if (ret < 0)
return ret; return ret;
if (atom.type == MKTAG('h','v','c','C') && st->codecpar->codec_tag == MKTAG('d','v','h','1')) if (atom.type == MKTAG('h','v','c','C') && st->codecpar->codec_tag == MKTAG('d','v','h','1'))
/* HEVC-based Dolby Vision derived from hvc1.
Happens to match with an identifier
previously utilized for DV. Thus, if we have
the hvcC extradata box available as specified,
set codec to HEVC */
st->codecpar->codec_id = AV_CODEC_ID_HEVC; st->codecpar->codec_id = AV_CODEC_ID_HEVC;
return 0; return 0;