Romain Beauxis <to...@rastageeks.org> 于2024年1月1日周一 23:53写道： > > This patch populates the third entry for HLS codec attribute using the > AAC profile. > > The HLS specifications[1] require this value to be the Object Type ID as > referred to in table 1.3 of ISO/IEC 14496-3:2009[2]. > > The numerical constants in the code refer to these OTIs minus one, as > documented in commit 372597e[3], confirmed by comparing the values in the > code with the values in the table mentioned above. > > Links: > 1: https://datatracker.ietf.org/doc/html/rfc6381#section-3.3 > 2: https://csclub.uwaterloo.ca/~ehashman/ISO14496-3-2009.pdf > 3: > https://github.com/FFmpeg/FFmpeg/commit/372597e5381c097455a7b73849254d56083eb056 > > Changes in this version: > - Default value set to "mp4a.40.2" when profile is unknown for backward > compatibility. > > --- > libavformat/hlsenc.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/libavformat/hlsenc.c b/libavformat/hlsenc.c > index 7049956dd7..55123d2297 100644 > --- a/libavformat/hlsenc.c > +++ b/libavformat/hlsenc.c > @@ -418,8 +418,11 @@ static void write_codec_attr(AVStream *st, VariantStream > *vs) > } else if (st->codecpar->codec_id == AV_CODEC_ID_MP3) { > snprintf(attr, sizeof(attr), "mp4a.40.34"); > } else if (st->codecpar->codec_id == AV_CODEC_ID_AAC) { > - /* TODO : For HE-AAC, HE-AACv2, the last digit needs to be set to 5 > and 29 respectively */ > - snprintf(attr, sizeof(attr), "mp4a.40.2"); > + if (st->codecpar->profile != AV_PROFILE_UNKNOWN) > + snprintf(attr, sizeof(attr), "mp4a.40.%d", > st->codecpar->profile+1); > + else > + // This is for backward compatibility with the previous > implementation. > + snprintf(attr, sizeof(attr), "mp4a.40.2"); > } else if (st->codecpar->codec_id == AV_CODEC_ID_AC3) { > snprintf(attr, sizeof(attr), "ac-3"); > } else if (st->codecpar->codec_id == AV_CODEC_ID_EAC3) { > -- > 2.39.3 (Apple Git-145) > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
LGTM, will apply after 24 hours if there have no objections. Thanks Steven _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
