In 14496-15 2019 5.4.1"AVC file type and identification" and 8.4"HEVC video stream definition" , I think the Entry Box types 'hvc1' 'hev1',could be considered as brands of HEVC. I just think AVC uses its Entry as major brand, maybe it works same to HEVC.
Regards, SunZhenliang ________________________________ 发件人: ffmpeg-devel <ffmpeg-devel-boun...@ffmpeg.org> 代表 Jan Ekström <jee...@gmail.com> 发送时间: 2020年12月12日 01:12 收件人: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org> 主题: Re: [FFmpeg-devel] 回复: [PATCH, v4] libavformat/movenc: Add support for HEVC in .3gp On Fri, Dec 11, 2020 at 3:27 PM Sun Zhenliang <hisunzhenli...@outlook.com> wrote: > > I think there two files: 3GPP TS 26.244 V16.1.0 (2020-09) > and ISO/IEC 14496-15 2019: "Information technology – Coding > of audio-visual objects – Part 15: Carriage of NAL unit structured > video in the ISO base media file format" states the major brands of HEVC. > > > https://www.etsi.org/deliver/etsi_ts/126200_126299/126244/16.01.00_60/ts_126244v160100p.pdf > > Regards, > SunZhenliang > Yes, I have now found a January, 2019 draft of 14496-15 and its area around the HEVC bits is (mostly) the same. In other words, while I can find the reference towards AVC file format's brands, I cannot find such for HEVC. Also if you look at the MP4 registration authority, they actually don't have hev1 or hvc1 as registered brands. Can you please point towards the chapter number in 14496-15 where the HEVC brands are defined? Jan _______________________________________________ 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". _______________________________________________ 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".
