Re: [FFmpeg-devel] hev1 vs. hvc1
> > > -Original Message- > From: ffmpeg-devel [mailto:ffmpeg-devel-boun...@ffmpeg.org] On Behalf Of > liyoubdu > Sent: Monday, June 19, 2017 11:20 AM > To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org> > Subject: Re: [FFmpeg-devel] hev1 vs. hvc1 > > >>>>>>>>>>>>>>>>>> > i think mov is mp4 format? That's what I thought as well... but there is a distinction between the two in ffmpeg. A couple of differences I observed between using -f mp4 and -f mov: - ftyp contains different brands (qt vs. isom) - mov has an extra hdlr atom under minf - audio tracks have chan & wave atoms in mov You can see the differences by looking for 'track->mode == MODE_MOV' in movenc.c Thanks, Eran > ___ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] hev1 vs. hvc1
-- Original -- From: "wm4";<nfx...@googlemail.com>; Send time: Monday, Jun 19, 2017 4:11 PM To: "ffmpeg-devel"<ffmpeg-devel@ffmpeg.org>; Subject: Re: [FFmpeg-devel] hev1 vs. hvc1 On Sun, 18 Jun 2017 13:32:42 + Eran Kornblau <eran.kornb...@kaltura.com> wrote: > Hi all, > > We're trying to make ffmpeg output a format tag of 'hvc1' for HEVC, since it > seems that only hvc1 works in iOS 11 beta. > We saw that '-tag:v hvc1' does the trick, but it only works in 'mov' format, > and not in 'mp4' format (we're using mp4 > format for all our videos) > The reason is that ff_codec_movvideo_tags contains hvc1 while ff_mp4_obj_type > does not. > The question is - is this intentional? Would it make sense to submit a patch > to add hvc1 to mp4? > > Also, something that I don't understand - ff_codec_movvideo_tags has 4cc > values for 'tag' while ff_mp4_obj_type > has small integers values, so unless I'm missing something, any attempt to > force a tag in mp4 format will fail. > Can anyone explain why is that? I think there are pending patches on libav-devel. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >>>>>>>>>>>>>>>>>> i think mov is mp4 format? ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
Re: [FFmpeg-devel] hev1 vs. hvc1
On Sun, 18 Jun 2017 13:32:42 + Eran Kornblauwrote: > Hi all, > > We're trying to make ffmpeg output a format tag of 'hvc1' for HEVC, since it > seems that only hvc1 works in iOS 11 beta. > We saw that '-tag:v hvc1' does the trick, but it only works in 'mov' format, > and not in 'mp4' format (we're using mp4 > format for all our videos) > The reason is that ff_codec_movvideo_tags contains hvc1 while ff_mp4_obj_type > does not. > The question is - is this intentional? Would it make sense to submit a patch > to add hvc1 to mp4? > > Also, something that I don't understand - ff_codec_movvideo_tags has 4cc > values for 'tag' while ff_mp4_obj_type > has small integers values, so unless I'm missing something, any attempt to > force a tag in mp4 format will fail. > Can anyone explain why is that? I think there are pending patches on libav-devel. ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel