Hi On Mon, Oct 18, 2021 at 12:15:11PM +0000, Brad Hards wrote: > ffmpeg | branch: master | Brad Hards <br...@frogmouth.net> | Fri Aug 6 > 19:16:33 2021 +1000| [7c08cad280a16b346c0a5e0efdfd8333ec54f095] | committer: > Derek Buitenhuis > > libavcodec/libx264: add user data unregistered SEI encoding > > MISB ST 0604 and ST 2101 require user data unregistered SEI messages > (precision timestamps and sensor identifiers) to be included. That > currently isn't supported for libx264. This patch adds support > for user data unregistered SEI messages in accordance with ISO/IEC > 14496-10:2020(E) section D.1.7 (syntax) and D.2.7 (semantics). > > This code is based on a similar change for libx265 (commit > 1f58503013720700a5adfd72c708e6275aefc165). > > Signed-off-by: Derek Buitenhuis <derek.buitenh...@gmail.com> > > > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=7c08cad280a16b346c0a5e0efdfd8333ec54f095 > ---
This code breaks bitexact mode for some files, i have not looked into this any deeper yet. example: ./ffmpeg -i tickets/5356/framestep_fails.mov -map 0:v:0 -filter:v "framestep=step=2" -codec:v libx264 -t 0.1 -an -bitexact -y file5414.mp4 && md5sum file5414.mp4 59441c644fc3d269ef6689f1c450abda file5414.mp4 62740d54583fd475efd808a638730c1e file5414.mp4 #extradata 0: 49, 0xb4861385 #software: Lavf59.6.100 #tb 0: 1/15000 #media_type 0: video #codec_id 0: h264 #dimensions 0: 1920x1080 #sar 0: 0/1 0, 0, 0, 1001, 1879, 0x2fd508ad 0, 1001, 1001, 1001, 13178, 0xfe8c5a6b, F=0x0 #extradata 0: 49, 0xb4861385 #software: Lavf59.6.100 #tb 0: 1/15000 #media_type 0: video #codec_id 0: h264 #dimensions 0: 1920x1080 #sar 0: 0/1 0, 0, 0, 1001, 1879, 0x67fb0880 0, 1001, 1001, 1001, 13178, 0xf33a5a3e, F=0x0 #extradata 0: 49, 0xb4861385 #software: Lavf59.6.100 #tb 0: 1/15000 #media_type 0: video #codec_id 0: h264 #dimensions 0: 1920x1080 #sar 0: 0/1 0, 0, 0, 1001, 1879, 0xb39a0891 0, 1001, 1001, 1001, 13178, 0x5e155a4f, F=0x0 Heres another examples: ./ffmpeg -i tickets/4012/IMG_4596.MOV -movflags +faststart -pix_fmt yuv420p -c:v libx264 -c:a aac -bitexact -t 0.5 -vprofile baseline -acodec aac -y test.mov && md5sum test.mov the link to the sample file is on: https://trac.ffmpeg.org/ticket/4012 [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB Into a blind darkness they enter who follow after the Ignorance, they as if into a greater darkness enter who devote themselves to the Knowledge alone. -- Isha Upanishad
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