[Ffmpeg-devel-irc] ffmpeg-devel.log.20180802

burek burek021 at gmail.com
Fri Aug 3 03:05:03 EEST 2018

[18:53:18 CEST] <durandal_1707> found out some silly imm5 dll responsible for cctv fotage have old ffmpeg bits in it
[22:07:43 CEST] <durandal_1707> whats going on?
[22:08:18 CEST] <jamrial> with what?
[22:09:24 CEST] <durandal_1707> with CoC
[22:11:57 CEST] <j-b> jamrial: good!
[22:12:17 CEST] <durandal_1707> whats good?
[22:13:22 CEST] <j-b> mkv/av1
[22:15:42 CEST] <atomnuker> yeah, there's been less comments on the cellar list about av1 in mkv
[22:16:14 CEST] <atomnuker> and no commits to the av1 matroska branch in 2 weeks
[22:16:48 CEST] <durandal_1707> so it is not complete?
[22:17:38 CEST] <j-b> it's blocked by the MP4 spec.
[22:17:50 CEST] <j-b> because they want to make the MKV spec the most similar to Mp4
[22:18:12 CEST] <jamrial> BBB, atomnuker: there's a discussion going on about av1C/CodecPrivate still
[22:18:15 CEST] <atomnuker> I thought it was just jamrial's issues left
[22:18:20 CEST] <jamrial> it may change, or it may not
[22:18:24 CEST] <j-b> https://github.com/AOMediaCodec/av1-isobmff/issues/50 et al.
[22:19:06 CEST] <jamrial> err, sorry BBB for pinging you, meant j-b
[22:19:13 CEST] <BBB> right
[22:19:20 CEST] <BBB> I would not know anything about this
[22:19:28 CEST] <BBB> I know transforms and stuff
[22:19:31 CEST] <BBB> is that useful?
[22:19:38 CEST] <BBB> :-p
[22:19:47 CEST] <jamrial> but yeah, it's up to date now, and if there's any change i'll just make the necessary changes
[22:21:22 CEST] <jamrial> BBB: yes if you want to actually get something on a screen and not just do remuxing roundtrips, obviously :p
[22:22:36 CEST] <durandal_1707> anybody want  to tell something to me?
[22:24:06 CEST] <atomnuker> durandal_1707: is it hot down there in croatia?
[22:26:43 CEST] <durandal_1707> atomnuker: it is colder than in Paris for sure
[22:29:09 CEST] <atomnuker> give paris time to cool down, vdd's in september
[22:29:33 CEST] <atomnuker> not that there's anyone in paris atm, its a ghost town
[22:29:46 CEST] <durandal_1707> then it is most humid
[22:37:27 CEST] <durandal_1707> how many different idct are possible with video codecs?
[22:41:36 CEST] <atomnuker> if not bitexact, millions, the spec says what the error of a "correct" one should be within
[22:44:00 CEST] <atomnuker> if bitexact, still a lot, but less since whatever your input is as long as its within valid ranges you need to keep accuracy
[22:44:21 CEST] <kierank> durandal_1707: there is a michaelni blog post about it
[22:45:07 CEST] <durandal_1707> really? between various hitech stuff?
[22:46:12 CEST] <durandal_1707> codecs tend to invent own stuff every single time
[22:49:02 CEST] <atomnuker> no, some lossy intra-only codecs use the IEEE 8x8 JPEG transforms and it sucked
[22:57:50 CEST] <durandal_1707> read blog, its really complicated, i will need to RE simd
[22:58:30 CEST] <durandal_1707> code as written for bink2 newer variants
[22:59:06 CEST] <durandal_1707> and there is imm4...
[00:00:00 CEST] --- Fri Aug  3 2018

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