[Ffmpeg-devel-irc] ffmpeg-devel.log.20160817

[burek]

[00:02:13 CEST] <durandal_1707> I was watching someone other day claiming more than 50%
[00:05:22 CEST] <michaelni> depends on content
[00:07:44 CEST] <durandal_1707> I know, but for the content you tried?
[00:19:58 CEST] <michaelni> for vsynth_lena-ffv1 it compresses better than 50%
[00:21:12 CEST] <durandal_1707> tried something bigger?
[00:21:47 CEST] <jamrial> durandal_1707: for artificial content you could try testsrc or testsrc2
[00:23:23 CEST] <durandal_1707> I mean non-boring content
[00:24:05 CEST] <durandal_1707> something like big buck buny but 16 bit
[00:24:42 CEST] <durandal_1707> besides testsrc2 have noise
[00:25:08 CEST] <jamrial> big buck bunny doesn't?
[00:25:27 CEST] Action: michaelni doesnt have much 16bit content especially not noiseless ...
[00:26:20 CEST] <durandal_1707> jamrial: yes, they are images iirc 
[00:27:40 CEST] <durandal_1707> those bitplanes with pure noise effectively have no useful signal, so just ditch plane
[00:28:18 CEST] <durandal_1707> and you now have lossy ffv1
[04:19:30 CEST] <cone-771> ffmpeg 03Jan Sebechlebsky 07master:9023a4a30c83: doc/APIchanges: Document addition of list BSF API in lavc
[04:25:13 CEST] <cone-771> ffmpeg 03James Almer 07master:f85842b09e08: doc/APIChanges: fill in missing git hashes
[13:49:10 CEST] <cone-607> ffmpeg 03Paul B Mahol 07master:ed8d7e7a9b66: avfilter: add bitplanenoise filter
[13:49:10 CEST] <cone-607> ffmpeg 03Paul B Mahol 07master:d299defbba30: avfilter/Makefile & allfilters: sort entries
[14:29:37 CEST] <durandal_1707> michaelni: idea for outreach: mt in lavfi
[14:32:04 CEST] <durandal_1707> *frame mt
[14:51:02 CEST] <michaelni> durandal_1707, feel free to add it to https://trac.ffmpeg.org/wiki/SponsoringPrograms/Outreachy/2016-12 if you want to mentor it
[15:36:03 CEST] <cone-607> ffmpeg 03Clément BSsch 07master:2477775bf837: doc: add Libav merge document
[16:34:25 CEST] <cone-607> ffmpeg 03Clément BSsch 07master:b2016189db99: lavf/utils: add some const to pointers parameters in a few functions
[16:34:26 CEST] <cone-607> ffmpeg 03Clément BSsch 07master:ffd71c9c5c64: lavf: mark stream as const pointer in av_stream_get_side_data() for next bump
[16:34:27 CEST] <cone-607> ffmpeg 03Clément BSsch 07master:fabff1024438: lavf/version: fix belive/believe typo
[16:36:31 CEST] <kierank> does movd have alignment restrictions
[16:49:22 CEST] <durandal_1707> Compn: what happened to your little task?
[16:50:57 CEST] <Compn> somehing cam up
[16:50:59 CEST] <Compn> ready now
[16:52:00 CEST] <Compn> so someone paid you to do sheer stuff? :)
[17:05:26 CEST] <jamrial> kierank: no
[17:23:09 CEST] <durandal_1707> Compn: aliens
[17:23:10 CEST] <Compn> durandal_1707 : ok, figured out sheer
[17:23:14 CEST] <Compn> added to mplayer
[17:23:18 CEST] <Compn> testing all samples now
[17:23:59 CEST] <durandal_1707> that player doesn't care
[17:24:22 CEST] <Compn> ?
[17:24:55 CEST] <durandal_1707> guess our lord and savior
[17:29:54 CEST] <Compn> vlc ?
[17:35:25 CEST] <Compn> durandal_1707 : sheer added to mplayer
[17:35:42 CEST] <Compn> and ylc codec (sssssh i didnt test)
[17:37:51 CEST] <jamrial> ubitux: there was no need to bump minor for that scheduled const change. there's no effective change right now to justify it
[17:38:27 CEST] <ubitux> it was said to follow that ifdefery dance on the ml
[17:38:35 CEST] <ubitux> so i did
[17:38:43 CEST] <jamrial> ah
[17:38:52 CEST] <jamrial> it's not an isse anyway
[17:39:03 CEST] <jamrial> but IMO was not necessary
[17:42:32 CEST] <durandal_1707> Compn: hurray!
[18:08:56 CEST] <cone-607> ffmpeg 03Carl Eugen Hoyos 07master:4c42d30602f1: lavf/pcmdec: Map mime_type audio/L16 to the s16le demuxer.
[18:08:57 CEST] <cone-607> ffmpeg 03Carl Eugen Hoyos 07master:ec9d7047c441: ffmpeg: Do not set too large bits_per_raw_sample.
[18:12:04 CEST] <cone-607> ffmpeg 03Stephen Hutchinson 07master:f84cff8565e9: compat/avisynth: update AviSynth+ header
[18:26:32 CEST] <durandal_1707> why tinterlace mode merge sets strange dar
[22:03:21 CEST] <cone-176> ffmpeg 03Paul B Mahol 07master:345c252e9c19: avfilter/avf_showspectrum: unbreak dB legend
[22:03:21 CEST] <cone-176> ffmpeg 03Paul B Mahol 07master:5ee5f4b13cc4: avfilter/avf_showfreqs: make minimum amplitude for log scaler configurable
[22:10:57 CEST] <cone-176> ffmpeg 03Carl Eugen Hoyos 07master:a810126fd1b9: lavc/rscc: Fix colourspace for codec_tag RSCC and 32bpp.
[22:40:06 CEST] <durandal_1707> michaelni: default resampling params give poor quality
[22:42:33 CEST] <durandal_17> michaelni: try:  ./ffmpeg.exe -f lavfi -i aevalsrc="0.9*sin(PI*t*t*t*t):s=96000",aresample=44100 -lavfi showspectrum=scale=log -f nut -c:v rawvideo -an -|mplayer.exe -
[22:43:54 CEST] <jamrial_> durandal_17: did you open the swr_drop_output bug ticket? wm4 seems to have trouble with it and ended up working around it in a sledgehammer way
[22:45:48 CEST] <durandal_1707> jamrial: nope, but try looping audio with swr
[22:46:21 CEST] <durandal_1707> I planned to wrote using example program
[22:46:57 CEST] <durandal_1707> but give up finding there are useless exampless in docs 
[22:51:28 CEST] <durandal_17> eg: no example that does decoding and resampling at same time
[23:01:50 CEST] <kierank> durandal_17: swresample and avresample docs are useless as well
[23:03:47 CEST] <durandal_17> jamrial_: swr_drop_output may be culprit
[23:04:16 CEST] <durandal_17> so you loop and resample at same time
[23:04:27 CEST] <michaelni> durandal_17, the swr filter parameters where tuned by some people with ears, so quality of th default filters should be good
[23:04:59 CEST] <kierank> durandal_17: swr_compensate isn't documented at all
[23:05:26 CEST] <durandal_17> michaelni: i can hear another signal in command i gave
[23:05:53 CEST] <durandal_17> and its obvious if you use log scaler to see it
[23:06:41 CEST] <durandal_17> the soxr resampler in swr does not exibit this bug
[23:09:03 CEST] <durandal_17> try:  ./ffmpeg.exe -f lavfi -i aevalsrc="0.9*sin(PI*t*t*t*t):s=96000",aresample=44100:resampler=soxr -lavfi showspectrum=scale=log -f nut -c:v rawvideo -an -|mplayer.exe -
[23:11:10 CEST] <michaelni> filter_size=256:linear_interp=1 should avoid the vissible stuff too
[23:12:06 CEST] <michaelni> the parameters simply where tuned to be fastest where absolutely no artifacts could be heared on real world material IIRC
[23:12:56 CEST] <michaelni> if you can hear artifacts with real world material then please tell me what the fastest parameters are that are free of audible artifacts
[00:00:00 CEST] --- Thu Aug 18 2016