[Ffmpeg-devel-irc] ffmpeg-devel.log.20190501

[burek]

[06:50:28 CEST] <jya> was looking at mozilla bug https://bugzilla.mozilla.org/show_bug.cgi?id=1538154, when youtube-dl downloads an AV1 stream from YouTube and separately the audio stream, when remuxing the mp4 generated by FFmpeg doesn't contain a av1C box. Per spec,  AV1CodecConfigurationBox is compulsory .
[07:08:12 CEST] <jya> actually, after upgrading to ffmpeg 4.1.3, the issue no longer occurs.
[11:50:55 CEST] <durandal_1707> ls BRAW
[13:00:36 CEST] <cone-397> ffmpeg 03Paul B Mahol 07master:d010bfad3179: avfilter/af_crossfeed: add timeline support
[13:00:36 CEST] <cone-397> ffmpeg 03Paul B Mahol 07master:0ee65ea95c03: avfilter/af_extrastereo: add timeline support
[13:00:36 CEST] <cone-397> ffmpeg 03Paul B Mahol 07master:01204c04b025: avfilter/af_stereowiden: add timeline support
[13:00:36 CEST] <cone-397> ffmpeg 03Paul B Mahol 07master:255feeccc560: avfilter/af_biquads: add timeline support
[15:21:49 CEST] <BradleyS> durandal_1707: what about braw
[15:21:56 CEST] <BradleyS> you need a sample?
[15:22:30 CEST] <durandal_1707> BradleyS: for a moment i thought this channel is my shell
[15:22:52 CEST] <BradleyS> oh, the l looked like an i... is braw
[21:19:38 CEST] <cone-508> ffmpeg 03Paul B Mahol 07master:a7fa89fa0bde: avfilter/avf_abitscope: switch to activate
[21:24:28 CEST] <cone-508> ffmpeg 03Paul B Mahol 07master:d3d1d5936fdc: avfilter/vf_tonemap: add slice threading
[22:39:01 CEST] <cehoyos> Suse / Packman is distributing a binary with --enable-nonfree, I have contacted them.
[23:02:38 CEST] <durandal_1707> cehoyos: sue them
[23:04:37 CEST] <cehoyos> Their first answer was mostly "go away", I tried to stay friendly and sent them another message.
[23:13:32 CEST] <jkqxz> cehoyos:  I'm not sure that overloading pix_fmt for decode_format works - there are cases where you can set both options, with different values.
[23:14:09 CEST] <jkqxz> For example, with a webcam you might do "ffmpeg ... -pix_fmt mjpeg -f v4l2 -hwaccel vaapi -decode_format vaapi -i /dev/video0 ...".
[23:17:55 CEST] <jkqxz> The lavf setting would need some conditionality to make it work anyway (since most demuxers don't accept pixel_format), but I don't see how to avoid the two values clashing in the above case.
[23:18:10 CEST] <cehoyos> That's why I asked if it's possible. In your example, since mjpeg is not a pix_fmt, I would prefer if there was another option for v4l2.
[23:18:39 CEST] <jkqxz> It's a string option and not an actual AV_PIX_FMT, unfortunately.
[23:20:46 CEST] <jkqxz> You can use it under a different name with V4L2 (-input_format), but <http://git.videolan.org/?p=ffmpeg.git;a=blob;f=fftools/ffmpeg_opt.c;h=53d688b76499b8e1a20514119b65402940fe27e0;hb=HEAD#l1072> would still catch the second pix_fmt setting without some unclear additional magic.
[00:00:00 CEST] --- Thu May  2 2019