[Ffmpeg-devel-irc] ffmpeg.log.20170826

[burek]

[01:43:49 CEST] <wiak> for some reason my relay rtmp ffmpeg stream has audio out of sync
[01:44:10 CEST] <wiak> https://gist.githubusercontent.com/nwgat/82d069feb75be7d0e4ec7de71cd8c263/raw/52c94314c327a86ec4d121ba1056ba67b774fb46/simulcast.sh
[01:44:18 CEST] <wiak> there is the cli
[01:44:57 CEST] <wiak> am using obs studio 20 as souce
[01:55:28 CEST] <furq> you should probably use a real rtmp server as a relay
[01:55:52 CEST] <furq> i've not really used ffmpeg's -listen stuff but based on how few people seem to use it, i expect it's not very good
[01:56:19 CEST] <furq> you can exec ffmpeg to do the reencoding from nginx-rtmp
[02:05:39 CEST] <leeaandrob> hello
[02:16:33 CEST] <ThugAim> herro
[02:17:20 CEST] <leeaandrob> :)
[03:12:37 CEST] <noop__> Hi everyone! is there any C code available that demonstrates how to convert AV_PIX_FMT_YUV420P to AV_PIX_FMT_RGB24?
[03:13:15 CEST] <noop__> I have written some code, but it writes junk to the last two columns of every frame
[03:13:45 CEST] <DHE> libswscale I think... or you can use libavfilter and have it do the heavy lifting
[03:16:33 CEST] <JCount_> Can anyone provide some advice on how to report a build related regression? In this case, configuring with --enable-hardcoded-tables causes the build to fail with a linker error: 'ld: symbol(s) not found for architecture x86_64'.
[03:18:28 CEST] <noop__> thanks! I'm already using libswscale (sws_getContext, then av_read_frame, avcoded_send_packet, avcodec_receive_frame and then then sws_scale)
[03:22:57 CEST] <JCount_> The relevant patch is http://ffmpeg.org/pipermail/ffmpeg-devel/2017-August/215104.html or commit dbc9a8f21f92d0613142ea23bb836356fc41de38 in master.
[05:36:24 CEST] <wiak> furq seem to work better hehe, that nginx-rtmp, tried it before but it seems i had to push the stream to get it to work ;P
[05:36:42 CEST] <wiak> furq https://www.smashcast.tv/nwgat
[05:36:43 CEST] <wiak> )
[18:40:34 CEST] <blerrp> regarding mp3 id3 metadata: do you know if proper comment tag (id3 frame COMM) is supported? doing `ffmpeg -metadata 'comment=foobar'` seems to write a TXXX frame with description=comment, and this is not readable as a comment by many/most common mp3 players
[18:41:36 CEST] <ChocolateArmpits> Can ffmpeg potentially stall if input timestamp is lower than the previous timestamp ?
[18:43:02 CEST] <azarus> How can I enable the x11grab device?
[18:43:13 CEST] <JEEB> ChocolateArmpits: the only thing that could put things to sleep() is the -re mode which in general you shouldn't be using
[18:43:31 CEST] <JEEB> otherwise, no. it shouldn't stall but more likely throw an error if the timestamps go backwards
[18:47:42 CEST] <ChocolateArmpits> What about timestamps that go excessively forward, would -re cause blank frames to be rendered to account for the output time?
[18:48:31 CEST] <JEEB> no, -re would just wait until that timestamp, which is why you shouldn't trust -re at all
[18:49:01 CEST] <JEEB> because if you get a timestamp funkiness in there, it will do weird-ass things
[18:59:47 CEST] <zarac> azarus: got it working ok (x11grab)?
[19:08:30 CEST] <zarac> azarus: I went through the same thing yesterday. I made a little script that helps starting the recording. https://gist.github.com/zarac/42e76ac8c78ebeb7a69ed410fa3070c0
[19:09:37 CEST] <zarac> azarus: It's quite simple to use.. and the code kinda explains it. It has a nifty feature that helps you resizing the window (using wmctrl).
[19:11:37 CEST] <zarac> There is however a issue with the last part of the audio getting cut off... but perhaps you dont' have this issue.. it seems to be a bug using pulse (maybe you can use alsa instead).
[19:15:37 CEST] <zarac> (btw, a ffmpeg bug, not in that ffrecord... just to be clear) : )
[19:53:46 CEST] <Pandela> Morning peoples
[19:54:04 CEST] <Pandela> Does anyone know a way to compile FFmpeg in windows 7 with ladspa support?
[19:54:55 CEST] <durandal_1707> Pandela: just get header installed in right spot
[19:55:40 CEST] <durandal_1707> btw which ladspa plugin you want to use?
[19:56:22 CEST] <Pandela> durandal_1707: Stuff like cmt, swh and other libraries
[19:57:30 CEST] <durandal_1707> Pandela: if you use mingw64 msys2 project it should be easy to compile ffmpeg
[19:58:31 CEST] <Pandela> Thanks!
[19:58:32 CEST] <Pandela> durandal_1707: Do you have any clues how I would go about the Ladspa header in windows? I have only compiled FFmpeg in linux personally
[19:59:14 CEST] <durandal_1707> with mingw64 just install header with pacmam
[19:59:25 CEST] <durandal_1707> *pacman
[20:06:39 CEST] <Pandela> Back, internet died lol
[20:07:07 CEST] <Pandela> durandal_1707: But yeah let me try that out, thanks for the tip c:
[00:00:00 CEST] --- Sun Aug 27 2017