[Ffmpeg-devel-irc] ffmpeg.log.20181126

burek burek021 at gmail.com
Tue Nov 27 03:05:01 EET 2018

[01:48:29 CET] <iio7> I have a h265 mkv file with several audio tracks I want to remove, so I basically did this: "ffmpeg -i foo.mkv -map 0:0 -vcodec copy -map 0:1 -acodec copy -sn -threads 8 bar.mkv", I suspected it would use all threads, but it's only using 1. I also suspected, since it's just a copy, it would be rather quick, but it takes several hours on a 3Ghz i7. Am I missing something?
[01:53:01 CET] <Hello71> is your storage device very slow
[01:53:18 CET] <iio7> No.
[04:00:07 CET] <Alish> how to add blur to a some screen area for some seconds?
[04:00:32 CET] <Alish> !info blur
[04:04:59 CET] <Alish> and can this be reversed if I make a videe, blur it and upload to youtube?
[04:05:21 CET] <Alish> then anyone who downloaded can undo th blur?
[04:12:02 CET] <Alish> how to add blur to a some screen area for some seconds?
[04:35:29 CET] <Alish> Input #0, matroska,webm, from 'mobi.mkv':
[04:35:31 CET] <Alish>   Metadata:
[04:35:33 CET] <Alish>     COM.ANDROID.VERSION: 7.0
[04:35:35 CET] <Alish>     MAJOR_BRAND     : mp42
[04:35:37 CET] <Alish>     MINOR_VERSION   : 0
[04:35:39 CET] <Alish>     COMPATIBLE_BRANDS: isommp42
[04:35:41 CET] <Alish>     ENCODER         : Lavf58.20.100
[04:35:43 CET] <Alish>   Duration: 00:04:58.98, start: 0.000000, bitrate: 924 kb/s
[04:35:45 CET] <Alish>     Stream #0:0(eng): Video: h264 (High), yuv420p(progressive), 1080x1920 [SAR 1:1 DAR 9:16], 20.59 fps, 20.59 tbr, 1k tbn, 41.17 tbc (default)
[04:35:47 CET] <Alish>     Metadata:
[04:35:49 CET] <Alish>       HANDLER_NAME    : VideoHandle
[04:35:51 CET] <Alish>       ENCODER         : Lavc58.35.100 libx264
[04:35:53 CET] <Alish>       DURATION        : 00:04:58.982000000
[04:35:58 CET] <Alish> here is the ffprobe for the video. I just wanna hide th keyboard for some seconds
[05:48:53 CET] <Fenrirthviti> Alish: In the future, you'll want to use something like pastebin for output like that, spamming the channel is pretty well frowned upon
[08:09:29 CET] <idlus> Hi, Id like to use the documented "tpad" filter, but it doesnt seem to be included in my ffmpeg (arch package), my ffmpeg-filters manpage doesnt even mention it.
[11:10:03 CET] <relaxed> idlus: you need a more recent version. Arch probably has a option to install ffmpeg git master
[13:26:14 CET] <idlus> relaxed: I just upgraded 4.0.2 to 4.1, still without tpad, so it means the documentations includes features not yet released? Ill try the git version.
[13:31:59 CET] <BtbN> tpad was added 2018-11-02, 4.1 was branched the same day, so it very narrowly missed the cutoff
[13:34:58 CET] <idlus> BtbN: ok, I only looked at the release summaries to see if it was a new feature, didnt think it would be documented otherwise. Good to know.
[13:35:18 CET] <BtbN> The releases pretty much only exist to make distributions happy
[17:11:57 CET] <kepstin> ah, tpad filter looks handy. I was thinking of adding something to the fps filter to allow extending a video by repeating the last frame, but this more general filter is probably a better idea.
[17:56:54 CET] <utack_> where was the discussion about "pict_type=?" for AV1 in ffprobe again? I think JEEB said it was arleady discussed somewhere to fix it
[21:08:43 CET] <lavaflow> I've go a file where stream 0:0 is audio and 0:1 is video, and I'd like two swap them around without reencoding the whole deal, how can I do that?
[21:09:46 CET] <pink_mist> mkvmerge?
[21:10:10 CET] <JEEB> or just remux?
[21:10:13 CET] <klaxa> ffmpeg -i input.mkv -map 0:v -map 0:a -c copy output.mkv ?
[21:10:19 CET] <JEEB> by mapping first the one you want first
[21:10:24 CET] <klaxa> or rather -map 0:1 -map 0:0
[21:10:55 CET] <JEEB> (when you add -map into ffmpeg.c cli, it will stop any automagic stream selection)
[21:25:23 CET] <Alina-malina> ffmpeg -i D:\VIDZ\episode40.mp4 -i D:\VIDZ\episode40_ready.mp3 -vf "fade=out:221:29" -c:v copy -map 0:v:0 -map 1:a:0  D:\VIDZ\episode40_SOUNDED.mp4  i am trying to add fade out at the end but i get an error like:  Filtergraph 'fade=out:91:29, fade=out:221:29' was defined for video output stream 0:0 but codec copy was selected.  Filtering and streamcopy cannot be used together.
[21:38:57 CET] <lavaflow> thank you all
[21:52:18 CET] <JEEB> &25
[00:00:00 CET] --- Tue Nov 27 2018

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