[Ffmpeg-devel-irc] ffmpeg.log.20181027

[burek]

[02:33:40 CEST] <haasn> Before I bash my head against the desk any further, some quick help would be appreciated. I have a yuv422p10 frame inside y4m inside ivf
[02:33:56 CEST] <haasn> I want the luma channel from this image (discarding chroma completely) as any lossless image format (e.g. 16-bit png)
[02:34:15 CEST] <haasn> I tried using -filter_complex + extractplanes to save the y channel as its own .y4m file, that seemed to work
[02:34:29 CEST] <haasn> but now I need to get it from .y4m into something like .png, and trying to do that results in a messed up image (too bright / wrong levels)
[02:34:52 CEST] <haasn> (the y4m is gray10le)
[02:35:33 CEST] <haasn> It seems like it might be a metadata issue - it displays correctly in `mpv`, but wrongly in `ffplay`
[02:35:39 CEST] <haasn> PC/TV range confusion perhaps
[02:36:12 CEST] <haasn> In mpv the file metadata attribute shows it's tagged as limited, but ffmpeg seems to treat it as full range
[02:36:45 CEST] <haasn> Hmm the same issue happens if I try directly saving the output of extractplanes as png
[02:56:55 CEST] <haasn> nvm I'll just mogrify -fx '(u - 16/255) * 255/219'
[02:57:00 CEST] <haasn> can't be bothered wasting my time on such a stupid issue
[06:24:12 CEST] <worstje> I'm currently trying to save some footage from files that were butchered because of a hard disk crash and make whatever is left into a compliant file. VLC manages to show a couple of seconds, sometimes with audio before stopping. ffmpeg however gets into an eternal loop repeating the same error message. How can I make ffmpeg give up on a particular input like vlc seems to do?
[06:49:21 CEST] <akabuddy> hello all
[06:50:59 CEST] <furq> worstje: try -xerror -err_detect explode
[06:51:07 CEST] <Yagiza> akabuddy, hello!
[06:51:54 CEST] <Yagiza> I implemented RTP sessions for VoIP in my XMPP client.
[06:53:30 CEST] <Yagiza> For some reason opus and speex codex work all right, but with G722 I have distorted sound (like incorrect sample rate).
[06:53:49 CEST] <Yagiza> Is there something special about G722?
[06:53:55 CEST] <akabuddy> I am trying to record line in with alsa, i know im supplying the sound externally, but it isnt actually recording any sound
[06:59:08 CEST] <furq> Yagiza: are you setting the sample rate
[06:59:34 CEST] <Yagiza> furq, well...
[07:00:50 CEST] <Yagiza> furq, yes. I check supported sample rates, then select one.
[07:10:24 CEST] <akabuddy> nevermind
[22:03:25 CEST] <ejr> how can i combine the following two commands into one? ffmpeg -i infile -vcodec copy -af "volume=10db" outfile  /// ffmpeg -n -i infile -f mp3 outfile.mp3 (what i want to do is convert a video to mp3 and increase its size. both commands work independently but i want to do it in one process. i tried combining them but got errors...)
[22:25:11 CEST] <Hello71> did you read the errors
[22:27:34 CEST] <ejr> yeah nvm, just figured it out
[00:00:00 CEST] --- Sun Oct 28 2018