Arch Linux

Rachus

Member

Registered: 2012-12-12

Posts: 34

Message by mpv and ffplay when playing certain flac files

When playing certain flac files with mpv or ffplay, I experience colored messages which might be warnings or errors in the terminal. I don't hear that something is wrong with the audio and therefore I ignored it for a long time. But I'm a bit curious why this message occures because the files are converted from CDs with the flac tool itself. The output I am talking about looks like this (in orange) when playing with mpv:

[ffmpeg] NULL: sample/frame number mismatch in adjacent frames

And it looks like this when playing with ffplay (in cyan and orange):

[flac @ 0x7f73e0001760] sample/frame number mismatch in adjacent frames

When decoding with the flac utility, I don't see any messages. Does anybody know, where this behavior comes from? Might it be a good idea to rip and reencode the audio again or can I safely ignore these messages?

Last edited by Rachus (2015-03-14 16:59:26)

karol

Archivist

Registered: 2009-05-06

Posts: 25,440

Re: Message by mpv and ffplay when playing certain flac files

Maybe they're neither warnings nor errors, but info messages.

Are you using mpv and ffmpeg from the repos? Have you tried playing these files on another, non-Arch, system?
Google shows these messages are pretty common, but since nothing seems to be broken, I don't think you need to worry.

Rachus

Member

Registered: 2012-12-12

Posts: 34

Re: Message by mpv and ffplay when playing certain flac files

Thanks for your answer!

Are you using mpv and ffmpeg from the repos?

Yes, they are the vanilla packages from the repos.

Have you tried playing these files on another, non-Arch, system?

Well, I just updated an old Gentoo (which took some time) and experience the same messages with these files. Interestingly, when I fastforward, the message does not appear (on both systems).

Google shows these messages are pretty common, but since nothing seems to be broken, I don't think you need to worry.

Yes, I also tried to search these messages on Google. But I did not understand most of it. It's just that I could not understand why a file that was encoded by flac itself produce errors/warnings or anything like that when playing and just make sure that nothing is broken.

Alad

Wiki Admin/IRC Op

From: Bagelstan

Registered: 2014-05-04

Posts: 2,420

Website

Re: Message by mpv and ffplay when playing certain flac files

Somewhat offtopic, but please don't use colors like that. Especially when they're on a white background.

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gajjanag

Member

From: Cambridge, MA

Registered: 2015-05-10

Posts: 17

Website

Re: Message by mpv and ffplay when playing certain flac files

@Rachus: Bug report is welcome at https://trac.ffmpeg.org

Please read https://www.ffmpeg.org/bugreports.html before submitting.

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"Behind every theorem lies an inequality" - A N Kolmogorov