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Re: fmpeg drift (2)

From "Carlos E.R." <robin_listas@es.invalid>
Newsgroups comp.os.linux.misc
Subject Re: fmpeg drift (2)
Date 2025-11-16 15:19 +0100
Message-ID <p43pulxqdv.ln2@Telcontar.valinor> (permalink)
References (7 earlier) <ffmpeg-20251114231123@ram.dialup.fu-berlin.de> <jsokulxo6q.ln2@Telcontar.valinor> <ffmpeg-20251115002632@ram.dialup.fu-berlin.de> <89fnulx8b7.ln2@Telcontar.valinor> <codec-20251116142803@ram.dialup.fu-berlin.de>

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On 2025-11-16 14:34, Stefan Ram wrote:
> "Carlos E.R." <robin_listas@es.invalid> wrote or quoted:
>> ffmpeg -i movie.mkv -vf "scale=-1:802,format=yuv420p" -map 0
>> -c:v libx264 -preset fast -crf 22 -tune fastdecode -profile:v
>> main -c:a aac -b:a 192k -c:s copy -disposition:a:0 default
>> 8c_movie.mkv
> . . .
>> [00007f0014f467d0] main decoder error: Codec `mp4a' (MPEG AAC
>> Audio) is not supported.              <============
> 
>    When the audio codec is not supported by the player,
>    it might help to try a different codec. For a start,
>    the following line should request no audio-transcod-
>    ing at all:
> 
> ffmpeg -i movie.mkv -map 0 -c:v libx264 -vf
> "scale=-1:802,format=yuv420p" -preset fast -crf 22 -tune
> fastdecode -profile:v main -c:a copy -c:s copy 8c_movie.mkv
> 
>    by "-c:a copy".

I tried that before, different failure.

> 
>    Then, you could try to downmix the six channels to stereo
>    if acceptable, replacing, "-c:a copy" with,
> 
> |-c:a aac -b:a 192k -ac 2
> 
>    , or you could try another audio encoding, replacing
>    "-c:a copy" with,
> 
> |-c:a ac3 -b:a 640k

I tried "-c:a libopus -ac 6 "

Vlc barfed:

[00007f2468f46ab0] opus decoder error: cannot read Opus header
[00007f2468f46ab0] opus decoder error: initial Opus header is corrupted


I can try your suggestion later, thanks.


-- 
Cheers, Carlos.
ES🇪🇸, EU🇪🇺;

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Thread

My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-12 23:20 +0000
  Re: My 2 favorite tools for reading Linux manual pages the easy way Nuno Silva <nunojsilva@invalid.invalid> - 2025-11-12 23:51 +0000
    Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-13 11:01 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-13 20:05 +0000
  Re: My 2 favorite tools for reading Linux manual pages the easy way Chris Ahlstrom <OFeem1987@teleworm.us> - 2025-11-13 08:29 -0500
    Re: My 2 favorite tools for reading Linux manual pages the easy way vallor <vallor@vallor.earth> - 2025-11-13 14:46 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way Chris Ahlstrom <OFeem1987@teleworm.us> - 2025-11-13 11:35 -0500
  Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 14:56 +0100
    Re: My 2 favorite tools for reading Linux manual pages the easy way vallor <vallor@vallor.earth> - 2025-11-13 14:54 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 23:14 +0100
    Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-13 20:03 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way vallor <vallor@vallor.earth> - 2025-11-13 20:12 +0000
        Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-13 22:23 +0100
          Re: My 2 favorite tools for reading Linux manual pages the easy way not@telling.you.invalid (Computer Nerd Kev) - 2025-11-15 07:25 +1000
            Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-14 22:58 +0100
              Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-14 22:12 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-15 00:00 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-14 23:27 +0000
                fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:29 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 00:39 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 03:00 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 02:33 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 15:03 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 21:25 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-17 12:48 +0100
                Re: fmpeg drift (1) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-18 01:00 +0000
                Re: fmpeg drift (1) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-18 07:22 +0100
                fmpeg drift (2) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:34 +0100
                Re: fmpeg drift (2) ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-16 13:34 +0000
                Re: fmpeg drift (2) "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 15:19 +0100
                Re: fmpeg drift (2) - solved? "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 23:56 +0100
                Re: fmpeg drift (2) - solved? Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-17 00:49 +0000
                Re: fmpeg drift (2) - solved? "Carlos E.R." <robin_listas@es.invalid> - 2025-11-17 03:17 +0100
                Re: fmpeg drift (2) - solved? Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-17 02:39 +0000
                Re: fmpeg drift (2) Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 21:21 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Joerg Walther <joerg.walther@magenta.de> - 2025-11-15 09:50 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 22:09 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:00 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 00:32 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 03:01 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 02:33 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 23:09 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-16 22:41 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-16 22:45 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Joerg Walther <joerg.walther@magenta.de> - 2025-11-16 11:32 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way "Carlos E.R." <robin_listas@es.invalid> - 2025-11-16 00:26 +0100
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 02:35 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 02:37 +0000
            Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 02:33 +0000
              Re: My 2 favorite tools for reading Linux manual pages the easy way not@telling.you.invalid (Computer Nerd Kev) - 2025-11-16 07:31 +1000
                Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-15 22:08 +0000
                Re: My 2 favorite tools for reading Linux manual pages the easy way not@telling.you.invalid (Computer Nerd Kev) - 2025-11-17 07:00 +1000
  Re: My 2 favorite tools for reading Linux manual pages the easy way candycanearter07 <candycanearter07@candycanearter07.nomail.afraid> - 2025-11-13 18:50 +0000
    Re: My 2 favorite tools for reading Linux manual pages the easy way ram@zedat.fu-berlin.de (Stefan Ram) - 2025-11-13 19:20 +0000
      Re: My 2 favorite tools for reading Linux manual pages the easy way Lawrence D’Oliveiro <ldo@nz.invalid> - 2025-11-13 20:12 +0000
        Re: My 2 favorite tools for reading Linux manual pages the easy way Nuno Silva <nunojsilva@invalid.invalid> - 2025-11-13 23:32 +0000

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