Re: Problem with VLC H 264 after having installed ISPY package
On Thu 17 Apr 2025 at 16:32:26 (+0200), Bernard wrote:
> vlc 3.0.21 (Vetinari) – Debian 11
>
> ⇒ vlc no longer reckognises nor plays mp4 files ; it now only plays
> their audio part :
>
> « Codec non pris en charge:VLC ne peut pas décoder le format « h264 »
> (H264 - MPEG-4 AVC (part 10)) »
>
> needless to say that it did work before !
>
> If calling a .ts file with VLC…, I get no error message… but it only
> plays the audio part, same as with mp4.
>
> True enough, during the process of installing ISPY, there was a
> warning… but, everyone knows what it is, in the rush I forgot to take
> precise note of said warning. It said something like this, as far as I
> can remember :
Perhaps:
"GPU hardware acceleration support requires libva ≥ 2.21"
"This is needed for FFmpeg v7 to properly utilize your GPU for"
"video encoding/decoding, which can significantly improve"
"performance and reduce CPU usage."
"Warning: this may cause issues with other software running on your system."
> « Your system (or such or such component…) is too slow. Would you
> accept to increase this or that… ? It won’t pose problem to your
> system, but it might affect some components... (Y/N) »
>
> I then replied « Y », in the reasoning that I could, in case of
> problem, reverse the situation in removing and purging the ISPY
> package.
>
> As previously said, VLC now disfunctions. Maybe something else will
> also dysfunction, but I haven’t yet come across such finding.
>
> Once installed, ISPY seemed to work, but I soon found that it wasn’t
> what I had expected, so I decided to discard it, and to return the
> ISPY camera to where I had bought it.
>
> I had installed this package using the command line below :
If you don't still have the scripts, I would download them again,
and then read them through. (Download in turn what they download.)
> Once I found that VLC no longer worked OK, I first tried to reinstall
> VLC. The version available for install happened to be the same one as
> that I already had, that is, 3.0.21. So, I did remove and purge it,
> then re-installed 3.0.21
>
> Problem is, when I tested this newly installed VLC, it did behave as
> previously, that is, it refused to play the video part of mp4 files
> and displayed the previously mentioned error message.
>
> Next, I tried to play those mp4 and ts using ‘Vidéos’ instead of vlc :
>
> "- Impossible to read the file – Decoder H 264 is required to read
> this file, but it is not installed… Unfortunately, this H 264 decoder
> is not found on your system…"
>
> Must have been there before, though !!
It looks as if the scripts might have built and installed some library
with a higher version number (look at the libva.sh script).
You could run a command like:
$ aptitude search "?narrow(?installed,?not(?archive(stable)))"
to see whether all the packages on your system originate in bookworm.
Cheers,
David.
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