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.
