Re: Problem with VLC H 264 after having installed ISPY package

[Bernard <bdebreil@free.fr>]

I have now completely de-installed and removed the ISPY package (also 
known as ‘AgentDVR’), according to the process explained on their site.

Next, I have checked the install log file that had been generated by 
this previous install process :

/var/log/agentdvr_setup.log (1156 lines)

which shows that this ‘ispy’ or ‘agentDVR’ install...

HAD TRIGGERED AN UNEXPECTED UPDATE of my system… ! (automatic updates 
were de-activated in my Debian 11)

Now, googling the web, I found several posts from other debian 11 users 
who complained that their VLC ceased to play mp4 and other H264 files, 
right after an update of their system !

One of these complainers got a reply, advising to install/re-install 
libavcodec58… which seems to have solved his problem. I tested the same 
thing here, to no avail. There may be some other codecs that I should 
install/re-install… but I don’t know which ones…

Thanks in advance for your help solving my VLC / H264 problem after that 
unexpected update of my Debian 11

On 17/04/2025 16:32, Bernard wrote:
> Hi to Everyone !
>
> 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 !
..........