Comments regarding the following discussion have been appended to the end of
this email.
Also, the following URL might help if you're interested in the whole
conversation:
http://www.debian-multimedia.org/lurker/search/20121201.000000.00000000@sb:vlc.en.html
On Tue, Jan 25, 2011 at 6:27 PM, Jose Juan Montiel <
josejuan.montiel@???> wrote:
> Hi,
>
>
> managed to reproduce this problem (using SID+dmo on my x1250 based
> motherboard). I think the issue is with libswscale (not libavc*).
>
> Mostly because vlc complains:
>
> swScaler: pal8 is not supported as output pixel format
> [0x8bcc4bc] swscale scale error: could not init SwScaler and/or allocate
> memory
>
> Not to mention, the problem goes away by doing "sudo dpkg --force-depends
> -P libswscale0" (i.e. removing the dmo package) and then "sudo dpkg -i
> libswscale0_4%3a0.5.2-6_i386.deb" (i.e. installing the SID package).
>
> i install this, i think the same that you describe, but no luck.
>
> ii vlc 1.1.5-3
> multimedia player and streamer
> ii vlc-nox 1.1.5-3
> multimedia player and streamer (without X support)
> ii vlc-plugin-notify 1.1.5-3
> LibNotify plugin for VLC
> ii vlc-plugin-pulse 1.1.5-3
> PulseAudio plugin for VLC
> ii libswscale0 4:0.5.2-6
> ffmpeg video scaling library
>
>
>
I've done some more digging and it seems that the problem actually lies with
VLC. Beginning with git commit f82674e584d0550f3000658c6a579c4b9db139fe,
the ffmpeg developers broke API/ABI backward compatibility in
"libavutil/pixfmt.h".
As such, they also bumped the version in "libavutil/avutil.h".
All this leads us to what seems to be the culprit... VLC's
"modules/codec/avcodec/chroma.c", which does not yet accomodate the updates
to ffmeg's new pixfmt.h. It's a pretty common problem actually, especially
if you're not working within the confines of a *formal* object model (one of
the things I always liked about COM).
Anyway, I'm not sure if the VLC people know about this... so I'm cc'ing
their dev list.
In addition, I didn't notice any warnings when running VLC (even w/ -v
switch) regarding possible .so version conflicts. Not sure if the VLC
people have plans on doing a run-time version compatibility check but...
running "nm libavutil.a" shows that "avutil_version" seems to be available
for such things. Not quite the same as COM's queryinterface... but probably
sufficient :-P
After realizing all this, it should come as no surprise that we're getting
the "swScaler: pal8 is not supported as output pixel format" message, right?
So, I don't have a precise suggestion Jose... except that the unstable repos
are what they are; "latest" is not necessarily "greatest" ;-) But... I'm
pretty sure that these things will get sorted out in due time.
If you want to keep using dmo+unstable... you could pin avutils, swscaler,
and friends to the pre-f82674e584d0550f3000658c6a579c4b9db139fe version;
maybe Christian can explain exactly how that's done - for now, I'm just
sticking w/ Lenny ;-)
If it means that much... one could always try fixing the problem themselves
:-/ I'd offer to do it except that I need to bring home some bacon, lol; so
I can't say it's high on my list of priorities right now. I'm kind of just
hoping that emailing "higher authorities" will help move things along for
you.
-Best wishes
