ffmpeg-0.8 expects wrong preset file extension (.ffpreset instead of .avpreset)

[Laurento <laurento.frittella@gmail.com>]

I'm using ffmpeg 4:0.8-1 and libav-tools 4:0.8-1+b1 from squeeze-backports

# strace -e trace=open,close /usr/bin/ffmpeg -i 'test-orig.mp4'
-vcodec 'libx264' -vpre 'libx264-fast' -s '640x480' -acodec
'libvo_aacenc' -ac '2'  test-final.mp4

[...]
open("/root/.avconv/libx264-fast.ffpreset", O_RDONLY) = -1 ENOENT (No
such file or directory)
open("/root/.avconv/libx264-libx264-fast.ffpreset", O_RDONLY) = -1
ENOENT (No such file or directory)
open("/usr/share/avconv/libx264-fast.ffpreset", O_RDONLY) = -1 ENOENT
(No such file or directory)
open("/usr/share/avconv/libx264-libx264-fast.ffpreset", O_RDONLY) = -1
ENOENT (No such file or directory)
File for preset 'libx264-fast' not found

As you can see in the strace output ffmpeg searches for a .ffpreset
file instead of .avpreset that is the presets file extension used in
libav-tools (all the preset files under /usr/share/avconv/ are
.avpreset)

Just as a temporary workaround simply adding a symlink (Eg: ln -s
/usr/share/avconv/libx264-fast.avpreset
/usr/share/avconv/libx264-fast.ffpreset) do the trick.

Cheers,
Laurento