Re: Video recording project status.

Hi Stepan,

Congratulations, this is a very good job.

I only tested it on Ubuntu 12.04 x64 so far, but it works nicely and
smoothly, and I can hardly find something that can be improved. Good job
again!

The main problems I experienced were when trying to play with the
codecs, and had mainly results with libvpx and libx264. This may however
be due to some unrelated problems such as the container format being
used, and for example, using libtheora codec seems to lead to an invalid
file until the 'ogg' container is being used.

Some codecs might also need some specific configuration flags such as
the ones you added for libx264. For example, using libxvid seems to lead
invariably to the message 'Invalid pixel aspect ratio 0/1', and this may
be due to some additional settings that would be needed.

The point here is not to try to support all codecs and all versions of
the codecs, but instead it may be interesting to test and document the
main codecs and containers that are known to work well so that a user
doesn't have to search for that information.

I also experienced some problems when recording at higher framerates
that my system can sustain, and using the 'variable framerate' setting
(the 'vfr' mode). In this case, the video that is recorded gets
corrupted at some point, see eg the screenshot in attachement, it is
supposed to be the 'castle' map.

In this case, libvpx also uses to throw the following message when
trying to finalize the file:

"[libvpx @ 0x7f55840027a0] Compressed frame larger than storage
provided! (211649/200000)"

Bye,
Christian

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