Tell me if you have an easier fix for that.

script execution time: 55"

avcodec.h says this should be preferred for both mpeg1 and 2.

libavcodec 54. 86.100 wmv2 and mpeg4 decoders ignore this flag
(probably inside some dsp routine), provoking segfault.
Turning off direct rendering is a quick but nasty workaround.
If vo plugin can crop, we may drop that emulation without
performance penalty, and sometimes even speed up a little.

Prevent vo loop from calculating undefined aspect ratio
from _padded_ image size, leading to black bars and
unnecessary scaling.

* Observe channel configuration immediately after av_decode_audio* ().
    Do not try to access nonexistant channels after a 5.1 -> 2.0 switch
    for example.

* Add NULL plane pointer paranoia.

* Assume generic channel layout when no detailled one provided.
    Needed for wma2.

* Follow user speaker arrangement changes on the fly.

* Defer opening audio out until we have something to play.

* Do not reopen audio out with identical settings. This and the
    previous item should help avoiding waiting on some drivers.

* Hard wire output to int16_t. Some of the code did assume that,
    and we are converting to that anyway.

* Do not read sample format from bits_per_coded_sample. Decoders
    neither alter that field, nor do they force its value to their
    output.

* Rename some vars for better readability.