B.2.� Various A-V sync and other audio problemsB.2.� Various A-V sync and other audio problemsPrev� Appendix� B.� Known bugs� NextB.2.� Various A-V sync and other audio problemsB.2.1.� General audio delay or jerky sound
(exists with all or many files)
most common: buggy audio driver! - try to use different drivers, try ALSA OSS
emulation with -ao oss, also try -ao sdl,
sometimes it helps. If your file plays fine with -nosound,
then you can be sure it's sound card (driver) problem.
audio buffer problems (buffer size badly detected)
Workaround: MPlayer's -abs option

samplerate problems - maybe your card doesn't support the samplerate used in
your files - try the resampling filter (-af resample=...)
slow machine (CPU or VGA)
try with -vo null, if it plays well, then you have slow
VGA card/driver

Workaround: buy a faster card or read this documentation about how to speed up
Also try -framedropB.2.2.� Audio delay/de-sync specific to one or a few filesbad file
Workaround:

-ni or -nobps option
(for non-interleaved or bad files)
and/or
-mc 0
(required for files with badly interleaved VBR audio)
and/or
-delay or +/-
keys at runtime to adjust delay

If none of these help, please upload the file, we'll check (and fix).
your sound card doesn't support 48kHz playback
Workaround: buy a better sound card... or try to decrease fps by 10%
(use -fps 27 for a 30fps movie) or use the resample filter

slow machine (if A-V is not around 0,
and the last number in the status line increasing)
Workaround: -framedropB.2.3.� No sound at allyour file uses an unsupported audio codec
Solution: read the documentation and help us adding support for it
B.2.4.� No picture at all (just plain grey/green window)your file uses an unsupported video codec
Solution: read the documentation and help us adding support for it

auto-selected codec can't decode the file, try to select another using
-vc or -vfm options
B.2.5.� Video-out problems
First note that the options -fs, -vm and
-zoom are not supported by all drivers. Plus, not all
drivers support scaling/zooming in hardware.
OSD/sub flickering.�
x11 driver: sorry, it can't be fixed nowxv driver: use -double option
Green image using mga_vid
(-vo mga / -vo xmga).�

mga_vid misdetected your card's RAM amount, reload it using
mga_ram_size option.

Prev� Up� NextB.1.� Special system/CPU-specific bugs/problems� Home� Appendix� C.� MPlayer skin format