B.2. Various A-V sync and other audio problems

B.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 -framedrop

B.2.2. Audio delay/desync specific to one or a few files

• bad 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: -framedrop

B.2.3. No sound at all

• your 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 now

• xv 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.