This is most likely caused by misbehaving audio output. Especially PulseAudio is known to have bugs which cause such problems. However, you're using the mplayer2 version from experimental which has workarounds for those PulseAudio issues and should work for most people (unfortunately, Debian unstable still ships a version which is known to cause problems for a significant portion of users).
Do you have PulseAudio active on your system? If you do, which audio output API are you using in mplayer2 - ao_pulse or ao_alsa? In the default Debian PulseAudio configuration, applications outputting sound with the ALSA API are redirected to PulseAudio, and this redirection mode is even more buggy than the "native" PulseAudio API (note that this applies only to the default ALSA device; if you configure mplayer2 to use an ALSA hardware device, that works fine and will not be redirected). In any case you can verify that the issue is caused by audio output by using --nosound or --ao=null (the latter is closer to normal playback with audio; it decodes audio but only "outputs" it with a dummy driver). -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org