*.mp4 files sort of stutter. Both sound and video go for half a second then stop momently, go for half a second then stop momently. I'm using Debian Lenny 5 backport completely up to date. The browser plugin does exactly the same. Only relevant looking error message is: ========================================================================== Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family Selected video codec: [ffh264] vfm: ffmpeg (FFmpeg H. 264) ========================================================================== ========================================================================== Opening audio decoder: [faad] AAC (MPEG2/4 Advanced Audio Coding) FAAD: compressed input bitrate missing, assuming 128kbit/ s! AUDIO: 44100 Hz, 2 ch, s16le, 128.0 kbit/9.07% (ratio: 16000- >176400) Selected audio codec: [faad] afm: faad (FAAD AAC (MPEG-2/MPEG-4 Audio) decoder) ========================================================================== AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample) Starting playback... VDec: vo config request - 320 x 240 (preferred colorspace: Planar YV12) VDec: using Planar YV12 as output csp (no 0) Movie-Aspect is undefined - no prescaling applied. VO: [xv] 320x240 => 320x240 Planar YV12 [vm] XF86VM: Selected video mode 640x480 for image size 320x256. Though it often plays perfectly well in other contexts with "assuming 128kbit/s! " Thanks any help.