On Mon, May 28, 2012 at 3:00 PM, <pulseaudio-discuss-request at lists.freedesktop.org> wrote: > The log just shows that the latency estimation that PulseAudio provides to > VLC are unstable, showing a steep increase at nominal playback speed. > If it keeps on happening all the time, something is clearly broken. It > could be the audio hardware, the computer clock, the audio driver, > PulseAudio or VLC. Being unable to reproduce your problem, I would not > hazard a guess. I've now confirmed identical behavior with mplayer (using SMPlayer as front end). It also happens with system sounds as well intermittently. > There are however a few things you can try: > - Configure PulseAudio to use the same sample rate as VLC does with the > "pure" ALSA output. If that works, the problem is probably with the audio > hardware or the audio driver. Done. Both are currently set to sample at 48000. No improvement. > - Try with all power management *disabled* and no other active > application, to rule out scheduling problems. No other applications are running. No change in symptoms. I believe power management is disabled, but will confirm again. > - Check that your computer clock is running properly, with reasonable > precision. Confirmed to external clock over 1h, no drift noted. > - Try with other file formats and codecs to rule out a VLC timestamping > bug or corrupt input file. Confirmed with multiple .avi, .mkv, .mp4, multiple files tested. Many thanks for the response. I'm more than happy to post logs/files as needed to help someone more familiar with this issue debug the problem. D
