Bon j'ai trouvé... ce qui se passe, mais pas la parade. voici ce qu'un "vlc -v -v -v" sur un DVD me donne:
[00000310] a52 decoder: A/52 channels:6 samplerate:48000 bitrate:384000 [00000310] main decoder debug: no aout present, spawning one [00000314] main audio output debug: looking for audio output module: 3 candidates [00000314] alsa audio output debug: opening ALSA device `hw:0,0' [00000314] main audio output debug: thread 2936626096 (aout) created at priority 0 (alsa.c:677) [00000314] main audio output debug: using audio output module "alsa" [00000314] main audio output debug: output 's16l' 48000 Hz Stereo frame=1 samples/4 bytes [00000314] main audio output debug: mixer 'fl32' 48000 Hz Stereo frame=1 samples/8 bytes [00000314] main audio output debug: filter(s) 'fl32'->'s16l' 48000 Hz->48000 Hz Stereo->Stereo [00000315] main private debug: looking for audio filter module: 24 candidates [00000315] main private debug: using audio filter module "converter_float" [00000314] main audio output debug: found a filter for the whole conversion [00000314] main audio output debug: looking for audio mixer module: 3 candidates [00000314] main audio output debug: using audio mixer module "float32_mixer" [00000314] main audio output debug: input 'a52 ' 48000 Hz 3F2R/LFE frame=1536 samples/1536 bytes [00000314] main audio output debug: filter(s) 'a52 '->'fl32' 48000 Hz->48000 Hz 3F2R/LFE->Stereo [00000316] main private debug: looking for audio filter module: 24 candidates No accelerated IMDCT transform found [00000316] main private debug: using audio filter module "a52tofloat32" [00000314] main audio output debug: found a filter for the whole conversion [00000314] main audio output debug: filter(s) 'fl32'->'fl32' 52800 Hz->48000 Hz Stereo->Stereo [00000317] main private debug: looking for audio filter module: 24 candidates [00000317] main private debug: using audio filter module "bandlimited_resampler" [00000314] main audio output debug: found a filter for the whole conversion <block> [00000314] main audio output debug: audio output is starving (21398), playing silence [00000314] alsa audio output debug: recovered from buffer underrun </block> Ce block se répétant à l'infini (~3x/sec) a vot'bon coeur, siouplait, sniff