Esto es lo que obtengo al ejecutar en terminal:
Playing /media/hdc1/Descargas Emule/Incoming/******
AVI file format detected.
VIDEO: [XVID] 560x414 12bpp 25.000 fps 1946.8 kbps (237.6 kbyte/s)
Clip info:
Software: VirtualDubMod 1.5.10.2 (build 2540/release)
SUB: Detected subtitle file format: subviewer
SUB: Read 225 subtitles.
SUB: Adjusted 35 subtitle(s).
SUB: Added subtitle file (1): /media/hdc1/Descargas Emule/Incoming/******
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
==========================================================================
==========================================================================
Opening audio decoder: [mp3lib] MPEG layer-2, layer-3
AUDIO: 48000 Hz, 2 ch, s16le, 128.0 kbit/8.33% (ratio: 16000->192000)
Selected audio codec: [mp3] afm: mp3lib (mp3lib MPEG layer-2, layer-3)
==========================================================================
AO: [alsa] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
VDec: vo config request - 560 x 414 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.35:1 - prescaling to correct movie aspect.
VO: [xv] 560x414 => 560x414 Planar YV12
A: 18.0 V: 18.0 A-V: 0.062 ct: 0.007 450/450 10% 8% 0.8% 1 0
Playing/media/hdc1/Descargas/Emule/Incoming/******
AVI file format detected.
AVI: invalid audio stream ID: 0 - ignoring (nosound)
VIDEO: [XVID] 560x414 12bpp 25.000 fps 1946.8 kbps (237.6 kbyte/s)
Clip info:
Software: VirtualDubMod 1.5.10.2 (build 2540/release)
SUB: Detected subtitle file format: subviewer
SUB: Read 225 subtitles.
SUB: Adjusted 35 subtitle(s).
SUB: Added subtitle file (1): /media/hdc1/Descargas Emule/Incoming/******
==========================================================================
Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family
Selected video codec: [ffodivx] vfm: ffmpeg (FFmpeg MPEG-4)
==========================================================================
Audio: no sound
Starting playback...
VDec: vo config request - 560 x 414 (preferred colorspace: Planar YV12)
VDec: using Planar YV12 as output csp (no 0)
Movie-Aspect is 1.35:1 - prescaling to correct movie aspect.
VO: [xv] 560x414 => 560x414 Planar YV12
Como se ve, al cargar la primera pista de audio no hay problema pero en el momento en que cambio a la segunda me pone "no sound".