OK. I just re-rendered the video, using 9600kbps for video and 224 for
audio, and I still get the same result :

mplex -f 8 -V 02.ac3 02.m2v -o 02.mpeg
INFO: [mplex] mplex version 1.8.0 (2.2.4 $Date: 2005/08/28 17:50:54 $)
INFO: [mplex] File 02.ac3 looks like an AC3 Audio stream.
INFO: [mplex] File 02.m2v looks like an MPEG Video stream.
INFO: [mplex] Video stream 0: profile 8 selected - ignoring non-standard 
options!
INFO: [mplex] Found 1 audio streams and 1 video streams
INFO: [mplex] Selecting dvdauthor DVD output profile
INFO: [mplex] Multiplexing video program stream!
INFO: [mplex] Scanning for header info: AC3 Audio stream 00 (02.ac3)
INFO: [mplex] AC3 frame size = 896
INFO: [mplex] AC3 AUDIO STREAM:
INFO: [mplex] Bit rate       :    28672 bytes/sec (224 kbit/sec)
INFO: [mplex] Frequency      :     48000 Hz
INFO: [mplex] Scanning for header info: Video stream e0 (02.m2v) 
INFO: [mplex] VIDEO STREAM: e0
INFO: [mplex] Frame width     : 720
INFO: [mplex] Frame height    : 576
INFO: [mplex] Aspect ratio    : 4:3 display
INFO: [mplex] Picture rate    : 25.000 frames/sec
INFO: [mplex] Bit rate        : 9400000 bits/sec
INFO: [mplex] Vbv buffer size : 229376 bytes
INFO: [mplex] CSPF            : 0
INFO: [mplex] SYSTEMS/PROGRAM stream:
INFO: [mplex] rough-guess multiplexed stream data rate    : 9828000
INFO: [mplex] target data-rate specified               : 10080000
INFO: [mplex] Setting specified specified data rate: 10080000
INFO: [mplex] Run-in Sectors = 89 Video delay = 13019 Audio delay = 16619
INFO: [mplex] New sequence commences...
INFO: [mplex] Audio bd: buf=      0 frame=000000 sector=00000000
INFO: [mplex] Video e0: buf=      0 frame=000000 sector=00000000
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=477476 
required(DTS)=477419
++ WARN: [mplex] Audio bd: buf=  11869 frame=000173 sector=00000077
++ WARN: [mplex] Video e0: buf=  80837 frame=000129 sector=00000447
INFO: [mplex] STREAM bd completed @ frame 17656.
INFO: [mplex] Scanned to end AU 14125
INFO: [mplex] STREAM e0 completed @ frame 14125.
INFO: [mplex] Multiplex completion at SCR=50848768.
INFO: [mplex] Audio bd: buf=   5376 frame=000003 sector=00007848
INFO: [mplex] Video e0: buf= 191896 frame=014125 sector=00316091
INFO: [mplex] AUDIO_STATISTICS: bd
INFO: [mplex] Audio stream length 15820672 bytes.
INFO: [mplex] Frames         :    17657
INFO: [mplex] BUFFERING min 35 Buf max 9667
INFO: [mplex] VIDEO_STATISTICS: e0
INFO: [mplex] Video Stream length:   639098837 bytes
INFO: [mplex] Sequence headers:      942
INFO: [mplex] Sequence ends   :        1
INFO: [mplex] No. Pictures    :    14126
INFO: [mplex] No. Groups      :      942
INFO: [mplex] No. I Frames    :      942 avg. size 67641 bytes
INFO: [mplex] No. P Frames    :    13184 avg. size 43642 bytes
INFO: [mplex] No. B Frames    :        0 avg. size     0 bytes
INFO: [mplex] Average bit-rate :  9048400 bits/sec
INFO: [mplex] Peak bit-rate    :  9568000  bits/sec
INFO: [mplex] BUFFERING min 15 Buf max 235543
**ERROR: [mplex] MUX STATUS: Frame data under-runs detected!

I'll rencode using 9000kbps for the video bitrate, just to be sure. But
that's strange... :-/

Nicolas.


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