Hello, NJ:=Nicolas Jauffret NJ> ...snip... NJ> > NJ> >try the conversion without video essence: NJ> >ffmpeg -i foo.avi -acodec mp3 out.mov NJ> NJ> => Readable with mplayer (no sound without "-demuxer lavf" parameter) NJ> => Readable with MacOS QtPlayer 7.1.5 NJ> NJ> So the problem seems well to come from the "copy" codec. very good finding... it should help the developers... NJ> NJ> NJ> >the simpler the problem the better it is to pinpoint a possible bug NJ> > NJ> >could it be that the avi parser (unlike the wav parser) is not NJ> >filling up properly all the required parameters for the mov writer? NJ> > NJ> >you can use mpeg4ip or Dumpster (Apple quicktime downloadable tool) to NJ> >inspect the problematic movie clip NJ> NJ> $ ffmpeg -i foo.%d.jpg -i bar.wav -vcodec mpeg4 -acodec mp3 from_jpg.mov > NJ> /dev/null 2>&1 NJ> $ mp4info from_jpg.mov NJ> mp4info version 1.5.0.1 NJ> Track Type Info NJ> 1 video MPEG-4 Simple @ L1, 8.000 secs, 0 kbps, 640x352 @ 25.000000 NJ> fps NJ> 2 audio .mp3, 8.568 secs, 64 kbps, 48000 Hz NJ> NJ> $ ffmpeg -i foo.%d.jpg -i bar.wav -vcodec mpeg4 -acodec mp3 foo.avi > NJ> /dev/null 2>&1 NJ> $ ffmpeg -i foo.avi -vcodec copy -acodec mp3 from_avi.mov > /dev/null 2>&1 NJ> $ mp4info from_avi.mov NJ> mp4info version 1.5.0.1 NJ> Track Type Info NJ> 1 video FMP4, 8.000 secs, 378 kbps, 0x0 @ 25.000000 fps NJ> 2 audio .mp3, 8.616 secs, 64 kbps, 48000 Hz NJ> NJ> That is strange that the 2 sound streams have not the same duration. NJ> That is also strange that the video tags are different. by the look of it the 'copy' codec facility (both audio and video) needs serious looking/enhancing when the target output format is mov/mp4/3gp NJ> NJ> I installed dumpster but could not extract any information from it just drag and drop the movie clip on the Dumpster icon, you should then be able to navigate the QT atoms structure NJ> NJ> Best regards, NJ> NJ> NJ> Nicolas NJ> PS: Offtopic, mp4info seems to have problems getting information from "avi" NJ> files. NJ> $ mp4info foo.avi ; echo $? NJ> mp4info version 1.5.0.1 NJ> mp4info: can't open foo.avi NJ> 0 NJ> # Of course, the rights are ok for foo.avi NJ> # and "of course", no error code is set by mp4info... hemmm... mp4info ... a tool for gathering info on mp4/mov files ... AVI is a totally different file format, no surprise that it oes not understand it best regards, andrea -- Andrea Barbieri Moving Image Research http://www.movingimageresearch.com/ The Workshop, Hampton Lane, Bristol, BS6 6LE, UK Tel: +44 117 9732200 FAX: +44 117 9732210 PGP ID=0x034DFD5A KeyFingerprint=C168EA9A7189538D214F1281A7529F32034DFD5A