convertir un avi pour le N95
Par Hype le mercredi, décembre 17 2008, 23:15 - Ubuntu - Lien permanent
Voila un guide pour diminuer la résolution et la qualité d'une vidéo avi , vers un fichier mp4.
Ici, on va utiliser ffmpeg.
J'ai compilé ffmpeg en suivant la doc
Voila le code à utliser:
ffmpeg -i fichier.avi -f psp -r 29.97 -b 384k -ar 24000 -ab 64k -s 320x240 fichier.mp4
En gros, on passe d'un fichier de 175Mo à 71Mo.
Commentaires
ffmpeg me répond:
FFmpeg version SVN-r19352-4:0.5+svn20090706-2ubuntu2, Copyright (c) 2000-2009 Fabrice Bellard, et al.
configuration: --extra-version=4:0.5+svn20090706-2ubuntu2 --prefix=/usr --enable-avfilter --enable-avfilter-lavf --enable-vdpau --enable-bzlib --enable-libgsm --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-pthreads --enable-zlib --disable-stripping --disable-vhook --enable-gpl --enable-postproc --enable-swscale --enable-x11grab --enable-libdc1394 --extra-cflags=-I/build/buildd/ffmpeg-0.5+svn20090706/debian/include --enable-shared --disable-static
libavutil 49.15. 0 / 49.15. 0
libavcodec 52.20. 0 / 52.20. 0
libavformat 52.31. 0 / 52.31. 0
libavdevice 52. 1. 0 / 52. 1. 0
libavfilter 0. 4. 0 / 0. 4. 0
libswscale 0. 7. 1 / 0. 7. 1
libpostproc 51. 2. 0 / 51. 2. 0
built on Oct 13 2009 22:15:16, gcc: 4.4.1
[NULL @ 0x8d7f9c0]Invalid and inefficient vfw-avi packed B frames detected
Seems stream 0 codec frame rate differs from container frame rate: 23.98 (65535/2733) -> 23.98 (2997/125)
Input #0, avi, from '/home/nicolas/Brazil.avi':
Duration: 02:22:44.31, start: 0.000000, bitrate: 688 kb/s
Stream #0.0: Video: mpeg4, yuv420p, 512x272 [PAR 1:1 DAR 32:17], 23.98 tbr, 23.98 tbn, 23.98 tbc
Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 32 kb/s
Output #0, psp, to '/home/nicolas/Bureau/Brazil.mp4':
Stream #0.0: Video: mpeg4, yuv420p, 320x240 [PAR 24:17 DAR 32:17], q=2-31, 384 kb/s, 90k tbn, 29.97 tbc
Stream #0.1: Audio: 0x0000, 24000 Hz, stereo, s16, 64 kb/s
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
Unsupported codec for output stream #0.1
je ne comprends pas ce qu'il ne vas pas. Un problème de codec?
merci de ton aide.
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