Hello,
Try the "3gpwiz" package you can get from www.debian-multimedia.org .
I haven't used it as I don't have a mobile phone, but I read the
description and it sounds like it's intended for what you're trying to do.
Hope that helps,
Aidan
Roy Britten wrote:
I've downloaded a couple of Google Tech Talks from Google Video. "file" reports
ISO Media, MPEG v4 system, version 1
mplayer and totem play these files without apparent issue. When I play
them on my nifty new cell phone I get audio but no video. Files that
do play on my cell phone are identified as
ISO Media, MPEG v4 system, version 2
or
ISO Media, MPEG v4 system, 3GPP
so it seems that all that is required is to re-encode the video stream
with the mpeg4v2 codec. RTFMing led me to the following attempt, with
the result suggesting ffmpeg is having difficulty with the audio
stream.
$ ffmpeg -i ParadoxOfChoice.mp4 -f mp4 -vcodec msmpeg4v2 -acodec copy
ParadoxOfChoicev2.mp4
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2007 Fabrice Bellard, et al.
configuration: --enable-gpl --enable-pp --enable-swscaler
--enable-pthreads --enable-libvorbis --enable-libtheora
--enable-libogg --enable-libgsm --enable-dc1394 --disable-debug
--enable-shared --prefix=/usr
libavutil version: 1d.49.3.0
libavcodec version: 1d.51.38.0
libavformat version: 1d.51.10.0
built on Jun 3 2007 20:59:25, gcc: 4.1.3 20070528 (prerelease)
(Ubuntu 4.1.2-9ubuntu2)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'ParadoxOfChoice.mp4':
Duration: 01:04:11.2, start: 0.000000, bitrate: 449 kb/s
Stream #0.0(und): Video: h264, yuv420p, 320x240, 29.97 fps(r)
Stream #0.1(und): Audio: mp4a / 0x6134706D, 44100 Hz, stereo
Output #0, mp4, to 'ParadoxOfChoicev2.mp4':
Stream #0.0: Video: msmpeg4v2, yuv420p, 320x240, q=2-31, 200 kb/s,
29.97 fps(c)
Stream #0.1: Audio: mp4a / 0x6134706D, 44100 Hz, stereo
Stream mapping:
Stream #0.0 -> #0.0
Stream #0.1 -> #0.1
[mp4 @ 0xb7eec5d0]Warning, using MS style video codec tag, the file
may be unplayable!
[mp4 @ 0xb7eec5d0]track 1: codec frame size is not set
Could not write header for output file #0 (incorrect codec parameters ?)
I am completely devoid of clue in these matters -- would someone more
clueful be able to suggest an approach?
Thanks,
Roy.
