Code required to convert mp4 to ogv

[Rytron]

Hi,
I need to convert mp4 to ogv using mencoder or ffmpeg.
I tried oggconvert but it did not work for this particular mp4 file.
Thanks.

[FakeOutdoorsman]

Generally, "ffmpeg input ouput.ogg" will work, but by default, for some unknown reason, ffmpeg will use FLAC instead of vorbis for audio with OGG container, so vorbis must be specified:

ffmpeg -i kideatsdirt.mp4 -acodec vorbis -vcodec libtheora kideatsdirt.ogv

[Rytron]

Generally, "ffmpeg input ouput.ogg" will work, but by default, for some unknown reason, ffmpeg will use FLAC instead of vorbis for audio with OGG container, so vorbis must be specified:

ffmpeg -i kideatsdirt.mp4 -acodec vorbis -vcodec libtheora kideatsdirt.ogv

Output:

:~/Desktop$ ffmpeg -i a.mp4 -acodec vorbis -vcodec libtheora a.ogv
FFmpeg version r11872+debian_3:0.svn20080206-12ubuntu3, Copyright (c) 2000-2008 Fabrice Bellard, et al.
  configuration: --enable-gpl --enable-pp --enable-swscaler --enable-x11grab --prefix=/usr --enable-libgsm --enable-libtheora --enable-libvorbis --enable-pthreads --disable-strip --enable-libfaad --enable-libfaadbin --enable-liba52 --enable-liba52bin --enable-libdc1394 --disable-armv5te --disable-armv6 --disable-altivec --disable-vis --enable-shared --disable-static
  libavutil version: 49.6.0
  libavcodec version: 51.50.0
  libavformat version: 52.7.0
  libavdevice version: 52.0.0
  built on Oct  3 2008 22:40:31, gcc: 4.3.2
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'a.mp4':
  Duration: 00:21:35.1, start: 0.000000, bitrate: 492 kb/s
    Stream #0.0(und): Video: h264, yuv420p, 352x264 [PAR 0:1 DAR 0:1], 25.00 tb(r)
    Stream #0.1(und): Audio: mp3, 22050 Hz, stereo, 128 kb/s
Unable to find a suitable output format for 'a.ogv'

[FakeOutdoorsman]

Curse these multiple ffmpeg versions! Try this:

ffmpeg -i a.mp4 -acodec vorbis -vcodec libtheora -f ogg a.ogv

Your version seems like it doesn't know what ogv is, so it has to be told with "-f ogg". This code will use the default bitrate of 200k, so you may want to increase that with "-b 512k" or whatever. Same for audio, default is 64k, so change it with "-ab 128k".

[Rytron]

Hi,
I tried

ffmpeg -i a.mp4 -acodec vorbis -vcodec libtheora -f ogg a.ogv

but no luck.

Then I tried

ffmpeg -i a.mp4 -b 1024k -acodec vorbis -vcodec libtheora -f ogg a.ogv

Both methods recorded the full length and the sound was perfect. However the video was garbled.

What I did in the end was converted the file using Media Coder in Windows and then converted the file from avi to ogv using OGGConvert in Ubuntu.
Done.

Edit: Granted, I could have converted the mp4 file to an avi file in Ubuntu. It would still be preferable to have a method to do it in Mencoder or FFmpeg though.

[Rodnox]

Using WIndows is no solution for me. Anybody got an update on that?

Need to convert ogv to mpeg or mp4. VLC won't work. Avidemux doesn't recognize ogv files.

i'm stuck.