PDA

View Full Version : [ubuntu] Remove video and keep audio



FinalShot
September 4th, 2010, 04:46 AM
I'm trying to remove the video from a clip, and keep the audio, currently I'm trying this in OpenShot. But I don't think it's possible.

What programs can do this? If open shot can, how? I tried just rendering out the audio, but I can't not render the video it appears.

andrew.46
September 4th, 2010, 05:03 AM
Hi FinalShot,

FFmpeg can do this quite easily. Just beef up your copy of FFmpeg a little:

HOWTO: Easily enable MP3, MPEG4, AAC, and other restricted encoders in FFmpeg
http://ubuntuforums.org/showthread.php?t=1117283

and then could you post the full command and terminal output of the following command:


ffmpeg -i my_file

substituting 'my_file' for the actual name of your file. The syntax to strip out either video or audio can then be pointed out to you :).

All the best,

Andrew

FinalShot
September 4th, 2010, 05:18 AM
scott@scott-desktop:~/Music$ ffmpeg -i lpp.MP4
Seems stream 1 codec frame rate differs from container frame rate: 50.00 (50/1) -> 25.00 (25/1)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'lpp.MP4':
Duration: 00:03:12.76, start: 0.000000, bitrate: 667 kb/s
Stream #0.0(und): Audio: aac, 44100 Hz, stereo, s16
Stream #0.1(und): Video: h264, yuv420p, 480x264, 25 tbr, 25 tbn, 50 tbc
At least one output file must be specified

Don't know why it says one input file needs to be specified, as I did.

cotcot
September 4th, 2010, 07:34 AM
It is easy with Avidemux.
Open the video in avidemux. Select "encoder" from the audio tab and choose the file format you want in the drop down menu you get when you click the copy button. Click OK. Then click "save", give a filename with the extension of the encoder you have choose ( mysound.mp3 for example) and OK.

andrew.46
September 4th, 2010, 09:08 AM
Hi Finalshot,

A nice easy one :). To get sound alone, which will be aac sound btw:


ffmpeg -i lpp.MP4 -vn -acodec copy lpp_audio_only.mp4

You can alter the filename as you please, technically you could also name the file lpp_audio_only.m4a but this does not really matter.

All the best,

Andrew