Any s/w to cut/add audio files, convert video to audio?

Originally Posted by matrixworld Hi Can you try this code with avconv on the mp4 file again. To save time, just encode 1 minute of it for a test. avconv -ss 0 -t 60 -i ./Mus*/14082012205--.mp4 -vn -c:a libmp3lame -b:a 64k testfile1.mp3 avconv -ss 90 -t 60 -i ./Mus*/14082012205--.mp4 -vn -c:a libmp3lame -b:a 64k testfile2.mp3 sox testfile1.mp3 testfile2.mp3 finalversion.mp3 ----------------- ----------------- If you get any errors from avconv or sox, than it's possible the culprit is the mp4 file. It may have something that avconv doesn't recognize or the file is bad or some unknown reason.

Hi,
The same error this time too with sox. Please see below

ravbholua@ravbholua-Aspire-5315:~$ sox testfile1.mp3 testfile2.mp3 finalversion.mp3
sox FAIL formats: no handler for file extension `mp3'
ravbholua@ravbholua-Aspire-5315:~$

But 1 more thing, as you told it w'd encode for 1 minute but didn't work so. 1st file testfile1.mp3 is for the total time of 27:28 mimutes and the 2nd one testfile2.mp3 is of 26:29 minutes (i.e. 90 sec less than the total) So the -ss option worked but not -t.
so,you say the culprit may be mp4 file!! That may be possible. But before final conclusion please look at the other point also which I mentioned in my last post. Please note as I mentioned there, I had extracte/cut 2 files from an audio file (amr type) each of 1 minute and your command worked fine.The extracted were also amr type. Now when I added with sox it showed the same error.
Then to verify whether it's issue of the amr type files, I converted the 2 amr files to mp3 file and your command seemed to have worked fine. My previous post details this. Now when I combine these 2 mp3, I get the same error. So, another thought goes that sox may also be a culprit. What you think?

Hi

Sorry for the delay in getting back. I think sox doesn't support amr files which is why you get the errors. As I done earlier, I did a test as well with a wav file and got the same error when I tried to convert it to amr. But sox does work with mp3 files.

But 1 more thing, as you told it w'd encode for 1 minute but didn't work so. 1st file testfile1.mp3 is for the total time of 27:28 mimutes and the 2nd one testfile2.mp3 is of 26:29 minutes (i.e. 90 sec less than the total) So the -ss option worked but not -t.

The -t should have worked. It's in the man page for avconv.

-t duration (output) Stop writing the output after its duration reaches duration. duration may be a number in seconds, or in "hh:mm:ss[.xxx]" form.

so,you say the culprit may be mp4 file!! That may be possible. But before final conclusion please look at the other point also which I mentioned in my last post. Please note as I mentioned there, I had extracte/cut 2 files from an audio file (amr type) each of 1 minute and your command worked fine.The extracted were also amr type. Now when I added with sox it showed the same error.

Then it's possible that avconv/ffmpeg is not converting the amr file properly to mp3 format. It's as if the mp3 file is still recognize as amr with a mp3 extension.

If avconv/ffmpeg did converted the amr files properly to mp3 format, the sox command would work. Trust me, I do this all the time because I also convert videos full or partial to mp3 files and I also converted other audio files, if recognized, to mp3 format.

I don't know why avconv/ffmpeg is having a hard time converting your amr files to be recognized as mp3 encoded files so that sox can use it and combine them.

I saw this article online concerning amr files. This could be the reason why avconv/ffmpeg and sox are having trouble with amr files.

http://linux.aldeby.org/post/encode-...in-ubuntu.html

NOTE: This article is dated at 2009. It's possible that the packages it tells you to install might already be available in your repos. I suggest you do an apt-cache search package name before adding the third parties repositories as mentioned in the article.

I suggest you install the libopencore-amrnb0 and libopencore-amrwb0 codecs first because we are only converting amr to mp3. The amrnb and amrwb is needed only for converting audio files to amr format.

After installing the two codecs try again with avconv to convert the amr files to mp3 and sox to combine the mp3 files.

This time avconv should be able to decode the amr files properly because now it has the codecs in its system libraries and it should be able to convert it properly to mp3 format so sox can understand them.

I'll be surprised if it didn't...