avconvdolphinthunar
I like to use a command like
avconv -i %f -map 0:1 -c:a copy %f.m4a
in the custom actions of Thunar or Dolphin to extract audio from mp4 and flv without transcoding.
But that will output a name that contains the extension of the input file:
From a video "name.mp4" I get an audio file called "name.mp4.m4a".
How to adjust the command so that the output is "name.m4a"?
I am not sure to understand that command. Why do you put -- before the %F?
Try this:
xfce4-terminal -e "parallel avconv -i '{}' -map 0:1 -c:a copy '{}.m4a' ::: %F"
Explanation: As I understand the %F is what Thunar replaces by the files, and parallel uses ::: for the input.
One example in the manpage is, precisely
parallel gzip {} ::: file1 file2
To add to Thunar custom action a command like the one from here
for i in *.mp4; do avconv -i "${i}" -map 0:1 -c:a copy "${i%.mp4}.aac"; done
first add that into an executable script, like
#! /bin/sh -e
for i in *.mp4; do avconv -i "${i}" -map 0:1 -c:a copy "${i%.mp4}.m4a"; done
Make it executable and save it.
In Thunar custom actions add a new entry with the command bash /path/to/the/script %F and the following conditions:
This needs separate custom actions for each file type (because it is limited to mp4 to m4a: make changes accordingly for flv to m4a, webm to ogg, avi to mp3 etc) but has the advantage that the output keeps the exact input name (file.mp4 becomes file.m4a), while with the first command does not (file.mp4 becomes file.mp4.m4a).
Best Answer
You could use the string manipulation features of bash, by running your command through bash:
(I'm assuming that your file manager will pass a filename like
foo bar.mp4as a single argument.)Note that
bashhas both${var%%suffix}and${var%suffix}- the former is greedy (foo.bar.mp4will becomefoowith the first andfoo.barwith the second). In this case, I'm aiming to use the latter, and assuming that%%will be replaced by%by the file manager since%is apparently a special character here.