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--- ubuntu:sound:convert_mp4_to_mp3 [2022/09/19 10:58] – peter
+++ ubuntu:sound:convert_mp4_to_mp3 [2024/12/08 18:01] (current) – peter
@@ Line 8: / Line 8: @@
 <code bash>
+ffmpeg -i "x.mp4" -b:a 320k -vn x.mp3
 ffmpeg -i "x.mp4" -b:a 192k -vn x.mp3
 </code>
+----
+<code bash>
+ffmpeg -i in.mp4 -q:a 0 -map a out.mp3
+</code>
+<WRAP info>
+**NOTE:**  The **q** option can only be used with libmp3lame and corresponds to the LAME -V option.
+See [[https://trac.ffmpeg.org/wiki/Encode/MP3|Encoding VBR (Variable Bit Rate) mp3 audio]].
+</WRAP>
+----
+===== Converts every MP4 in the current directory to an MP3. =====
+Preserves the original name of the file.
+<code bash>
+for f in *.mp4; do ffmpeg -i "$f" -vn -c:a libmp3lame -ar 44100 -ac 2 -ab 192k "${f/%mp4/mp3}"; done
+</code>
+<WRAP info>
+**NOTE:** To use it for an flv or avi or whatever, simply change both instances of mp4.
+</WRAP>
+----
+===== References =====
+https://trac.ffmpeg.org/wiki/Encode/MP3