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ffmpeg [2022/03/11 13:41] – [Images] image ones rjtffmpeg [2023/08/27 20:51] (current) – FFmpeg Explorer rjt
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 Most of the time I just use--- Most of the time I just use---
  
-<code>ffmpeg -i input.ext output.ext</code>+<code>ffmpeg -i [input.ext] [output.ext]</code>
  
 ---and it usually works fine leaving it to just use defaults. ---and it usually works fine leaving it to just use defaults.
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 This gives good results (and a smaller file size) converting MP3 to OGG though: This gives good results (and a smaller file size) converting MP3 to OGG though:
  
-<code>ffmpeg -i input.mp3 -c:a libvorbis -q:a 4 output.ogg</code>+<code>ffmpeg -i [input].mp3 -c:a libvorbis -q:a 4 [output].ogg</code> 
 + 
 +Fuck-off those .WEBMs: 
 + 
 +<code>ffmpeg -i [input].webm -acodec copy -vcodec copy [output].mkv</code>
  
 === Multiple === === Multiple ===
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 For doing a whole directory I use this one-liner I got from Stack Exchange. For doing a whole directory I use this one-liner I got from Stack Exchange.
  
-<code>for i in *.ext; do ffmpeg -i "$i" "${i%.*}.ext"; done</code>+<code>for i in *.[ext]; do ffmpeg -i "$i" "${i%.*}.[ext]"; done</code>
  
 For converting files for my [[m-u-s-u-c]] blog I also strip out the cover images: ''-map a'' tells it to take only the audio stream. For converting files for my [[m-u-s-u-c]] blog I also strip out the cover images: ''-map a'' tells it to take only the audio stream.
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 If you want to put the new videos into a subdirectory, first create it, then simply add it to the output part: If you want to put the new videos into a subdirectory, first create it, then simply add it to the output part:
  
-<code>for i in *.ext; do ffmpeg -i "$i" "directory/${i%.*}.ext"; done</code>+<code>for i in *.[ext]; do ffmpeg -i "$i" "directory/${i%.*}.[ext]"; done</code>
  
-For converting a directory of .FLAC files to .MP3. ''[-qscale:a 0|-b:a 320k]'' is your choice between VBR with the best quality (0) or a CBR of 320k. VBR is generally just as good, though sometimes you need CBR.+For converting a directory of .FLAC files to .MP3. ''[-q:a 0|-b:a 320k]'' is your choice between VBR with the best quality (0) or a CBR of 320k. VBR is generally just as good, though sometimes you need CBR.
  
-<code>for a in ./*.flac; do ffmpeg -i "$a" [-qscale:a 0|-b:a 320k] "${a[@]/%flac/mp3}"; done</code>+<code>for i in *.flac; do ffmpeg -i "$i" [-q:a 0|-b:a 320k] "${i%*}.mp3"; done</code>
  
 ==== Editing ==== ==== Editing ====
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 <code>-filter:v "crop=ih/3*4:ih"</code> <code>-filter:v "crop=ih/3*4:ih"</code>
 +
 +Full example, with copied audio stream:
 +
 +<code>ffmpeg -i [file] -filter:v "crop=ih/3*4:ih" -c:a copy [file]</code>
  
 === Remove Audio === === Remove Audio ===
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 Just had an .AVI file throwing error messages about a busted index. Copying the file seemed to fix it. Just had an .AVI file throwing error messages about a busted index. Copying the file seemed to fix it.
 <code>ffmpeg -i "inputfile.avi" -c:v copy -c:a copy "outputfile.avi"</code> <code>ffmpeg -i "inputfile.avi" -c:v copy -c:a copy "outputfile.avi"</code>
 +
 +===== Frontends =====
 +
 +  * [[https://ffmpeg.lav.io/|FFmpeg Explorer]] - Browser-based GUI with a node-based interface for changing parameters.
  
 ===== See Also ===== ===== See Also =====
ffmpeg.1646966479.txt.gz · Last modified: 2022/03/11 13:41 by rjt