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• Batch-converting multimedia-files on Command-Line using find and ffmpeg (Linux)

  11 mai 2018, par free_speech

  For converting more Audio-Files (Let’s say, FLAC to MP3) in the same folder on Command-Line, I formerly used

  find ./ -name "*.flac" -exec ffmpeg -i "{}" -b:a 320k "{}".mp3 \;

  but the problem is that the resulting MP3-Files are named like Artist - Title.flac.mp3.
  This doesn’t even surprise me, but what do I have to type if I want to avoid the ".flac.mp3"-Filenames ?
  The converted Files should be named like Artist - Title.mp3, not this .flac.mp3
  I didn’t yet find a way to solve this problem ...
  Thanks.

• ffmpeg_opt : remove unused variable and undocumented and not working command line...

  31 mai 2014, par Michael Niedermayer

  ffmpeg_opt : remove unused variable and undocumented and not working command line option
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] ffmpeg_opt.c

• ffmpeg crash when input video got no audio line

  16 mai 2020, par sisterbrother

  I got a ffmpeg script which concate 3 videos and works fine when the input video $fp got a audio line ! The first and last input video ($vid1) can be ignored for this topic cause they always have a audio line

  



  The video input $fp instead may sometimes have no audio and cause the script to crash with error :

  



  Stream specifier ':a' in filtergraph description 'then full code comes here' matches no streams.



  



  Related to this link : https://superuser.com/questions/1457683/ffmpeg-ignore-audio-export-if-no-stream-present

  



  You can use this code to archive what I want :

  



  -map "0:v" -map "0:a?"


  



  However in my code the map is already set and iam not really familiar with ffmpeg and my code was mostly from google so iam not really familiar with ffmpeg logics..

  



  How to include this to my current code ? Anybody know how to inlcude this or to fix my code that its go further when input video $fp got no audio line ?

  



  ffmpeg -y -i "$vid1" -i "$fp" -i "$vid1" -stream_loop -1 -i "$audio" -filter_complex \
"[0:v]scale=$cResolution:force_original_aspect_ratio=decrease,pad=$cResolution:(ow-iw)/2:(oh-ih)/2,setsar=1,fps=30,format=yuv420p[v0]; \
 [1:v]scale=$cResolution:force_original_aspect_ratio=decrease,pad=$cResolution:(ow-iw)/2:(oh-ih)/2,setsar=1,fps=30,format=yuv420p[v1]; \
 [2:v]scale=$cResolution:force_original_aspect_ratio=decrease,pad=$cResolution:(ow-iw)/2:(oh-ih)/2,setsar=1,fps=30,format=yuv420p[v2]; \
 [0:a]aformat=sample_rates=48000:channel_layouts=stereo[a0]; \
 [1:a]aformat=sample_rates=48000:channel_layouts=stereo[a1]; \
 [2:a]aformat=sample_rates=48000:channel_layouts=stereo[a2]; \
 [v0][a0][v1][a1][v2][a2]concat=n=3:v=1:a=1[v][a]; \
 [a][3]amix=duration=first[a]; \
 [v]drawtext=text='example..':y=h-line_h-$h3:x=w/30*mod(t\,20):enable='gt(mod(t,$dr2),$Introdr_rounded)'[v]; \
 [v]drawtext=text='example..':y=h-line_h-$hcentral:x=w/20*mod(t\,100):enable='gt(mod(t,$dr2),$Introdr_rounded)'[v]; \
 [v]drawtext=text='example..':y=h-line_h-23:x=w/30*mod(t\,20):enable='gt(mod(t,$dr2),$Introdr_rounded)'[v]" \
 -map "[v]" -map "[a]" -c:v libx264 -crf 22 -preset veryfast -c:a aac -b:a 256k -movflags +faststart "$fp_dest"