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videodigital:conversion:extraer_audio [2014/08/22 15:17] – [Rotar Vídeo] javivideodigital:conversion:extraer_audio [2019/12/16 12:50] (current) – [Subir Volúmen a un vídeo] jose
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 ====== Extraer el audio de un video ====== ====== Extraer el audio de un video ======
 +  avconv -i video.mp4 -vn -f mp3 audio.mp3
 +
 +Sistema antiguo mas lento que reproduce todo el vídeo:
 +
 # mencoder video.avi -of rawaudio -oac mp3lame -ovc copy -o audio.mp3 # mencoder video.avi -of rawaudio -oac mp3lame -ovc copy -o audio.mp3
  
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   a="./Android/data/org.telegram.messenger/cache/4_49571627767169052.mp4"; ffmpeg -y -i $a -vf "transpose=0" out.mp4; mplayer out.mp4    a="./Android/data/org.telegram.messenger/cache/4_49571627767169052.mp4"; ffmpeg -y -i $a -vf "transpose=0" out.mp4; mplayer out.mp4 
 +  
 +Si ya está rotado, para dejarlo bien:
 +  https://jgiere.de/how-to-rotate-a-video-with-avconv/
 +  avconv -i rotated_video.mp4 -c:a copy video.mp4
  
  
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 ffmpeg -i intermediate_all.mpg -qscale:v 2 output.avi ffmpeg -i intermediate_all.mpg -qscale:v 2 output.avi
 </code> </code>
 +
 +====== Subir Volúmen a un vídeo ======
 +Fuente: https://libav.org/avconv.html#volume
 +  avconv -i video_volumen_flojo.mp4 -vcodec copy -af volume=2 outputfile.mp4
 +
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