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## ffmpeg.md

      
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                superhg2012
                / ffmpeg.md
            
            
              Created
              July 7, 2019 06:55
                — forked from protrolium/ffmpeg.md
            
              
                using ffmpeg to extract audio from video files
              
          
    ffmpeg

Converting Audio into Different Formats / Sample Rates

Minimal example: transcode from MP3 to WMA:

ffmpeg -i input.mp3 output.wma
You can get the list of supported formats with:

ffmpeg -formats
Convert WAV to MP3, mix down to mono (use 1 audio channel), set bit rate to 64 kbps and  sample rate to 22050 Hz:


## ffmpeg-convert-mp3-to-wave
ffmpeg -i input.mp3 -acodec pcm_s16le -ac 1 -ar 16000 output.wav

# To convert all mp3 files in a directory in Linux:

for f in *.mp3; do ffmpeg -i "$f" -acodec pcm_s16le -ac 1 -ar 16000 "${f%.mp3}.wav"; done

# Or Windows:

for /r %i in (*) do ffmpeg -i %i -acodec pcm_s16le -ac 1 -ar 16000 %i.wav
	ffmpeg -i input.mp3 -acodec pcm_s16le -ac 1 -ar 16000 output.wav

	# To convert all mp3 files in a directory in Linux:

	for f in *.mp3; do ffmpeg -i "$f" -acodec pcm_s16le -ac 1 -ar 16000 "${f%.mp3}.wav"; done

	# Or Windows:

	for /r %i in (*) do ffmpeg -i %i -acodec pcm_s16le -ac 1 -ar 16000 %i.wav