ffmpeg can be used to easily convert audio or video files on any OS – Windows, Linux, or Mac.

Common ffmpeg Parameters

• -i <filename> – PathFilename of source file
• -y – Overwrite the existing output file without prompting
• -an – Disable audio

Video Related ffmpeg Parameters

• -aspect <aspect ratio> – Set Aspect Ratio for the video (4:3, 16:9 or 1.3333, 1.7777)
• -r <rate> – Set frame rate in Hz for the video
• -s <size> – Set video resolution size (Width x Height)
• -sameq – Use same video quality as source

Audio Related ffmpeg Parameters

• -ar <rate> – Set audio sampling rate (in Hz)
• -acodec <codec> – Force audio codec, example mp3
• -vol <volume> – Change audio volume (256=normal)
• -ab <rate> – Set audio bit rate (in bits/s)

Advanced ffmpeg Parameters

• -map_meta_data output file:<input file> – Copy the metadata from input file to converted output file

ffmpeg Command Line Syntax

ffmpeg –i <input filename> <output filename>

ffmpeg Video Examples:

• Converting MOV to FLV using FFMPEG:
  

  ffmpeg -i movie.mov movie.flv

• Converting Mpeg to FLV using FFMPEG:
  

  ffmpeg -i movie.mpeg movie.flv

• Converting AVI to FLV using FFMPEG – convert movie.avi to movie.flv and resize the video resolution to 500×500:
  

  ffmpeg -i movie.avi -s 500×500 movie.flv

• Converting 3GP to FLV using FFMPEG – convert movie.3gp to movie.flv, keep the original file settings and disable the audio content:
  

  ffmpeg -i movie.3gp -sameq -an movie.flv

• Converting MPEG to 3GP using FFMPEG:
  

  ffmpeg -i movie.mpeg -ab 8.85k -acodec libamr_wb -ac 1 -ar 16000 -vcodec h263 -s qcif movie2.3gp

ffmpeg Audio Examples:

• Converting aac to mp3 using FFMPEG with MetaData – convert audio.aac to audio.mp3 with an audio rate of 22.05 Khz and audio BitRate of 32Khz, and will copy the metadata from .aac file to .mp3 file:
  

  ffmpeg -i audio.aac -ar 22050 -ab 32 -map_meta_data audio.mp3:audio.aac audio.mp3

• Converting WMV to MP3 using FFMPEG
  

  ffmpeg -i audio.wmv audio.mp3

• Converting WMV to FLV using FFMPEG – convert audio.wmv to audio.flv, generating only audio content:
  

  ffmpeg -i audio.wmv audio.flv

• Converting AMR to MP3 using FFMPEG – convert audio.amr to audio.mp3, with an audio rate of 22.05 Khz:
  

  ffmpeg -i audio.amr -ar 22050 audio.mp3

• Converting aac to mp3 using FFMPEG – convert audio.aac to audio.mp3, with an audio rate of 22.05 Khz and audio BitRate or 32Khz:
  

  ffmpeg -i audio.aac -ar 22050 -ab 32 audio.mp3

Download ffmpeg.exe for Windows (direct link) (8.5MB)

More:

• Use Google to find FREE music on the web
• Download mp3 (music) files with wget
• How to Convert a Flash Video File (.flv) to MP4 with FFMpeg
• Download the latest FFmpeg Windows Builds (ffmpeg.exe compiled for Windows 32 bit and 64 bit downloads available).