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video_tips [2017/03/11 18:22]
video_tips [2019/07/16 20:31] (current)
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 +;#;
 +[[developer_resources|Back to Developers Page]]
 +;#;
 +=====Some tips about video files=====
  
 +Usually, I have to deal with video files to make some tests, so I have decided to create this space to save all those little tips I need from time to time.
 +
 +====How to merge many video files together?​====
 +
 +First at all, install mencoder:
 +    * sudo apt-get install mencoder
 +
 +The command:
 +    * mencoder -oac copy -ovc copy test_1.avi test_2.avi testN.avi -o completeFile.avi
 +
 +====How to convert an AVI file to FLV?====
 +
 +I found a great post right here: http://​forums.liveleak.com/​showthread.php?​t=1716
 +
 +The short version:
 +
 +The command:
 +
 +    * ffmpeg -i input.avi -b 2028k -s 640x480 -r 30 -acodec copy output.flv
 +
 +Little explanation:​
 +
 +   ​ffmpeg:​ the program
 +   -i input.avi: the input file
 +   -b 2028k: the output bitrate
 +   -s 640x480: the output resolution
 +   -r 30: the output frames per second
 +   ​-acodec copy: the output audio codec
 +   ​output.flv:​ the output file
 +
 +====How to extract audio from a video file?====
 +
 +The command:
 +    * ffmpeg -i example.avi -vn -acodec pcm_s16le -ar 44100 -ac 2 example.wav
 +
 +====How to remove audio from a video file?====
 +
 +The command:
 +    * ffmpeg -i input.flv -an -vcodec copy output.flv
 +
 +Where output.flv is the video without sound.
 +
 +====How to mix a video with a sound file?====
 +
 +The command:
 +    * ffmpeg -vcodec copy -i images.mpg -i sound.mp3 output.mpg
 +
 +====Additional tips====
 +
 +http://​www.catswhocode.com/​blog/​19-ffmpeg-commands-for-all-needs
 +
 +;#;
 +[[developer_resources|Back to Developers Page]]
 +;#;