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=====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

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