Compressing an AVI file

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Sakthivel 2012-10-16

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评论： Veronika Mazulina 2020-3-31

Hi I would like to compress an avi file created from MATLAB. I have to extract audio samples and video frames seperately, process them and synchronize them . I have processed the video frames using VideoWriter Command. The resulting file was 175 mb in an uncompressed format which runs less than a minute.Can you please let me know if there are any commands to compress the AVI file, or convert it to MPG ?

Thanks in advance, Sakthivel.K

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Matt Kindig 2012-10-16

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You can specify a codec (compression algorithm) in avifile, to compress it to an avi, provided you have Windows. See :

doc avifile

You also might want to look into VirtualDub-- it's an open source program that can read and compress lots of different AVI codecs.

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Answer 1

Guillaume 2015-4-20

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According to VideoWriter docs, the default codec, if you don't specify a profile is an MJPEG avi. Therefore, you must have specifically asked for an uncompressed AVI when you've created your videowriter.

Get rid of the profile argument, or choose a compressed profile in your call to VideoWriter