Saturday, March 8, 2014

Video Codec - Making Big Things, Smaller

A video codecs are used by software to compress audio and video files. Compression is often lossy, meaning reduced quality for reduced size. However people have tried and tested various ways to get smaller files but still have that high quality. 

There are various different codecs that are commonly used today, such as:

AVI, H.264, MPEG, WMV, MP4, AVCHD and MOV 

I tested some of these codecs along with 2 image sequence codecs, PNG and JPEG. Below are the results.




From this information, you can see PNG and JPEG offer excellent quality, however the files sizes are large. MPEG4 has a low file size but the quality suffer extremely, resulting in pixelation. AVI has a smaller file size then PNG and JPEG but the quality is low res. MPEG2 and H.264 have the perfect combination of small file size, rendering time and quality, with H.264 being better for file size at the cost of more rendering time.

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