Hello
2013/6/21 ... ... <bersa...@hotmail.fr> > HI, > > I have a basic .avi video. I decode it, reencode it using the same type of > encoder without modifying the decoded data and finally I save it on one > file of my computer. The saved video has a good framerate but it had lost a > lot of quality in the process (it's now with a lot of pixel). I kwon that > the image has been decoded without losing quality. The lost of quality > appeared during the decoding and saving process. > What define the quality of a decoded video ? > > http://en.wikipedia.org/wiki/Peak_signal-to-noise_ratio is one way to evaluate this. Basically, lossy encoding-decoding quickly leads to a quality degradation. Manuel
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