Changes between Version 3 and Version 4 of Postprocessing


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Timestamp:
Jan 17, 2015, 9:05:26 PM (12 years ago)
Author:
Michael Niedermayer
Comment:

pp7 correction

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  • Postprocessing

    v3 v4  
    1010These filters basically smooth away blocking and other artifacts from low quality sources. The further you increment the value of QP, the more intensely it smooths away detail. In particular, the quantization parameter QP regulates how much spatial detail is saved. When QP is very small, almost all that detail is retained. As QP is increased, some of that detail is aggregated so that the bit rate drops – but at the price of some increase in distortion and some loss of quality. So, if you want to lower bit rate, you can do so by lowering QP at a cost of increased distortion.
    1111
    12 USPP and PP7 use encoders, hence, should be used only when one has a powerful CPU. Also, USPP is very slow as compared to other filters. Therefore, for processing large amount of data, FSPP is a good option (It gives good results if parameters are chosen wisely).
     12USPP uses an encoder, hence, should be used only when one has a powerful CPU. Also, USPP is very slow as compared to other filters. Therefore, for processing large amount of data, FSPP is a good option (It gives good results if parameters are chosen wisely).
    1313
    1414Let's consider the example of