Changes between Version 12 and Version 13 of Postprocessing


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Timestamp:
Feb 10, 2015, 12:24:20 AM (4 years ago)
Author:
llogan
Comment:

provided links to each filter's docs

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  • Postprocessing

    v12 v13  
    55FFmpeg includes the following post-processing filters:
    66
    7 * {{{spp}}} - Simple Postprocessing
    8 * {{{uspp}}} - Ultra Simple or Slow Postprocessing
    9 * {{{fspp}}} - Fast Simple Postprocessing
    10 * {{{pp7}}} - Postprocessing 7
    11 * {{{pp}}} - libpostproc wrapper
     7* [https://ffmpeg.org/ffmpeg-filters.html#spp spp] - Simple Postprocessing
     8* [https://ffmpeg.org/ffmpeg-filters.html#uspp uspp] - Ultra Simple or Slow Postprocessing
     9* [https://ffmpeg.org/ffmpeg-filters.html#fspp fspp] - Fast Simple Postprocessing
     10* [https://ffmpeg.org/ffmpeg-filters.html#pp7 pp7] - Postprocessing 7
     11* [https://ffmpeg.org/ffmpeg-filters.html#pp pp] - libpostproc wrapper
    1212
    1313These filters basically smooth away blocking and other artifacts from low quality sources. The QP parameter is chosen by the encoder used to create the video, VCD, DVD, etc. Lower QP for the encoder results in higher bitrate and higher quality encoding. If no "QP" parameter is specified by the user to postprocessing filter uses the one that is stored in the encoded file for the specific area. In particular, the quantization parameter QP regulates how much spatial detail is saved. When QP is very small, almost all 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.