Changes between Version 1 and Version 2 of Encode/VP8


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Timestamp:
Feb 24, 2013, 9:37:47 PM (5 years ago)
Author:
slhck
Comment:

it actually uses both, silly me

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  • Encode/VP8

    v1 v2  
    1919== Variable Bitrate == 
    2020 
    21 libvpx offers two different variable bitrate modes, but FFmpeg (at the moment) only uses the one called "Constant Quality" (CQ).  Like in the x264 encoder (for H.264 video), a constant quality mode will ensure that every frame gets the number of bits it deserves to achieve a certain quality level, rather than forcing the stream to have an average bit rate. This results in overall better quality and should be the default method of encoding video with libvpx. 
     21libvpx offers two different variable bitrate modes, which are very similar.  Like in the x264 encoder (for H.264 video), a constant quality mode will ensure that every frame gets the number of bits it deserves to achieve a certain quality level, rather than forcing the stream to have an average bit rate. This results in overall better quality and should be the default method of encoding video with libvpx. 
    2222 
    2323There are four important parameters for encoding VBR with libvpx, all of which are optional, but there are some caveats: