Changes between Version 7 and Version 8 of Encode/AV1


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Timestamp:
Jun 9, 2018, 12:42:50 PM (5 months ago)
Author:
slhck
Comment:

slight rewording due to new structure

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  • Encode/AV1

    v7 v8  
    2727= Constant Quality = 
    2828 
    29 In addition to the default VBR mode, there's a constant quality (CQ) mode (like CRF in x264 and x265) which will ensure that every frame gets the number of bits it deserves to achieve a certain (perceptual) quality level, rather than encoding each frame to meet a bit rate target. This results in better overall quality. If there isn't a fixed target file size, this should be your method of choice. 
     29libaom-av1 has a constant quality (CQ) mode (like CRF in x264 and x265) which will ensure that every frame gets the number of bits it deserves to achieve a certain (perceptual) quality level, rather than encoding each frame to meet a bit rate target. This results in better overall quality. 
     30 
     31If you do not need to achieve a fixed target file size, this should be your method of choice. 
    3032 
    3133{{{ 
     
    3739= Two-Pass = 
    3840 
    39 In order to create more efficient encodes when a particular target bitrate should be reached you should choose two-pass encoding. For two-pass, you need to run `ffmpeg` twice, with almost the same settings, except for: 
     41In order to create more efficient encodes when a particular target bitrate should be reached, you should choose two-pass encoding. For two-pass, you need to run `ffmpeg` twice, with almost the same settings, except for: 
    4042 
    4143* In pass 1 and 2, use the `-pass 1` and `-pass 2` options, respectively. 
     
    6163= Average Bitrate (ABR) = 
    6264 
    63 libaom-av1 offers a simple "Average Bitrate" or "Target Bitrate" mode. In this mode, it will simply try to reach the specified bit rate on average, e.g. 2 MBit/s. 
     65libaom-av1 also offers a simple "Average Bitrate" or "Target Bitrate" mode. In this mode, it will simply try to reach the specified bit rate on average, e.g. 2 MBit/s. 
    6466 
    6567{{{