Comments on: bit rate, file size, quality misunderstandings http://rob.opendot.cl/index.php/2009/05/01/bit-rate-file-size-quality-misunderstandings/ stuff about me, what i do and some other hopefully useful stuff Sun, 05 Sep 2010 15:01:25 +0000 hourly 1 http://wordpress.org/?v=3.0.1 By: subik hosting platform » Archive » robert.swain » bit rate, file size, quality misunderstandings http://rob.opendot.cl/index.php/2009/05/01/bit-rate-file-size-quality-misunderstandings/comment-page-1/#comment-15046 subik hosting platform » Archive » robert.swain » bit rate, file size, quality misunderstandings Sun, 22 Aug 2010 19:24:34 +0000 http://rob.opendot.cl/?p=164#comment-15046 [...] robert.swain » bit rate, file size, quality misunderstandings. [...] [...] robert.swain » bit rate, file size, quality misunderstandings. [...]

]]> By: rob http://rob.opendot.cl/index.php/2009/05/01/bit-rate-file-size-quality-misunderstandings/comment-page-1/#comment-14829 rob Sat, 02 May 2009 10:19:53 +0000 http://rob.opendot.cl/?p=164#comment-14829 You could use it for the first pass if you know the value of CRF you will choose will achieve a bit rate close to the one you desire for the targeted bit rate of the second pass. The closer the quantisers are that are used in the first pass, to the actual ones chosen in the second pass, the better the prediction that can be made using that information I think. However, I think I recall that most of the error would be worked around within the first few frames of encoding. I don't think it's particularly beneficial though else it would be recommended by the x264 developers. You could use it for the first pass if you know the value of CRF you will choose will achieve a bit rate close to the one you desire for the targeted bit rate of the second pass. The closer the quantisers are that are used in the first pass, to the actual ones chosen in the second pass, the better the prediction that can be made using that information I think.

However, I think I recall that most of the error would be worked around within the first few frames of encoding. I don’t think it’s particularly beneficial though else it would be recommended by the x264 developers.

]]> By: cynyr http://rob.opendot.cl/index.php/2009/05/01/bit-rate-file-size-quality-misunderstandings/comment-page-1/#comment-14827 cynyr Fri, 01 May 2009 23:46:51 +0000 http://rob.opendot.cl/?p=164#comment-14827 Is there an option to use something like -crf in a 2 pass encode and would there be any benefit to doing an encode that way? Is there an option to use something like -crf in a 2 pass encode and would there be any benefit to doing an encode that way?

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