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Old 17th March 2013, 17:41   #1  |  Link
ChiDragon
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x264: suppose I set a bitrate higher than the lossless rate?

What is the resulting video, as compared to the original?

Do I get lossless + overhead? An approximation? Something else entirely I'm not considering?
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Old 17th March 2013, 18:19   #2  |  Link
Brother John
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Visually lossless? Most likely yes. Bitwise lossless: No because the lossy algorithms throw information away, no matter how high you set the bitrate. In practice your encoded video might not even reach the desired bitrate because the encoder was saturated (i.e. couldn’t make it any larger) earlier.
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Old 17th March 2013, 23:40   #3  |  Link
Sagittaire
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Quote:
Originally Posted by Brother John View Post
Visually lossless? Most likely yes. Bitwise lossless: No because the lossy algorithms throw information away, no matter how high you set the bitrate. In practice your encoded video might not even reach the desired bitrate because the encoder was saturated (i.e. couldn’t make it any larger) earlier.
Theoriticaly you can have higher bitrate for lossy codec than lossless codec ...
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Last edited by Sagittaire; 17th March 2013 at 23:46.
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Old 17th March 2013, 23:41   #4  |  Link
Dark Shikari
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You can effectively set a precision higher than lossless by using an absurd CQM (and thus potentially get a higher bitrate). But because of rounding errors in the transforms and so forth, it won't actually be lossless -- just very very close.
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