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12th May 2011, 18:55 | #22 | Link | |
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Answer- it does not give real advantage in case of BD production and even if it's free it does not change fact that it misses many features (+ it's relatively slow), which are essential for authoring studios, so there is no that big interest in using it (before even judging quality). If x264 would have special high bitrate mode these artefacts would not be there- it's way good enough to avoid them, but it needs some optimisation for high bitrates. Yes- gradients, low level details areas are week points of x264. Andrew Last edited by kolak; 12th May 2011 at 19:07. |
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17th May 2011, 20:16 | #23 | Link |
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I've done yet another try: quite grainy film source encoded at 35Mbit (38Mbit max), 2 pass BD pressets, with very slow first pass. It was done at about 5fps (on 12 core machine with HT at 99% of all cores) and does look very good, except exactly the same problem as mp3dom described.
Whole frame will look very good, but it has places where details gets flatten and changed into blocks- there is really no reason for this at 35Mbs. There is also still big gap in quality between B and rest of frames (I assume this can be tweaked). This was not anime, but grainy film source. Andrew Last edited by kolak; 18th May 2011 at 16:36. |
18th May 2011, 13:59 | #24 | Link | |||
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Last edited by mp3dom; 18th May 2011 at 14:13. |
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18th May 2011, 14:43 | #25 | Link | |
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Scaling from 0->100 and somewhere not losing efficiency inside the same codebase is nothing easy and seeing that x264 was mostly optimized visually with low bitrate and the hell with freedom from all restrictions in mind over the years i can follow your and kolaks problems on the blu-ray situation somewhat, and you really tried every possible combination of x264 settings that have todo with compression for quality and you don't get happy @ least with how it looks @ high bitrate i mean their are a lot of options and ranges for possible tweaking high bitrate from the defaults visually ?
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all my compares are riddles so please try to decipher them yourselves :) It is about Time Join the Revolution NOW before it is to Late ! http://forum.doom9.org/showthread.php?t=168004 Last edited by CruNcher; 18th May 2011 at 15:09. |
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18th May 2011, 16:28 | #27 | Link |
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mp3dom- there are some improvements coming to CC-HDe.
There is quite a lot to improve, but it was all suspended due to MVC encoder. The best is to have Blu-code, CC-HDe and x264 Very stable grain and overall image look is very strong point of Blu-code. I wish x264 gets tweaked for high bitrates encodes. Andrew |
19th May 2011, 19:03 | #29 | Link | |
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Or better just give a few meg of the encoded stream containing problem frames. No more then 200 :-) - then evaluation version could be used to check it. If there is problem with encoding, it will be evident, doesn't matter what's the nature - too high quantizers (not sure) or some problems with intra predicted blocks in P-frame (more likely) |
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