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16th December 2020, 23:20 | #30261 | Link | |
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Maybe that specific source? My scores were the averages across several discs. But, I don't think any of the individual scores that were used were that far off the average. Last edited by jdobbs; 16th December 2020 at 23:31. |
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17th December 2020, 11:01 | #30262 | Link |
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In this Wiki article 15% bitrate savings are mentioned, so yes, it must be the HW ... it does not explain 38% difference though ...
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17th December 2020, 11:36 | #30263 | Link |
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@jdobbs, cartman0208:
It seems that the discrepancy is partially attributed to the GOP size. For the tests I set the vKeyint in the alternate.txt to 48, and the x264 encoded accordingly. Apparently the --bluray in the NVEncC commandline forced a shorter GOP of 30 which seems to have penalized the NVEncC. Encoding at same GOP of 24 (default) the difference of the filesize between x264 and NVEncC for similar PSNR (or SSIM) becomes less: about 25..30% rather than the 38% as before. Last edited by Sharc; 18th December 2020 at 13:34. |
19th December 2020, 14:39 | #30264 | Link | |
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Redoing the test for GOP 24 (blu-ray compliant, BD-RB default) reduced the filesize difference to 20 ....30%. Adding --lookahead 24 to the NVEncC commandline brought another improvement for NVEncC, so eventually I ended up with about 12% ... 16% file size penalty for NVEncC for 'equal' PSNR/SSIM in my tests. Example (for my 1050ti): x264 CRF=22.0, PSNR=44.82dB, SSIM=82.803, filesize=100% (reference filesize) NVEncC CQM=25.8, PSNR=44.95dB, SSIM=82.613, filesize=126% NVEncC CQM=25.5, PSNR=44.97dB, SSIM=82.756, filesize=115%, with '--lookahead 24' added to the NVEncC commandline. |
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19th December 2020, 16:49 | #30265 | Link |
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Has anyone had any luck using the NVENCC command line options for iVTC? In BD Rebuilder, I currently force AVS input when doing iVTC (which means the encode is roughly the same speed as X264). I thought I'd try using the vpp options in NVENCC and see how well they work. When I try "--vpp-decimate cycle=5" for encoding on a source that uses the duplicated frame method -- I get a terrible jumpiness (compared to an AVS using tivtc, for example). VPP doesn't seem to find the duplicated frame very well at all.
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19th December 2020, 18:15 | #30267 | Link |
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If trying to convert from NTSC to PAL, yes. These are sources that were originally FILM (virtually everything falls into that category) that were converted to NTSC for broadcast. Many TV shows (especially older ones) were originally shot at 24fps and then telecined. I'm trying to get them back to FILM format.
Last edited by jdobbs; 19th December 2020 at 18:19. |
19th December 2020, 22:51 | #30268 | Link | |
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a) field matching -> restores the progressive film frames b) decimation -> removes the duplicates In avisynth it is Code:
TFM() TDecimate() I didn't try though, it's just my interpretation. Edit: Oh, there seems to be an IVTC method which does not require field matching: https://forum.doom9.org/showthread.php?t=176657 Last edited by Sharc; 20th December 2020 at 09:46. |
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23rd December 2020, 00:30 | #30269 | Link |
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MKV import it creates a pseudo disc ?? it also converts .mkv to .m2ts without re encoding ?? does this mean i can burn the pseudo to a disc and it will play without spending the time to re encode it first ???
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23rd December 2020, 10:11 | #30270 | Link | |
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If the size fits to a disc you can directly burn this pseudo structure of the IMPORTS folder to a disc without re-encoding, and if you are lucky it's even compliant - depending on the streams in the .mkv source. However, to ensure that the final result is fully blu-ray compliant (size and format wise) a subsequent re-encoding step is normally required which involves much more (i.e. re-encoding the streams as necessary) than just packing everything into an .m2ts container. Last edited by Sharc; 23rd December 2020 at 10:13. |
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23rd December 2020, 15:48 | #30271 | Link | |
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24th December 2020, 00:38 | #30272 | Link |
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As we approach the twelfth anniversary of this thread and the "beta" of BD-RB, I would like to extend my best wishes to jdobbs & family for a Merry Christmas and a Happy New Year!
I think the first movie I tried w/BD-RB might have been Live Free or Die Hard and even though the conversion was at a measly 3.5KBps or something bitrate, it turned-out awesome and looks great to this day. Of course, in 2008 this was big stuff as we were sorta feeling our way around in those days. But I digress... see you in the New Year. |
31st December 2020, 23:49 | #30276 | Link |
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hmm ok did and encode to bd25 with Nvencc used setting highest (very slow), i see from lastcmd.txt it is using --vbr why are we not using --vbrhq which then also enables multipass ?? also lookahead is not enabled ??
--codec h264 --preset quality --bluray --qp-min 0 --vbr 17504 --aq-temporal --keyfile "G:\BD REBUILDER\WORKFILES\VID_00351.CHP" --sar 1:1 --aud --pic-struct --vbv-bufsize 30000 --max-bitrate 35000 --gop-len 24 -o yet setting "high quality (default)" has --multipass 2pass full enabled --codec h264 --preset default --bluray --qp-min 0 --multipass 2pass-full --vbr 17504 --aq-temporal --keyfile "G:\BD REBUILDER\WORKFILES\VID_00351.CHP" --sar 1:1 --aud --pic-struct --vbv-bufsize 30000 --max-bitrate 35000 --gop-len 24 -o Last edited by Mike-uk; 1st January 2021 at 00:06. |
1st January 2021, 00:02 | #30277 | Link | |
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All of the BD-RB settings are based on actual testing and output results -- not "what it should do". Last edited by jdobbs; 1st January 2021 at 00:12. |
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4th January 2021, 19:22 | #30279 | Link |
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hey JD, I'm using the Edit and blanking feature to remove various screens for Full BD / UHD backup (no re-encode) but the smaller ones around 1Mb or smaller do not show up for blanking. Is there any way to get all the M2TS files to show up so I can choose to blank them?
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5th January 2021, 22:13 | #30280 | Link | |
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MIN_M2TS_SIZE=0 MIN_PLAYLIST_MINS=0 |
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