Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion. Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules. |
12th September 2010, 03:17 | #2 | Link |
Guest
Join Date: Jan 2002
Posts: 21,901
|
Either look at section 9.4 of the BluRay spec or analyze an MPEG2 stream taken from a real title and copy that.
Sorry, but the spec section 9.4 is pretty big and so due to copyright I can't post it here. Maybe someone else has a concise summary for you. |
12th September 2010, 18:13 | #3 | Link |
Special SeeD
Join Date: Nov 2002
Location: Mexico
Posts: 333
|
Thank you Neuron, I found the Cinevision MPEG-2 encoder manual, according to it:
1.-Max B-Frames: 2 2.-Max Bitrate: 40 Mbps (Default 35 Mbps) 3.-Max GOP Length: 1 sec (24/25/30 frames) 4.-MPEG Standard Matrix 5.-Pulldown for 23.976/24 fps sources is not needed Most Disney's trailers encoded using MPEG-2 use similar settings but with 1/2 sec GOPs. I think that HCEnc only support a maximum of 18 frames per gop . |
12th September 2010, 19:35 | #5 | Link |
HCenc author
Join Date: Nov 2003
Location: Netherlands
Posts: 570
|
If you untick the autogop option, you can set the GOPlength to 36 in the Settings1 tab.
Warning, if you're doing HD and use such high GOPlengths you need a lot of memory, the memory allocation by HCenc is proportional by resolution x GOPlength.
__________________
HCenc at: http://hank315.nl |
12th September 2010, 21:06 | #6 | Link |
Big Bit Savings Now !
Join Date: Feb 2007
Location: close to the wall
Posts: 1,545
|
What about the VBV ?
If I try to may out VBV values using TE4XP input windows, I land for SD-DVD-MPEG2 720x576x25i (10.368Mpix/s) at 224KB, HDV-MPEG-2-TS 1440x1080x25i (38.88Mpix/s) at 896KB, (4x DVD-VBV) Full-HD-MPEG-2 1920x1080x25i (51.84Mpix/s) at 1194KB. (5.33x DVD-VBV) Looks like these VBV-values are quite Pixelrate-proportional. Like 0.0216 B/pix, 0.023 B/pix, 0.023 B/pix. Or 0.1728bpp, 0.18bpp, 0.18bpp. TE4's max resolution, bitrate,VBV: 1920x1152 @80Mbps, VBV 1194KB. Not by encode, just by playing with the input fields...
__________________
"To bypass shortcuts and find suffering...is called QUALity" (Die toten Augen von Friedrichshain) "Data reduction ? Yep, Sir. We're that issue working on. Synce invntoin uf lingöage..." Last edited by Emulgator; 12th September 2010 at 21:22. |
12th September 2010, 22:39 | #7 | Link |
HCenc author
Join Date: Nov 2003
Location: Netherlands
Posts: 570
|
This is how HCenc handles VBV buffers:
HCenc code: VBV%limit(1)=1835008 ! main level VBV%limit(2)=7340032 ! high 1440 level VBV%limit(3)=9781248 ! high level This is compliant with H.262 (02/2000) Table E.23 – Main profile @ Main level Table E.24 – Main profile @ High-1440 level Table E.25 – Main profile @ High level These are the same values you mentioned: 1835008/(8*1024) = 224 7340032/(8*1024) = 896 9781248/(8*1024) = 1194
__________________
HCenc at: http://hank315.nl |
13th September 2010, 03:47 | #8 | Link |
Big Bit Savings Now !
Join Date: Feb 2007
Location: close to the wall
Posts: 1,545
|
Very good !
__________________
"To bypass shortcuts and find suffering...is called QUALity" (Die toten Augen von Friedrichshain) "Data reduction ? Yep, Sir. We're that issue working on. Synce invntoin uf lingöage..." |
13th September 2010, 06:48 | #9 | Link |
BluRay Maniac
Join Date: Dec 2005
Posts: 2,419
|
from bd specs:
Max rate: if Main Profile@Main Level maximum is 15mbps for maxrate if Main profile@High level or High-1440 level is used maximum is 40mbps. Buffer size: Main profile@Main level: 229376 [bytes] Main profile@High-1440: 917504 [bytes] Main profile@High level: 1222656 [bytes] Which HC Enc already use, so it's completly BD compatible values |
Thread Tools | Search this Thread |
Display Modes | |
|
|