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. |
23rd March 2005, 18:27 | #1 | Link |
Registered User
Join Date: Dec 2004
Posts: 10
|
Nero Digital AVC archival quality settings
Hello all,
I'm tried and tested many a codec and am really happy with ND AVC. I seem to get an overall better quality picture than even high bitrate MPEG-2 (DVD max settings in TMPenc) when working from SDI imported video from analog sources. I am trying to find settings that will provide archival type quality for my conversions. My main problem is that in darker areas of the picture I am getting blocking between different gradiations of black and can't seem to get rid of them. All the material has been corrected for the lumiance levels, but it is still an issue. I am using 704x420 4:3 anamorphic resolution with bitrates up to 3kbps for the video. What settings are reccommended for the highest quality for archival sources? Also, a quick side question, I can import an .avs scrip in to recode, but how do I get it to find an audio file as well to mux or convert/mux into the .mp4 stream? Thanks all in advance for the help. peace, chris |
24th March 2005, 12:09 | #3 | Link |
Registered User
Join Date: Nov 2001
Location: Tampere, Finland
Posts: 618
|
too complicated.
avisource("video.avi") audiodub(wavsource("video.wav"))
__________________
A/V moderator @ hydrogenaudio.org My weird old sh*t: http://www.nic.fi/~lhahne/ http://last.fm/user/Latexxx/ |
24th March 2005, 12:40 | #4 | Link | |
Registered User
Join Date: Mar 2002
Posts: 486
|
Re: Nero Digital AVC archival quality settings
Quote:
|
|
25th March 2005, 11:00 | #5 | Link | |
Life's clearer in 4K UHD
Join Date: Jun 2003
Location: Notts, UK
Posts: 12,219
|
Quote:
All Mpeg2/DVD sources contains either 720x480 (for NTSC) or 720x576 (for PAL) for both 4:3 and 16:9 anamorphic DVD's. Reducing the vertical resolution looses overall definition, especially if you are intending to view your archived content via a large display screen... at some time! Cheers
__________________
| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 | My Network Layout & A/V Gear |
Last edited by SeeMoreDigital; 25th March 2005 at 13:05. |
|
25th March 2005, 11:47 | #6 | Link | ||
Registered User
Join Date: Nov 2001
Location: Tampere, Finland
Posts: 618
|
Re: Re: Nero Digital AVC archival quality settings
Quote:
Quote:
__________________
A/V moderator @ hydrogenaudio.org My weird old sh*t: http://www.nic.fi/~lhahne/ http://last.fm/user/Latexxx/ |
||
25th March 2005, 12:08 | #7 | Link | |
Life's clearer in 4K UHD
Join Date: Jun 2003
Location: Notts, UK
Posts: 12,219
|
Quote:
I have access to SDI equipment too (most of it is at work) and regually convert analogue 4:3 content to digital 16:9 anamorphic. But what sort of SDI equipment is Chris using... does it have scaling! Even a camcorder with DV in/out can convert analogue to digital on-the-fly and re-scale the video to 480/576 vertical Cheers
__________________
| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 | My Network Layout & A/V Gear |
Last edited by SeeMoreDigital; 25th March 2005 at 13:04. |
|
25th March 2005, 12:58 | #8 | Link | |
Registered User
Join Date: Dec 2004
Posts: 10
|
Re: Re: Re: Re: Nero Digital AVC archival quality settings
Quote:
After cropping off the scan lines around the frame that are distored due to the tape sync signal, and filtering for noise, using IVTC, decimation (if its not a mixed source), and deinterlacing when needed. I lanczos resize back up to 704x480 for archiving. So I am keeping the same resolution as the source for the archive. My big problem is that even with high bitrates (3mbps) I have been unable so far to eliminate the blockiness in deep black gradiations, I am running some test encodes right now with some suggestions to turn off weighted prediction and b-frames, but it'll be a few more hours before I can see the results. The motion quality and overall quality of the video in AVC is superior to MPEG-2 encodes I have done save for this issue, that is why I am trying to find settings that work for archival purposes, to keep these in the best possible format for the future. I understand I could save them as Huffy avis but I can't afford that type of storage cost. I tried XviD quant 2 with the 6of9 matrix and the problem was worse there. On a normal montior or projection screen, the problem is not visible much, but on my TFT LCD it is an issue, with LCD screens getting larger and more prominant in the market I want to ensure that I do not encode faults in to the archive. Hope that helps give you an idea of the issue. peace, chris |
|
25th March 2005, 13:20 | #9 | Link |
Life's clearer in 4K UHD
Join Date: Jun 2003
Location: Notts, UK
Posts: 12,219
|
That's more like it...
Your doing much the same as I do when converting analogue to Mpeg2 (or DVPAL 5:1 compression 4:2:0) via SDI. Where you confused me is with your 704x420 remark! Now it sounds to me like you're in an NTSC land. As a matter of interest, can you confirm whether any of your analogue sources contain mattes above and below your image? Cheers
__________________
| I've been testing hardware media playback devices and software A/V encoders and decoders since 2001 | My Network Layout & A/V Gear |
|
25th March 2005, 13:29 | #12 | Link |
Registered User
Join Date: Dec 2004
Posts: 10
|
one other note, most of the video I am working with is archival tapes from the band Toad The Wet Sprocket. With the help of the lead singer and several others connected with the band I'm converting them for the internet archive www.archive.org . So you can check out the fruits of this labor once I get done!
Then for my own use I'm going to do some laserdisc conversions that aren't on DVD (When the Wind Blows, british cartoon about nuclear war),(The Fountain Head),(Roger Waters Radio KAOS) etc. peace, chris |
Thread Tools | Search this Thread |
Display Modes | |
|
|