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Converting VHS to digital. |
Posted by: Glastontown - 2020-08-18, 09:09 AM - Forum: General technical discussions
- Replies (1)
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I have a question.
Complete novice here, so please excuse my blundering description of what's going on.
I live in a Region 1 nation and have a PAL VCR, a Panasonic NV SD270 player. Pretty basic model, I know, but it plays NTSC tapes. I am converting tapes to digital, using budget software.
Well, when converting a commercial release NTSC tape I noticed a “pop” at the extreme bottom of the screen. I have worked in traditional animation and have a very good eye for discrepancies, color pops being the indicator of a mistake that needs correction. So I had a look. There was a small area of detail, which persisted for a fraction of a second and isn't a fault in the tape, so I played back the capture to see what it was.
I used a software player that allows me to step 24 frames second to view the capture. Here's the thing. The “pop” (sorry) consisted of an area maybe 20 pixels square, with 5 frames showing detail against a black background. but each time I captured the motion it displayed a different set of frames. Lets call them A B C D and E .
First try frames A B C E, displayed
Second try, frames A C D E.
Where B was present, D never was. When B was absent D was always present.
I repeated the capture 10 times and not once did all frames display. Just a fairly even split between the 2 options. Frame D had a small area of black surrounded by a fainter shade. In some captures the black area presented as a black square rather than a smooth circular area.
Replaying the capture , there was no discernible difference between the action on the entire screen, it appeared to run smoothly every time. But a clearly discernible difference between the behaviour of this small area. my perception being the result of checking and correcting literally 100's of thousands of animation cels.
Capturing at 25 fps or 30 fps made no difference
I believe that this section of the movie was sped up from the original filming speed, at least 2 times.
Filmed originally on Sony Betacam and processed using After Effects.
So does my Pal VCR play NTSC tapes at 30 (nominal) fps or 25?
Is the discrepancy due to the 24 fps stepping of a 30 fps capture? When the same thing happened at a 25fps sampling rate.
Am I wasting my life obsessing over such a small detail. Probably, but that's how I learn and I don't get out much.
A little help here please.
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Bullet in the Head - is this common knowledge? |
Posted by: Serums - 2020-08-18, 07:05 AM - Forum: Movies, TV shows and other
- Replies (22)
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Hi all,
Tying into some discussion we've had here recently, Bullet in the Head just turned 30!
I also read this interesting, but unfortunate news:
Quote:There were plans for a bluray release of this using a brand new source in full genuine HD. But the problem was the original film negative of Woo's original theatrical cut (136 min) was never found and is believed to be long gone by now. This led to all plans being cancelled.
I'd not been aware of this, but it unfortunately isn't too surprising given how some companies in HK handled their materials.
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Questions about Dialog Normalization |
Posted by: BDgeek - 2020-08-17, 09:14 PM - Forum: General technical discussions
- Replies (4)
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I know it's 2020, but I guess I still have some questions that I couldn't quite figure out about Dialog Nomarlization on AC-3, THD and DTS tracks.
I noticed that on the majority of AC-3 and THD encoded tracks on commertial discs, when attemped to decode to wav/w64 with EAC3TO, the program detects clipping and makes a second pass applying a negative gain to correct the issue. But it's usally less than the -4db Dialog Normalization standard.
- So my first question is, in case of such tracks, if Dialog Normalization flag is removed from an encoded track (EAC3TO default demuxing parameter), what would happen when played back and decoded by a regular consumer AVR product? I mean, will it occour in clipping?
My guess is that the receiver won't be able to perform such second pass correction on the fly. Is this assumption correct?
- The second question is, what's the practical implication of applying such negative gain, Does it affect the quality of the audio in any way?
- Third and final question, what about a positive gain (usually applied when setting the "normalize" option on EAC3To decoding process), does it have any negative impact on the audio quality?
In other words, is applying a positive gain is more "harmfull" than a negative one?
Thanks a lot for any valuable info!
I did a previous search on these issues, but couldn't find convincing answers. So what's better than couting on the knowledge of the great userbase here.
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HDTV BLACK LEVELS |
Posted by: spoRv - 2020-08-15, 11:27 AM - Forum: General technical discussions
- Replies (2)
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HDTV BLACK LEVELS
Code: PIONEER 9.5G Elite PRO-101FD 50″ 0,00050fL = 0,00171nits AVSForum
PIONEER 9.5G Kuro KRP-500M 50″ 0,00050fL = 0,00171nits AVSForum
PANASONIC 2013 Viera TX-P65VT65B 65″ UK 0,00058fL = 0,00200nits AVSForums
PANASONIC 2013 Viera TX-P60ZT65B 60″ UK 0,00088fL = 0,00301nits AVSForums - ANSI checkerboard
PANASONIC 2013 Viera TX-P60ZT65B 60″ UK 0,00090fL = 0,00308nits HDTVtest - black screen
PANASONIC 2013 Viera TX-P65VT65B 65″ UK 0,00096fL = 0,00330nits HDTVtest - Cal. “Mid” mode
SAMSUNG 2013 PN60F8500 60″ 0,00100fL = 0,00343nits TweakTV - Black Optimizer on
PIONEER 9G Elite PRO-141FD 60″ 0,00100fL = 0,00343nits AVSForum
PIONEER 9G Kuro PDP-6020FD 60″ 0,00100fL = 0,00343nits D-Nice
PIONEER 9G Elite PRO-111FD 50″ 0,00100fL = 0,00343nits Home Theater
PANASONIC 2013 Viera TC-P65ZT60 65″ 0,00110fL = 0,00377nits HDGuru
PANASONIC 2013 Viera TX-P60ZT65B 60″ UK 0,00117fL = 0,00401nits HDTVtest - ANSI checkerboard
PANASONIC 2013 Viera TC-P60VT60 60″ 0,00146fL = 0,00500nits Chad B - in 60Hz mode
SAMSUNG 2014 PN64H5000 64″ USA 0,00160fL = 0,00548nits HDTVtest - Cal. black screen
PANASONIC 2013 Viera TC-P60VT60 60″ 0,00165fL = 0,00565nits Chad B - ANSI
PANASONIC 2012 Viera TC-P65VT50 65″ 0,00200fL = 0,00685nits Chad B - ANSI
PANASONIC 2012 Viera TC-P65VT50 65″ 0,00200fL = 0,00685nits Chad B - fin 96 Hz mode
PANASONIC 2013 Viera TC-P50ST60 50″ 0,00232fL = 0,00795nits Chad B - full field black
PANASONIC 2013 Viera TC-P50S60 50″ 0,00240fL = 0,00822nits PlasmaPZ80U - full field black
PANASONIC 2012 Viera TC-P65VT50 65″ 0,00250fL = 0,00857nits Chad B - in 60 Hz mode
SAMSUNG 2013 PN64F8500 64″ 0,00250fL = 0,00857nits Chad B - 1080P/24 CS on
PANASONIC 2010 Viera TC-50VT20 50″ 0,00260fL = 0,00891nits hdtvtest.co.uk
PANASONIC 2013 Viera TC-P50ST60 50″ 0,00290fL = 0,00994nits Chad B - ANSI
SAMSUNG 2013 PN60F8500 60″ 0,00300fL = 0,01028nits TweakTV - ANSI
PIONEER 8G Kuro PDP-6010FD 60″ 0,00400fL = 0,01370nits Home Theater - video black
PIONEER 8G Kuro PDP-5010FD 50″ 0,00400fL = 0,01370nits AVSForum
PIONEER 8G Elite PRO-110FD 50″ 0,00400fL = 0,01370nits Home Theater
PANASONIC 2010 Viera TH-65VX100U 50″ 0,00500fL = 0,01713nits Home Theater
PANASONIC 2012 Viera TC-P50GT50 50″ 0,00530fL = 0,01816nits Chad B
PIONEER 8G Kuro PDP-5080HD 50″ 0,00600fL = 0,02056nits AVSForum
SAMSUNG 2012 PN60E8000 60″ 0,00620fL = 0,02124nits Chad B - with CS
PANASONIC 2012 Viera TC-P50GT50 50″ 0,00620fL = 0,02124nits Chad B - ANSI
PANASONIC 2011 Viera TC-P65VT30 65″ 0,00620fL = 0,02124nits CNET
SAMSUNG 2013 PN64F8500 64″ 0,00690fL = 0,02364nits Chad B - Black optimizer off
SAMSUNG 2010 PN63C7000 63″ 0,00700fL = 0,02398nits Chad B
PIONEER 8G Kuro PDP-4280HD 42″ 0,00700fL = 0,02398nits AVSForum
PANASONIC 2009 Viera TC-P54V10 54″ 0,00700fL = 0,02398nits Chad B
SAMSUNG 2010 PN58C7000 58″ 0,00700fL = 0,02398nits Home Theater
SAMSUNG 2012 PN60E8000 60″ 0,00730fL = 0,02501nits Chad B - 1080P/24 CS on
SAMSUNG 2012 PN60E8000 60″ 0,00790fL = 0,02707nits Chad B - ANSI without CS
PIONEER 8G Kuro PDP-6010FD 60″ 0,00800fL = 0,02741nits Home Theater - ANSI
SAMSUNG 2011 PN64D8000 64″ 0,00800fL = 0,02741nits Chad B
PANASONIC 2011 Viera TC-P55GT30 55″ 0,00820fL = 0,02809nits CNET
PANASONIC 2010 Viera TC-50G25 50″ 0,00830fL = 0,02844nits Chad B
SAMSUNG 2012 PN51E550 51″ 0,00850fL = 0,02912nits CNET
PANASONIC 2009 Viera TX-P42G10 42″ 0,00870fL = 0,02981nits FlatpanelsHD
PANASONIC 2010 Viera TC-P50S2 50″ 0,00900fL = 0,03083nits Chad B
PANASONIC 2011 Viera TC-P65ST30 65″ 0,00940fL = 0,03220nits CNET
PANASONIC 2010 Viera TC-P65VT25 65″ 0,01000fL = 0,03426nits Chad B
SAMSUNG 2010 PN50C8000 50″ 0,01000fL = 0,03426nits D-Nice
SAMSUNG 2012 PN51E450 51″ 0,01110fL = 0,03803nits CNET
LG 2010 50PK950 50″ 0,01160fL = 0,03974nits FlatpanelsHD
SAMSUNG 2011 PN64D8000 64″ 0,01200fL = 0,04111nits Chad B - 1080P/24 CS on
SAMSUNG 2009 PN58B650 58″ 0,01200fL = 0,04111nits Tom Huffman
LG 2010 50PK550 50″ 0,01320fL = 0,04522nits Chad B
PANASONIC 2011 Viera TC-P50ST30 50″ 0,01350fL = 0,04625nits Chad B - video black
PANASONIC 2011 Viera TC-P50ST30 50″ 0,01350fL = 0,04625nits Chad B - ANSI
LG 2012 50PM9700 50″ 0,01360fL = 0,04659nits CNET - Black luminance 0%
PANASONIC 2008 Viera TH-50PZ800U 50″ 0,01500fL = 0,05139nits Tom Huffman
SAMSUNG 2011 PN51D8000 51″ 0,01650fL = 0,05653nits Chad B
SAMSUNG 2010 PN63C7000 63″ 0,01800fL = 0,06167nits Chad B - CS on
SAMSUNG 2009 PN50B860 50″ 0,02000fL = 0,06852nits Home Theater
LG 2011 50PZ950 50″ 0,02190fL = 0,07503nits CNET - Black luminance 0%
SAMSUNG 2011 PN51D8000 51″ 0,02250fL = 0,07709nits Chad B - 1080P/24 CS on
LG 2009 60PS80 60″ 0,02300fL = 0,07880nits Home Theater
LG 2010 50PK750 50″ 0,02600fL = 0,08908nits Chad B
LG 2008 50PG60 50″ 0,03300fL = 0,11306nits Home Theater
PANASONIC 2008 Viera TC-42PX80 42″ 0,03700fL = 0,12676nits FlatpanelsHD
Source: https://www.avsforum.com/threads/compari...ls.1471147
Note: some models appears more than once due to different measurement.
If you are aware of other HDTV black level, please post a comment with:
maker - year - model - country or continent - black level (fL or nits) - source (with link) - eventual note on measurement
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