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| Bit depth for standard DTS? [SOLVED] |
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Posted by: ChainsawAsh - 2018-02-20, 08:02 AM - Forum: Converting, encoding, authoring
- Replies (4)
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So I'm trying to encode a 5.1 DTS track using Surcode from six mono AIFF files. The resulting DTS file is perfectly fine - the channels are mapped correctly, it syncs when muxed with video, etc.
But when I pop it into MediaInfo, it's saying the bit depth is 24-bit, whereas my source material is all 16-bit. I've tried everything I can with Surcode and eac3to to get a 16-bit output file, but no matter what it always reads as 24-bit.
So in Googling around for advice or info, I came across a few people who insist that bit depth is irrelevant for lossy codecs, so whether MediaInfo reads as 16- or 24-bit shouldn't matter. But then others have been saying that standard 48kHz DTS reading as 24-bit is incompatible with various programs and players they've used.
So does anyone have any advice on this? How can I force a 16-bit output DTS file? Can I patch the 24-bit DTS file to read as 16-bit without reencoding again and degrading quality (under the assumption that bit depth *is* irrelevant for lossy codecs)? Does it even matter?
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| Premiere and Expanding Frame. |
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Posted by: X5gb - 2018-02-18, 03:26 PM - Forum: General technical discussions
- Replies (17)
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Just started using Premiere and was hoping someone could help with a full how to (idiot's guide) on a short sequence (MIGP Burg window scene from the frame it goes fully Open Matte, Ethan looking down at the buildings) with which I would like to add an expanding frame from 2.35:1 (off center so bars are slightly different top and bottom as the framing on the Open Matte source is slightly higher) to Open Matte over a duration of 2 / 3 seconds.
Now I get how to add a crop top and bottom (transform and crop and then add percentages) but can't work out how to get it to expand to Open Matte over a set duration. I have looked at a youtube video and it mentions nesting the sequence but even after nesting the full scene (again can't work out how to nest only a set section) I still can't work out how to get the bars to expand.
Any help would be greatly appreciated.
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| Cast a Deadly Spell (1991) |
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Posted by: Doctor M - 2018-02-17, 08:59 AM - Forum: Requests, proposals, help
- Replies (5)
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Cast A Deadly Spell is a fun, noir, Lovecraftian mash-up made for HBO television in the early 90's.
For the longest time the last best version available was a laserdisc to DVD preservation that I'm not even sure is in circulation anymore.
But that doesn't matter anymore, because Amazon has a 1080p stream that's also been circulating elsewhere... right?
Unfortunately, no.
This was shot explicitly for HBO as part of a set of 4 genre films written by Joseph Dougherty during that period.
Dougherty is known almost exclusively for writing TV episodes. These films comprise nearly his entire feature length filmography and shot when TV was square NTSC.
The other films are 'Steel & Lace' (1991), a 1993 remake of 'Attack of the 50 Ft. Woman' starring Daryl Hannah, and a sequel to CaDS called 'Witch Hunt' (1994) with Dennis Hopper replacing Fred Ward.
So the OAR is 4x3. Amazon has cropped the top and bottom to make this 16x9. That's nearly forgivable, but HBO has aired an HD version that has been available in their On Demand list for a long time now. HBO's version is correctly 4x3.
Watching that version recently I found something even worse... it's been censored. Swear words have been over dubbed or muted. Yup, HBO censored their own made for HBO movie. I'm not even sure they know it. But going back, the same edits are in the Amazon stream.
So while I have been considering putting together a new version using an HD source, the laserdisc2DVD audio (or at least patches from it) and some corrected closed captions from HBO, I have reservations.
First, I really need to watch both versions side by side and make sure that nothing visually has been cut or cropped/zoomed, etc.
Also, while the beautiful Amazon rip is floating around, I'm not sure I want to go to this trouble for a cropped image. I have no ability to cap the HD version from HBO beyond crappy 480i.
Anyone have any thoughts?
![[Image: vlcsnap-2571-04-17-08h52m41s513.png]](https://s9.postimg.cc/eaz9o7uvv/vlcsnap-2571-04-17-08h52m41s513.png)
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| HDTV jagged "step" artifacts |
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Posted by: deleted user - 2018-02-16, 11:58 PM - Forum: Audio and video editing
- Replies (9)
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I hinted at this in another thread, thinking it was due to interlacing in the footage. After looking at the normal interlaced footage, I think I can somewhat safely exclude this possibility.
Maybe it's more like some kind of aliasing.
Here's a comparison screenshot. Left is the HDTV, right is a WEB-DL (including some DeHaloing):
(Click to enlarge)
You can see how the lines of the font are clear on the right, but "jagged" on the left.
Any idea what might be causing this and what a good solution would be, if there is any? I'm already combining the two sources, which mildens the effect, but it's still visible.
I get the same problem with finer textures in a few shots, like finer lining on a shirt, resulting in a form of aliasing, whereas the image is rather clear in the WEB-DL.
I doubt it's simple blocking, as it is too ... predictable and constant for it, and the bitrate of the source is also acceptable, in fact it's a bit better than the WEB-DL (although MPEG-2)
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| HDTV recordings color blankets |
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Posted by: spoRv - 2018-02-15, 02:50 PM - Forum: General technical discussions
- Replies (3)
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Surely you have noted that often HDTV (and SDTV as well) recordings have a slight color blanket applied to them; even if the master is the same of the DVD or BD, you can see they are a bit different, color wise - and often also got different brightness and/or contrast.
I have noted that the same channel have the same blanket - for example the Russian HD1 has more green, and TV1000 has more magenta etc. - so I suspect this blanket is introduced when the broadcaster overlay its logo.
What do you think?
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