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|   How to scan films that were released at 1.85:1 for the theater | 
 
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Posted by: Onti  - 2021-08-26, 08:06 PM - Forum: General technical discussions 
- Replies (23)
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				Full Frame or just scan the area that was screened? Take a look at this: 
 
When a film goes through the Digital Intermediate process, it is quite common to only scan the actual part of the negative that will be screened. So for a 1.85:1 widescreen film, that's what is scanned. Of course this removes the possibility of reframing for 4x3 TV afterwards - but there aren't any hard and fast rules yet. 
The reason for doing this is simply to do with scanning speeds and data storage. With a full frame of 35mm taking up to 12 Mbytes (that's just at 2K, at 4K it's nearly 50Mbytes), a full feature runs into a couple of Terabytes. You can slice several hundred Gbytes off your storage requirement if you only scan the widesreen area. Of course that will give you the same effect as having a hard mask in the camera - black on the final print above and below the projected area. 
 
https://cinematography.com/index.php?/fo...bout-1851/ 
 
I often see around here that films that were shown in theaters at 1.85:1 are scanned full frame and I don’t know the reason. If you want to get a final image with an aspect ratio of 1.85:1, can a full frame scan be used for this?
			 
			
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|   When it comes to the Star Wars prequels and the original trilogy cgi. | 
 
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Posted by: jedimasterplo  - 2021-08-24, 08:48 AM - Forum: Movies, TV shows and other 
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				When it comes to the Star Wars prequels cgi and also the original trilogy good cgi changes. I want to know if it’s possible to upgrade it to modern standards and if so I’m surprised someone hasn’t tried to upgraded them. I know the prequels would be a pain to do and yes I know that technically episode 2 and 3 will be stuck to 1080p. but still the prequels cgi aged so poorly that a Vader fan film showing Vader heading to Naboo looked better than the original version of Naboo in the prequels. I really wish someone would do this to bring the films to modern day.
			 
			
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|   Song of the South (1946) - Jap LD synced to 35mm | 
 
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Posted by: bendermac  - 2021-08-22, 10:25 PM - Forum: Requests, proposals, help 
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				Now this might be a major shot into the blue, because the Jap LDs of Song of the South are extremely rare. But maybe, just maybe, someone on here has access to them and can also capture them.  
 
I'd like to sync the audio to the 35mm print that was shared a few years ago. Might improve the audio and on top we have a preservation of the LD itself. 
 
Cheers
			 
			
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|   DTS-HD MA 2.0 track on 'Evil Dead II' UK Blu-ray release | 
 
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Posted by: Peanut32  - 2021-08-20, 04:18 AM - Forum: Movies, TV shows and other 
- Replies (1)
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				Hi everyone, 
 
I don't know if a lot of people are aware of this, so i apologise if this was already a known fact. But apparently the UK 25th anniversary edition blu-ray of 'Evil Dead 2' has a DTS-HD MA 2.0 track. It isn't listed on the back of my own UK copy, and what is also strange is when you go into the menu and look trough the audio options, you can select it as a "2.0 LPCM stereo" track. 
 
I know it can happen sometimes.. that you own the region 2 blu-ray copy of a certain release and it does not include one (or more) audio options, like the UK blu-ray of 'Duel (1971)' not having the mono track, only the 5.1 remix. It can be quite annoying actually. But this time it seems it's the other way around, where the US release doesn't have a certain audio track. At least it looks that way when i check all the audio options via caps-a-holic for the US blu-ray: https://caps-a-holic.com/c.php?d1=10181&d2=10180&c=4088 
 
Could anybody please inform me if this was already aware amongst the people here. I haven't been around here for that long you see : ) 
I think it sounds really good as well, especially when comparing to the (in my opinion shitty) 5.1 track. And A/B comparing it with a mono laserdisc rip they actually sound really similar. 
 
And btw... wasn't 'Evil Dead II' originally released in mono?? (https://www.imdb.com/title/tt0092991/technical) because when inspecting the track in waveform you can sometimes see some sounds coming in from the right channel and vice versa.. 
 
And for anyone who only owns the region a blu-ray of this, just let me know if you're interested. 
 
Guus 
(Peanut32)
			 
			
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|   How was matrixed audio mixed? | 
 
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Posted by: stwd4nder2  - 2021-08-19, 02:56 PM - Forum: Everything else... 
- Replies (20)
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				Something I've always wondered but was never able to find a good answer to. How was audio mixed back in the Dolby Stereo days? Did they mix a discrete 4.0 track and then just convert it to DS, or did they mix it as stereo with an understanding of what would get matrixed out to different channels?
			 
			
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|   Script to make MKVs importable in Premiere | 
 
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Posted by: deleted user  - 2021-08-18, 03:28 PM - Forum: Script snippets 
- Replies (1)
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				Okay, it's a bit of a clickbait. The script actually just converts mkvs to mp4. However, it solves a problem that has always personally plagued me: Audio. How do you manage to end up with audio inside Premiere that doesn't require lossy compression? Convert to wav and import separately? Good luck with 24 bit 5.1 audio that will break the 4 GB limit on WAV files. Use W64 instead? Premiere won't import it. So, split the audio to individual sub-4GB wav files. 
 
It's annoying as heck... 
 
What if we could just have the normal audio losslessly inside the mp4 to begin with? 
 
That's what this script does. 
 
 Code: for %%f in (*.mkv) do ( 
     
     
 
if exist "%%~nf.mp4" ( 
echo %%~nf 
echo "already exists" 
) else ( 
rem ffmpeg -i "%%~nf.mkv" -vcodec copy -acodec alc "%%~nf.mp4" 
ffmpeg -drc_scale 0.000000 -i "%%~nf.mkv" -vn -acodec pcm_f32be "%%~nf.af4354b456nbtysdge3r5.caf" 
mp4box -add "%%~nf.mkv#video" -add "%%~nf.af4354b456nbtysdge3r5.caf#audio" -new "%%~nf.mp4" 
del "%%~nf.af4354b456nbtysdge3r5.caf" 
) 
 
rem process_in "%%~nf.mkv" 
rem process_out "%%~nf.out" 
) 
pause
  
Save this in a .bat file and you need to have ffmpeg and mp4box in the PATH. 
 
It will find every .mkv file in the current folder, see if an identically named file with the .mp4 extension exists, and if it doesn't, it will get to work creating it. It will first convert the audio to a 32 bit floating point .caf file. Then it will use mp4box to package that along with the original video into an .mp4. 
 
The resulting file will be (sometimes much) bigger than the original mkv because the audio is now 32 bit lossless. But: It works. And it's lossless. 
 
Why CAF? Why 32 bit float? Why not directly write the PCM using ffmpeg? Why mp4 and not just .m2ts or something? Well, I tried a couple combinations and this is the only one I found that both works with mp4box, that doesn't lose quality on 24 bit audio, that works for resulting audio sizes over 4 GB and that is recognized and actually works in Premiere. Iirc 16 bit worked too, but 24 bit did not. Therefore 32 bit it is. CAF because it's the >4GB version of AIFF, and AIFF works whereas WAV doesn't because mp4 requires big-endian audio apparently and WAV doesn't support that and if you do feed little-endian WAV into mp4box, it will mux it, but it will still think it's big-endian and you'll just get static. And you can't write PCM directly to mp4 using ffmpeg because ffmpeg refuses to do that because it's not *officially* supported. And mp4 as the choice for the final output because Premiere seems to most reliably seek frames in mp4 files, whereas it will open .ts/.m2ts containers but often end up showing artifacts or the wrong frame. 
 
Hope this will come in handy for someone.
			
			
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