Matthew Nelson
Forum Replies Created
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Following the strategy in the article Jeremy posted try using the frame controls of compressor under retiming control setting the duration to 200% with better motion compensation.
Matt
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[Graham Futerfas] “Can someone please help verify the correct settings in Compressor to convert footage from 60i to 23.98P so that it looks like 60 frame slow-motion?”
There is no setting in Compressor or CT that will make 60i look or act like 60p. When the footage is deinterlaced the video goes from 60 fields/sec to 30 frames/sec. So the slow motion you will get is the 25% speed difference between 23.98 and 30. Any further slowing of the footage will have to be done by using some form of speed shifting like optical flow or simple speed change with frame blending.
Matt
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[Sean ONeil] “I think it was telecined to NTSC, then converted to PAL, then converted back to NTSC.”
If this is the case any field/frame relation with the source 24P was blown away when the 29.97 telecine was PAL converted. The standards conversion process generates its own unique fields/frames.
Matt
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Did you reverse to 23.98 or 24?
Matt
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Wayne
You have a couple of options.
1. Speed adjust the 50P down to 50%. This option is a pain in the butt and doesn’t look as good IMHO.2. Use the DVCPRO HD frame converter tool on the 50P footage to make 25P clips. This option takes time and cannot be batched but the resulting footage is excellent slow mo.
3. Use Cinema Tools to conform the 50P to 25. This option is fast and can be batched and yields the same quality as the frame converter tool. However it does permanently alter the metadata of the 50P clips. So DO NOT do this to your original source clips.
Matt
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[gary adcock] “that is not a guarantee that is accurate, nor does it mean that CT is always correct in its assumption of cadence. ( and that could create a secondary issue with CT always defaulting to 24 fps rather than to a more acceptable 23.98 ) “
CT makes no assumptions nor does it guess the cadence like AE. In CT 4.0.1 it simply defaults to field 1-field 2, AA and 23.98. The burden is all on the user to make the right selections in the reverse telecine dialog box. In Trevors case the first frame of the clip was the BB frame according to AE’s guess. So selecting BB or B1B2 would be the correct setting.
Going to the 0 or 5 frame is only necessary if the user makes no changes to the default settings. I can guarantee that if the user knows where they are in an unbroken cadence and selects accordingly they will have no trouble reversing telecine.
[gary adcock] “CT can remove advanced pulldown- Adam Wilt has that posted on his web site. “
Good to know I will check this out.
Matt
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[Jeremy Garchow] “With Cinema Tools you have to put the playhead on the A frame before you hit the rev telecine button.”
I must respectfully disagree with Jeremy. CT can reverse the telecine from any point within a cadence, but it is up to the user to tell CT where in the cadence the first frame of the clip is. Hence the choice of AA, BB, _BC_, _CD_, or DD. I personally have successfully reversed telecines from each of these points in a cadence.
What CT cannot do is reverse advanced pulldowns nor can it reverse broken cadences.
[Jeremy Garchow] “the Cinema Tools manual is extremely short and very concise on this subject.”
I whole heartily agree. The manual is quite obtuse.
Matt
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[Lewis Long] “Ever since I have been trying to export smaller clips of the same movie,”
What do you mean by smaller? File size? TRT?
If it is file size the more you boost the compression especially Sor3 the more artifacting you will get. For me when I really need to compress the snot out something I use H.264. In my experience it holds up the best when going to really low bit rates.
Matt
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What is your render quality set to?
Matt
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If you are still running AutoCad and that is your core business I’d stay in the PC world and use Adobe Premiere CS3 for your video editing needs. From your post it is hard to see why it would make sense to switch to mac and FCP.
But if you are committed to mac and FCP you can use boot camp to boot windows on your mac or parallels to run windows inside of OSX for your PC app needs. Parallels virtualization most likely would give you a performance hit on renders.
[Chris Davis] “is there any interface here with these skills or programs specifically 3ds Max for what im going to be doing on the Mac?”
There are 3d apps for Mac, the ones off the top of my head are Maya (also from AutoDesk) and Cinema 4D (which I use). I know Cinema 4D can work with AutoCad when in .dfx. I hope you posted on the 3ds Max, Maya and C4D forums they most likely would give you better answers.
Matt