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Does converted MTS 24p footage also require "pulldown" process?

Hi.

I am using a Canon HF20 camcorder. The files are MTS. I was shooting in 24p mode. I have FCP 6, which apparently cannot handle MTS media. So I found a way to convert the files to HDV (or AIC) via an application called Clipwrap. My question is: Must I also deal with the extra-frame/pulldown problem (endemic to usual 24p footage) of the new clip, or has that been taken care of in the conversion process? If not, is there a way to tackle both these issues (MTS conversion, pulldown) in one fell swoop?

Thanks,

Marc

Posted on Sep 11, 2012 11:20 AM

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16 replies

Nov 3, 2012 6:56 AM in response to phenomenalworld

search is your friend, and wikipedia is an even better friend


http://en.wikipedia.org/wiki/I-frame


Scan the wikipedia article. It's not that complicated.


Prores formats are all i-frames which contain all the data for that frame while HDV is a combination of i-frames and frames where the data is just the difference between previous and or following frames. I think HDV has i-frames every 15 frames (not sure about that exact number). An all i-frame format will have larger file sizes but will put less demands on the computer while a format like hdv has smaller file sizes but requires the computer to calcuate the image for all frames that are not i-frames.

Nov 3, 2012 8:31 AM in response to Michael Grenadier

thanks michael. that clarifies. as long as i'm in touch with somebody who seems to know stuff about this, what do you think of h.264? it's been recommended to me for using with JES Deinterlacer for 24p pulldown process. I can also manipulate the data rate with JES so that the file isn't four or five times the size of the original, and the finished output seems to be very good quality....

Nov 3, 2012 8:36 AM in response to phenomenalworld

I've played around with it without anything jumping out at me that I can't do with compressor, cinematools, etc.


You're talking about removing pulldown? Certainly if you don't need to edit the material and you just need to remove pulldown, that'd be great if there's no quality hit. H264 is not a good editing format and it's NEVER a good idea to work with it in fcp. It will edit natively in Premiere and fcpX, but it's still not ideal.

Nov 3, 2012 8:48 AM in response to Michael Grenadier

certainly i need to edit the material (using fcp6), that's why i'm removing the pulldown. why is it not a good idea to use h264 in fcp? i've already got (hundreds) of clips in my project that use either AIC or HDV and occasionally Photo JPEG. these seem to work fine - at least together in harmony on the timeline. are you saying that H264 won't work the wya these clips work in FCP?

Nov 3, 2012 10:10 AM in response to phenomenalworld

I think you're ok with all 3 formats as far as being fcp friendly. As long as you see them in the Easy Setup sequence settings, you're probably fine. There can be issues with mixing frame rates. If you need to do that, post back and we can discuss workflow. Personally, I try and match all my clips to one sequence setting. not completely necessary, but in the long run it makes life simpler.

Nov 19, 2012 5:47 PM in response to Michael Grenadier

Michael,

Couldn't retrieve my apple password for a long time through cyber-obfuscations. But here I am, now. With all the misery that using 24p has wrought upon me, and now headed back into the field for more recording on the same project, I'm thnking of switiching to 30p. The question is, what issues can I expect when mixing frame rates and how much misery can i expect to encounter in doing so?

Thanks...

Nov 20, 2012 9:51 AM in response to phenomenalworld

you can usually drop 24p material into a 29.97 fps timeline without any issues EXCEPT that fcp does not add pulldown in the best way. If I remember correctly, fcp just repeats the 4th frame. This may or may not be objectionable when you view it. You can add pulldown with full flexibility in After Effects. I don't imagine it would be a big deal to do this after you've locked picture.


My mantra is 'TEST YOUR WORKFLOW" from soup to nuts (ingest to output in delivery format). I sometimes make DP's, producers, etc crazy, but better them than me.


And yeah, sometimes it is just simpler to shoot 29.97. But most importantly is what is your end use. i recently finished a doc that had to be output to a digital cinema package for academy award consideration. The specs demanded 24 fps (not 24p aka 23.976). My sources were all over the place. Landed up using compressor to change the frame rate of all material to 23.986 and then the post house doing the dcp output conformed to 24.

Nov 25, 2012 2:36 PM in response to phenomenalworld

you should convert your 30p footage to 24p using compressor. You'll need to customize the appropriate preset by changing the frame rate in the video settings in the encoder tab and then setting the appropriate settings in the frame control panel. Be sure and set the retiming quality to best.


If you can live with your 30p material slowed down, you can simply "conform" to 24p in cinematools without any loss in quality.

Does converted MTS 24p footage also require "pulldown" process?

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