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mixed format editing on FCP7 : TM700's 1080p50 and 1080p24

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inanc tekguc
mixed format editing on FCP7 : TM700's 1080p50 and 1080p24
on Jun 2, 2011 at 8:23:54 am

Looked at different forums and realize that the common approach is "either convert them all to your output format, or to the format from which you have most".

But maybe my question is a bit different.
It's about combining different files on 1080 size all of which are ProRes 422 based. I am using the almost-infamous TM700 1080p50 camera. Some are converted from .mts to .mov using ProRes 422 LT, some with 422 Proxy. Also, some are shot in 1080p50 and some are shot in the Cine Mode with 1080p24.

I won't bore you with the reasons for below actions but here is what happened:
I shot several hours on 1080p50. At some point I switched to shooting in Cine Mode with 1080p24 for a few more hours.

FCP managed to log+transfer the 1080p24 footage from the SD card (it automatically used ProRes 422 codec while doing that)
I converted the 1080p50 .mts footage to .mov using ProRes 422 LT on a 3rd party software. Inspector shows the .mov to be 50p. I realized it was taking too much space and started using ProRes 422 Proxy to cut down a bit on quality. Still looks very clear on high-res 15" MBPro on full screen.

So, I have two questions:
1- Which format to keep shooting in?
I think it will depend on how I plan to export it.

My preferred workflow would be to keep archival copies of 1080p50 .mts files for possible future high quality needs and output for now as 720p50 having heard that 720p is possible to play in most places.
But I am using too much memory already, and if it will save me much memory space while keeping a good video quality, I might be happy to export either on 1080p24, or 720p24 (or 1080i?).
Would that mean I will need to shoot on 1080p24? Or is there a way to shoot with 50p and then drop frame rate while converting? (Clipwrap doesn't seem to have this ability)

2- How best to edit these formats in same sequence. As they are all ProRes 422 based codecs, will I be OK with just a bit of initial rendering? Which one to be the sequence setting?
Is it bad idea to drop 24p on 50p timeline? or 50p on 24p timeline? (not even sure if the converted 1080p50 files give actual 50p. Sequence properties say it is HDTV 1080i 50fps).
Shall I keep the sequence size on 1080 and convert only on export to 720, or start with 720 from the beginning of editing?

Sorry for long post, but I tried to answer any feedback questions you might have, and also to ask specific questions to be more clear.







and import them to FCP7. I did not calculate that this decompression meant multiple times bigger file sizes, now I am running out of memory and it will be hard to keep buying several portable externals to keep working on one project (one hour is easily over 100gb with ProRes 422 format converted from 15-20GB AVCHD).

So, first I switched from ProRes 422 LT to 422 Proxy, then


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