[Dave Gage] “Here’s some numbers from an 1:03:00 class from yesterday:
Original ScreenFlow file: 2.78 GB
ProRes 422 Export: 67 GB
ProRes 422 LT Export: 49 GB
H.264 (data rate- 2000 kbps): 942 MB (look great by the way full screen)
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I will try the H.264 file this weekend and create a Proxy from it and see how it edits, then export from the “original media”. Because this is a screen capture of an Adobe Connect class streamed off of their servers, the fps and sync is not great anyway. It is highly unlikely I would do any color correction for these classes, so Proxy should be fine. It’s not likely I would need to go back and re-edit any of these classes, but if I keep the .screenflow doc and the H.264 file, I could if I needed to. There’s no way I can warehouse the ProRes 422 files with 3 classes a week.
I’ll post back with the results.”
I got busy, but got a chance today to edit one of the classes with an H.264 export from ScreenFlow. Here’s what I came up with:
1. ScreenFlow exported file was: H.264, PCM 48k, video data rate: 3000 kbps, size: 1600×1000, 54 min. long, final file size: 1.76 GB.
2. Used my 2-drive RAID 1 enclosure via FW800 for media/Events/Projects. (I could have connected via an eSata ExpressCard, but wanted to see how it felt with FW800 first). This is all with my Early 2011 i7 MBP 17″ with 8GB RAM.
3. Decided to try it first with “Original Media”. Next time, I’ll see if it’s any better with Proxy, but this went fine.
4. Did my edits on a 720p, 30P Project, did not render. Exported standard Pro Res 422.
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Conclusions:
It was fine. A couple of short beach balls, but not much problem at all. I can try it with Proxys, but it may not save time if I’ve got that going on in the background while I’m editing. I thought FCP X did surprising well with the compressed H.264 format.
The H.264 quality is more then sufficient for the low-quality video captures I’m getting via the Adobe Connect servers (I think they only put out about 10-15fps and because of the Internet delay, the audio is not quite in sync with the mouth movements).
The FW800 connection was fine too. As much as I’d like to say I’ve seen big differences between a FW800 and eSata connection, I haven’t. I’ve gotten tired of trying to edit in different locations and dragging around external drives (powered and non-powered). I broke down last week and bought a new Hybrid HDD drive to replace my optical drive (although I will move my boot drive to the optical slot). The benchmarks I’ve seen should put this Hybird media drive at about twice as fast as the external RAID 1. (When I get time, I’ll also convert the RAID 1 to RAID 0 for when I’m working at home and see if it out performs the new internal Hybrid drive.)
That’s my story. If I come up with any other significant info, I’ll post back at this thread with an update.
Dave