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Simple test needed for AVCHD 1920×1080
Experts,
I have gone 90% upgraded my editing system, man… it cost me more than I want, however, I am not sure if I am getting all the bang for my bucks. If someone will be kind to run a test for me:1. Place a 1920×1080 AVCHD video on top of one another with the top having 50% transparency and the bottom clip, cut into three sections, remove the middle one, butt up the bottom clips together, add a cross fade transition. Play the video with GPU acceleration, do you get stutter play back after the video passed the transition? I am frustrated with this and upgrading my video card to GTX 570 still seems no improvement.
System: i7, 16G RAM, GTX 570, SATA C, PATA 7200RPM V (250G free).
So, any thoughts? Thanks for your help in advance.
Sincerely,
Perry -
6 Replies
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I did another test, I think I may have figured this out… but after $1000 later… If I lower my Camcorder Recording Quality to FXP which is 17 Mbps vs MXP which is 24 Mbps, my system handles everything that throw at it.
So, my question is, what is the difference between 17 vs 24 Mbps? They both are 1920×1080 60i but, can one tell the quality difference?
Thanks in advance,
Perry -
[Perry Cheng] ”
So, my question is, what is the difference between 17 vs 24 Mbps?”Data rate. One is higher than the other. HA! Ok, got that out of the way. Seriously…it’s a higher data rate, more complex to play back. Faster drives needed, or more processing power.
[Perry Cheng] ” They both are 1920×1080 60i but, can one tell the quality difference?”
You tell us. Shoot something with both settings…the same subject. Then compare.
Shane
Little Frog Post
Read my blog, Little Frog in High Def -
Thank you Shane, so even with my new system: i7, 16G RAM, GTX 570, SATA C, PATA 7200RPM V (250G free), I still can edit 24 Mbps 1080p file smoothly? Is that your experience? I just want to rule out everything. The only thing I did not try yet, is buy a SATA 6G/s 7200rpm drive for the preview video drive. But, would that make any difference?
Perry
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[Perry Cheng] “…PATA 7200RPM V (250G free)… The only thing I did not try yet, is buy a SATA 6G/s 7200rpm drive for the preview video drive. But, would that make any difference?”
Did you benchmark your PATA drive? What kind of a data rate are you getting?
Here is one way to benchmark it without installing anything:
https://blog.dv411.com/2011/01/disk-test-quickie-windows.html
The other one is to install (or copy the executable of) a bench test from AJA or BMD or a third party.
Alex Gerulaitis
Systems Integrator
DV411 – Los Angeles, CA -
thanks, I think it is time for me to pitch in more for another HDD? V: drive is only reading and writing at 30MB/s (probably because the use of a PATA HD controller? I will find a Serial ATA instead, hopefully soon.
Sincerely,
Perry -
Like Shane said, it’s either the data rate, the complexity (CPU load) or both.
30MB/s is still roughly 10 times faster than you video datarate, so that alone doesn’t explain it, even with dual streams.
To eliminate that possibility (of the media drive being too slow), you could place the clips on your boot drive (probably faster even if it’s 5400rpm – benchmarked it?) and test from there.
What’s your CPU usage during the tests?
I’d try to simplify the test to death before purchasing anything. Although PATA drives should be on a 5-mile restraining order against approaching CS5+ editing systems. To simplify the test and zero down on the actual culprit, use really short clips, trash Pr preferences, try different transitions and effects…
Alex Gerulaitis
Systems Integrator
DV411 – Los Angeles, CA
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