Norman Willis
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Canon recommends Class 6 cards for my HF S10 (in AVCHD), with 24/25 MBps. I believe the T2i records something like half again as much data as that.
On the Canon Cameras forum I was told that the T2i needs Class 10 cards, and B&H recommends Class 10 cards for the T2i. However, the fact that Michael has had good success with Class 4 up until now might indicate that perhaps you can get by with Class 6 cards…or perhaps not.
If it was me I would get Class 10 Transcend. But maybe that’s just me. You can do however you like 🙂
Norman Willis
http://www.nazareneisrael.org -
>>To me it definitely looks like a write speed issue, but I was assured my card was fast enough (of course I don’t have it on me at the moment).
The different classes of cards refer to the different write speeds, which is why Michael was asking about what class of card you were using.
Please understand that if I don’t write smiley faces all over the place, the fact that I am responding means I am trying to be helpful.
Norman Willis
http://www.nazareneisrael.org -
>>if you are asking for help why not give useful info, type and speed of the card.
Norman Willis
http://www.nazareneisrael.org -
>>BTW, if you are planning to edit multi-camera AVCHD have you tried it already? I don’t think it will be possible (too taxing on the CPU). You should plan on converting your AVCHD to Cineform or some other intermediary that can be edited more smoothly.
Yeah, sorry if I was not clear. I am always converting to Cineform .avi. I just meant that that AVCHD was the original source (as opposed to 5DM2 or P2).
I was able to render successfully to MPEG-2 (the right size file), and now I just have to find time to learn DVDA, so I can burn the first project to disk. But then I am thinking about cutting over to RAID 10 before I begin the second project.
Thanks for your help.
Norman Willis
http://www.nazareneisrael.org -
>>Steve, I am looking at RAID 5 for the redundancy aspect.
OK, I just got off of tech chat with Dell, and they told me that RAID 5 for video editing is a bad deal. Apparently the CPU has to work hard to ‘distribute parity’ (i.e., decide what information gets written where). It takes up to 36% of a quad core; so even if the RAID 5 array might write fast enough, the additional load on the CPU would be an issue, as the CPU is already the bottleneck in my system.
They recommended RAID 10. It won’t be as big an array as RAID 5, but it should still be big enough, and it won’t tax the processor nearly as much. And one still gets redundancy.
Norman Willis
http://www.nazareneisrael.org -
>>Although writing to RAID 5 is slower, I thought it was still faster than a single drive. I’ll have to do more research on that.
I just got off of tech chat with Dell, and they confirmed that while RAID 5 reads very quickly it does write more slowly than a single drive. Apparently the CPU has to work hard to ‘distribute parity’ (i.e., decide what information gets written where). It takes maybe 36% of a quad core; so even if the RAID 5 array might write fast enough, the additional load on the CPU would be a bad thing, as the CPU is already the bottleneck in my system.
They recommended RAID 10. It won’t be as big an array as RAID 5, but it should still be big enough, and it won’t tax the processor nearly as much.
Norman Willis
http://www.nazareneisrael.org -
The RAID 5 is something I’m considering. It would double my current 2TB’s of storage to 4TB and give me redundancy and I can still partition as D: and E: to keep my stock footage separate from my editing work. I will just get less performance than my RAID 0 but still should be better than a single non-RAID drive.
John, I am researching RAID 5. It is a little different than what I expected. It appears that while RAID 5 can be a very quick reader, it can also be very slow in writing, under some circumstances.
https://www.zdnet.com/blog/ou/comprehensive-raid-performance-report/484
Can you tell from the article if four 7200 RPM spin HDD’s in RAID 5 would be able to write fast enough to handle three streams of AVCHD and some FX?
And also, how does Vegas work? If one has multiple streams of AVCHD and FX, does Vegas still only need to write slowly, in that while the CPU may need to pull from multiple locations, it only has to write to one?
Norman Willis
http://www.nazareneisrael.org -
>>If you are editing DC, HDV or AVCHD, then any 7200RPM SATA disk and most USB 2.0 External disks can easily keep up with the 25Mb/sec data rate, reading or writing.
Steve, I am looking at RAID 5 for the redundancy aspect. If one had a hard drive crash, it would be nice not to lose data. If one has multiple tracks and FX, does one still only need 25MBps regardless of the FX used, because Vegas only reads one thing at a time?
The reason I ask is that it appears that while RAID 5 can be a very quick reader, it can also be very slow in writing. So I would need to find out if four disks in RAID 5 could reliably write 25 MBps.
Does that sound like the right question to be asking?
Norman Willis
http://www.nazareneisrael.org -
You know, the best way to improve your video quality is a tripod. It sounds like a fluid-filled head is outside of your budget, but even an inexpensive one will give you a way better viewer experience than hand-held, and it eliminates the need for expensive stabilization software.
Between that and your X-grip and maybe a lens hood, it sounds like you should have a good start.
Norman Willis
http://www.nazareneisrael.org -
Hey, a budget is a budget. I am glad you got something that will work for you 🙂
A lens hood is a good idea if you can spare a few dollars. It keeps the sun (and over overhead lights) off of the lens, which eliminates unwanted glare.
Norman Willis
http://www.nazareneisrael.org