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Messages - TheMash

#1
Camera-specific Development / Re: Canon EOS M
July 08, 2015, 03:30:15 PM
Hi guys,
I'm successfully recording in H264, with 3.0x bitrate settings. I get values of about 90-120mbps.
I've read that above 1.4x video and sound doesn't mix very well.
I've made a try and on a one minute clip everything looks fine.
What are supposed to be side effects on audio when recording with bitrates higher than 1.4x?
Strangely, I'm able to record very long clips at x3.0 bitrate and high iso (3200) on EOS M (SDHC Sandisk Extreme 32gb 60mb/s) and I had problems on my 5D Mark II at same settings instead (but with CF Sandisk Extreme 8gb 60mb/s), the recording stops when I film dark areas (I suppose the data rate increase further).
On both cameras I'm using Cinestyle PP.
#2
Camera-specific Development / Re: Canon EOS M
July 02, 2015, 01:09:32 PM
Quote from: josepvm on July 01, 2015, 09:10:07 PM
Already tested: raw video recording (either mlv_rec or raw_rec) is not possible at 1280x720 30fps with the Transcend 90MB/s card: red warning in mlv recording, skipped frames, recording stops imediately. And it works with the Sandisk Extreme PRO 95MB/s (yellow warning in mlv, because actual writing speed is ~ 38 MB/s, but it works) ... so there is really a write speed difference.

Quote from: Licaon_Kter on July 01, 2015, 11:29:02 PM
Answers here: https://rbrune.github.io/mlraw/

Thanks for your taking time doing tests, I apreciated it.
The difference between cards are in flash memories and controllers for sure. Sandisk has better flashes chip and faster controller.
I chosen the Sandisk Extreme 60mb-40mb (RW)/sec, I would use them only on the M and occasionally shoot RAW (for personal projects), so I think the 95MB/sec would be a waste of performance.
Anyway, for more robust performance in RAW I've the 5D Mark II (the best would be the Mark III but I'm waiting for a possible new body from Canon, Mark IV?).
As soon as I'll receive the M from courier I'll post my feedback here.
#3
Camera-specific Development / Re: Canon EOS M
July 01, 2015, 02:11:41 PM
Hi josepvm, thanks for your prompt reply.
I'm not going to use the M with any M lens, because I don't own one and I think I'm not planning buying one of them.
I'll use it with EF L lenses exclusively.
Will the EOS-M benefit the extra speed of the sandisk for recording at higher bitrate or will be capped by SD interface speed?
Thanks again in advance.
#4
Camera-specific Development / Re: Canon EOS M
July 01, 2015, 01:25:21 PM
Hi everybody!
I'm from Italy and I've just joined the forum. I'm a ML user since 2 years on a 5D II.
Recently I discovered (lately) the potential of EOS M (further improved by ML).
So I decided to buy a refurbished one with original Canon EF adapter because I've various L lenses to be used on this camera.
I'll use the M on a glidecam or on a monopod for those situations where extreme lightness and versatility is required.
Now i'm going to buy some SD cards (because I've almost CF cards) and I'm going to buy Transcend TS32GSDHC10U1 Secure Digital SDHC, 32GB Class 10 UHS-I, stated for 90mb/sec (I assume it's the reading value) because of its very good price.
I know the hardware interface on EOS M is limited on transfer rate to about 40mb/s, so I don't want to buy cards with speed that gives me no advantage in using them (and wasting money).
I'll sure record with bitrate multiplier to obtain better results.
What do you think about those cards?
Thanks!