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I don't know how you guys do but personaly, i have "skipped frames" in every definition
even at 1152x500 (<20MB/s)


Are my sandisk cards too old ? (SD Extreme Pro 95MB/s)
You really have 0 skipped frames (1st line when recording) at all ?

Ugh... I give up! Shot some random handheld shit earlier while testing stability and reliability etc and have just been going through it all.

This time I have absolutely no Moire issues and have brickwork AND trees in the shot! It should be horific! Soooooo Confused.

Uploading now: http://ge.tt/6jRVggg/v/0?c

Did you import it with After Effect ?
If so, you can apply lens correction (distortion and vigneting) when Camera Raw opens the 1st DNG

OK, "threes in the wind": http://ge.tt/2UsyIfg/v/0?c
1504x600, just autoWB modification

The problem is in the lower right part. I don't think it's a macro block issue, rather too many skipped frames. Cause it happends on a regular basis. No ?
And in the center of the frame, i think it's a nice aliasing issue in the three ?
No problem with leafs at least !

Carreful, bench values are different when in video mode. Don't know why.
And for now, frame skipping is ok but i shot threes in the wind this afternoon and..... i think you won't find it ok anymore !

Alex, 1%, what is the frame buffer size when recording raw video please ?

How fewer frame drops can we condider a resolution valid ?

Ok, try over 4gb now. I forgot to patch the limit.. only made written 64bit

Hehe, working now (on my exFAT SD card) !!!!!!!!!! Congrats !
Waooo: 16.519.913Ko / 10692 skipped frames.
Stopped it cause of low battery ! Pretty sure new try it will feed the card completly

We are limited to 8 characters.

It smells like FAT32 limitation no ?
Does it apply to exFAT ?

Wikipedia says you can't use long names on FAT32 without paying Microsoft but waht about exFAT ?

awesome !

I did but dropped frames incrases too.
I'm converting right know

When it reaches 4GB, movie record stops.

Imagine where we will be next month !

Just shooted a new video 1504x600 outside, just uploaded it.

Only modified WB in AE, set it to AUTO WB
During video, i changed aperture from f/4 to f5.6
Last frame (pinkish) is not due to crash, i just normaly stopped recording.
Double buffering did correct well the problem in the 1/4 upper part !
Tons of skipped frames.... how to reduce them ?

Makes me realise a few things:
- you need to disable the sleep mode !
- raw files would benefit a unique name (continuous numerotation) cause every cam restart cause the name restart to M0000.raw
- as for the regular recording, a log file with ISO, aperture, LENS NAME (cause we can remove disto and vigneting when importing in AE), would be great

I wil try with formatting card, maybe  could squeeze a litlte bit more speed out of it.

Can you confirm the gain with cluster size = 4096k ?
When benchmark starts, it seems to reserve 4MB, that's perhaps why the 4096k cluster size is ideal...

My steps:

1- format the SD card in ExFAT
2- EOScard
3- put back ML files

Quest for ultimate speed !

teo770 did you try 1504x640? I tried and get continous recording, 40 more pixel and already in 2,35:1 so very easy scaling by 128%.
The same card and cam so check it out. I wil try with formatting card, maybe  could squeeze a litlte bit more speed out of it.

Just tried 1504x640, worked fine till the 4GB file limit.
This 4GB limit will now be a serious issue, cause at 1504x640, the 4GB is reached in 3.20 minutes only !

Other things:
How much frame skipping is important ? Could we have a live indicator of % frame skipped ?
Perhaps would be good to have (even as a debug option) live sensor/digic temperatures ?

I found shooting at 1504x600 is the highest I can shoot continously (bar reaching the 4GB limit - any possibility of that being lifted for tomorrow so I can do some real testing?).

I just remembered when i received my last SD, it was not formated in FAT32 but in exFAT and it worked in the camera. It didn't worked in my TVIX media player so i reformated it in FAT32.
I've just read on Wikipedia that 4GB limit is due to FAT32 and the exFAT format wouldn't have this limitation......
(http://fr.wikipedia.org/wiki/ExFAT)

So... i'm trying.

"Movie stop recording automaticly" .... it doesn't sounds like a Canon text.... by chance, maybe a ML file size limit somewhere ?

Good to know: benchmark on card formated as FAT32 or exFAT is the same (0.1 difference sometimes)
Another thing to be verified, when formating exFAT the SD card, using higher cluster size make better benchmark.
Cluster size: 4096k => +0.3 to +0.5MB/s in benchmarks

I tested 1024k,2048k,4098k,8192k cluster sizes my best result (in bench) is 4096k

When recording RAW video @ 1540x600 24/25p, what buffer size is used
We could directly adjust SD card cluster size to better fit the buffer, no ?

Maybe black level and ML digic ISO corrections apply... I dunno about vignetting, check.

Would be funny if there was a moire cleaner in the path from raw to h264

Vigneting checked !
If you place DNG files in Lightroom and apply some lens corrections (you have to manually select the right lens),
you will see Lightroom corect the pic for distortion and vigneting so the DNG are really RAW 100% pure.
I'll check for the PictureProfile tomorrow but i almost sure it's the same.

Lexar seems to have good cards too. I know a 64GB UHS-1 600x (90MB/s) exists (90 euros).
Need to be tested.

After.... the only solution is the 800x or the 1000x lexar CF cards.... in a 5D Mark III


I think the quest for speed will end with the Sandisk....

Perhaps with a raw mode in 1200x665 24/25p scaled 1.6x we could get descent result ?

teo770 could you please make a 5min benchmark with latest ML build and your sandisk 95mb/s and post the results?

Sandisk SD 32GB (95MB/s)
Movie mode, global draw OFF

Write speed (buffer:2048k): 35.8MB/s
Read speed  (buffer:2048k): 37.4MB/s
Write speed (buffer:1953k): 30.6MB/s
Read speed  (buffer:1953k): 36.1MS/s
Write speed (buffer:3072k): 35.8MB/s
Read speed (buffer:3072k): 36.0MB/s
Write speed (buffer:2929k): 33.6MB/s
Read speed (buffer:2929k): 36.2MB/s
Write speed (buffer 4096k): 37.9MB/s
Read speed (buffer 4096k): 38.3MB/s
Write speed (buffer 3906k): 35.7MB/s
Read speed (buffer 3906k): 38.1MB/s
Write speed (buffer 16384k): 38.9MB/s
Read speed (buffer 16384k): 39.7MB/s
Write speed (buffer 15625k): 38.7MB/s
Read speed (buffer 15625k): 39.7MB/s

Raw 1280 x 720 25fps: http://vimeo.com/66094923

Question: when recording RAW, what tweaks are applyed to the video ?

- Lens distortion correction ?
- Vigneting ?
- WB ?
- Picture profile ?

In my opinion.... noone ? Am i right ?

I'm uploading to vimeo my 1280x720 raw converted to x264, the 1/4 upper part is showing some flicking... dont know why.
I just raw2dng the .raw file then imported the DNG sequence in AE and rendered it as x264.

The video: http://vimeo.com/66094923


I'll try to color grade it later but colors seems already deep to me.

On my Sandisk 32GB 95MB/s, i'm able to record raw à 1280x720 unlimited. 38-40 Mb/s displayed, about 15-20 frames skipped every 1000.

Wish a shorcut to start/stop RAW recording !

HD720p 14 bits 4.2.2 video with full frame pixel size... DXOMark will have to create a new category !!

You think we will be able to review DNG files on LV ?

Funny: i quit the GH2, tired of looking for "the ultimate hack" to have a good compromise btw image quality and stability, telling myself, with new Canon's high bitrate encoding.... it can only be better out of the box and..... bitrate hacks are coming to ML too !

External encoders like the Atomos Ninja records at 220MB/s (4.2.2)
Canon 6D and 5D Mk III share the same bitrate of 90MB/s (4.2.0), no ?

How far could be pushed the bitrate on those cameras ? twice 90MB/s ?
With what kind of stability ? Would depends of memory card speed too, of course.

What's the "reasonable" goal ?

$1795 ! I should have specified a free tool !!!
I'm googling, will tell u if i find something usefull.

Anyone knows if an utility like streamparser (Panasonic's GHx hack tool) exists for Canon's MOV ?

It's a really nice tool to see what's in a movie (frames, frame drops... etc)

Would help "qualifying" SD cards for ML... no ?

Can you estimate the 6D real needs ? For HD1080p ALL-i for example.

When would we need more than 40 Mb/s ?