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View Full Version : The Hack and the cards



sasi_yaad
07-22-2010, 12:07 AM
Thanks for Vitaliy and testers.

Trying to optimize the hack parameters to my sdhc cards, I did some testings on my PAL GH1,
The first conclusion is I will not need the Sandisk Extreme card.

I used HD_speed and Crystaldisk to evaluate the cards ,
latest VLC to get datarates of acquired clips,
some real life shooting (on a tripod)
and first Pappass chart (static ,hand held).

Cards:

kingston 16GB class 4: Read-19Mbps, Write-11Mbps, Burst write-7Mbps
Stable AVCHD SH 49mbps ,stable MJPEG 70mbps (stable for me! this is subjective).

Silicon power 16GB class 10: Read-19Mbps, Write-19Mbps, Burst write-11Mbps
Stable AVCHD SH 49mbps ,stable MJPEG 80mbps.


I have two types of settings:


SD_Card=class 4,6
Camera=GH1 v1.32
[Settings]
Prevent version compare=Checked
720p30 420->422 color sampling=Checked
E1 Quality=235
E1 Table=4
E2 Quality=200
E2 Table=4
E3 Quality=175
E3 Table=4
E4 Quality=160
E4 Table=4
Video Bitrate FHD/SH=56000000
Video Bitrate H=50000000
Video Bitrate L=32000000
Overall Bitrate=58000000
Limiting Bitrate=68000000

and

SD_Card=class 10
Camera=GH1 v1.32
[Settings]
Prevent version compare=Checked
720p30 420->422 color sampling=Checked
E1 Quality=400
E1 Table=4
E2 Quality=300
E2 Table=4
E3 Quality=250
E3 Table=4
E4 Quality=188
E4 Table=4
Video Bitrate FHD/SH=56000000
Video Bitrate H=50000000
Video Bitrate L=32000000
Overall Bitrate=60000000
Limiting Bitrate=68000000


With either cards or settings I can not go over 49Mbps AVCHD (real life and chart), simple shoots are averaged at of 15mbps. With both cards I can view files in camera.

For MJPEG, class 4, I can not go over 74mbps, detailed shoots are averaged at 68mbps and simple ones at 50mbps.I Can not view files in camera.

For MJPEG, class 10 detailed shoots are averaged at 77mbps , I have not tested the upper limit of this card as I think the setting are optimized.
I Can not view files in camera.

My second thought is, that Vitaliys efforts to enable changing some parameters (MJPEG for me) without the need for version upgrade, is a very good idea, as it will let me use the highest quality for my available card.

Sassi