40Mbps AVCHD High Reliability Patch

damn I've playing around with this patch in conjunction with PNY professional class 10 16GB cards and I'm getting a few write failures when filming at a sharply focused carpet at about 4 inches away...

Is it possible to turn down the max rate in ptool and leave all else untouched and expect the same reliability but with a capped write speed?


http://www.newegg.com/Product/Product.aspx?Item=N82E16820178302

20-178-302-TS
 
PROBLEM
i have a brand new GH1, i tried this patch

i made a 5 second test in "smooth" film mode it was ok but i then tried "nostalgic" and it stopped after 3 seconds and i got a message like "film recording stoped because your card is too slow" ????" i have a "32mb lexar pro 133x" class 10 card !!! did i do something wrong or is this patch unreliable ? my serial is WE1BA001275 is my gh1 too new to be hacked ??

no problems here with the sandisk extreme 30mb/sec card. did you format the card in the camera??

also, read the section about how to hack your gh1-with video-to make sure you did it right. all gh1's can be hacked.
 
no problems here with the sandisk extreme 30mb/sec card. did you format the card in the camera??

also, read the section about how to hack your gh1-with video-to make sure you did it right. all gh1's can be hacked.

thank for your time to answer me, but please delete your answer as i deleted this post that i had posted in duplicate, update : the problem came from the sd card : don't buy lexar
 
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update : the problem came from the sd card : don't buy lexar

This is not fair of you to say.

I believe yesterday you would have argued: do not use the 40 Mbps Reliability Hack, because it doesn't work.

Today it's: don't buy Lexar.

This statement is based only on the fact that in your specific situation one card did not work.

Perhaps when you get a failure with your other card, or it will just crash, are you gonna promote not buying that mark as well?
 
This is not fair of you to say.

I believe yesterday you would have argued: do not use the 40 Mbps Reliability Hack, because it doesn't work.

Today it's: don't buy Lexar.

This statement is based only on the fact that in your specific situation one card did not work.

Perhaps when you get a failure with your other card, or it will just crash, are you gonna promote not buying that mark as well?

put yourself in my position i tested the brand new class 10 lexar card (which has a good reputation in photography) without the patch and it worked fine at 17mbps then i patch the camera and it fails at 44mpbs, this card was supposed to be good for 80mbps so i rather believed i did something wrong on the patch. my recomendation don't buy lexar of course don't means that all lexar cards will fail at 80mbps it just means that they dont test what they sell, which is unreliable and when something is unreliable i advise : DONT BUY.

my mistake was to write too soon on the forum before i did cross testings with other SD cards and i am sorry that i made you loose some time helping me. (in exchange i took some time sharing my experience and posted my sd card benchamrks and remarks on the sd cards parts of the forum so other users dont have the same problem with lexar pro "class 10" cards that are sold untested. now they added a sd card warning on the step by step patching guide (because i am not the only one it seems to have problems with class10 cards that dont deliver the 80mbps) had i read something about paying special attention to sd cards i would have made some more research on sd cards for the gh1 and i would have not lost your time and mine posting about this problem.
 
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No, this is an inherent limitation of the camera itself. If you set the shutter speed to less than 1/50 sec in 720p50 mode (or less than 1/60 sec in 720p60) you are forcing the camera to open the shutter for a longer duration than your frame rate. As a result, the camera cuts its frame rate in half (down to 720p25 or 720p30) in order to maintain the slow shutter speed you have set. This also causes the bitrate to drop to very low values.
That's not been my experience at all. When shooting 720p60 with the shutter at 1/30 s, indeed the effective frame rate drops in half, with each frame doubled. But the bit rate falls to somewhere between 1/2 and 2/3, and the picture looks every bit as good as with the shutter at 1/60 s.
 
While 1080p24fps has been working flawlessly, 720p60fps is not completely reliable for me with this patch. I even bought a Panasonic class 10 gold card hoping that I wouldn't get write errors, but I still get the same amount as my Patriot class 6 card. I did similar stress tests on both cards and I got errors at the same moments. A shutter of 1/125 with my Panny 20mm at f1.7 didn't freeze, but as soon as I stopped down to 2.5, both cards froze after about 10 seconds of wild whip pans. I thought moving from class 6 to class 10 would have at least improved performance by a little bit, but I was wrong apparently.

It's reliable enough to do 60p slow motion shots every once in awhile with care though. Since I shoot mostly 1080p24fps, it won't be a big problem for me.
This has been my experience as well. SH mode shooting is much less reliable than FHD mode shooting for the same bit rate setting. In my testing I found that blackout-lpowell settings did not help reliability for SH mode compared to defaults using the same bit rate setting, and may even have made it a bit less reliable. I settled on 27 Mbps video and 29 Mbps overall as my bit rate setting for 720p. The video looks great, but it could be a bit better.
 
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Hi, kinda new here so I apologize if this is an old or stupid question. I've just installed this patch on my G2, and the video bitrates don't seem to be very high. I can see in MediaInfo that the container's maximum overall bitrate is listed at 43 Mbps, but the test videos I took around the house all came out at about 16 Mbps. One showed up at about 19 Mbps. Is this normal?
 
Normal. Bitrates only go as high as the camera's codec deems necessary. The highest bitrates happen with bushes, panning, grass, busy test charts, etc... Al
 
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