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500d development

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Offline Ulysses

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Re: 500d development
« Reply #2250 on: 21 / December / 2011, 08:09:51 »
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But the playback rate info in the file was changed. If Im not mistaken and remembering wrong, he left it because it wasnt really changing the frame rate, and without changing the frame rate, the change only in playback rate is useless.

As far as I remember, that was the fail on that code tweak...

Couldnt you try it, A1ex? I would try and test everything as you need. (gonna try to find the post...)
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Offline Ulysses

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Re: 500d development
« Reply #2251 on: 21 / December / 2011, 08:20:56 »
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Offline kyselejsyrecek

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Re: 500d development
« Reply #2252 on: 21 / December / 2011, 10:48:03 »
Quote from: Ulysses on 21 / December / 2011, 07:44:07
What about when Coutts did manage to change the playback rate and we thought it was frame rate?
That fix couldnt be used in this case? If so, then frame rate chaging would be complete, aside only the audio sync.

Ulysses, as Coutts said a few pages before, he was only able to change between 30 and 20fps if I understood him well. You might want to read the last messages more carefully. You should not press Alex, nobody should as he is already pretty busy, it seems, with all the work he does every day only for ML.
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Canon EOS 500D, EF-S 17-85mm f/4-5.6 IS USM
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Offline Ulysses

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Re: 500d development
« Reply #2253 on: 21 / December / 2011, 10:51:39 »
Im not pressing, of course not. He's doing us a favor, how could I be pressing him? I'm just ASKING IF he could help in that matter. Even if coutts was only able to change from 20 and 30 fps, he actually did it and that might be a clue to help solve it. Its at least a starting point.

I'm also trying to help in what I can help and I'm making myself available to tests and give info for the benefit of the project.
« Last Edit: 21 / December / 2011, 10:53:23 by Ulysses »
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Offline kyselejsyrecek

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Re: 500d development
« Reply #2254 on: 21 / December / 2011, 14:12:48 »
I have been playing with fps safe values and found that the smallest working value at least on 500D is 2fps. With 1fps it always drops down to something what is near to 4fps. I think that it is due to some data length limitations as the 15th bit from right isn't read by the camera so the leading one in number 101 1010 0111 1000 representing 1fps timer is cropped and the number then becomes 1 1010 0111 1000 what is similar to 1 0110 1001 1110 used for 4fps (reason why it seems to be changed to ~4fps according to exposure). I'm not sure this might be bypassed, though. The smallest number of fps is ~1.412 represented by 2^15 - 1 in terms of the timer. Anyways, 2fps is pretty safe :-). It may be adjusted in set_fps() in file src/fps-engio.c by replacing the 4 by 2.
« Last Edit: 21 / December / 2011, 14:15:57 by kyselejsyrecek »
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Canon EOS 500D, EF-S 17-85mm f/4-5.6 IS USM
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Offline Ulysses

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Re: 500d development
« Reply #2255 on: 21 / December / 2011, 14:36:44 »
Fewer than that I think is not that necessary as we can have timelapse and other things. The thing that would be breaktrough is higher frame rates. Did you test whats the maximum it can get? At least 24 in 1080?

500D has the same processor than 5D, 550D, etc... I think it should hold similar settings...
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Offline Chuchin

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Re: 500d development
« Reply #2256 on: 21 / December / 2011, 14:45:26 »
Here is a python script to adjust the playback fps. You can set new fps by changing the new_fps. If your using 1080 just change the current fps to 2000. You can also make this script dropable. Props to JSM for the script.
« Last Edit: 21 / December / 2011, 17:27:36 by Chuchin »
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Offline mk11174

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Re: 500d development
« Reply #2257 on: 21 / December / 2011, 14:53:11 »
Quote from: Chuchin on 21 / December / 2011, 14:45:26
Here is a python script to adjust the playback fps. You can set new fps by changing the new_fps. If your using 1080 just change the current fps to 2000. You can also make this script dumpable. Props to JSM for the script.
Very nice, thankyou, it will make it quicker then the hex editor at least, awsome job!
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Offline kyselejsyrecek

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Re: 500d development
« Reply #2258 on: 21 / December / 2011, 14:53:50 »
Quote from: Ulysses on 21 / December / 2011, 14:36:44
Fewer than that I think is not that necessary as we can have timelapse and other things. The thing that would be breaktrough is higher frame rates. Did you test whats the maximum it can get? At least 24 in 1080?

500D has the same processor than 5D, 550D, etc... I think it should hold similar settings...

Yes, in fact, it was me who has prompted Alex those upper limits (see http://chdk.setepontos.com/index.php?topic=5971.msg78224#msg78224)

It is probably the sensor that is not able to serve higher bandwidth as Alex said.

Chuchin, thank you.
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Offline gedas5

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Re: 500d development
« Reply #2259 on: 21 / December / 2011, 15:51:43 »
@ Chuchin

I installed Python 3.2.2, drag and drop file on the qthackfps.py file and nothing happens :) am I doing something wrong? :)
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