Variable Video Compression in A720IS Finally Done! - DryOS Development - CHDK Forum

Variable Video Compression in A720IS Finally Done!

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Offline wap4

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Variable Video Compression in A720IS Finally Done!
« on: 12 / March / 2008, 05:54:52 »
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    I'm interested to have variable video compression feature in A720IS. It is now clear to me that the
    function Task_MovieRecord is central to movie recording.    
    @Ewavr, can you give a clue what the 10 "jumptables" numbered from 0 to 9 in the function mean?
    (I don't have much knowledge of IDA and ARM ASM. Please forgive me if I seem like an idiot!)
    
   
 
« Last Edit: 11 / April / 2008, 09:17:25 by wap4 »

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Offline wap4

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Re: Queries regarding some DryOS functions
« Reply #1 on: 14 / March / 2008, 11:04:31 »
  DELETED!
« Last Edit: 14 / March / 2008, 13:40:04 by wap4 »

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Offline wontolla

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Re: Queries regarding some DryOS functions: Please help
« Reply #2 on: 14 / March / 2008, 11:31:00 »
Come on man! Don't be so demanding!

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none is going to help!
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Attention Allbest,at least say something!
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It is the 2nd time I'm reporting the same bug

Those guys do what they can. It is impossible for them to answer every single question.

BTW, if you found yourself the answer, why don't you post it so the next pal doesn't have to: "I've to discover on my own"?

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Offline wap4

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Re: Queries regarding some DryOS functions
« Reply #3 on: 26 / March / 2008, 10:28:22 »
 Sorry,I found that I've not studied ewavr's movie_rec.c extensively and thought wrongly that it would be easy
to implement variable bitrate feature.It seems that lot of work has to be done i.e. figuring out which functions to
modify that are called from task_movierecord,then further modifying the functions contained in the function we
wish to modify. The structure of Task_MovieRecord has also been changed in DryOS so it is not easy to figure out
(for me) what to change.In short, I apologize for my ignorance and impatience shown so far!
« Last Edit: 27 / March / 2008, 00:38:17 by wap4 »


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Offline ewavr

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Re: Queries regarding some DryOS functions
« Reply #4 on: 26 / March / 2008, 13:31:13 »
Well, test version for A720 with movie compression options and optical zoom - http://ewavr.nm.ru/chdk/for_test/allbest-a720-100c-47.zip (sources included).
I will be very surprised if that would work  ;)

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Offline wap4

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Re: Queries regarding some DryOS functions
« Reply #5 on: 27 / March / 2008, 00:35:31 »
   Thanks a lot for your reply and progress so far,but I can't see the 'video parameters' option in the testbuild. It is
   neither in main menu,nor in miscellaneous stuff submenu!
« Last Edit: 27 / March / 2008, 00:37:40 by wap4 »

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Offline ewavr

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Re: Queries regarding some DryOS functions
« Reply #6 on: 27 / March / 2008, 04:22:24 »
Ahh! This was my mistake, file re-uploaded, please try download it again.

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Offline wap4

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Re: Queries regarding some DryOS functions
« Reply #7 on: 27 / March / 2008, 04:30:03 »
Right now,I am in my college.I'll download and test it when I return home and definitely report it after 3 hrs. 
Again,thank you very much!
« Last Edit: 06 / April / 2008, 04:32:56 by wap4 »


Re: Queries regarding some DryOS functions
« Reply #8 on: 27 / March / 2008, 05:50:24 »
Ahh! This was my mistake, file re-uploaded, please try download it again.

Hi, I still couldn't find video options anywhere in the menu. Besides, file browser doesn't work with any of the new builds since Allbest's 37. I have an A720IS. Any ideas?

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Offline ewavr

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Re: Queries regarding some DryOS functions
« Reply #9 on: 27 / March / 2008, 06:14:46 »
Damn! Re-compiled and re-uploaded again.
Even if no movie parameters menu appears, video recording works?

edit: And now re-uploaded again: problem with filebrowser must be resolved.
« Last Edit: 27 / March / 2008, 06:27:36 by ewavr »

 

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