S5IS - Ported! - page 11 - DryOS Development - CHDK Forum
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S5IS - Ported!

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Offline nicnack

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Re: S5IS - Ported!
« Reply #100 on: 16 / April / 2008, 06:39:54 »
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Just uploaded the S5is CHDK to my camera, and all I can say is WOW!

A whole wealth of new possibilities has now opened up.

Thank you DataGhost and to all the other people involved in this project,
everyone's hard work and determination is greatly appreciated.

Thank you. :)
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Offline stevodude

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Re: S5IS - Ported!
« Reply #101 on: 21 / April / 2008, 07:24:23 »
Quote from: migajek on 13 / April / 2008, 05:23:00
I mean the video compression.. Will it be ported?

I'm interested in the progress of this also...
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Offline wap4

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Re: S5IS - Ported!
« Reply #102 on: 26 / April / 2008, 11:08:42 »
Quote from: stevodude on 21 / April / 2008, 07:24:23
I'm interested in the progress of this also...

Well,this is not so simple as the hooking of A720/A650 as there are lot more different functions in S5IS so that the task becomes more difficult. I tried to make analogy between the subs called in A720IS's movie_rec.c and S5IS's subs. While I succeeded to match few subs of beginning and end portion of the full XREF tree,a large portion in the middle is unexplored as this portion has lot of XREFs and the subs there are not analogous to A720's subs. Maybe some LED blinking experiment has be made to find the correct path? For this the developer must have an S5IS in hand.
« Last Edit: 27 / April / 2008, 09:24:06 by wap4 »
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Offline migajek

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Re: S5IS - Ported!
« Reply #103 on: 29 / April / 2008, 11:06:31 »
Quote from: wap4 on 26 / April / 2008, 11:08:42
For this the developer must have an S5IS in hand.
That is why I'm asking here, in hope that the Developer will answer ;)
IMO that's very important feature, as the quality of the video is very good, but the size isn't reasonable. I've been playing with video compression on my PC using ffmpeg, and it seems that I'm able to compress the video up to 8 times smaller file, with no visible affects.
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Offline wap4

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Re: S5IS - Ported!
« Reply #104 on: 01 / May / 2008, 09:25:39 »
Quote from: migajek on 29 / April / 2008, 11:06:31
I've been playing with video compression on my PC using ffmpeg, and it seems that I'm able to compress the video up to 8 times smaller file, with no visible affects.
Don't expect the efficiency like MPEG format by lowering bitrate/quality settings,you will be disappointed.  ;)

Remember the codec used by the camera is still the very old and inefficient M-JPEG,i.e. just a sequence of independent jpegs(Unlike mpeg, where interframe compression is used). Developers are changing only the compression in those JPEGs,not the codec.  But that will significantly reduce the quality if you want to use 1/8x of the default bitrate. You will end up with movies that are full of JPEG artifacts.

IMO the real use of it is to enjoy clear artifactless video by using 2x bitrate (of course if you shoot short cilps only and value quality more than quantity).   
« Last Edit: 01 / May / 2008, 09:48:03 by wap4 »
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Offline goodgnus

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Re: S5IS - Ported!
« Reply #105 on: 12 / May / 2008, 00:04:28 »
What does this mean for other DRYOS cameras, such as the SD950IS?

Would love to run CHDK...
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Offline abramburici

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Re: S5IS - Ported!
« Reply #106 on: 25 / June / 2008, 05:41:07 »
Hi folks,

Got the 1.01b firmware last night, great work!
I'm completely new to this kind of thing so I still don't fully understand what I am doing, nevertheless I stumbled upon several nice option such as raw, shutter speed and aperture overriding. I can't seem to find the ISO overriding option though, where is it and what's the name?
I understand it's not possible to get anything higher that 800, but that's not what I am looking for anyway. My idea was to use ISO even lower than 80 (e.g. 50) in combination with long exposure times (> 15 sec) in order to get almost noise-free night shots. Not sure it would work though...
Oh, and speaking of long exposures, I tried 65 sec just for the goof and I noticed something strange.. the top-left of the image appears blue even though there's no blue light source/object there. Is the S5 sensor that bad?

Cheers

Alan
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Offline fe50

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Re: S5IS - Ported!
« Reply #107 on: 25 / June / 2008, 16:59:34 »
Hello & welcome Alan,
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I can't seem to find the ISO overriding option though, where is it and what's the name?

You'll find it in the CHDK menu "Extra Photo Operations" --> "Override ISO value"

Hint: quote  from the wikia, Allbest Firmware Usage:
"When changing values in any CHDK menu options or script-variable selections you may use the zoom-rocker toggle to quickly switch between changing the 1s, 10s, 100s, 1000s, and 10,000s unit. A red-highlighted indicator will appear in the upper left of your EVF/LCD to let you know which unit you are changing."

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Oh, and speaking of long exposures, I tried 65 sec just for the goof and I noticed something strange.. the top-left of the image appears blue even though there's no blue light source/object there. Is the S5 sensor that bad?

I have no S5, but this seems to be sensor noise, caused by heat parts near the sensor...

On exposures > 1 seconds normally a dark frame subtraction is done (by the Canon firmware), you can control this in the CHDK menu "RAW Parameters" --> "Noise reduction", it's for RAW and JPG files, see Wikia: RAW parameters menu.

Perhaps one of the S5 users can be more helpfull...

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Offline DataGhost

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Re: S5IS - Ported!
« Reply #108 on: 25 / June / 2008, 18:33:02 »
Completely normal indeed, crappy build quality. You should see the *REAL* amount of hotpixels, the camera already does a lot of hotpixel remapping even without CHDK. At long exposures, the upper-left corner turns blue/purple-ish as with almost every CHDK-compatible camera, as far as I've seen. If you enable noise reduction, it'll do a darkframe subtraction which does a decent job at cancelling it out but you'll lose a lot of detail because the noise is so extreme.
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Offline abramburici

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Re: S5IS - Ported!
« Reply #109 on: 25 / June / 2008, 20:26:45 »
Hi,

The noise reduction thing indeed works, thanks for the tip.
Now regarding the ISO overriding, I still can't find it, sorry... :) I mean I can't find extra-photo operations either.
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