S5IS - Ported!

nicnack

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. 😀

stevodude

migajekI mean the video compression.. Will it be ported?

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

wap4

stevodude
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.

migajek

wap4
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.

wap4

migajek
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).

goodgnus

What does this mean for other DRYOS cameras, such as the SD950IS?

Would love to run CHDK...

abramburici

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

fe50

Hello & welcome Alan,

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."

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...

DataGhost

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.

abramburici

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.

fe50

abramburici
...Now regarding the ISO overriding, I still can't find it, sorry... 😀 I mean I can't find extra-photo operations either.

Which version (or name of the download file) you are using ?
Looks like you do not have the Allbest version; the latest Allbest Autobuild (beta version) you'll find here: Autobuild CHDK version.
(In the Allbest CHDK "Extra Photo Operations" is the first entry in the menu...)

crazyfred02

Hello!
I am new to using chdk firmwares but I LOVE it!
However I have a small problem that deals with bracketing.
I have figured how to get it working with EV mode, which is what I wanted, however, when I select +/- and put the aperture at 5.0 I get approx. 11 images but a lot of them are taken at the same fstop. Also when it gets to the last setting (highest fstop) it doesnt stop automatically as I read it should..
I am wondering if this could be a bug..
Hope to get a response from someone... it would be great!

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