PowerShot SX220 HS - Porting Thread - page 22 - General Discussion and Assistance - CHDK Forum  

PowerShot SX220 HS - Porting Thread

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Re: PowerShot SX220 HS - Porting Thread
« Reply #210 on: 27 / June / 2011, 07:31:05 »
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(((x)<<3)/8) == (x)Thanks, I just left what was in the other port. I'll change it to avoid the unneeded calculations.

I test this line, it do not work here

#define ASPECT_GRID_XCORRECTION(x)  (((x)<<3)/8) == (x)

But this line

#define ASPECT_GRID_XCORRECTION(x)  ( (((x)<<3)/8)+60  )

work ok
Ixus 1000 HS

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Offline funnel

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Re: PowerShot SX220 HS - Porting Thread
« Reply #211 on: 27 / June / 2011, 09:00:06 »
You probably misunderstood what he ment. If you bitwise left shift by 3 it is equal to multiplying by 8. So x*8/8 is just x.

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Offline Tiz

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Re: PowerShot SX220 HS - Porting Thread
« Reply #212 on: 30 / June / 2011, 02:44:56 »
Overall, I'm pretty happy with the cam now.

The RAW mode makes it possible to produce images that almost have DSLR-like quality (lot's of post-processing required of course): http://www.abload.de/img/crw_0131-bearbeitet2dugr.jpg

My biggest gripe is the video mode. Due to the awkward 23.976p framerate I get horrible stutter on my computer monitor and my Plasma TV cannot even play the movies. 30fps or 25fps would be so much better ...

Re: PowerShot SX220 HS - Porting Thread
« Reply #213 on: 30 / June / 2011, 10:48:56 »
stutter cannot be conseguence of 24fps but of specs of your computer

the difference between 24fps and 30 or 60fps is the almost absence of blur on subjects in action and the clearer scene while panning/zooming

24fps is the cinema movies frame rate that means the videos from your sx220 will have a cine-look rather than a home camcorder.


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Offline Tiz

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Re: PowerShot SX220 HS - Porting Thread
« Reply #214 on: 30 / June / 2011, 12:21:59 »
I agree that the stutter will result from the specs of my computer. My computer is a watercooled 4 Ghz machine. I have VideoLan, SplashLite, media player home cinema, latest version of quicktime installed. My graphics card is a relatively fast ATI Radeon. My monitor is a 26 inch NEC 2690 WUXI.

I feel that my computer is fast enough but that the monitor (like almost any other computer monitor except for certain Eizo displays and maybe certain other brands) cannot play 23.976 fps without stuttering. The driver of my Radeon graphics adapter does not allow me to select 23.976p or 24p as the input frequency (only 60p can be selected).

Moreover, it seems that my Panasonic 50inch VT20 Plasma TV cannot independently play the .mov files. If I use my computer as the source, there is horrible stutter. My Radeon driver allows me to select 24p as the input frequency (but not 23p!).

Please let me know whether there is a reasonable solution to play 23.976 fps .movs. If not, this is a bad format.
« Last Edit: 30 / June / 2011, 12:27:00 by Tiz »

Re: PowerShot SX220 HS - Porting Thread
« Reply #215 on: 02 / July / 2011, 09:04:50 »
did you try conntecting the camera to your TV via HDMI to Mini Type C cable?
it works fine on mine

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Offline Tiz

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Re: PowerShot SX220 HS - Porting Thread
« Reply #216 on: 02 / July / 2011, 13:38:44 »
Thanks. I will try.

One more question: I like the battery indicator (showing the precentage). Do I have to adjust the voltage values in order to get proper percentage values or have they already been tweaked for the SX220?

Re: PowerShot SX220 HS - Porting Thread
« Reply #217 on: 02 / July / 2011, 13:58:35 »
Thanks. I will try.

One more question: I like the battery indicator (showing the precentage). Do I have to adjust the voltage values in order to get proper percentage values or have they already been tweaked for the SX220?

I think the values are correct. When you reach 0% the camera shuts down.


Re: PowerShot SX220 HS - Porting Thread
« Reply #218 on: 02 / July / 2011, 17:09:55 »
@Tiz,
If you want to try to play the videos over USB from the camera on your computer, you will surely have problems to view them properly. The bitrate is extremely high on the original video (up to over 33 Mbit).
If that is the problem, download the videos from your cam and try again. For me, VLC Mediaplayer (Videolan) works great and without stuttering.
I personally like the 23,976 fps much more than the 30fps from the sx200is. If you are using PAL on your TV, there is only one frame/sec added to the PAL specified 25 fps. On 30fps 5 frames were removed to meet PAL specs and that is really horrible.
I don't think that the monitor refresh rate has anything to do with your problems.
Not heard of such problems until now.

Try to convert the video into another container format like avi, mp4 or mkv. Most systems have problems with the mov container. You don't have to touch the h.264 video stream, only change the container.

The SDHC or SDXC Card can make problems too. For me, Sandisk Extreme 16G with 30 Mbit/sec works great ;)
SX220HS + SX200is   +  S30 + Powershot 600

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Offline Tiz

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Re: PowerShot SX220 HS - Porting Thread
« Reply #219 on: 03 / July / 2011, 11:16:24 »
I did download the videos to my SSD and then played them on my computer. Horrible stutter. I also converted the .mov to a 30fps avi. Horrible stutter.

Then I played the unconverted .mov videos via my computer on my Plasma TV (connected via HDMI). Horrible stutter.

Then I connected the camera directly to my TV (via the AV cables that came with the camera). Initially, there was a different kind of stutter. I believe the Sandisk SD card was a bit too slow (and, maybe, the movie was not correctly buffered). Then I played it once again...and NO STUTTER at all! I am absolutely happy with 23.976p IF there is no stutter/judder or whatsoever.


 

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