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Old Dec 4, 2009, 6:17 AM   #1
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Default Does anyone know why the SD940 does not play movie smoothly?

Hi. I recently bought a Canon SD940. I tried the movie mode using the option of 1280x720 HD quality. After downloading and playing it on the computer, I noticed that it doesn't play smoothly. It seems it was better shooting it at 640x480 which was described as standard mode.

Does anyone know why it doesn't play smoothly? How do I correct this?
Also what is the difference between HD and standard? They seem to look the same except that I see that the width of the one shot at 1280x720 when played back from the computer is wider than the 640x480.

Thanks in advance.

Last edited by wanderintraveler; Dec 4, 2009 at 6:21 AM.
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Old Dec 4, 2009, 7:02 AM   #2
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Were you moving as you shot the video, or using a tripod? The image stabilization feature using the Digic 4 processor does a great job if you are walking shooting photos but walking shooting video (or moving) seems to affect the quality.

Are you connecting the camera to the TV via A/v cabling or mini hdmi to HDMI?

Is the TV high definition?
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Old Dec 4, 2009, 7:20 AM   #3
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Yes I was moving but not fast. No I wasn't using the tv to view the video. I was viewing from the computer. I was moving the same way when I shot using the 640x480 mode.
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Old Dec 4, 2009, 12:51 PM   #4
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Playing back 1280 x 720 PIXELS will stress your pc much more then 640 x 480 will. Just about twice as much.

For optimal performance use a mini HDMI to HDMI cable for 720p "performance." Provided the TV has an HDMI port and is high definition.

1280 x 720 is 720p HD. It will look bad on a slower pc or a tv that is not high definition.

(LCD monitors are not NATIVELY 1280 x 720, the "native" resolution on an lcd monitor will look the best, the cpu speed is also another factor.)

Last edited by NewSD780IS; Dec 4, 2009 at 12:54 PM.
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Old Dec 4, 2009, 7:11 PM   #5
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I'm planning to get a new computer soon, so what specs or requirements in a computer that are needed to play HD? Thanks again.
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Old Dec 4, 2009, 7:40 PM   #6
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I'd say a 2.0 Ghz or faster CPU, preferably at least a dual core.

2 gigs of system ram or more I'd recommend.

17" WIDESCREEN monitor or larger, if monitor is an LCD it must be widescreen. Non native resolutions displaying on liquid crystal display will distort the image. If u go LCD you want 16:9 or 16:10 widescreen format (NOT 4:3)

THE IS (image stabilization) is more effective (playback is smoother) if you move VERY slightly while shooting video.
If you have a tripod the quality will be better yet.

Last edited by NewSD780IS; Dec 4, 2009 at 7:43 PM.
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Old Jan 4, 2010, 3:06 AM   #7
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i had similar problems with my other computer, it was just too slow for high quality video.(3Ghz celeron)

Buy a computer with a decent dual or quad core processor, at least 2gigs of memory, and a decent graphics card.

My newer 2 years old computer with intel E8400 dual core processor plays 1920x1080 videos just fine.
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