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Old August 20th, 2011, 12:03 PM   #1
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Why does AVCHD produce less heat in HDSLRs?

I just saw a video at Video University. They were reviewing one of the Pansonic HDSLRs. He said that one of the benefits of the camera is that it recorded video in AVCHD format, and then said that one of the benefits of AVCHD was that the camera didn't experience the overheating problems that other HDSLR's do.

I have considered HDSLR, but have not made the jump since two issues I face are:

1. I shoot documentary interviews. I shoot the interview twice in each sitting, so they're usually in the 20-30 minute range, sometimes longer. It wouldn't be a good idea to interrupt the interview so the camera could cool.

2. I produce two half hour TV programs. We only get a limited amount of time in the Public Access studio, so we'll shoot two to three episodes in a single sitting. I have to set up an overhead camera that I can't touch until after the shoot is completed (I use a JVC Everio 3CCD with a 60 GB Hard Drive).

Now to my question. Why would recording AVCHD onto an HDSLR produce less heat than other recording formats?

Regards,

Toby
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Old August 20th, 2011, 05:05 PM   #2
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Re: Why does AVCHD produce less heat in HDSLRs?

AVCHD has NOTHING to do with the heat issue - Sony's A580 and A33/55 have heat issues AND are recording AVCHD.

Heat is produced by the internal chips passing lots and lots of electrons around, very fast... and in the case of the Sonys, the active image stabilization components, which worsen the problem, they record longer with active stabilization off.

Each manufacturer tries to balance performance and quality vs. customer expecations. If there are enough complaints about short clip time, and the technology allows, the heat issue will eventually be "fixed" in later cameras. My understanding is that the Panasonic cameras already don't have the issues, for whatever reasons and design decisions that the engineers made.

AVCHD is a format for recording an audio visual data stream. It's notoriously resource intensive, but also seems to work pretty well... other than requiring lots of horsepower for encoding and decoding (which will create heat from the "process"), heat really isn't a factor.

And BTW, not everything you see or hear or read on the web is accurate, same goes for print media and manufacturer marketing pitches....
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Old August 21st, 2011, 10:21 AM   #3
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Re: Why does AVCHD produce less heat in HDSLRs?

Quote:
Originally Posted by Toby Younis View Post
...one of the benefits of AVCHD was that the camera didn't experience the overheating problems that other HDSLR's do.
Due to the mechanical design of the camera in question. Has nothing to do with the codec.
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Old August 22nd, 2011, 01:12 PM   #4
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Re: Why does AVCHD produce less heat in HDSLRs?

Thanks guys.

That's what I thought, but I figured I might have missed something along the way.

Regards,

t.
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Old September 2nd, 2011, 11:46 PM   #5
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Re: Why does AVCHD produce less heat in HDSLRs?

Reports are that the latest Canon offeris 600D and 60D do not have heat issues. That's why I bought a 60D and am selling my T2i. No issues with the 60D for me. There are heat issues reported with the 5DII, 7D and T2i.
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