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Panasonic TM700 fast re-encode 1080p60 to 480p MP4?

post #1 of 6
9/27/10 at 1:03pm
Thread Starter 
No editing needed, just quick re-encode would be fine.

Why I want it:
I have the original 1080p60 m2ts files, and I want to share the videos with friends in another continent (they only have basic DSL ~1.5Mbps, and no access to Youtube). 480p MP4 seems a good trade-off for size/quality, and 30 frames/second should be enough.

I've read the two huge threads about TM700, and various others, it seems my choices are:

1. Upload raw file to Youtube and download mp4 files.
2. use HD Writer AE, the camcorder will do the conversion? so it's faster.
3. use general encoding softwares.

Would you like to share some experience? Thanks a lot!

I have experience in HD encoding and I know it's CPU intensive. So if I go choice 3, I'd like to get GPU accelerated encoding.
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post #2 of 6
9/27/10 at 7:50pm
Your friends have access to the Internet, but not to YouTube?
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post #3 of 6
9/27/10 at 10:00pm
Thread Starter 
Quote:
Originally Posted by Ungermann View Post

Your friends have access to the Internet, but not to YouTube?

Yes. See wikipedia Youtube Blocking
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post #4 of 6
9/30/10 at 7:01pm
I did a quick test for you on coverting 1080P60 to 480P30. Using Panasonic's software, on my PC it coverts the file at 1.4x faster than real time. I also tried Handbrake, which ran at only 95% real time (inefficiently only using one core of my CPU). Not only was Panasonic's processing faster, I prefered the quality for the same file size, although mine was only a super fast test, so you might want to check for yourself.

This was all CPU encoding, not using the camera connected. I know the camera being connected dramatically accelerates 1080P60 to 1080i60 conversion, I don't know what difference it makes when coverting to 480P30.

Roland.
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post #5 of 6
10/1/10 at 11:00am
Thread Starter 
Thanks a lot!!!
1.4x sounds amazing, what's the CPU on your PC? how many cores are used by Pana's software?

Quote:
Originally Posted by rpwooste View Post

I did a quick test for you on coverting 1080P60 to 480P30. Using Panasonic's software, on my PC it coverts the file at 1.4x faster than real time. I also tried Handbrake, which ran at only 95% real time (inefficiently only using one core of my CPU). Not only was Panasonic's processing faster, I prefered the quality for the same file size, although mine was only a super fast test, so you might want to check for yourself.

This was all CPU encoding, not using the camera connected. I know the camera being connected dramatically accelerates 1080P60 to 1080i60 conversion, I don't know what difference it makes when coverting to 480P30.

Roland.
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post #6 of 6
10/1/10 at 6:18pm
Quote:
Originally Posted by junda View Post

Thanks a lot!!!
1.4x sounds amazing, what's the CPU on your PC? how many cores are used by Pana's software?

It is hard to tell the true core / thread count. I would say between 3 and 4.

I have a Gulftown processor, the Core i7 980X, clocked to 4.3GHz, yup, a rather nice system :-)

It runs at only about 27% utilization when using the panasonic software for format conversion from 1080P60 to 480P30 which as utilization is measured over 12 threads, that would indicate a little more than 3 threads are being used.

Roland.
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