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Sony Alpha Mirrorless and DSLR
Sony Alpha a7s: Full HD Recording in XAVC and 4:2:2 UHD 4K Output via HDMI.


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Old November 7th, 2014, 03:38 PM   #1
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SEMA Show on A7S

A rapid-fire edit from one day at the SEMA show in Vegas. Shot on the A7S with a small JAG35 shoulder rig. (and a couple tripod shots at the rallycross.)

I made minor color adjustments to some of the more horrendous lighting offenses because, of course, inside a conference center is some of the worst lighting around. For the most part, color is what it was out of camera (I shot locked at 5500 kelvin.) ISO was set between 800 and 3200. (I think a couple are as high as 8000 but I can't tell which ones at this point, to be honest.) The few slow-motion shots you see are just 1080/60p in APS-C mode and straight out of camera.

Once again, damn impressed by this tiny camera. Oh, and I compared weight to a friend's C100 (holding one in each hand - so highly unscientific). The A7S with a MovCam cage, Jag35 rig, Rhode shotgun, LEA4 adaptor with Tamron SP 24-70 2.8 and a Juicelink box weight exactly the same as a Canon C100 with only a Canon L 24-70 f/2.8. That surprised me.

SEMA Show Day 2: GRC Finals! Stars! Cars! - Driving Sports TV
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Old November 10th, 2014, 10:29 PM   #2
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Re: SEMA Show on A7S

LOL. Went to the link to watch and it told me that it was my last 'freebie' for the week.

Good video, though sadly there was no HD option for viewing.

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Old November 11th, 2014, 10:22 PM   #3
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Re: SEMA Show on A7S

Heh. Yup. :)

The video system streams based on bandwidth available. After a few seconds it switches to HD if possible. (Ymmv)
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Old November 12th, 2014, 12:49 AM   #4
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Re: SEMA Show on A7S

I can get 4.5Mb/sec down through my cable connection. Didn't see no stinkin HD button appear. :-)

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Old November 12th, 2014, 01:23 AM   #5
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Re: SEMA Show on A7S

Button never appears. It's automagic.
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Old November 13th, 2014, 10:26 AM   #6
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Re: SEMA Show on A7S

HD works for me, at about 10 seconds in it switches to 2.4Mbps HD from 600kbps SD.

I was at SEMA but it's interesting seeing it from another view.
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Old November 13th, 2014, 10:34 AM   #7
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Re: SEMA Show on A7S

Just had another look and it worked for me. I guess I was just too impatient to watch it at full-screen long enough for the HD streaming to kick in. :-)

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Old November 15th, 2014, 02:45 AM   #8
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Re: SEMA Show on A7S

I hate these auto switching HD video viewers. Vimeo does this too on mobile devices.
I do most of my forum reading/posting on my iPad Air. For some reason many (most) times it never switches to HD. Even though once it does, my connection has no problem streaming it.
This one never did so can't say much as non HD looks like pixelated garbage on the iPad Air.
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Old November 15th, 2014, 03:12 AM   #9
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Re: SEMA Show on A7S

The joys of Mpeg DASH? I'm sure it was a good idea at the time.

Dynamic Adaptive Streaming over HTTP - Wikipedia, the free encyclopedia

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Old November 16th, 2014, 10:03 PM   #10
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Re: SEMA Show on A7S

Depending on the device you're using, its either RTSP or HLS. These both stream dynamically, which improves asset security since the whole file is never downloaded. Our official Driving Sports TV app allows folks to download "favorites" to the local device. Which is really the best way to few things anyhow. But, I guess this is getting a bit off track now. ;)
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