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XDCAM EX1 Hands-On - Night Footage Compression Examples
Published by Matthew Jeppsen January 8th, 2008 in Cameras, Formats, FreshDV, News, ResearchThis article is part of a series of tests FreshDV conducted with the Sony XDCAM PMW-EX1. Thanks to Miami rental house and Sony dealer Midtown Video for providing a XDCAM EX camera. And thanks to DSC Labs for providing test chart patterns. You can read more about ours and others experiences with this camera here.
One of the areas that the new Sony XDCAM PMW-EX1 really excels is in native light sensitivity. Night shooting with the EX is relatively simple, as the camera seems to find illumination and color saturation in even the darkest of scenes. Here are a few examples of night footage shot with the EX1, including a 60p overcranked shot. I have included a half-resolution H.264 version to show the context of the “full scene.” Each H.264 version is paired with a clip excerpt that has been preserved in it’s native XDCAM format. This gives you a short native-format full-resolution clip that you can drop in your editing software of choice and tweak, push, destroy, whatever. The only compression difference between these full-rez excerpts and what came directly off the camera is the addition of a text overlay to document camera settings. I have confirmed this by overlaying them over the source clips with a composite difference mode applied. So here’s a chance to analyze how the XDCAM SP and HQ codec performs at night in both slow and fast motion scenes. Note how the vertical lines in closeups of the overcranked shot seem to distort/lean…we’ll have more on the EX’s vertical skew in a article coming soon.
720/24/60p Overcranked Night Run Full (Compressed H.264) [0:25m]: Download
720/24/60p Overcranked Night Run Excerpt (Native XDCAM HQ) [0:08m]: Download
1080/24p Night Traffic Excerpt (Compressed H.264) [0:40m]: Download
1080/24p Night Traffic Excerpt (Native XDCAM HQ) [0:10m]: Download
1080/60i Night Alley Full (Compressed H.264) [0:38m]: Download
1080/60i Night Alley Excerpt (Native XDCAM SP) [0:10m]: DownloadThanks again to both DSC Labs and Midtown Video for making this EX1 test series possible. Stay tuned here or at our EX1 link page for more test results.
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man look at the rolling shutter problems. the verticals all start to lean way over when panning too fast. it even varies with the pan rate… uh EX1, no thanks, nice try though.
As we noted in our podcast discussion on this topic, it really depends on how you will use the camera. If you’re gonna be shooting fast motion shots from a 90-degree angle like this particular shot…then yes, I agree that the EX1 is probably not the right choice for you.
http://www.freshdv.com/2008/01/xdcam-ex1-hands-on-first-impressions-podcast-discussion.html
-Matt Jeppsen