Odyssey 4KtoProRes vs. AVCHD comparison video

jpardon

jpardon

Active member
Hello--

Been doing quite a few doc shoots using the 7Q's 4K-to-ProRes feature lately. During these shoots I've been recording simultaneously to AVCHD for backup purposes.

Here's a comparison video that shows the (obvious) differences between the 7Q's ProRes 422 HQ and the FS-700's AVCHD.

http://vimeo.com/99392843

 
nice videi...this option on the odyssey 7q is the best thing odyssey 7q has to offer right now...


jpardon said:
Hello--

Been doing quite a few doc shoots using the 7Q's 4K-to-ProRes feature lately. During these shoots I've been recording simultaneously to AVCHD for backup purposes.

Here's a comparison video that shows the (obvious) differences between the 7Q's ProRes 422 HQ and the FS-700's AVCHD.

http://vimeo.com/99392843

Click to expand...
 
Very cool comparison. I'll have to check mine, you can still set a pp or cinegamma recording internally whilst 709 externally?

i guess that's not a fair comparison though. if these are both ungraded 709, then that is the right comparison. To me the external looks like some saturation push and blacks crushed a little, which you can do with a cinegamma internally. I don't think I've ever shot 709 straight internally. You are right though, the detail, no moire or aliasing, ability to push it in post. That's what stood out to me in comparison aside from the "look".

Is 709 internally really that milky looking? Feels more like ungraded flatter slog.
 
I suggest to do some additional shots in situations with more contrast e.g. sunny bright light and shadows. For me REC709 is not useful as highlights clip fast and shadows crush as mentioned above. I never shot REC709 internal for the same reason but on the 7Q gamma is still higher and it also suffers from magenta edges on hard lights .
 
Interesting and thanks for posting. To me eyes, the 7Q adds a blue/lime sherbet tint as well as adding a bit of a rough contrast look. Yes, the AVCHD has less detail and the bit of milkyness, but I think it is producing and overall more pleasing image compared to the 7Q (in this video). In my view, the 7Q footage should look the exact same as the internal recording only better. The presence of a shift seems odd to me and would cause one to setup the camera differently when using the 7Q.
 
The problem with looking at 4KtoProRes on a web video is that you lose almost everything you gain in detail in the re-encoding. How can you judge the difference in quality when you re-encode with a process that actually look worse than AVCHD? Of course you could say that this is the way most people will be looking at your footage, so what's the point?

Perhaps, but when viewing the native files, the difference in quality is quite astounding. I just don't know how you can show it with a web video.
 
Ericjurg said:
The problem with looking at 4KtoProRes on a web video is that you lose almost everything you gain in detail in the re-encoding. How can you judge the difference in quality when you re-encode with a process that actually look worse than AVCHD? Of course you could say that this is the way most people will be looking at your footage, so what's the point?

Perhaps, but when viewing the native files, the difference in quality is quite astounding. I just don't know how you can show it with a web video.
Click to expand...

That's a fair point, Eric: the Vimeo H.264 will never be able to show all of you out there exactly what I'm seeing in the edit suite. You'll just have to trust me! This is why I included some commentary at the end of the video to hopefully help to explain some of the things that I'm seeing in the fine details. I suppose my "point" was to show what is possible to show via Vimeo, and explain the rest verbally.
 
Clermond said:
I suggest to do some additional shots in situations with more contrast e.g. sunny bright light and shadows. For me REC709 is not useful as highlights clip fast and shadows crush as mentioned above. I never shot REC709 internal for the same reason but on the 7Q gamma is still higher and it also suffers from magenta edges on hard lights .
Click to expand...

I do plan to do some S-Log2 shooting next month and will post some of it to this forum, Clermond.
 
jpardon said:
I do plan to do some S-Log2 shooting next month and will post some of it to this forum, Clermond.
Click to expand...

My comment might have been misleading. I have done this comparison both in REC709 and sLog already that's why I recommended to shoot again REC709 in bright sunlight. You shot all in subdued light without bright highlights and without low shadows. That's why the 7Q looks more pleasant but it's not significant in general. 4K2HD REC709 blows the highlights and crushes the shadows (and also pushes purple egdes). Before you start using 7Q REC709 for a paid job you should run a test in more extrem lighting conditions.
 
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