Need Help - Tons of motion blur on very minimal movement Red MX footage

[Alison Parker]

Hey guys, I shot a music video on Saturday on my Red MX and for the first time experienced a problem with motion blur.

There is NOT extensive motion.. I realize with a lot of big movements, blur is inevitable.. but even on my close up shots of the singers face, just him simply moving his head side to side goes blurry / smeary out of focus, whatever you want to call it.

I shot a bunch of stuff in 2k 48 frames, and that does not have the problem. However all of the 4K 24 fps footage, whether it is wide, medium or close up, has this motion blur problem.

I am told by my camera crew ( i was director ) that we used the exact same settings we always have in the past and they are stumped as to why this happened.

Any ideas as to what could have caused this, and secondly, if there's ANY way to fix it at all?

I've attached a picture example of a close up, just so you know it's minimal movement...when he's basically STILL, the picture is perfect.

[Marcus Struzina]

The problem looks like shutter angle/exposure time. Probably using 1/24 th at 24 frames or in other words a 360 degree shutter. When you switched to 48 frames of course the shutter speed would of been at least 1/48th of a sec.
Unfortunately no way to fix it that I know of.

[Eki Halkka]

The problem looks like shutter angle/exposure time. Probably using 1/24 th at 24 frames or in other words a 360 degree shutter. When you switched to 48 frames of course the shutter speed would of been at least 1/48th of a sec.
Unfortunately no way to fix it that I know of.

Might be - hard to say from a single frame. Could also be that there's nothing wrong with the footage, other than the asker noticing the motion blur (which is not an error) for the first time. The individual frames are NOT supposed to look sharp really...

[Alison Parker]

Might be - hard to say from a single frame. Could also be that there's nothing wrong with the footage, other than the asker noticing the motion blur (which is not an error) for the first time. The individual frames are NOT supposed to look sharp really...

Please check my thread on DVXUSER as well for more still grabs... it's not just in the stills, its very noticeable when watching the video..

http://www.dvxuser.com/V6/showthread...93#post2179693

[Alison Parker]

Here is what I found on the camera report for that shot in particular that u see in the still frame:

Lens - 100
Stop - 4
No Dolly
Shutter - 1/48
ISO - 800
FPS - 24

Does this make any difference to your conclusions?

[Alexander Ibrahim]

I concur. It looks like excessive motion blur.

I have the same guess as everyone else here, the shutter was too open/slow, possible 360°.

If that's the case, you can try to sharpen in post... but I wouldn't hold out much hope. That's definitely a counsel of desperation. There are some other post tricks you can try, but that will probably lead to more expense that a reshoot with dubious results. Again, a counsel of desperation.

My only trouble is that 360° doesn't normally look that blurry if the subject is as still as claimed. Just for sanity I did a quick shot with a 7D at 1080/24p 1/30 shutter... far sharper than this image or the ones I see on DVXuser.

The subject was most likely moving faster than you thought.

There may be other contributing factors... for example if there is a post accumulate or motion blur added.

You should post the a portion of an r3d file that is exhibiting this problem, so that users here can see the problem in motion in original media.

I really think the problem is on set. Its prudent to eliminate all the other potential issues before making that determination.

If it does turn out to be an on set issue, then you should plan on a reshoot.

[Gunleik Groven]

From that single frame, it's not possible to judge anything, really...

It makes sense that the 2k has less motionblur, thoughif it was set at relative shutter...

[Alison Parker]

I concur. It looks like excessive motion blur.

I have the same guess as everyone else here, the shutter was too open/slow, possible 360°.

If that's the case, you can try to sharpen in post... but I wouldn't hold out much hope. That's definitely a counsel of desperation. There are some other post tricks you can try, but that will probably lead to more expense that a reshoot with dubious results. Again, a counsel of desperation.

My only trouble is that 360° doesn't normally look that blurry if the subject is as still as claimed. Just for sanity I did a quick shot with a 7D at 1080/24p 1/30 shutter... far sharper than this image or the ones I see on DVXuser.

The subject was most likely moving faster than you thought.

There may be other contributing factors... for example if there is a post accumulate or motion blur added.

You should post the a portion of an r3d file that is exhibiting this problem, so that users here can see the problem in motion in original media.

I really think the problem is on set. Its prudent to eliminate all the other potential issues before making that determination.

If it does turn out to be an on set issue, then you should plan on a reshoot.

ok, seeing the video for yourself is a good idea, but how do i post an r3d file? i can upload a portion of a clip i've log and transfered to apple pro res 422 hq, is that okay? to youtube?

[Alexander Ibrahim]

Here is what I found on the camera report for that shot in particular that u see in the still frame:

Lens - 100
Stop - 4
No Dolly
Shutter - 1/48
ISO - 800
FPS - 24

Does this make any difference to your conclusions?

Not really.

Camera reports can be mistaken.

That report doesn't jive with your claim that there was a lot of light in the scene. That exposure would call for 24 candles of light, which is about what a computer monitor displaying a white screen puts out at 8 inches

Post the r3d.

[Alison Parker]

Not really.

Camera reports can be mistaken.

That report doesn't jive with your claim that there was a lot of light in the scene. That exposure would call for 24 candles of light, which is about what a computer monitor displaying a white screen puts out at 8 inches

Post the r3d.

for sure I will post the r3d file but how do i do it?