Sorry, but I have another question regarding the "mud" issue.

S

seven.b

Well-known member
I don't mean to beat this topic to death, but I shoot a lot of action sport videos/films and I am looking at getting the GH1 as a second cam. I just need to know if the mud issue happens when the camera itself is moving fast (like a quick pan or excessive shaking) or if say a mountain bike rider is riding past the stationary camera at a fast pace. Which one is it? Or is it both?

Thanks.
 
chances are you should shoot 720/60 and fugetaboutit.

Depending on your shutter and rider speed (motion blur) I believe you'd get quite good locked down shots 1080. You'll have to look very hard to see breakdowns.
 
Mud occurs in 720p occasionally to.

It only happens when you jerk the whole camera about, or move the whole scene dramatically from one frame to the next very quickly.

An object moving through the scene whilst the camera is on a tripod, static, is not enough to make mud happen.
 
Mud is always here, less noticeable in 720p (as many post in this helpful forum) but still here, just hidden by motion blur, one of the solution is to shoot at 1/50 - 1/60 to "avoid" it. Now I go wear my bulletproof jacket :D
 
Do not shoot 1/50th in 720p AVCHD. It will force the camera into 30p mode. Use 1/60th or faster.

If you're shooting in MJPEG mode, you can use 1/50th, as the overall frame rate is already 30p in MJPEG mode.
 
Does mud reduce in 1080p with higher shutters, say 200-250, just wondering?

Also, why does the camera force into 30p below 1/50-1/60(us/pal), are you sure?
 
No, it gets worse with high shutters.

Also, why does the camera force into 30p below 1/50-1/60(us/pal), are you sure?
Click to expand...
Of course I'm sure. In the NTSC version it'd go to 720/30p, in the PAL version it would go to 720/25p. It still RECORDS 50 frames per second, but it only delivers 25 unique individual frames.

You cannot have a shutter speed longer than your frame rate, that's against the laws of the universe. It cannot be. If each frame is going to appear on your desktop for exactly 1/60th of a second, how can you imagine that you could expose that frame for 1/50th of a second? It'll be gone long before your exposure is done!

So, the cameras hold the frame long enough to finish the exposure. And if that means that frames are dropped, then frames are dropped. So each frame gets held long enough to finish the exposure, and when the next frame comes along 1/60th of a second later the current frame says "sorry, go away, I'm busy". It gets held until it's done exposing.

Meanwhile, the recorder is still needing 60 fps, so it records the last fully-imaged frame. If the current frame is taking too long, it'll record the last one that was finished a second time.
 
Barry while on subject of shutter speeds..does the 1080p in theory do better low light because you can shoot at a slower shutter because it's 1/60? If so what's the lowest shutter? 1/24...? Is that an option? GH1 seems to have bizare shutter numbers.
 
Yes you could get more light into the camera in 1080p mode, because you could use a lower shutter speed (at the compromise of frame rate). You could get very close to the same shutter speed in 720p mode, by using 1/30th, but that would limit you to 30p -- then again, when shooting 1080p you're limited to 24fps, so you'd get slightly less sensitivity with 720 in exchange for 25% more frames per second.
 
Well my workflow consists of violating gods law and forcing my 720p/60 footage to carve out a menial existence of 24p footage anyway...so I have no problem shooting 1080 in the dark...25% more frames (30p) isn't an advantage in this situation as I positively draw the line at 30p-->24p. If I wanted to deal with that can of worms I would have saved some more money and gotten a 5DmkII...ok probably not.
 
Regardless of what happens with that what if you shoot like that, put it in 60p timeline, looks ok...then when you drop your 1/60 footage in it's super smooth.
 
Shooting 60P with 1/25 shutter results in 20P playback. I confirmed that by downloading the Shadowplay movie from the thread you linked to and stepping through it. I couldn't find any example of it gaining the extra 5 fps in playback.
 
You must log in or register to reply here.
Back
Top