GH3 Dropped Frames at 60 FPS?

I

Ianscreations

Well-known member
I am using Sandisk 45 mb/s Class 10 cards. I have been shooting some sporting events at 60FPS, 1080p using my GH3 for a client. (Not using the Intra codec). Anyway...they have reported that "a lot" of the footage has dropped frames and suggested I get faster cards.
I briefly checked the footage myself but didn't find a problem...haven't spent much time looking though.
I'm wondering if the problem occured in my delivery to the client using a zipped folder of the .mov footage and then a ftp server to deliver?

Does anything think it could possible be my cards? Any other ways I can check other than watching and trying to conform the footage to 24 fps?
 
I'm willing to bet that your clients are watching them on a system that can't keep up or display the files properly, and the image is likely stuttering, and they're attributing it to problems with your camera.

Best way to proceed would be to download the actual zipped file you sent to them, unzip it, and watch down the files, and maybe even step through them frame by frame. Highly unlikely (I'd even say impossible) that the zipping / uploading process would cause "dropped frames." However, by downloading the zipped file, you'll be looking at the exact same files they are, and that eliminates any oversight with your exporting / delivery process.

I should say that it certainly is possible that they're right and that your cards / camera are the issue, but I'd say it's less likely than "client error."
 
I use the same card and shoot at mov 60fps and never get dropped frames. I also use a 40mb/s card and never get dropped frames so i doubt its the card.
 
hoju said:
I'm willing to bet that your clients are watching them on a system that can't keep up or display the files properly, and the image is likely stuttering, and they're attributing it to problems with your camera.

Best way to proceed would be to download the actual zipped file you sent to them, unzip it, and watch down the files, and maybe even step through them frame by frame. Highly unlikely (I'd even say impossible) that the zipping / uploading process would cause "dropped frames." However, by downloading the zipped file, you'll be looking at the exact same files they are, and that eliminates any oversight with your exporting / delivery process.

I should say that it certainly is possible that they're right and that your cards / camera are the issue, but I'd say it's less likely than "client error."
Click to expand...



Great idea. I will unzip the files tonight and load them. Thanks for your help!
 
I've looked at both files, and there's definitely something going on with them. It doesn't seem like a "dropped frames" issue, but rather, a setting / encoding issue.

The cadence to both files is off, as opposed to some occasional dropped frames that you'd see with a misformatted card or data rate issues.

If you step through the 24fps file, you'll see that it's actually at 12fps but conformed to 24fps. So basically, every frame is repeated, thus making it 12fps x 2 = 24fps.

With the 60fps file, it's also off, but again, it seems like an encoding or settings issue. Stepping through it, the file doesn't advance every frame.

My suggestions:

1. Look at the original camera files.
2. Make sure you're shooting progressive and not interlaced (assuming that's your intention).
3. Double-check your encoding settings when you're exporting / transcoding.
 
hoju said:
I've looked at both files, and there's definitely something going on with them. It doesn't seem like a "dropped frames" issue, but rather, a setting / encoding issue.

The cadence to both files is off, as opposed to some occasional dropped frames that you'd see with a misformatted card or data rate issues.

If you step through the 24fps file, you'll see that it's actually at 12fps but conformed to 24fps. So basically, every frame is repeated, thus making it 12fps x 2 = 24fps.

With the 60fps file, it's also off, but again, it seems like an encoding or settings issue. Stepping through it, the file doesn't advance every frame.

My suggestions:

1. Look at the original camera files.
2. Make sure you're shooting progressive and not interlaced (assuming that's your intention).
3. Double-check your encoding settings when you're exporting / transcoding.
Click to expand...

Well, the weird thing is the 1080p 60fps file is right out of the camera and straight into Vimeo. I didn't even go through Premiere.
The translation to 24fps was done with Premiere and I am confident of the export settings.
I can't figure this out!
 
Are you setting the shutter below the frame rate. I know it's possible in 24 fps but not sure of the 1080/60 setting (I always shoot GH3 slomo in-camera & don't conform in post).
 
Bern Caughey said:
Are you setting the shutter below the frame rate. I know it's possible in 24 fps but not sure of the 1080/60 setting (I always shoot GH3 slomo in-camera & don't conform in post).
Click to expand...


That must be it! I usually shoot slo-no in camera too and otherwise shoot 24fps at 1/50 shutter.
I bet dollars to donuts I forgot to bump up the shutter speed after changing to 60fps. Wow. Thanks for that!

So next time need to set it to at least 1/60?

Yikes. What a stupid mistake.
 
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