Hello,

First, thanks for the answer

I did try some months ago the Gopro Studio, I don't like it and prefer Movie Studio so I already removed it. Do you expect it will help in any way?

I don't really catch the second sentence. If you can explain I would appreciate.

I already removed Protune in the settings. Why there is no advantage?

The contermeasure I found is to "re-encode" all the files to another AVC/AAC MP4 with a high bitrate 8Mbs. I don't really understand why I should do that when I do not need it when the files are coming from another device. Then they are perfectly fluid in the view window. I suspect a codec issue and probably a parameter setting in Movie Studio would solve this. No?

BR

> "I did try some months ago the Gopro Studio, I don't like it and prefer Movie Studio so I already removed it. Do you expect it will help in any way?"

The whole purpose of using GoPro Studio is to convert the choppy GoPro files into smooth running ConeForm files. You definitely want to re-install it and use it to convert your files to CineForm.

> "The contermeasure I found is to "re-encode" all the files to another AVC/AAC MP4 with a high bitrate 8Mbs."

That's the whole point of GoPro Studio. You should be converting the files to CineForm not MP4.

> "I don't really understand why I should do that when I do not need it when the files are coming from another device. "

Because Movie Studio hasn't been updated to handle GoPro footage as efficiently as it could. The MP4 specification is extremely broad and no software can possibly handle it all of the possible permutations and camera manufacturers love to make their footage different from all the other cameras which is a nightmare for NLE's to handle. You really have to stay on top of the popular camera formats as a software developer.

> "I suspect a codec issue and probably a parameter setting in Movie Studio would solve this. No?"

Well the one thing you can check is to make sure that your project properties match your source media properties and that you don't keep the preview window settings too high. Other than that, it's up to the software to interpret the footage efficiently.

~jr

>"I already removed Protune in the settings. Why there is no advantage?"

Movie Studio maintains an 8-bit pipeline from door to door. No 32-bit float project support.

>"The contermeasure I found is to "re-encode" all the files to another AVC/AAC MP4 with a high bitrate 8Mbs."

AVC is an acquisition and delivery mediium; as a long GOP interframe compressor, it is not an efficient intermediate solution. 8 Mbps is NOT "high bitrate."

>"I suspect a codec issue and probably a parameter setting in Movie Studio would solve this. No?"

You really have four choices:
1. Search the forums and knowledgebase. All the answers are there, although in different places.
2. Accept the general advice given, while your learning curve grows over time.
3. Provide complete system specs, media properties, project properties, and preview properties.
Specific information will get you specific answers; however, neither JR nor I are clairvoyant, afaik.
4. Reinvent the wheel.

Thanks, JR, for posting the answers with more clarity than I could have.
;?)