GH4 Trimming 4K video
- Thread starter wcimages
- Start date
Mark Williams
Veteran
MPEGStreamclip works for me. I have trimmed hundreds of 4k clips from my GH4. Maybe you are not using it correctly. Open clip
and under "edit" select in and select out. Then select trim. Finally, select "save as".
and under "edit" select in and select out. Then select trim. Finally, select "save as".
What would you suggest? I'm taking my footage through GoPro to convert to Cineform and then out to 4K. I then bring this into an AE CC 2014 1080 32bit CIE RGB space timeline then to SpeedGrade, if desired, and finally to Premiere Pro CC 2014. Since GoPro will not allow me to trim non-GoPro footage, I'm just using MPEGStreamclip to rough trim footage to speed up the GoPro rendering times.
Mark Williams
Veteran
There are probably a few here that are in a similar situation. My NLE will not edit 4k nor do I have the funds to upgrade my computer and editing software. I do shoot 4k for stock video and MPEGstreamclip allows me to trim clips and prepare them without re-encoding for uploading to my stock video site. Most of the time the image looks so good out of the camera no post work is required. I also down convert 4K clips so I can use them in 1080p video projects. The video looks really good after the down convert.
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Bruce Foreman
Veteran
Sounds kind of "convoluted" to me. My NLE would not handle 4K (just froze up) so I upgraded. Caught a special offer for the retail box version of Corel Pinnacle Studio 17.5 Ultimate (was using 16.1) and it almost works like magic. Import GH4 C4K clips, drop on timeline - trim as desired - with frame accurate editing if needed, add transitions (I only use simple fades and cross fades), and when finished editing I often render from 4K to 1080p in delivery format needed, I have no 4K display or devices.
All in one program. Pinnacle Studio has not been the "darling" of choice for many but when Corel acquired it (and Avid consumer products) version 16 was what would have been Avid Studio 2 and it worked well for me. 17.5 added 4K and a "live screen capture" utility I'm finding very useful.
You want a quick 4K editor that won't re-encode the rough cuts, otherwise you lose quality right off the bat. I've been using Quicktime pro (possible to get free) because I read it doesn't re-encode (.mov files). It was pretty much confirmed since saves are under a second. Encoding takes longer. Open the clip, move the cursor, press "I" and "O" (in and out) then save-as.
R Hudson
Well-known member
Can't Premiere Pro handle the native files? Or perhaps a combo of PP and AE?
David W. Jones
Veteran
Start in Premiere Pro and edit your footage as needed. Then use SpeedGrade or AE.
To all those concerned about my workflow. I am converting to Cineform so when I take it into an AE 1080 32bbit RGB space it will convert an 8bit file to a 10 bit file giving me smoother gradients and more latitude for editing. In addition, I can pan and zoom in or out to recompose the frame as desired. When all the AE effects are done the file is exported to PP CC for final processing . A more detailed reasoning is described at www.eoshd.com/content/12140/discovery-4k-8bit-420-panasonic-gh4-converts-1080p-10bit-444.
David W. Jones
Veteran
Maybe I'm a little stuck in my ways, but your workflow seems bassakwords to me. Edit your project in Premiere Pro, and it imports directly into AE where you can tweak to your hearts content. You seem to be putting the cart before the horse. But hey, if it works for you great.
R Hudson
Well-known member
I'm a little confused. My understanding is that the file needs to be acquired natively as a 10 bit file in order to have smoother gradients/more latitude in editing. Simply converting from 8 bit to 10 bit isn't going to "add" any more latitude, is it?
Edit: I read the article you linked and it appears to possibly work. I am, however, a tad skeptical on the results. It seems overly-complicated.
thorn
Active member
I haven't tried an 8 -> 10 bit resample in this manner, but when you consider a still frame it has sound theory. Try it yourself:
1. Go into photoshop, make a new document.
2. Convert to greyscale.
3. Convert to bitmap.
4. Select a brush or two, and paint. The edges will be a bit jagged.
Now, convert back to greyscale - ratio of 2 or 4. All those jagged edges will now not just be black and white; you've now increased the color space and resized, and the colors have also re-interpolated giving you a smoother edge. The theory is the same with full gradients. Shrink the image and increase the color depth, and it's going to smooth out the frame.
1. Go into photoshop, make a new document.
2. Convert to greyscale.
3. Convert to bitmap.
4. Select a brush or two, and paint. The edges will be a bit jagged.
Now, convert back to greyscale - ratio of 2 or 4. All those jagged edges will now not just be black and white; you've now increased the color space and resized, and the colors have also re-interpolated giving you a smoother edge. The theory is the same with full gradients. Shrink the image and increase the color depth, and it's going to smooth out the frame.