Blackmagic Forum

My practice video plays unsmooth/laggy with high-res and low-res export. Original footage is h264 4k from DJI X5S. Would someone assist which all may be wrong?

I'm newbie in video editing and Davinci Resolve too. I've done some very basic projects with HD material but have serious gaps in knowledge for sure.

Computer specs:
- i7 - 3770k 3.5GHz
- 32Gb 1800 MHz RAM (Highest clock speed for this motherboard, max. amount)
- Win 7 Professional 64bit
- Resolve 15 Beta
- Nvidia GeForce GT 710

Without deeper knowledge, I would blame graphics card but I saw similar symptoms with one professional video editor work as well (assuming he has proper tools). He blamed my computer playback power but I strongly disagree. It was clear playback in 4k from Youtube played on my work computer which is high-end 3D design PC from late 2017.

Resolve logs, original footage and exported footage is downloadable here: I was ´"not able to post url's"... Anyway, all material is gathered but I don't know how to share it.

Thanks!

I'm not sure if you are referring to playback inside of Resole or after export.
With only 192 CUDA chores and 2 GB VRAM your GPU is not up to working in 4K, sorry. Resolve is a high-end software and quit demanding on hardware.

Playback after export also depends to which degree your player relies on the GPU or CPU. Which format are you trying to export (codec, data rate, resolution)?

Just put one space in your URL to post your logs/examples.

Uli Plank wrote:I'm not sure if you are referring to playback inside of Resole or after export.
With only 192 CUDA chores and 2 GB VRAM your GPU is not up to working in 4K, sorry. Resolve is a high-end software and quit demanding on hardware.

Playback after export also depends to which degree your player relies on the GPU or CPU. Which format are you trying to export (codec, data rate, resolution)?

Just put one space in your URL to post your logs/examples.

Hi,
This was solved mostly yesterday before this question became public. It had several hours of delay for some reason.
This was about an Exported video, the result after Export.
Issue #1 was wrong fps setting. I was able to change from 24 to 25 only by creating a new blank project.

Issue #2 was 25fps video which was too rough. I converted it to 50fps with optical flow trick found on Youtube. It works pretty nice with all footage I got.

Issue #3 is the graphics card. I assumed it gives very laggy player results but I couldn't expect it destroys rendering. I assumed it just takes only longer to render. I changed temporarily to borrowed 1060 3Gb so I don't know if Exported result with Low-End GPU would have been as good as it is now with 1060.

I ordered 1070Ti 8Gb so things should get a little smoother in general soon.

You probably have a hardware bottleneck (graphics card, hard drive, etc). Transcode the file to a less-demanding codec.

Install ffmpeg
https://ffmpeg.org/download.html

Then convert your video with (replace <inputfilename> with the name of your file):
ffmpeg -i <inputfilename> -c:v libx264 -crf 23 -preset fast -pix_fmt yuv420p -c:a aac <inputfilename>.mp4

If it still stutters, add " -s 1280x720" after the word "fast" and try it again. If one of those files plays smoothly, you know your computer is a bit slow for resolve.

Lance Braud wrote:You probably have a hardware bottleneck (graphics card, hard drive, etc). Transcode the file to a less-demanding codec.

Install ffmpeg
https://ffmpeg.org/download.html

Then convert your video with (replace <inputfilename> with the name of your file):
ffmpeg -i <inputfilename> -c:v libx264 -crf 23 -preset fast -pix_fmt yuv420p -c:a aac <inputfilename>.mp4

If it still stutters, add " -s 1280x720" after the word "fast" and try it again. If one of those files plays smoothly, you know your computer is a bit slow for resolve.

Thank you, Lance!
New GPU arrives tomorrow and then I could make a new attempt with better hardware. The video was h264 from DJI X5S. h265 didn't play at all with this hardware.