UHD Footage is not crisp

sascha9er wrote on 3/10/2019, 11:32 AM

Hello Community,

I have an issue with my Magix Video Pro X 10 and don't know what to do anymore.

All my footage is shot in 2.7K 60fps on my GoPro and my DJI Mavic. The files are imported as mp4 in this resolution. Now if I render the film in 2.7K 25fps or 4K 25fps the film looks just bad. Moving parts just judge blocks of judge pixels. Almost like I exported it in 720x480. A steady shot takes a second or two and then its as crisp as I would expect it to be in 2.7K. This is the case in AVI and MPEG4 as well as on my desktop, my TV and my cell phone.

If I render the film in 1080p it looks way better and just as I would expect it to be from a 1080p film.

And I don't get why. Know here are my key settings:

Hardware:

I7-8700K, Nvidia RTX2080, 16GB RAM on a 64bit Win10 system.

Export settings right know:

MPEG-4-Export (MP4)
Video: H.264; 3840x2160p; 25 frames/s; VBR 6000 kbit/s; hardware encoding
Audio: AAC; Stereo; 48000 Hz; 128 kbit/s

I use to calculate video effects on GPU.

Preferred codec for MPEG4 import and export is set to default.

What can I do here?

I appreciate your help.

Sascha

 

Comments

RogerGunkel wrote on 3/10/2019, 12:21 PM

Hi Sascha,

My first thought on looking at your post, was that 6000kbit/s is very low for the footage you are converting from. The least VBR I ever use is average 10,000, max 14,000 for a long project, but for much shorter projects up to 30 minutes, usually 20,000 and 24,000. With a bit rate as low as 6000 kbs I would expect a noticeable drop in quality.

Roger

johnebaker wrote on 3/10/2019, 3:11 PM

@RogerGunkel

Hi

I agree with Roger's comment about the video bitrate being too low,

For UHD (4K) export I would be looking at bitrate settings of Ave = 45000, maximum 60000 for 25 fps for playing on a computer, or if for Youtube then their recommended bitrate settings are min 35000, max 45000 at 25 fps.

There is also another issue which will reduce the quality of the video and that is up-scaling.

The 2.7k video has a resolution of 2704 x 1520 pixels and you are increasing this to 3840 x 2160 px and this is going to exhibit some blockiness, this will be made worse if you have cropped, or zoomed in, the 2.7K video in VPX.

HTH

john EB

VPX 16, Movie Studio 2025, and earlier versions 2015 and 2016, Music Maker Premium 2024.

PC - running Windows 11 23H2 Professional on Intel i7-8700K 3.2 GHz, 16GB RAM, RTX 2060 6GB 192-bit GDDR6, 1 x 1Tb Sabrent NVME SSD (OS and programs), 2 x 4TB (Data) internal HDD + 1TB internal SSD (Work disc), + 6 ext backup HDDs.

Laptop - Lenovo Legion 5i Phantom - running Windows 11 24H2 on Intel Core i7-10750H, 16GB DDR4-SDRAM, 512GB SSD, 43.9 cm screen Full HD 1920 x 1080, Intel UHD 630 iGPU and NVIDIA GeForce RTX 2060 (6GB GDDR6)

Sony FDR-AX53e Video camera, DJI Osmo Action 3 and Sony HDR-AS30V Sports cams.

sascha9er wrote on 3/10/2019, 6:10 PM

Thank you Rodger and John,

You are right. Of course 6000 kbit/s was way to low. I changed it to 45 Mbit/s and now the quality is what I was looking for.

Thank you.