Question regarding resolutions

jak.willis wrote on 10/17/2024, 7:53 AM

Hello,

This is not related to Magix products, however I have a question to ask some experts here.

I understand that Freeview broadcasts for SD channels is 544x576, but why is it that if you watch the same programme via a streaming service, the resolution is 1024x576?

So really my question is whether there is much difference in quality between 544x576 & 1024x576? The overall quality does seem to look a bit better compared to how it looks on Freeview.

Comments

AAProds wrote on 10/17/2024, 6:07 PM

@jak.willis

Jak, the Freeview videos would have the 16:9 flag set in the file so that the pixels display at the 16:9 "shape". That means the 544 horizontal pixels are stretched to cover the 1024 area; they are not squares, they're effectively=y rectangles.

As for the better quality, I surmise that that is because, for the square-pixel stream video, you're actually getting 1024 pixels across instead of 544 stretched. That would allow more detail.

All my forum comments are based on or refer to my System 1.

My struggle is over! I built my (now) system 2 in 2011 when DV was king and MPEG 2 was just coming onto the scene and I needed a more powerful system to cope. Since then we've advanced to MP4 and to bigger and bigger resolutions. I was really suffering, not so much in editing (with proxies) but in encoding, which just took ages. A video, with Neat Video noise reduction applied, would encode at 12% of film speed. My new system 1 does the same job at 160% of film speed. Marvellous. I'm keeping my old system as a capture station for analogue video tapes and DV.

System 1

Windows 11 v23H2 severely modified by Openshell and ExplorerPatcher

Power supply: 850W Cooler Master (should have got modular)

CPU: Intel i7 13700K running at 3400mhz, cooled by a Kraken 2x140mm All In One liquid cooler.

RAM: 64gb (2x32gb sticks) G.Skill "Ripjaws" DDR4 3200Mhz

GPU 1: iGPU UHD 770

GPU 2: NVidia RTX 3060Ti Windforce 8gb

C drive: NVME 500gb

Various other SSD and HDDs.

Monitor: 27"/68cm Samsung, 2560 x 1440, 43 pixels/cm.

MEP 2021 version 20.0.1.80

Movie Studio 2023 version 22.0.3.172

Magix Video Easy version 7.0.1.145

System 2

(Still in use for TV and videotape capture)

Windows 10 v22H2

CPU: i5-750 at 2670mhz with 12gb RAM

Onboard IEEE1394 (Firewire) port

GPU: ATI Radeon HD 4770 (512mb) which is ignored by MEP

Hard drives: C Drive 256gb SSD, various other HDDs.

Monitor: Dell 22"/56cm, 1680x1050, 35 pixels/cm

MEP 2021 version 20.0.1.80

Movie Studio 2023 version 22.0.3.172

VPX 12