WinUAE Video Output Resolution/Capture Before Filtering Query

Al82 · 10 October 2017, 20:27

Hi folks,

I think is more my lack of understanding than an actual problem, but I wondered if anyone can advise on why the output of video clips using the built in WinUAE recorder appears to switch to 752 x 574 whenever I start recording after the machine has been started and Capture Before Filtering is enabled?

However, if I start recording from the point the program is loaded (i.e. before the Amiga machine has been started), the output seems to follow the resolution I have configured under the 'Display' options (e.g. 800 x 600), but any subsequent clip switches back to 752 x 574 after that.

What I'm wondering is, why is it choosing 752 x 574?

ransom1122 · 10 October 2017, 20:44

I have noticed this as well. The first avi is always different resolution when recording from the start

Al82 · 10 October 2017, 23:11

Looking at the logs, there's a line that says:

D3D9Ex: 752*574 texture allocated, bits per pixel 32

If I change the resolution option in the display menu then the log entry changes appropriately:

Lowres
D3D9Ex: 376*574 texture allocated, bits per pixel 32

Hires
D3D9Ex: 752*574 texture allocated, bits per pixel 32

SuperHires
D3D9Ex: 1504*574 texture allocated, bits per pixel 32

The resolution setting appears to dictate the resolution of the video output.

Is the resolution somehow related to overscan?

Toni Wilen · 11 October 2017, 19:38

Before capturing = capture from internal buffer which is always as big as absolute max visible Amiga resolution, including all overscan.

It can be changed by manual config file editing:

From changelog:

- Added config file only optional AVIOutput position and offset parameters: recording_width and recording_height, (resolution of video) and recording_x and recording_y, offset from top/left of Amiga display. If offsets are not set or negative, Amiga display is automatically centered. Only available in "capture before filtering" mode.

Initial wrong resolution is a bug. (fixed now, delay avioutput init until first frame or sound buffer is requested)

Al82 · 11 October 2017, 20:10

Thanks for the info Toni - makes sense now

10 October 2017, 20:27	#1
Al82 Registered User Join Date: Sep 2017 Location: UK Posts: 95	WinUAE Video Output Resolution/Capture Before Filtering Query Hi folks, I think is more my lack of understanding than an actual problem, but I wondered if anyone can advise on why the output of video clips using the built in WinUAE recorder appears to switch to 752 x 574 whenever I start recording after the machine has been started and Capture Before Filtering is enabled? However, if I start recording from the point the program is loaded (i.e. before the Amiga machine has been started), the output seems to follow the resolution I have configured under the 'Display' options (e.g. 800 x 600), but any subsequent clip switches back to 752 x 574 after that. What I'm wondering is, why is it choosing 752 x 574? Last edited by Al82; 10 October 2017 at 20:33.

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10 October 2017, 20:44	#2
ransom1122 Registered User Join Date: Aug 2011 Location: Omnicorp Age: 45 Posts: 5,813	I have noticed this as well. The first avi is always different resolution when recording from the start

10 October 2017, 23:11	#3
Al82 Registered User Join Date: Sep 2017 Location: UK Posts: 95	Looking at the logs, there's a line that says: D3D9Ex: 752574 texture allocated, bits per pixel 32 If I change the resolution option in the display menu then the log entry changes appropriately: Lowres* D3D9Ex: 376574 texture allocated, bits per pixel 32 Hires* D3D9Ex: 752574 texture allocated, bits per pixel 32 SuperHires* D3D9Ex: 1504*574 texture allocated, bits per pixel 32 The resolution setting appears to dictate the resolution of the video output. Is the resolution somehow related to overscan?

11 October 2017, 19:38	#4
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,507	Before capturing = capture from internal buffer which is always as big as absolute max visible Amiga resolution, including all overscan. It can be changed by manual config file editing: From changelog: - Added config file only optional AVIOutput position and offset parameters: recording_width and recording_height, (resolution of video) and recording_x and recording_y, offset from top/left of Amiga display. If offsets are not set or negative, Amiga display is automatically centered. Only available in "capture before filtering" mode. Initial wrong resolution is a bug. (fixed now, delay avioutput init until first frame or sound buffer is requested)

11 October 2017, 20:10	#5
Al82 Registered User Join Date: Sep 2017 Location: UK Posts: 95	Thanks for the info Toni - makes sense now

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