Codec for realtime recording / best solution?

[Photon]

I'm coming back to Amiga and creativity in general. I uploaded a demo capture [ Show youtube player ] fine with Output set to Full frames (uncompressed), but for longer captures or interactive stuff like games this will not work (for anyone).

It seems I've lost my TechSmith codec of Longplay fame (or at least WinUAE x64 doesn't list it anymore).

Could someone put a fave x64 compatible codec in the Zone? I'm looking to record at least the hires windowed default with minimal loss. Then I can adapt to 16:9 formats etc fine.

I have RTX 3070 so if ppl have had good experiences with recording and playing in fullscreen with GeForce Experience I can listen to advice about this too - how do I record to 50 FPS? My monitor can sync 100 FPS but this doesn't help as Amiga PAL is not (exactly) 50 FPS. Things like that, if you have solved them

[Rotareneg]

Ut Video is a good free lossless codec: https://github.com/umezawatakeshi/utvideo/releases

[lordofchaos]

I would recommend using the GeForce experience, it's low impact on the CPU, generally very good capture quality along with chucking out modest file sizes. It will capture at 60fps but super easy to convert to 50fps with the many video editors/convertors out there.

[pandy71]

Side to UTVideo you may give a chance to:
https://www.videohelp.com/software/G...lley-HQX-Codec
https://www.videohelp.com/software/Avid-DNxHD

all designed for fast minimal loss/no loss intermediate video processing

and perhaps (disable CABAC, GOP=1, fast decode, ultrafast - i usually set fixed Qp so no time lost for bitrate decision) with modern CPU is reasonably fast
https://www.videohelp.com/software/x264-VFW

For all above use 4:4:4 (to not loose chroma detail), using YUV (YCbCr) provide higher compression due decorrelation chroma from luma, personally i would prefer lossless RGB<>YCoCg-R but seem it is not supported by anyone (except H.264 that's why you can try x264vfw).

NVidia capture use HW video compression so it may have some pros and cons (but it is fast, with high bitrate decent quality, and very low CPU utilization) - you may wish to check ( to understand NVEnc capabilities)
http://developer.download.nvidia.com...NC_AppNote.pdf
https://docs.nvidia.com/video-techno...tion_Guide.pdf
https://docs.nvidia.com/video-techno..._ProgGuide.pdf
http://developer.download.nvidia.com...l-flow-sdk.pdf

[rutra80]

ZMBV is very interesting for emu captures - lossless and very space efficient.
As for something compatible with YouTube, everything will be reencoded anyway, so make sure that you capture or upscale to at least FullHD or even 1440p - lower resolutions don't get enough bitrate on YT to preserve enough detail at full framerate.

I'd say capture losslessly at native resolution and framerate, then upscale to H.264@1440p50 and plenty of bitrate with ffmpeg or HandBrake.
Here's what YT prefers:
https://support.google.com/youtube/answer/1722171

Personally I'd capture with CRT-Guest-SM-Hires-SmartRes shader at cranked up sharpness, because Amiga without scanlines is not Amiga. The problem is that scanline shaders work badly with laced modes.

[Foebane]

Originally Posted by rutra80

Amiga without scanlines is not Amiga.

(wow, the arrogance)

[Photon]

Originally Posted by rutra80

Amiga without scanlines is not Amiga.

Originally Posted by Foebane

(wow, the arrogance)

I don't think it's arrogant really. And I think it would be great with scanlines in emulator use and capture.

Codecs are not made for it however, and this being the case I would rather capture pure pixels.

Not necessarily for others to add scanlines to with some filter (which would be fine), or because streaming services codecs disappoint, but to preserve the capture the best. Like PNG instead of a JPEG, I would prefer a screenshot without scanlines because it has the correct pixels in place.

As with a screenshot, then everyone can do what they want: measure, pick RGB values, reference it without loss, etc.

[Foebane]

Originally Posted by Photon

I don't think it's arrogant really. And I think it would be great with scanlines in emulator use and capture.

Codecs are not made for it however, and this being the case I would rather capture pure pixels.

Not necessarily for others to add scanlines to with some filter (which would be fine), or because streaming services codecs disappoint, but to preserve the capture the best. Like PNG instead of a JPEG, I would prefer a screenshot without scanlines because it has the correct pixels in place.

As with a screenshot, then everyone can do what they want: measure, pick RGB values, reference it without loss, etc.

It should be down to personal preference, and yes, the artefacts that scanlines would cause during video compression. I just took offence to it being worded as a fact, rather than as an opinion, and I couldn't help thinking of those poor real Amiga owners who only have access to LCD TVs and no way to reproduce scanlines as seen on CRT TVs.

[malko]

Originally Posted by photon

[...] i would rather capture pure pixels. [...] but to preserve the capture the best. Like png instead of a jpeg, i would prefer a screenshot without scanlines because it has the correct pixels in place. [...]

+1

[rutra80]

Originally Posted by Foebane

I just took offence to it being worded as a fact, rather than as an opinion

Originally Posted by rutra80

Personally I'd

[Foebane]

Originally Posted by rutra80

Sorry, didn't see that bit.

[pandy71]

Originally Posted by Foebane

I couldn't help thinking of those poor real Amiga owners who only have access to LCD TVs and no way to reproduce scanlines as seen on CRT TVs.

Well... it is not entirely true - you can simulate scanlines and you can simulate interlace - depends on LCD with small or bigger penalties but still doable - you need only dedicated SW/HW to do so.