Screenscrapping with Syphon possible?

[usefuldesign.au]

I want to record desktop screen like you can with Quicktime using Syphon? I have a movie playing to the desktop streaming into a web browser from the internet at full screen size and goes for 60 minutes want to record.

[vade]

Use our Quartz Composer screen capture to a syphon server? Use Syphoner?

There are plenty of options.

[usefuldesign.au]

Thanks Vade

Syphoner is a new one for me 🙂 DLing now. How does one do screen capture in QC from a different application like Chrome? I know how to use Syphon in QC to pipe an image or a QC Viewer window but not external app windows.

[bangnoise]

If you just want to record a movie of the desktop, why use Syphon at all? QuickTime Player does screen recording.

[HDL]

Hello, I’ve also been having trouble finding a good solution for this.

QuickTime does not record lossless RGB video.
ScreenFlow has the same problem, albeit to a far lesser extent. It’s not free and its export options all have flaws.
There’s CamTwist + Syphon Recorder, but CT is a performance hog at times.
SyphonInject + Syphon Recorder may also cause performance issues based on the source.
v002 Screen Capture doesn’t seem to work on Yosemite.
Desktop to Syphon isn’t behaving correctly when I set my origins and capture resolution.
Syphoner is not free and it’s broken on Yosemite.
ffmpeg has a frame rate bug with AV Foundation capture.

High performance lossless RGB recording on OS X seems to be really hard to come by.

[vade]

v002 Screen Capture 2.0 (on our https://github.com/v002/v002-Media-Tools/ repository) works with Yosemite. I just tested it and made a RGB 4444 Pro Res recording via Quartz Composer -> Syphon Recorder at 60fps.

We’ve been lax with updating official releases of plugins because of the number of bugs and unfixed issues in QC, so we aren’t putting a lot of dev and personal time in to it. Sorry about the confusion.

• This reply was modified 6 years, 3 months ago by vade.
• This reply was modified 6 years, 3 months ago by vade.

[HDL]

I downloaded 2.0.2 from the main site (there are no builds on the GitHub). What I see is different from that screen shot.

https://www.dropbox.com/s/k1427tt2i1bkicj/v002.zip?dl=0

I don’t have that Syphon Server block either.

[vade]

like i said its only on github. you have to build. we aren’t packaging.

Install the Syphon QC Plugin.

[HDL]

I tried building it in Xcode 6.1.1, but the ARC conversion and build fails.

https://www.dropbox.com/s/roqr13032xvncja/v002%20Build%20Failed.zip?dl=0

[bangnoise]

I’ve updated the project, pull and try again.

[HDL]

Works perfectly now, thanks.

[HDL]

After a bit of testing I did find an issue. While screen capture itself works great, the colors are inaccurate:

https://www.dropbox.com/s/z2yeqf8wcewmods/v002%20capture%20colors.zip?dl=0

I’m not sure if the v002 plugin is causing it or Quartz Composer. The capture is very noticeably brighter than the source.

Edit: Upon closer inspection it also seems there is some very slight blurring as well.

• This reply was modified 6 years, 3 months ago by HDL.

[bangnoise]

I’ve opened an issue for this. We’d welcome a pull-request if you fix it.

[vade]

Pull from the repo, I’ve updated the code and verified in QC at least the color is fixed (via digital color meter).

Thanks for the report and good eyes!

[HDL]

That was fast, thanks! OS X has so few accurate recording options so this really helps.

Could you also look into this when you have time? http://v002.info/forums/topic/syphon-recorder-fps-issue/

Between this and ffmpeg’s screen capture, smooth FPS seems to be the last real problem plaguing lossless recording on OS X.

[bangnoise]

Please don’t post duplicate requests for attention.

If you just want to do screen capture then there are various commercial products available, and they provide customer support at the level you seem to require.

[Author]

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