Record 60 frames per second WebGL on headless Chrome

[duked...@gmail.com]

Headless Chrome does not use hardware GPU - this is sad :-(

Instead headless Chrome uses the SwiftRender software renderer.

I still need to be able to render 60 frames per second - even if it is slow to do so - and save the resulting animation to a file.

Is this possible?

[Eric Seckler]

You can use virtual time together with a manual rendering mode to render animations at a custom, deterministic frame rate. See this thread and bit.ly/headless-rendering for some background reading. FYI, this is still an experimental feature, we intend to refactor the DevTools APIs related to virtual time and BeginFrames in the near future.

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[duked...@gmail.com]

Is there a tangible example of how to use virtual time together with a manual rendering mode to render animations at a custom, deterministic frame rate?

I've read the links you posted but they didn't seem to boil down to tangible actions.

I want to be able to capture 3d animations on the webgl canvas and also screencasts.

thanks

 

[Eric Seckler]

There's a test here, which illustrates this:

https://cs.chromium.org/chromium/src/headless/public/util/compositor_controller_browsertest.cc?sq=package:chromium&g=0&l=86

I don't have an example for using it from node/puppeteer right now.

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[duked...@gmail.com]

Apologies for being a noob, but is this how I get the required experimental headless Chrome?

curl -O https://dl.google.com/linux/direct/google-chrome-unstable_current_amd64.deb

[Eric Seckler]

That should work :)

On Thu, Jul 19, 2018, 22:30 <duked...@gmail.com> wrote:

Apologies for being a noob, but is this how I get the required experimental headless Chrome?

curl -O https://dl.google.com/linux/direct/google-chrome-unstable_current_amd64.deb

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[duked...@gmail.com]

Thanks Eric - I'm going to do my best to figure out how to do this in JavaScript but if you were willing to provide a JavaScript example of how to drive virtualtime for deterministic rendering it would be a huge help.

thanks

[Yuanjun Zhong]

Hi, ducked... I encounter the same problem as you. Have you solved it?