Hard to tell from the log exactly what's going wrong but it looks like either a shader that isn't compiling or an unsupported video format:

 testing: video/ogg; codecs="theora, vorbis"
  video/ogg; codecs="theora, vorbis" unsupported
  *** Error loading shader '[object WebGLShader]':INVALID_FRAMEBUFFER_OPERATION
  Error in compiling shader
  
  testing: video/mp4; codecs="avc1.42E01E, mp4a.40.2"
  
  testing: video/webm; codecs="vp8, vorbis"
  
  testing: video/webm; codecs="vp9"
  
  testing: video/ogg; codecs="theora, vorbis"
  video/ogg; codecs="theora, vorbis" unsupported

Uh oh. I'll revert while I debug this.

Reverting in https://codereview.chromium.org/2818493002/ .

The revert got these bots green again.

In https://codereview.chromium.org/2791813003/#ps250001 I disabled GPU-GPU copies to floating-point textures on all Android devices. It wasn't easy to narrow this workaround to only occur on NVIDIA GPUs.

Blocking on  Issue 701060 . Once that urgent bug is closed we should investigate this.

This is caused by assuming support for GL_EXT_color_buffer_float. We hit the same regression with SwiftShader the other day, and "fixed" it by implementing the extension.

Good observation Nicolas. Studying the code for CopyTextureCHROMIUM, and in particular GLES2DecoderImpl::getCopyTextureCHROMIUMMethod and Texture::ColorRenderable, it looks like it may not be properly taking into account whether EXT_color_buffer_float is enabled. Since the context in which this is called is a WebGL 1.0 context (in which extensions are conditionally enabled), and it would really need to be "WEBGL_color_buffer_float" which would be enabled, I'm not sure what happens in this case.

I note that this works on Qualcomm GPUs, on which EXT_color_buffer_float is supported. NVIDIA GPUs for Android also support this extension.

I think something more complicated is going on here. Qiankun, can you help diagnose this more deeply? Do you have any hardware on which this reproduces? If not I can try to help.

The assigned owner "qiankun.miao@intel.com" is not able to receive e-mails, please re-triage.

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This issue has been Available for over a year. If it's no longer important or seems unlikely to be fixed, please consider closing it out. If it is important, please re-triage the issue.

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