iOS video_player sample doesn't show video in the emulator

[nkleenest]

Steps to Reproduce

I'm trying to use flutter with a FlutterTexture in the iOS emulator and I'm repeatedly hitting:

[VERBOSE-1:ios_external_texture_gl.mm(37)] Failed to create GLES texture cache: -6661

I downloaded this sample:

https://github.com/flutter/plugins/tree/master/packages/video_player

and hit the play button. This also repeatedly shows this error and doesn't render video.

Logs

Launching lib/main.dart on iPhone X in debug mode...
Running Xcode build...
Syncing files to device iPhone X...
[VERBOSE-1:ios_external_texture_gl.mm(37)] Failed to create GLES texture cache: -6661
[VERBOSE-1:ios_external_texture_gl.mm(37)] Failed to create GLES texture cache: -6661
[VERBOSE-1:ios_external_texture_gl.mm(37)] Failed to create GLES texture cache: -6661
...

Flutter Doctor

[✓] Flutter (on Mac OS X 10.13.2 17C205, locale en-US, channel dev)
    • Flutter version 0.0.25-pre.5 at [redacted]
    • Framework revision 4ae1b5f415 (5 days ago), 2018-02-07 15:18:04 -0800
    • Engine revision 9bc2efdf47
    • Tools Dart version 2.0.0-dev.19.0
    • Engine Dart version 2.0.0-edge.ea91bc9888184d5a2fc309c36656fdd325ef503c

[✓] Android toolchain - develop for Android devices (Android SDK 26.0.2)
    • Android SDK at [redacted]
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-26, build-tools 26.0.2
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-915-b08)

[✓] iOS toolchain - develop for iOS devices (Xcode 9.2)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 9.2, Build version 9C40b
    • ios-deploy 1.9.2
    • CocoaPods version 1.4.0

[✓] Android Studio (version 3.0)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-915-b08)

[✓] IntelliJ IDEA Community Edition (version 2017.3.4)
    • Flutter plugin version 21.2.3
    • Dart plugin version 173.4548.30

[✓] Connected devices
    • iPhone X • 0094171F-87B1-4C62-8DC5-8AE28FC5800A • ios • iOS 11.2 (simulator)

• No issues found!

[chinmaygarde]

The iOS emulator uses the software renderer which does not support external texture sources. You will have to use a device to test video support.

@mravn-google: If the simulators support the necessary Core Video frameworks, we can use emulated OpenGL on the simulator to enable users to test video and external texture sources on the simulator.

[mravn-google]

The culprit on Simulator appears to be our use of the texture cache. We have not had time to look into alternatives yet, but https://stackoverflow.com/questions/12813442/cvopenglestexturecache-vs-gltexsubimage2d-on-ios may provide a starting point.

[chinmaygarde]

So it is not as straightforward as just flipping the renderer backend on the simulators back to OpenGL then. Maybe we should log a clearer message that states that external texture sources are not available and suggests the user test on a device then (till we figure out a workaround).

[bhlvoong]

At the very least, the README should warn users that iOS simulator is not supported.

[fuzzybinary]

Also for us poor package developers, please put a comment in TextureRegistry to the same effect ;)

[threeseed]

This cost me quite a few hours. Please, please update the documentation.

[chinmaygarde]

I added a note to the README.

[zoechi]

#13331 is the equivalent issue for Android. I guess it makes sense to keep them both open because they are probably caused by different underlying issues.

[esbenr]

Hi, this is becomming a deal breaker to our dev cycle/pace.
Are there anyone looking into this?
I'm not familiar enough with flutter to do it my self, yet.

So, os there an ETA?

Thanks.