[Impeller/Android/Vulkan] issues rendering video with Impeller/Vulkan #182825
Description
Steps to reproduce
I'm trying to show a (local) video using Livekit, which internally uses Flutter WebRTC.
Expected results
See lokal video, same as when using Impeller/OpenGLES or Skia
Actual results
With standard settings (i.e. Impeller with Vulkan), depending on the phone, I see the local video, but with transparency, i.e. widgets behind the video shine through (see screenshots below)
Broken phone: Samsung Galaxy A14 (SM-A145R/DSN)
Working phone: Fairphone 5 5G
Code sample
Unfortunately, I could not reproduce it with the official video player example. Here's a fork of Livekits Flutter Components with red video background to better see effect:
livekit/components-flutter@main...holzgeist:components-flutter:debug-impeller-render-issue
Screenshots or Video
Impeller/Vulkan
Impeller/OpenGLES
Skia
Logs
Flutter Doctor output
Doctor output
[✓] Flutter (Channel stable, 3.41.2, on Arch Linux 6.18.9-arch1-2, locale en_US.UTF-8) [34ms]
• Flutter version 3.41.2 on channel stable at /home/tobias/src/3rdparty/flutter
• Upstream repository https://github.com/flutter/flutter
• Framework revision 90673a4eef (6 days ago), 2026-02-18 13:54:59 -0800
• Engine revision 6c0baaebf7
• Dart version 3.11.0
• DevTools version 2.54.1
• Feature flags: enable-web, enable-linux-desktop, enable-macos-desktop, enable-windows-desktop, enable-android, enable-ios, cli-animations, enable-native-assets,
omit-legacy-version-file, enable-lldb-debugging, enable-uiscene-migration
[✓] Android toolchain - develop for Android devices (Android SDK version 36.0.0) [1,945ms]
• Android SDK at /home/tobias/Android/Sdk
• Emulator version 36.3.10.0 (build_id 14472402) (CL:N/A)
• Platform android-36, build-tools 36.0.0
• ANDROID_HOME = /home/tobias/Android/Sdk
• Java binary at: /opt/android-studio/jbr/bin/java
This is the JDK bundled with the latest Android Studio installation on this machine.
To manually set the JDK path, use: `flutter config --jdk-dir="path/to/jdk"`.
• Java version OpenJDK Runtime Environment (build 21.0.9+-14649483-b1163.86)
• All Android licenses accepted.
[✓] Chrome - develop for the web [6ms]
• Chrome at google-chrome
[✓] Linux toolchain - develop for Linux desktop [526ms]
• clang version 21.1.8
• cmake version 4.2.3
• ninja version 1.13.2
• pkg-config version 2.5.1
• OpenGL core renderer: AMD Radeon 740M Graphics (radeonsi, phoenix, LLVM 21.1.6, DRM 3.64, 6.18.9-arch1-2)
• OpenGL core version: 4.6 (Core Profile) Mesa 25.3.5-arch1.1
• OpenGL core shading language version: 4.60
• OpenGL ES renderer: AMD Radeon 740M Graphics (radeonsi, phoenix, LLVM 21.1.6, DRM 3.64, 6.18.9-arch1-2)
• OpenGL ES version: OpenGL ES 3.2 Mesa 25.3.5-arch1.1
• OpenGL ES shading language version: OpenGL ES GLSL ES 3.20
• GL_EXT_framebuffer_blit: yes
• GL_EXT_texture_format_BGRA8888: yes
[✓] Connected device (3 available) [461ms]
• SM A145R (mobile) • 172.16.60.78:46423 • android-arm64 • Android 15 (API 35)
• Linux (desktop) • linux • linux-x64 • Arch Linux 6.18.9-arch1-2
• Chrome (web) • chrome • web-javascript • Chromium 145.0.7632.109 Arch Linux
[✓] Network resources [241ms]
• All expected network resources are available.
• No issues found!