I am trying to get a screenshot of a video on android 9 using standard command:
adb shell screencap -p /sdcard/printscreen.png
That works fine with any static content but just returns a black picture when trying to get screenshot of a video. I have seen quite a few similar questions, however do not seem to find an answer. Any suggestions?
The issue seems to come from OpenGL. I have it working with:
1 - Open VLC on Android device
2 - Goto: Other => Settings
3 - Goto: Advanced => OpenGL ES2 usage
4 - Select "Force On"
5 - Back up one level, and select "Quit and restart application"
Alternatively, add the following line to data/data/org.videolan.vlc/shared_prefs/org.videolan.vlc_preferences.xml
<string name="opengl">1</string>
Now, the following command should work
adb shell screencap /sdcard/printscreen.png