More likely: friendlyelec is maintaining a separate patch (source code additions to the official ffmpeg), that allows it to do it. The code should be available in the friendlyelec github, to be shared with the public. "No v4l2request"... that means that they implemented another protocol and/or another kernel module to work with the video decoder.

Thank you for your reply. My H96 Max M9 is running Android 14 with the original stock firmware. I have not installed Armbian or any Linux-based operating system. Therefore, I don't think I can run sudo armbianmonitor -u on the TV box. Is there an equivalent way to collect and share the Android system logs, for example using ADB and adb logcat or dmesg? The problem appears when Android's system file picker/Storage Access Framework is used by applications such as PPSSPP and Dolphin Emulator.

6.18.10 or 6.18.35? Gnome build? I look for kernels in armbianconfig... Ernst

Hi Armbuilder, I tried them all but only 6.1.115 made the internal WiFi work. Are there different versions of the board maybe? Ernst

@robertoj: $ ffmpeg ffmpeg: symbol lookup error: ffmpeg: undefined symbol: av_buffersrc_get_status, version LIBAVFILTER_10 Looks like Friendlyelec deleted some functions in their version of the library, or based it on an outdated version. ffmpeg is version 7:7.1.5-0+deb13u1 Filename: pool/main/f/ffmpeg/ffmpeg_7.1.5-0+deb13u1_arm64.deb MD5sum: 18e560e3b4c4b992d74d2bf3020d9a53 No v4l2request info with `mpv -v`