$ ffmpeg -i original.mkv -vcodec libx264 -b:v 500k -s wxga -an output.avi $ ffmpeg -i original.mkv -vn -ar 44100 -ac 2 output.wav typically created by re-rendering video, eg. Load media via USB from one's desktop - the 7' 1024圆00 WSVGA display (9' advertised, lol) natively plays MP3's and MP4's rendered as 5:3 WVGA, or WXGA. Out of the box, the tablet is a functional media player. Early on, it looked like a new sort of ROM that carefully avoids modifying PlayStore files Xposed, might be the best solution.

Still, and even though it's necessary in this case, sideloading undoubtedly carries the complications of 1) signature verification, 2) tablet compatibility, and 3) Google Store risks. Fortunately, the SELinux is natively set as 'permissive' (verify with any root validator), which is a start. BTW, since one needs to access Onda factory firmware, in order to disinfect it, some custom ROMS might be fun to attempt. The tablets require the hassle of rooting unless you can tolerate malware/adware, but at the same time, these days, we can't easily sideload APK's and ZIPs without tripping SafetyNet (more in this 7:32 video - TLDR: IP/DRM sewer strikes again) and losing access to much of Google Store. A further point of interest is it appears to have a null IMEI rooting these days (2019)It's not like it was in years past. Fun, so long as you don't mistakenly enter any personal data before rooting and cleaning their stealware. This is just enough for a fun, inexpensive virus scrubbing education. The tablets feature only 500Mb of working RAM, and 1.2 G of internal storage, half taken with bloatware.

Allwinner tablet recovery