FFmpeg is a set of open source libraries that allow you to record, convert digital audio and video recordings in various formats. It includes libavcodec, a library for encoding and decoding audio and video, and libavformat, a library for multiplexing and demultiplexing in a media container. FLmpeg is already integrated into the program and does not require downloading additional codecs.
The conversion is done directly on the device (Internet is not required), and the conversion speed depends on the processor speed of the device.

Supported Android
(4.1 and up)
Ice Cream Sandwich (4.0 – 4.0.4),Jelly Bean (4.1 – 4.3.1),KitKat (4.4 – 4.4.4),Lollipop (5.0 – 5.1.1),Marshmallow (6.0 – 6.0.1),Nougat (7.0 – 7.1.1),Oreo (8.0-8.1), Pie(9.0)

Download FFmpeg Media Encoder v 3.0.5 APK Mod

FFmpeg Media Encoder v3.0.5 b1114 [Mod].apk