If you are on Android 6.0 or later, a popup will show asking for permissions.

To enable access to storage, enter the following command in the app’s console: termux-setup-storage Enable Storage Access for Termuxīy default, Termux does not have access to the Android storage. You will be introduced to a console environment. Open the Termux app from the launcher.Here is what you need to do to easily convert your media files using FFmpeg and Termux: 1. Convert Media Files Using FFmpeg and Termux Although a plethora of media converter apps are already available on the Google Play Store, this console based solution gives full control over the codec parameters and enables conversions between the 100+ different file formats supported by FFmpeg. One of them is using FFmpeg, the swiss army knife of media manipulation tools on Linux, to convert media (audio and video) to different formats. There are many exciting things that an Android user can do with Termux. Today we’ll see how we can convert media files using FFmpeg and Termux. These packages can be downloaded and installed through the APT tool (Advanced Package Tool), known from Debian and Ubuntu desktop Linux distributions. Apart from being a terminal emulator, it also provides its own isolated Linux environment and offers a wide variety of pre-built Linux packages. Termux is probably the best terminal emulator available for Android.

Android ffmpeg tutorial