You can convert a video to an MP3 file using Adobe Media Encoder, which can help save you storage space on your device.
To turn a video into an audio file on your iPhone, you'll need to download a third-party app from the App Store.
ks-mix - Extract video/audio and mix video/audio files. ks-crop - Crop or change aspect ratio of a video. Install ffmpeg from repository or use the package ffmpeg-7.0.2-linux-gnu-64bit-build.tar.bz2: ...