Flix Player is one of the best in the audio video player category. Flix Player can also play Ultra HD video files.

Supported formats
* Audio: Vorbis, Opus, FLAC, ALAC, PCM/WAVE (μ-law, A-law),AMR (NB, WB), AAC, MP1, MP2, MP3, AC-3, E-AC-3, DTS, DTS-HD, TrueHD (LC, ELD, HE; xHE on Android 9+)
* Video: H.263, H.264 AVC (Baseline Profile; Main Profile on Android 6+), H.265 HEVC, MPEG-4 SP, VP8, VP9, AV1
* Containers: WebM, MKV, Ogg, MPEG-TS, MPEG-PS ,MP4, MOV, FLV
* Streaming: HLS, SmoothStreaming,DASH, RTSP
* Subtitles: VTT, SRT, SSA, TTML

Features
* Pinch to zoom (Android 7+)
* PiP (Picture in Picture) on Android 8+ (resizable on Android 11+)
* Audio/subtitle track selection
* Playback speed control
* Horizontal swipe and double tap to quickly seek
* Vertical swipe to change brightness (left) / volume (right)
* Resize (fit/crop)
* Volume boost
* Auto frame rate matching on Android TV/boxes (Android 6+)
* Post-playback actions (delete file/skip to next)

To load external (non-embedded) subtitles, long-press the file open action in the bottom bar. The first time you do this, you'll be prompted to select the root video folder to enable automatic loading of external subtitles.