Handbrake is a great tool for anyone who wants to convert audio or video files from one format to another. The program is completely free and open source, built by volunteers, with tons of great features.
It is available for all platforms (Windows, macOS and Linux) and has a very friendly user interface even for novice users who have never dealt with video editing-converting.
Get started with HandBrake in seconds by choosing one of the profiles that already exist for each device you're interested in (default conversion types) or choose a universal profile for standard or high-quality conversions.
For example you can convert videos to iPhone, PSP or any other device you care about very quickly with one option.
In addition to the conversions, it also has the Chapter option. It performs basic subtitling by adding subtitles on top of the video, and has a built-in bitrate calculator. At the same time, it also has basic functions for deinterlacing, decomb, denoise, detelecine, deblock, grayscale, colourspace, cropping and scaling
It's simple, easy and fast. For those who want more options, they can modify the default conversion types that the app has to suit them.
File Containers: .MP4, .MKV and WebM
Video Encoders: AV1, H.265 and H.264, MPEG-4 and MPEG-2, VP8 and VP9
Optional Hardware accelerated video encoding
Audio Encoders: AAC / HE-AAC, MP3, FLAC, AC3, E-AC3, Opus and Vorbis
Audio Pass-thru: AC-3, E-AC3, FLAC, DTS, DTS-HD, TrueHD, AAC, Opus, MP3 and MP2 tracks
Download the application on the platform you are interested in