Tricycle is a free and open source video converter transcoder application for Windows and MacOS. It is based on FFmpeg, x264, and x265 and released under GNU General Public License version 2. It supports MP4 and MKV container formats, AVC (H.264) and HEVC (H.265) video formats, AAC, Dolby Digital (AC-3), Dolby TrueHD, DTS and DTS Master Audio audio formats for encoding and decodes almost all file formats.
It supports 4K resolution and HDR (HDR10) and Tonemaps HDR to SDR. You can scales your videos to standard resolutions videos and reduces the noises in your video. Another one good feature is it detects and crops black bars in your video and you can also set your crop aspect ratio.