Awesome

StudioTVPlayer

A simple TV studio player with SDI, NDI and MPEG TS outputs for Windows

Few players inside one application, controlled using mouse and keyboard shortcuts, i.e. A/B playout plus wallscreen on single UI
Almost any file format can be played - it uses FFmpeg under the hood
Uses Blackmagic Design Decklink cards as SDI outputs and inputs
Can also output to NDI and MPEG-TS streams
Can play files with alpha channel (transparency), with key & fill on separate SDI outputs of supporting Decklink cards (i.e. Duo 2, 8K Pro, Extreme 4K)
Watched folders with clip thumbnails with [NEW] quick search
Drag & drop files to rundown from watched folder or directly from Windows Explorer
Audio level adjustment for playing file (+/- 15 dB)
Simple rundowns, with option to loop whole rundown or individual files
Time/Timecode input and output on RP-188 VANC stream or overlay on video (can be set for single output)
Multiple outputs for single player, i.e. one with and one w/o timecode overlay
Decklink input recording, with ability to play file while recording
10-bit processing and output on Decklink (not recommended with overlays)
[NEW] Player control (e.g. play, cue) integration with Blackmagic Atem switcher and Elgato StreamDeck

Windows 7 or newer with .Net Framework 4.8 installed
C++ for Visual Studio 2019 redistribuable
NDI Runtime - if you want to use NDI output
Decklink drivers (version 11.5 or newer), if any Blackmagic card will be in use.