SoundFix identifies the song in your recorded video, looks it up on YouTube, downloads a high-quality version, synchronizes it with your recorded audio and puts it back into the video you recorded.
Typical usage:
Latest build: http://patraulea.com/files/soundfix-160303.zip
FFmpeg and youtube-dl are used for video downloading and conversion. Get them from the project websites below and put the ffmpeg.exe and youtube-dl.exe in the tools/ directory:
Windows only at the moment but Qt is used for the UI and it should compile on Linux/Mac as well.