FFmpeg implements video cropping, watermarking, transcoding
Audio playback and capture library written in C,
Command library suitable for Android. It implements audio and video
Continuous display of audio spectrum from PC input or wave file
Perfect and bit-perfect PCM encoded sine wave audio test tones
A standalone lightweight auxiliary CLI video player for BlackVideo.
Extend abcm2ps to support direct generation of PNG, SVG and PDF files
A loudspeaker phase linearization, EQ and filtering tool
Hyperactive S/W for HTML-Thumbnail generation in C