Video tools

Convert, record and cut

Phone videos are often mov files with a variable frame rate. Convert them to mp4 and extract the sound for the audio tools.

Movie to MP3/MP4 ↗

Converts mov, avi, mpg and other formats into mp4 video or mp3 audio.

Input

video file

Output

mp4 and/or mp3

In Healthy Strings

First step for phone videos (mov) and for separating the sound.

Video Recorder and Editor ↗

Records from webcam or screen, or trims and crops an uploaded video in the browser.

Input

webcam, screen or video file

Output

webm or mp4

In Healthy Strings

Cutting a recording to the tasks of the protocol.

Batch Audio Channel Separator ↗

Splits stereo or multichannel audio files into single channels, many files at once.

Input

wav/mp3 files

Output

one file per channel

In Healthy Strings

Separating an external microphone channel from a camera channel.

Recording checklist

• Two cameras on tripods, 30° front-right and 90° right side; no zoom, no panning; at least 30, better 60 frames per second.
• Whole body, violin and the whole bow in view; constant light; autofocus and automatic exposure locked if possible.
• Mirroring off; one clap at the start (and end), visible and audible in both cameras.
• Check the frame rate after recording (e.g. MediaInfo); keep the original files unchanged.