Jamcorder Video Effects

Make your videos unique with Jamcorder Video Effects.

How to Create Your Own

Effects are written using shadertoy.com, using computer code.

This is a very powerful and rewarding technique.

For newcomers, I recommend starting with The Art of Code YouTube tutorial.

Overtime, more pre-built effects will become available even for people that are not programmers.

Step 1. Write Your Shader on Shadertoy.com

To support midi music, Jamcorder adds a few extra uniforms. Use the shim to simulate them on Shadertoy.

uniform vec4      mtNotes[800]; // midi notes (start, duration, note, velocity)
uniform int       mtNoteCount;  // length of mtNotes
uniform float     mtTime;       // position within song (seconds)
uniform float     mtTimeDelta;  // position change since last frame (0 == paused)
uniform float     mtPps;        // pixels per second
            

Step 2. Verify Your Shader in MidiToy

Once you're happy with your shader, verify it's compatible with Jamcorder using MidiToy.

Jamcorder defaults to 720p, 30fps, portrait orientation.

Step 3. Export Your Effect as a PNG

Video effects are stored in a special PNG format. Here is a real example.

If you zoom in, you can see special pixels at the top that represent the effect code.

Step 4. Use it in Jamcorder!

Your video effect PNG can be loaded into the Jamcorder app. Congrats! You're done!

Publishing on Shadertoy

Add these tags to make your effects easier to find on Shadertoy

Submit to Jamcorder

Submit your effect to [email protected] with 'Jamcorder VFX' in the email title.

The best effects will be added to the Jamcorder app.

If chosen, we'll send you a custom Jamcorder T-Shirt! Thanks!

Share on Reddit

Check out /r/jamcorder