Change video speed
Re-record a short video at a different playback speed for a WebM export.
Change video speed: inputs, results and limitations
Re-record a short video at a different playback speed for a WebM export.
How to use Change video speed
- Choose the appropriate input file. General limits are 30 MB per file and 100 MB total.
- Review the options before running: Start time (seconds): 0 · End time (seconds): 2 · Width: 640 · Speed multiplier: 1.5 · Video bitrate (bits/second): 1500000
- Inspect the preview or result, then download a new file.
An illustrative use case
A brief demonstration shown at a 1.5 speed multiplier.
Select a real sample file you are allowed to process. Begin with a short, simple input before attempting a complex document or recording.
What to inspect in the output
Review both total duration and intelligibility. The output is re-recorded WebM, not an edit to the original file. Check the soundtrack because browser capture support differs.
Where this tool stops
Real-time WebM export with changed playback speed. Audio availability varies.
Settings and starting values
| Control | Starting value |
|---|---|
| Start time (seconds) | 0 |
| End time (seconds) | 2 |
| Width | 640 |
| Speed multiplier | 1.5 |
| Video bitrate (bits/second) | 1500000 |
Troubleshooting Change video speed
Check that the original clip plays in this browser. Keep requested times within its duration and leave this tab active while real-time recording completes. If a codec is rejected, use a supported source rather than only changing its extension.
Questions about Change video speed
Does this guarantee unchanged audio pitch?
No. Playback and sound capture depend on browser media behaviour. Listen to the output rather than assuming studio-quality time stretching.
What input does Change video speed need?
Choose video/* input. Real-time WebM export with changed playback speed. Audio availability varies.
Which options does Change video speed provide?
Start time (seconds), End time (seconds), Width, Speed multiplier, Video bitrate (bits/second). Review the starting values in the table and adjust them for your input.
Your original input is preserved. Review the new output before using it in a published page, customer delivery or production workflow.
JavaScript enables the interactive workspace.