Encoding 1 second video takes too long about ffmpeg.wasm HOT 4 CLOSED

One thing that I found is that it takes much longer if you don't copy the codecs. Try using the worker#run command with the -codec copy argument after the input and before the output. This sped up my transcode times by by like 15x.

Example
await worker.run("-i in.mkv -codec copy out.mp4");

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@birbe what's your benchmark for encoding 1 second video over ffmpeg.js?

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Use -codec copy is one way to speed up. Also you can try to use other preset:

https://stackoverflow.com/questions/39473434/ffmpeg-command-for-faster-encoding-at-a-decent-bitrate-with-smaller-file-size/39475766

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This solves the problem: '-preset', 'ultrafast'

Example:
await ffmpeg.run("-i", "input. mkv", '-preset', 'ultrafast', "output.mp4");

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