Question: compress 8GB file to 800MB file before upload to server

[elie222]

I'm looking to compress an 8GB video in the browser prior to uploading it to a server. The goal is faster upload and the server does need that level of quality.

This is the exact command I use with ffmpeg which takes around 15 minutes when run natively:

ffmpeg -i testvideo.mp4 -c:v libx264 -preset slow -crf 25 -vf scale=720:-2 -x264-params keyint=25:keyint_min=25 -an -f mp4 output.mp4

Are there known memory limits or other limits I will hit using this library that will stop me achieving this goal?

[elie222]

Ran it on a sample test case and significantly slower than running it natively:
https://gist.github.com/elie222/bf99c425858ccf0d524c3533560c481b

Didn't try on 8GB file yet.

[jeromewu]

In fact, WebAssembly version (ffmpeg.js) is doomed to be slower than native version due to many aspects, so I would recommend you to use native version if performance is critical to you.