To set these response headers, we will need a server. Doing this involves setting the popular COOP(cross-origin-opener-policy) and COEP(cross-origin-embedder-policy ) headers on our main document. Instead, they are isolated separately, each maintaining its unique browsing context. This state ensures that our website and cross-origin assets no longer share the same browsing context. To avoid this, any web page that needs access to these APIs needs to tell the browser explicitly it needs access to these special APIs, which will prompt the browser to put the web page in a special state known as cross-origin-isolated. ffmpeg.wasm uses this API to enable the web assembly threads spawn by its submodule to read and write to memory while performing its media manipulation.īy default, these web APIs are disabled for all web applications by most web browsers because they can be used maliciously by other cross-origin assets or windows in the same browsing context to perpetuate dangerous attacks. Only browsers with SharedArrayBuffer support can use ffmpeg.wasm, you can check HERE for the complete list.It is worth noting that the ffmpeg.wasm package uses some pretty new and Advanced web APIs, one of which is SharedArrayBuffer. You do need to be aware of the need for SharedArrayBuffer support: Update 2022 - the following library is also worth looking at for browser side - I have used it and found it works well and the performance, leveraging web assembly language is noticeably better: If you want to do it server side, in a Javascript based server like node for example, then again there are libraries available - e.g.: You would need to do some testing - video processing is very compute intensive and may not work well for you in the browser. This one is the most popular at the moment, I believe: on the users machine rather than your server, there are a number of projects which provide an ffmpeg wrapper in Javascript. If you want to do the work in the browser, i.e.
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