help building for mobile

HI!

I’m new here, I loved this work, an amazing work, very thanks to produce this. But I’m facing some problems and I need some help, I tried my best. I’m trying to run this for mobile, latest chrome, I got the next error: Uncaught (in promise) RangeError: WebAssembly.Memory(): could not allocate memory I searched here, I must build the ffmpeg with 0.5 GB or less. I did, after facing problems and hours.

Then I got this error: Uncaught (in promise) RuntimeError: abort(Assertion failed: Cannot call unknown function proxy_main, make sure it is exported). Build with -s ASSERTIONS=1 for more info Searched, I must replace proxy_main with main, I did

And finally worked! But what? After selecting the audio, the browser freeze! I opened console, got this: [fferr] Blocking on the main thread is very dangerous, see https://emscripten.org/docs/porting/pthreads.html#blocking-on-the-main-browser-thread

Now… what? The build process takes 2 hours to end, this happens with -s INITIAL_MEMORY=268435456 ~= 256MB of ram. Is 256MB is the reason? Or what can i do?

And if anyone built this for mobile and worked, can I get the built?

Thanks, and thanks for reading

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[JuanGuerreroUP]

First of all, I think this issue should be moved to ffmpeg.wasm-core.

I know this issue is a bit old. But I presented the same problem @MostafaRabia described. However, I was able to solve it. To solve that I cloned the repository (ffmpeg.wasm-core) using git and ran: git checkout b59fb55619. I found out that the build script do not work well in versions after b59fb55. Then I configured build-ffmpeg.sh with these flags:

  -s INITIAL_MEMORY=536608768
  -s ALLOW_MEMORY_GROWTH=1
  -s ASSERTIONS=1

And after a while… it worked. (I did not change anything else in the repository, I did not even replaced proxy_main with main).

I am running Ubuntu 20 and used docker with a fresh image of emscripten/emsdk to make the build. I hope that helps!