oh well in that case there still is no need to just send 100k and hope it works, you could use websockets to push it to the service, pipe it directly into ffmpg

oh well in that case there still is no need to just send 100k and hope it works, you could use websockets to push it to the service, pipe it directly into ffmpg and when you get back a frame have websocket tell browser to stop sending data. you can do the same thing with 2 ajax requests too. one doing the upload and the other that opens a connection at the same time and waits for a success response. onreadystate 3 of the second request, abort() the upload request.