We run an instance on EC2. We are recording FLVs from a small flash client on our server. Everything works fine, but a lot of videos get recorded without sound and the picture being black. If I load the respective FLV locally the VLC Player it says the codec is "undf", and it can't replay the video.
Since we noticed this, we are analyzing the clients of our users. It seems that everybody who uses Windows 8 is not able to record a video. Do you have any clue on what this might depend on and if there is a workaround? Is it possible that the codecs on windows 8 are not the right ones and we should do something with the uploaded stream on server side?
Any help would be appriciated, don't hesitate to contact me!