I know this number change each room, but i don't know if it changes each streaming, you would need to check the same streaming at different times... but anyway the code is there on the html of the model page, if you're going to do it by command line you would need to download and process it with some script, you could use php for example. all the relevant info is inside the html right after this piece of code
Code:
if (HasFlash()) { EmbedViewerSwf(