Yah, if one of the original WU guys does Ambientweather.net now, it might be worth looking at. Also, a lot of people use a MeteoBridge device to get their PWS info uploaded, which I think can upload to the Ambient Weather network. But I think if you didn't buy a device from Ambient Weather, then you have to pay to upload or something (I could be wrong about that, I'm trying to remember something I read a while back).
As Sebastian said, your filename has to be "image.jpg". The ftp server will see that file after a minute or two and move it away to wherever it does the processing (you won't see it there anymore). I don't think they still have the 150KB file size limit though. I don't do any downsizing or anything, I just let BI ftp my full 2MP cam image as is, and it works. My jpg file sizes are around 350KB each. As a test, I just took a snapshot from my weather cam and re-saved it with a much higher jpg quality setting to get it up to about 900KB. I manually uploaded it to WU, and WU saved and processed it into my camera stream.
Here's a theory I have about how to get your camera stream to show up. You can use your favorite ftp client like Filezilla to test the ftp process and make sure that it's working ok, as you're doing. But to get your stream to actually show up, I think you have to set up your automatic ftp from BI (or from the camera or whatever). The point is, it
seems like you have to have a bunch of images consistently uploaded before it will start displaying on WU. The first time I did it, like you, I did a bunch of manual tests, and I even saw the image.jpg files disappear from the directory a few minutes after uploading them. But they didn't start displaying on WU until after a couple hours. Maybe it's because the WU image processor waits to make sure you have a consistently reliable upload? Maybe it's because it needs a certain number of images uploaded before it can start making the time lapse? Maybe it's some other dumb reason that only the WU dummies have some reason for. But whatever it is, once you have tested it manually as you have, then turn BI loose on it and let it upload an image every 60 seconds. Then take a look at your WU page after an hour or so (do a full refresh of the page).
If you're interested, here's my weather cam:
Edit: I just tried manually ftp'ing to webcam.wunderground.com rather than the explicit IP address of 52.36.136.128. It did NOT work. I was able to sign in and did a "put image.jpg" which it said was successful. But the file did NOT show up in the directory, and I don't think it was because of the server quickly moving it away. So it looks like that's still broken and you're stuck using the explicit IP address. Incidentally, the IP addresses that webcam.wunderground.com resolves to are:
> webcam.wunderground.com
Server: 192.168.26.1
Address: 192.168.26.1#53
Non-authoritative answer:
Name: webcam.wunderground.com
Address: 52.36.136.128
Name: webcam.wunderground.com
Address: 52.37.52.183
Name: webcam.wunderground.com
Address: 54.148.11.142
The one that I hit that didn't work was 54.148.11.142. So for now, I suggest explicitly using 52.36.136.128.