Fooling Around

// Oprogramowanie Roman Ryltsov

TRENDnet Cameras Online

Posted on by Roman

Found at http://trendnet.com/demo/

One more time TRENDnet guys proved they can screw any great idea. M-JPEG content sent by TV-IP422W cameras has no indication of proper MIME type. We can survive this, thanks blokes you are at least giving Content-Length value! The major problem is that IJG decoder stumbles with exception on the JPEGs: each frame is prepended by 28 byte informational header (hopefully – I will have to look into the source code to find out) messing video decoder. I hope in future TRENDnet devs will discover APPn JPEG markers or multipart/mixed content-type subheaders and find it more approprioate to put this information into these cozy places.

TV-IP301W just has a typo in multipart/mixed header:

GET /goform/video3 HTTP/1.0
User-Agent:
Authorization: Basic Z3Vlc3Q6Z3Vlc3Q=
Connection: Keep-Alive

Content-Type: multipart/mixed;boundry=cellvision
–cellvisionContent-Type: image/mpeg
HTTP/1.1 200 OK

OMG!!! Response line goes after Content-Type header… There is just nothing to say about this.

By “image/mpeg” (I have not found it in MIME type reference) they mean server-pushed stream of JPEG images, by the way.

BUT! These new models TV-IP212/TV-IP212W/TV-IP312/TV-IP312W/TV-IP422/TV-IP422W are much much better than older on the product line and they are still not expensive. I believe they are going to be very popular.

See also:

Leave a Reply