reverse caching proxy

[TransformX]

Hi guys,

If anyon here has experience with Varnish / Nginx, I could use some help.

I need to set them up (emphasis on Varnish but Nginx help would be also very welcome) to cache and serve all static content, including video (h264 .mp4) steraming.
I am running Varnish 3.02-Streaming2

My VCL looks likee that:

backend default {
.host = "mysite.com";
.port = "80";
}

sub vcl_recv {

    if (req.http.Accept-Encoding) {
        if (req.url ~ "\.(jpg|png|gif|gz|tgz|bz2|tbz|mp3|ogg|mp4)$") {
            # No point in compressing these
            remove req.http.Accept-Encoding;
        } else if (req.http.Accept-Encoding ~ "gzip") {
            set req.http.Accept-Encoding = "gzip";
        } else if (req.http.Accept-Encoding ~ "deflate") {
            set req.http.Accept-Encoding = "deflate";
        } else {
            # unknown algorithm
            remove req.http.Accept-Encoding;
        }
    }

    set req.backend = default;

    if (req.http.host == "videostream.mysite.com") {
        return (pipe);

    if (req.url ~ "\.(jpeg|jpg|png|gif|ico|swf|js|css|txt|gz|zip|rar|bz2|tgz|tbz|html|htm|pdf|mp4)$") {
         unset req.http.cookie;
	 set req.grace = 5m;
         return(lookup);
     }
     return(pass);
}

sub vcl_fetch { 
     		set beresp.do_stream = true;
}

My problem is that if I change the return from pipe (which is a passthrough) to lookup on the video stream, the video arrives slower than through pipe and broken (frozen images and I think some audio problems as well).

[TransformX]

I've found the culprit and it's probably not Varnish. A clean installation on my home PC worked flawlessly so I've started some further testings with wget and curl to finally found out a certain component in our system was giving out a (very) different url whenever Varnish was set to lookup. Will probably solve the issue once and for all today.