HTTP/HTTPS Proxy and FFmpeg

As per the source,

if (!strcmp(proto, "https")) {
    lower_proto = "tls";
    use_proxy   = 0;

so the ffmpeg command line option won't work.

However, the secure transport does appear to allow proxy use if you supply the path using an environment variable.

proxy_path = getenv("http_proxy");
...

if (use_proxy) {
    char proxy_host[200]...

I'll see if the CLI option can be added.