Add API and WebUI to export recordings (#6550)

* Add ability to export frigate clips

* Add http endpoint

* Add dir to nginx

* Add webUI

* Formatting

* Cleanup unused

* Optimize timelapse

* Fix pts

* Use JSON body for params

* Use hwaccel to encode when available

* Print ffmpeg command when fail

* Print ffmpeg command when fail

* Add separate ffmpeg preset for timelapse

* Add docs outlining the export directory

* Add export docs

* Use ''

* Fix playlist max time

* Lower max playlist time

* Add api docs for export

* isort fixes

docker/rootfs/usr/local/nginx/conf/nginx.conf

@@ -172,6 +172,27 @@ http {
             root /media/frigate;
         }
 
+        location /exports/ {
+            add_header 'Access-Control-Allow-Origin' "$http_origin" always;
+            add_header 'Access-Control-Allow-Credentials' 'true';
+            add_header 'Access-Control-Expose-Headers' 'Content-Length';
+            if ($request_method = 'OPTIONS') {
+                add_header 'Access-Control-Allow-Origin' "$http_origin";
+                add_header 'Access-Control-Max-Age' 1728000;
+                add_header 'Content-Type' 'text/plain charset=UTF-8';
+                add_header 'Content-Length' 0;
+                return 204;
+            }
+
+            types {
+                video/mp4 mp4;
+            }
+
+            autoindex on;
+            autoindex_format json;
+            root /media/frigate;
+        }
+
         location /ws {
             proxy_pass http://mqtt_ws/;
             proxy_http_version 1.1;