videocompare: Update README with reference

README.md

@@ -92,6 +92,7 @@ You will find the following plugins in this repository:
     - `videofx`: Plugin with various video filters.
       - `roundedcorners`: Element to make the corners of a video rounded via the alpha channel.
       - `colordetect`: A pass-through filter able to detect the dominant color(s) on incoming frames, using [color-thief](https://github.com/RazrFalcon/color-thief-rs).
+      - `videocompare`: Compare similarity of video frames. The element can use different hashing algorithms like [Blockhash](https://github.com/commonsmachinery/blockhash-rfc), [DSSIM](https://kornel.ski/dssim), and others.
 
     - `webp`: WebP decoder based on the [libwebp-sys-2](https://github.com/qnighy/libwebp-sys2-rs) library.
 

docs/plugins/gst_plugins_cache.json

@@ -7568,7 +7568,7 @@
                         "value": "3"
                     },
                     {
-                        "desc": "Blockhash: The [Blockhash](https://github.com/commonsmachinery/blockhash-rfc) algorithm.",
+                        "desc": "Blockhash: The Blockhash (block median value perceptual hash) algorithm.",
                         "name": "blockhash",
                         "value": "4"
                     }

video/videofx/src/videocompare/mod.rs

@@ -78,7 +78,7 @@ pub enum HashAlgorithm {
     DoubleGradient = 3,
 
     #[enum_value(
-        name = "Blockhash: The [Blockhash](https://github.com/commonsmachinery/blockhash-rfc) algorithm.",
+        name = "Blockhash: The Blockhash (block median value perceptual hash) algorithm.",
         nick = "blockhash"
     )]
     Blockhash = 4,