Add new mux subdirectory for container formats

Contains the (incomplete) flavors FLV demuxer and the fragmented MP4
muxer for now.

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-rs/-/issues/173

Cargo.toml

@@ -11,10 +11,12 @@ members = [
     "audio/spotify",
 
     "generic/file",
-    "generic/fmp4",
     "generic/sodium",
     "generic/threadshare",
 
+    "mux/flavors",
+    "mux/fmp4",
+
     "net/aws",
     "net/hlssink3",
     "net/ndi",
@@ -41,7 +43,6 @@ members = [
     "video/closedcaption",
     "video/dav1d",
     "video/ffv1",
-    "video/flavors",
     "video/gif",
     "video/gtk4",
     "video/hsv",
@@ -59,9 +60,10 @@ default-members = [
     "audio/claxon",
     "audio/lewton",
 
-    "generic/fmp4",
     "generic/threadshare",
 
+    "mux/fmp4",
+
     "net/aws",
     "net/hlssink3",
     "net/onvif",

meson.build

@@ -46,10 +46,11 @@ plugins = {
   'gst-plugin-spotify': 'libgstspotify',
 
   'gst-plugin-file': 'libgstrsfile',
-  'gst-plugin-fmp4': 'libgstfmp4',
   # sodium has an external dependency, see below
   'gst-plugin-threadshare': 'libgstthreadshare',
 
+  'gst-plugin-fmp4': 'libgstfmp4',
+
   'gst-plugin-aws': 'libgstaws',
   'gst-plugin-hlssink3': 'libgsthlssink3',
   'gst-plugin-ndi': 'libgstndi',