diff --git a/subprojects/gst-plugins-good/docs/gst_plugins_cache.json b/subprojects/gst-plugins-good/docs/gst_plugins_cache.json
index fbdcdf87ac..8e229c9c66 100644
--- a/subprojects/gst-plugins-good/docs/gst_plugins_cache.json
+++ b/subprojects/gst-plugins-good/docs/gst_plugins_cache.json
@@ -9572,7 +9572,7 @@
                 "long-name": "Matroska muxer",
                 "pad-templates": {
                     "audio_%%u": {
-                        "caps": "audio/mpeg:\n    mpegversion: 1\n          layer: [ 1, 3 ]\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/mpeg:\n    mpegversion: { (int)2, (int)4 }\n  stream-format: raw\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-ac3:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-eac3:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-dts:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-vorbis:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-flac:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-opus:\naudio/x-speex:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-raw:\n         format: { U8, S16BE, S16LE, S24BE, S24LE, S32BE, S32LE, F32LE, F64LE }\n         layout: interleaved\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-tta:\n          width: { (int)8, (int)16, (int)24 }\n       channels: { (int)1, (int)2 }\n           rate: [ 8000, 96000 ]\naudio/x-pn-realaudio:\n      raversion: { (int)1, (int)2, (int)8 }\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-wma:\n     wmaversion: [ 1, 3 ]\n    block_align: [ 0, 65535 ]\n        bitrate: [ 0, 524288 ]\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-alaw:\n       channels: { (int)1, (int)2 }\n           rate: [ 8000, 192000 ]\naudio/x-mulaw:\n       channels: { (int)1, (int)2 }\n           rate: [ 8000, 192000 ]\naudio/x-adpcm:\n         layout: dvi\n    block_align: [ 64, 8192 ]\n       channels: { (int)1, (int)2 }\n           rate: [ 8000, 96000 ]\naudio/G722:\n       channels: 1\n           rate: 16000\naudio/x-adpcm:\n         layout: g726\n       channels: 1\n           rate: 8000\n",
+                        "caps": "audio/mpeg:\n    mpegversion: 1\n          layer: [ 1, 3 ]\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/mpeg:\n    mpegversion: { (int)2, (int)4 }\n  stream-format: raw\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-ac3:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-eac3:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-dts:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-vorbis:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-flac:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-opus:\n       channels: [ 1, 8 ]\n           rate: { (int)8000, (int)16000, (int)24000, (int)32000, (int)48000 }\naudio/x-speex:\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-raw:\n         format: { U8, S16BE, S16LE, S24BE, S24LE, S32BE, S32LE, F32LE, F64LE }\n         layout: interleaved\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-tta:\n          width: { (int)8, (int)16, (int)24 }\n       channels: { (int)1, (int)2 }\n           rate: [ 8000, 96000 ]\naudio/x-pn-realaudio:\n      raversion: { (int)1, (int)2, (int)8 }\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-wma:\n     wmaversion: [ 1, 3 ]\n    block_align: [ 0, 65535 ]\n        bitrate: [ 0, 524288 ]\n       channels: [ 1, 2147483647 ]\n           rate: [ 1, 2147483647 ]\naudio/x-alaw:\n       channels: { (int)1, (int)2 }\n           rate: [ 8000, 192000 ]\naudio/x-mulaw:\n       channels: { (int)1, (int)2 }\n           rate: [ 8000, 192000 ]\naudio/x-adpcm:\n         layout: dvi\n    block_align: [ 64, 8192 ]\n       channels: { (int)1, (int)2 }\n           rate: [ 8000, 96000 ]\naudio/G722:\n       channels: 1\n           rate: 16000\naudio/x-adpcm:\n         layout: g726\n       channels: 1\n           rate: 8000\n",
                         "direction": "sink",
                         "presence": "request"
                     },
diff --git a/subprojects/gst-plugins-good/gst/matroska/matroska-mux.c b/subprojects/gst-plugins-good/gst/matroska/matroska-mux.c
index ca90b6ac35..4e9b9ac881 100644
--- a/subprojects/gst-plugins-good/gst/matroska/matroska-mux.c
+++ b/subprojects/gst-plugins-good/gst/matroska/matroska-mux.c
@@ -180,7 +180,9 @@ static GstStaticPadTemplate audiosink_templ =
         COMMON_AUDIO_CAPS "; "
         "audio/x-flac, "
         COMMON_AUDIO_CAPS "; "
-        "audio/x-opus; "
+        "audio/x-opus, "
+        "channels = (int) [ 1, 8 ], "
+        "rate = (int) { 8000, 16000, 24000, 32000, 48000 }; "
         "audio/x-speex, "
         COMMON_AUDIO_CAPS "; "
         "audio/x-raw, "