diff --git a/Dockerfile b/Dockerfile
index 4daf603..af4f2aa 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,17 +2,17 @@ ARG JITSI_REPO=jitsi
 ARG BASE_TAG=stable
 FROM ${JITSI_REPO}/base-java:${BASE_TAG}
 
+RUN apt-dpkg-wrap apt-get update && \
+    apt-dpkg-wrap apt-get install -y jq ffmpeg bc && \
+    apt-cleanup
+
+
 LABEL org.opencontainers.image.title="Jitsi Multitrack Recorder"
 LABEL org.opencontainers.image.description="An audio recording component."
 LABEL org.opencontainers.image.url="https://github.com/jitsi/jitsi-multitrack-recorder"
 LABEL org.opencontainers.image.source="https://github.com/jitsi/jitsi-multitrack-recorder"
 LABEL org.opencontainers.image.documentation="https://github.com/jitsi/jitsi-multitrack-recorder"
 
-
 COPY target/jitsi-multitrack-recorder-0.1-SNAPSHOT-jar-with-dependencies.jar /jmr/
+COPY scripts/* /scripts/
 COPY rootfs/ /
-
-
-
-VOLUME /config
-
diff --git a/rerun.sh b/rerun.sh
index b3c9082..9483498 100755
--- a/rerun.sh
+++ b/rerun.sh
@@ -1,6 +1,8 @@
+#!/bin/bash
 set -e
 set -x
 
 mkdir -p ~/recordings
 mvn install -DskipTests -Dktlint.skip
-docker build -t jitsi-multitrack-recorder:latest . && docker run -p 8989:8989 -v ~/recordings:/data jitsi-multitrack-recorder:latest
+docker build -t jitsi-multitrack-recorder:latest .
+docker run -e JMR_FINALIZE_SCRIPT=/scripts/finalize-flatten.sh -p 8989:8989 -v ~/recordings:/data jitsi-multitrack-recorder:latest
diff --git a/rootfs/defaults/jmr.conf b/rootfs/defaults/jmr.conf
index 7bed79b..8458e55 100644
--- a/rootfs/defaults/jmr.conf
+++ b/rootfs/defaults/jmr.conf
@@ -7,4 +7,7 @@ jitsi-multitrack-recorder {
     {{- end }}
     directory = {{ $JMR_DIRECTORY }}
   }
+  {{- if .Env.JMR_FINALIZE_SCRIPT }}
+  finalize-script = "{{ .Env.JMR_FINALIZE_SCRIPT }}"
+  {{- end }}
 }
diff --git a/scripts/finalize-flatten.sh b/scripts/finalize-flatten.sh
new file mode 100755
index 0000000..9037b2a
--- /dev/null
+++ b/scripts/finalize-flatten.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+set -e
+set -x 
+
+MEETING_ID=$1
+DIR=$2
+FORMAT=$3
+
+
+echo "Running $0 for $MEETING_ID, $DIR, $FORMAT" 
+
+if [[ "$FORMAT" == "MKA" ]] ;then
+  /scripts/flatten-mka.sh "${DIR}/recording.mka" "${DIR}/recording-flat.wav"
+fi
+
+if [[ "$JMR_FINALIZE_WEBHOOK" != "" ]] ;then
+  curl -s -o /dev/null "$JMR_FINALIZE_WEBHOOK?meetingId=$MEETING_ID"
+fi
diff --git a/src/main/kotlin/org/jitsi/recorder/Config.kt b/src/main/kotlin/org/jitsi/recorder/Config.kt
index d500569..f4af532 100644
--- a/src/main/kotlin/org/jitsi/recorder/Config.kt
+++ b/src/main/kotlin/org/jitsi/recorder/Config.kt
@@ -19,12 +19,14 @@ package org.jitsi.recorder
 
 import org.jitsi.config.JitsiConfig
 import org.jitsi.metaconfig.config
+import org.jitsi.metaconfig.optionalconfig
 import kotlin.time.Duration
 import kotlin.time.toKotlinDuration
 
 class Config {
     companion object {
         const val BASE = "jitsi-multitrack-recorder"
+
         val port: Int by config {
             "$BASE.port".from(JitsiConfig.newConfig)
         }
@@ -45,11 +47,16 @@ class Config {
             }
         }
 
+        val finalizeScript: String? by optionalconfig {
+            "$BASE.finalize-script".from(JitsiConfig.newConfig)
+        }
+
         override fun toString(): String = """
             port: $port
             recordingDirectory: $recordingDirectory
             recordingFormat: $recordingFormat
             maxGapDuration: $maxGapDuration
+            finalizeScript: $finalizeScript
         """.trimIndent()
     }
 }
diff --git a/src/main/kotlin/org/jitsi/recorder/Main.kt b/src/main/kotlin/org/jitsi/recorder/Main.kt
index 6d7151b..995fa1f 100644
--- a/src/main/kotlin/org/jitsi/recorder/Main.kt
+++ b/src/main/kotlin/org/jitsi/recorder/Main.kt
@@ -86,13 +86,14 @@ fun main(args: Array<String>) {
         .start(wait = true)
 }
 
-class RecordingSession(val meetingId: String) {
+class RecordingSession(private val meetingId: String) {
     private val logger = createLogger().apply { addContext("meetingId", meetingId) }
+    private val directory = selectDirectory(meetingId)
 
     private val mediaJsonRecorder = if (Config.recordingFormat == RecordingFormat.MKA) {
-        MediaJsonMkaRecorder(selectDirectory(meetingId), logger)
+        MediaJsonMkaRecorder(directory, logger)
     } else {
-        MediaJsonJsonRecorder(selectDirectory(meetingId))
+        MediaJsonJsonRecorder(directory)
     }
 
     fun processText(text: String) {
@@ -105,6 +106,21 @@ class RecordingSession(val meetingId: String) {
 
     fun stop() = mediaJsonRecorder.stop().also {
         logger.warn("Stopping")
+        if (!Config.finalizeScript.isNullOrBlank()) {
+            logger.warn("Running finalize script")
+            val process = ProcessBuilder(
+                Config.finalizeScript,
+                meetingId,
+                directory.absolutePath,
+                Config.recordingFormat.toString()
+            ).apply {
+                val logFile = File(directory, "finalize.log")
+                redirectOutput(logFile)
+                redirectError(logFile)
+            }.start()
+            val ret = process.waitFor()
+            logger.warn("Finalise script returned $ret")
+        }
     }
 
     fun selectDirectory(meetingId: String): File {
diff --git a/src/main/resources/reference.conf b/src/main/resources/reference.conf
index 35fcef6..469848a 100644
--- a/src/main/resources/reference.conf
+++ b/src/main/resources/reference.conf
@@ -6,5 +6,6 @@ jitsi-multitrack-recorder {
     // The maximum duration of a gap to repair using Opus PLC.
     max-gap-duration = 5 minutes
   }
+  // finalize-script = /path/to/finalize.sh
   port = 8989
 }