diff --git a/assets/disk0/movprobe.js b/assets/disk0/movprobe.js
deleted file mode 100644
index 65994b8..0000000
--- a/assets/disk0/movprobe.js
+++ /dev/null
@@ -1,153 +0,0 @@
-
-let filename = exec_args[1]
-
-const MAGIC = [0x1F, 0x54, 0x53, 0x56, 0x4D, 0x4D, 0x4F, 0x56]
-const port = filesystem._toPorts("A")[0]
-
-com.sendMessage(port, "DEVRST\x17")
-com.sendMessage(port, `OPENR"${filename}",1`)
-let statusCode = com.getStatusCode(port)
-
-if (statusCode != 0) {
-    printerrln(`No such file (${statusCode})`)
-    return statusCode
-}
-
-com.sendMessage(port, "READ")
-statusCode = com.getStatusCode(port)
-if (statusCode != 0) {
-    printerrln("READ failed with "+statusCode)
-    return statusCode
-}
-
-let readCount = 0
-
-function readBytes(length) {
-    let ptr = sys.malloc(length)
-    let requiredBlocks = Math.floor((readCount + length) / 4096) - Math.floor(readCount / 4096)
-
-    let completedReads = 0
-
-    //serial.println(`readBytes(${length}); readCount = ${readCount}`)
-
-    for (let bc = 0; bc < requiredBlocks + 1; bc++) {
-        if (completedReads >= length) break
-
-        if (readCount % 4096 == 0) {
-            //serial.println("READ from serial")
-            // pull the actual message
-            sys.poke(-4093 - port, 6);sys.sleep(0) // spinning is required as Graal run is desynced with the Java side
-
-            let blockTransferStatus = ((sys.peek(-4085 - port*2) & 255) | ((sys.peek(-4086 - port*2) & 255) << 8))
-            let thisBlockLen = blockTransferStatus & 4095
-            if (thisBlockLen == 0) thisBlockLen = 4096 // [1, 4096]
-            let hasMore = (blockTransferStatus & 0x8000 != 0)
-
-
-            //serial.println(`block: (${thisBlockLen})[${[...Array(thisBlockLen).keys()].map(k => (sys.peek(-4097 - k) & 255).toString(16).padStart(2,'0')).join()}]`)
-
-            let remaining = Math.min(thisBlockLen, length - completedReads)
-
-            //serial.println(`Pulled a block (${thisBlockLen}); readCount = ${readCount}, completedReads = ${completedReads}, remaining = ${remaining}`)
-
-            // copy from read buffer to designated position
-            sys.memcpy(-4097, ptr + completedReads, remaining)
-
-            // increment readCount properly
-            readCount += remaining
-            completedReads += remaining
-        }
-        else {
-            let padding = readCount % 4096
-            let remaining = length - completedReads
-            let thisBlockLen = Math.min(4096 - padding, length - completedReads)
-
-            //serial.println(`padding = ${padding}; remaining = ${remaining}`)
-
-            //serial.println(`block: (${thisBlockLen})[${[...Array(thisBlockLen).keys()].map(k => (sys.peek(-4097 - padding - k) & 255).toString(16).padStart(2,'0')).join()}]`)
-
-            //serial.println(`Reusing a block (${thisBlockLen}); readCount = ${readCount}, completedReads = ${completedReads}`)
-
-            // copy from read buffer to designated position
-            sys.memcpy(-4097 - padding, ptr + completedReads, thisBlockLen)
-
-            // increment readCount properly
-            readCount += thisBlockLen
-            completedReads += thisBlockLen
-        }
-    }
-
-    //serial.println(`END readBytes(${length}); readCount = ${readCount}\n`)
-
-    return ptr
-}
-
-function readInt() {
-    let b = readBytes(4)
-    let i = (sys.peek(b) & 255) | ((sys.peek(b+1) & 255) << 8) | ((sys.peek(b+2) & 255) << 16) | ((sys.peek(b+3) & 255) << 24)
-
-    //serial.println(`readInt(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)}, ${sys.peek(b+2)}, ${sys.peek(b+3)} = ${i}\n`)
-
-    sys.free(b)
-    return i
-}
-
-function readShort() {
-    let b = readBytes(2)
-    let i = (sys.peek(b) & 255) | ((sys.peek(b+1) & 255) << 8)
-
-    //serial.println(`readShort(); bytes: ${sys.peek(b)}, ${sys.peek(b+1)} = ${i}\n`)
-
-    sys.free(b)
-    return i
-}
-
-
-let magic = readBytes(8)
-let magicMatching = true
-
-// check if magic number matches
-MAGIC.forEach((b,i) => {
-    let testb = sys.peek(magic + i) & 255 // for some reason this must be located here
-    if (testb != b) {
-        magicMatching = false
-    }
-})
-sys.free(magic)
-if (!magicMatching) {
-    println("Not a movie file (MAGIC mismatch)")
-    return 1
-}
-
-function toCodecStr(i) {
-    let low = i & 255
-    let high = (i >> 8) & 255
-
-    return (0 == low) ? "RAW256.gz" :
-             (1 == low) ? "RAW256PAL.gz" :
-             (2 == low) ? "RAW4096.gz" :
-             (4 == low || 5 == low) ? `IPF${high+1}${(5 == low) ? "A" : ""}.gz` :
-             (16 == low) ? "MJPEG" :
-             (18 == low) ? "MPNG" :
-             (20 == low) ? "MTGA" :
-             (21 == low) ? "MTGA.gz" :
-             (255 == low) ? "(frame-dependent)" :
-             `Unknown: ${low},${high}`
-}
-
-let width = readShort()
-let height = readShort()
-let fps = readShort(); if (fps == 0) fps = 9999
-let frameTime = 1.0 / fps
-let frameCount = readInt()
-let type = readShort()
-sys.free(readBytes(12)) // skip 12 bytes
-let akku = frameTime
-let framesRendered = 0
-//serial.println(readCount) // must say 18
-//serial.println(`Dim: (${width}x${height}), FPS: ${fps}, Frames: ${frameCount}`)
-
-
-println(`Dim: ${width}x${height}`)
-println(`Frames: ${frameCount} at rate of ${fps} fps`)
-println(`Codec: ${toCodecStr(type)}`)
\ No newline at end of file
diff --git a/assets/disk0/tvdos/bin/command.js b/assets/disk0/tvdos/bin/command.js
index 659c38e..d95dd33 100644
--- a/assets/disk0/tvdos/bin/command.js
+++ b/assets/disk0/tvdos/bin/command.js
@@ -306,6 +306,9 @@ shell.parse = function(input) {
 }
 /** @return fully resolved path, starting with '\' but not a drive letter */
 shell.resolvePathInput = function(input) {
+    if (input === undefined) return undefined
+
+
     // replace slashes
     let pathstr0 = input.replaceAll('\\','/') // JS thinks '/' as a regex, so we're doing this to circumvent the issue
     let pathstr = ''
diff --git a/assets/disk0/tvdos/bin/movprobe.js b/assets/disk0/tvdos/bin/movprobe.js
new file mode 100644
index 0000000..50935cb
--- /dev/null
+++ b/assets/disk0/tvdos/bin/movprobe.js
@@ -0,0 +1,142 @@
+// usage: playmov moviefile.mov [/i]
+const MAGIC = [0x1F, 0x54, 0x53, 0x56, 0x4D, 0x4D, 0x4F, 0x56]
+const pcm = require("pcm")
+const MP2_FRAME_SIZE = [144,216,252,288,360,432,504,576,720,864,1008,1152,1440,1728]
+const fullFilePath = _G.shell.resolvePathInput(exec_args[1])
+const FILE_LENGTH = files.open(fullFilePath.full).size
+
+let seqread = require("seqread")
+seqread.prepare(fullFilePath.full)
+
+
+
+let magic = seqread.readBytes(8)
+let magicMatching = true
+
+// check if magic number matches
+MAGIC.forEach((b,i) => {
+    let testb = sys.peek(magic + i) & 255 // for some reason this must be located here
+    if (testb != b) {
+        magicMatching = false
+    }
+})
+sys.free(magic)
+if (!magicMatching) {
+    println("Not a movie file (MAGIC mismatch)")
+    return 1
+}
+
+let mp2Initialised = false
+
+let width = seqread.readShort()
+let height = seqread.readShort()
+let fps = seqread.readShort(); if (fps == 0) fps = 9999
+
+const FRAME_TIME = 1.0 / fps
+const FRAME_COUNT = seqread.readInt() % 16777216
+seqread.readShort() // skip unused field
+const audioQueueInfo = seqread.readShort()
+const AUDIO_QUEUE_LENGTH = (audioQueueInfo >> 12) + 1
+const AUDIO_QUEUE_BYTES = (audioQueueInfo & 0xFFF) << 2
+seqread.skip(10)
+
+let stats = {
+    "sync":0,
+    "background":0,
+    "ipf1":0,
+    "ipf2":0,
+    "ipf1a":0,
+    "ipf2a":0,
+    "ipf1_delta":0,
+    "ipf2_delta":0,
+    "audio_mp2":0,
+    "audio_pcm":0
+}
+
+
+let errorlevel = 0
+try {
+renderLoop:
+while (seqread.getReadCount() < FILE_LENGTH) {
+
+    let packetType = seqread.readShort()
+
+    // ideally, first two packets will be audio packets
+
+    // sync packets
+    if (65535 == packetType) {
+        stats["sync"] += 1
+    }
+    // background colour packets
+    else if (65279 == packetType) {
+        seqread.skip(4)
+
+        stats["background"] += 1
+    }
+    // video packets
+    else if (packetType < 2047) {
+        // iPF
+        if (packetType == 4) {
+            stats["ipf1"] += 1
+        }
+        else if (packetType == 5) {
+            stats["ipf1a"] += 1
+        }
+        else if (packetType == 260) {
+            stats["ipf2"] += 1
+        }
+        else if (packetType == 261) {
+            stats["ipf2a"] += 1
+        }
+        else {
+            throw Error(`Unknown Video Packet with type ${packetType} at offset ${seqread.getReadCount() - 2}`)
+        }
+
+        let payloadLen = seqread.readInt()
+        seqread.skip(payloadLen)
+    }
+    // audio packets
+    else if (4096 <= packetType && packetType <= 6143) {
+        let readLength = (packetType >>> 8 == 17) ?
+            MP2_FRAME_SIZE[(packetType & 255) >>> 1] // if the packet is MP2, deduce it from the packet type
+            : seqread.readInt() // else, read 4 more bytes
+        if (readLength == 0) throw Error("Readlength is zero")
+
+        // MP2
+        if (packetType >>> 8 == 17) {
+            stats["audio_mp2"] += 1
+            seqread.skip(readLength)
+        }
+        // RAW PCM packets (decode on the fly)
+        else if (packetType == 0x1000 || packetType == 0x1001) {
+            stats["audio_pcm"] += 1
+            seqread.skip(readLength)
+        }
+        else {
+            throw Error(`Audio Packet with type ${packetType} at offset ${seqread.getReadCount() - 2}`)
+        }
+    }
+    else {
+        println(`Unknown Packet with type ${packetType} at offset ${seqread.getReadCount() - 2}`)
+    }
+}
+}
+catch (e) {
+    printerrln(e)
+    errorlevel = 1
+}
+finally {
+    println("** Video Stats **")
+    println(`Dimension: ${width}x${height}`)
+    println(`Framerate: ${fps}`)
+    println(`Syncs: ${stats["sync"]}`)
+    println(`iPF1: ${stats["ipf1"]}`)
+    println(`iPF2: ${stats["ipf2"]}`)
+    println(`iPF1a: ${stats["ipf1a"]}`)
+    println(`iPF2a: ${stats["ipf2a"]}`)
+    println("** Audio Stats **")
+    println(`MP2: ${stats["audio_mp2"]}`)
+    println(`PCM: ${stats["audio_pcm"]}`)
+}
+
+return errorlevel
\ No newline at end of file
diff --git a/assets/disk0/tvdos/bin/playmov.js b/assets/disk0/tvdos/bin/playmov.js
index 668b676..a84c293 100644
--- a/assets/disk0/tvdos/bin/playmov.js
+++ b/assets/disk0/tvdos/bin/playmov.js
@@ -51,7 +51,7 @@ seqread.readShort() // skip unused field
 const audioQueueInfo = seqread.readShort()
 const AUDIO_QUEUE_LENGTH = (audioQueueInfo >> 12) + 1
 const AUDIO_QUEUE_BYTES = (audioQueueInfo & 0xFFF) << 2
-sys.free(seqread.readBytes(10)) // skip 12 bytes
+seqread.skip(10) // skip 12 bytes
 let audioQueuePos = 0
 let akku = FRAME_TIME
 let framesRendered = 0