diff --git a/apps/ios/VMC.xcodeproj/project.pbxproj b/apps/ios/VMC.xcodeproj/project.pbxproj
index 3f77350..faa23f1 100644
--- a/apps/ios/VMC.xcodeproj/project.pbxproj
+++ b/apps/ios/VMC.xcodeproj/project.pbxproj
@@ -345,7 +345,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 57;
+				CURRENT_PROJECT_VERSION = 58;
 				DEVELOPMENT_TEAM = X25NYX3K49;
 				ENABLE_BITCODE = NO;
 				ENABLE_PREVIEWS = YES;
@@ -360,7 +360,7 @@
 				"$(inherited)",
 				"@executable_path/Frameworks"
 				);
-				MARKETING_VERSION = 0.5.44;
+				MARKETING_VERSION = 0.5.45;
 				OTHER_LDFLAGS = ("$(inherited)", "-ObjC");
 				PRODUCT_BUNDLE_IDENTIFIER = nl.vonas.mediacluster.ios;
 				PRODUCT_NAME = "$(TARGET_NAME)";
@@ -378,7 +378,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				ASSETCATALOG_COMPILER_GLOBAL_ACCENT_COLOR_NAME = AccentColor;
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 57;
+				CURRENT_PROJECT_VERSION = 58;
 				DEVELOPMENT_TEAM = X25NYX3K49;
 				ENABLE_BITCODE = NO;
 				ENABLE_PREVIEWS = YES;
@@ -393,7 +393,7 @@
 				"$(inherited)",
 				"@executable_path/Frameworks"
 				);
-				MARKETING_VERSION = 0.5.44;
+				MARKETING_VERSION = 0.5.45;
 				OTHER_LDFLAGS = ("$(inherited)", "-ObjC");
 				PRODUCT_BUNDLE_IDENTIFIER = nl.vonas.mediacluster.ios;
 				PRODUCT_NAME = "$(TARGET_NAME)";
diff --git a/apps/ios/VMC/Playback/CencMp4Decryptor.swift b/apps/ios/VMC/Playback/CencMp4Decryptor.swift
index e6898b7..1415577 100644
--- a/apps/ios/VMC/Playback/CencMp4Decryptor.swift
+++ b/apps/ios/VMC/Playback/CencMp4Decryptor.swift
@@ -456,7 +456,11 @@ enum CencMp4Decryptor {
                 )
             }
 
-            guard !sampleSizes.isEmpty, sencSamples.count == sampleSizes.count || sencSamples.isEmpty == false else {
+            // cbcs audio (F1TV): tenc heeft constant_IV + iv_size=0, fragmenten hebben géén senc.
+            // ISO 23001-7: elk sample ontsleutelen met die IV (geen per-sample IV, geen subsample).
+            let constantIv = crypto?.constantIv
+            let canUseConstantIv = (constantIv?.count ?? 0) >= 8
+            guard !sampleSizes.isEmpty, !sencSamples.isEmpty || canUseConstantIv else {
                 diag("frag track=\(trackId) skip: samples=\(sampleSizes.count) senc=\(sencSamples.count) tfhd=0x\(String(tfhdFlagsSeen, radix: 16)) trun=0x\(String(trunFlagsSeen, radix: 16))")
                 // Advance cursor even if we cannot decrypt.
                 for sz in sampleSizes { mdatCursor += sz }
@@ -478,34 +482,34 @@ enum CencMp4Decryptor {
             let cryptBlocks = crypto?.cryptByteBlock ?? 0
             let skipBlocks = crypto?.skipByteBlock ?? 0
 
-            var didDecrypt = false
+            var decryptedCount = 0
             for i in 0..<sampleSizes.count {
                 let size = sampleSizes[i]
                 guard size > 0, mdatCursor + size <= data.count else { break }
                 let sampleRange = mdatCursor..<(mdatCursor + size)
                 var sample = data.subdata(in: sampleRange)
                 let senc = i < sencSamples.count ? sencSamples[i] : nil
-                if let senc {
+                let iv = senc?.iv ?? constantIv
+                if let iv {
                     if let decrypted = decryptSample(
                         sample,
                         key: key,
-                        iv: senc.iv,
-                        subsamples: senc.subsamples,
+                        iv: iv,
+                        subsamples: senc?.subsamples,
                         scheme: scheme,
                         cryptByteBlock: cryptBlocks,
                         skipByteBlock: skipBlocks
                     ) {
                         sample = decrypted
                         data.replaceSubrange(sampleRange, with: sample)
-                        didDecrypt = true
+                        decryptedCount += 1
                     }
                 }
                 mdatCursor += size
             }
-            let decryptedCount = didDecrypt ? min(sencSamples.count, sampleSizes.count) : 0
             diag("frag track=\(trackId) crypto=\(crypto != nil) scheme=\(scheme) pat=\(cryptBlocks):\(skipBlocks) samples=\(sampleSizes.count) senc=\(sencSamples.count) iv=\(sencSamples.first?.iv.count ?? 0) subs=\(sencSamples.first?.subsamples?.count ?? -1) size0=\(sampleSizes.first ?? 0) dec=\(decryptedCount) tfhd=0x\(String(tfhdFlagsSeen, radix: 16)) trun=0x\(String(trunFlagsSeen, radix: 16)) mdat=\(mdat.payloadLength)")
             // AVPlayer/VLC mogen geen tweede decrypt-poging doen op clear samples.
-            if didDecrypt {
+            if decryptedCount > 0 {
                 for senc in findBoxesInRange(data, type: "senc", from: traf.payloadStart, to: traf.payloadEnd) {
                     writeFourCC(&data, senc.start + 4, "free")
                 }
diff --git a/apps/ios/VMC/UI/SettingsScreen.swift b/apps/ios/VMC/UI/SettingsScreen.swift
index a4c15f7..c374be0 100644
--- a/apps/ios/VMC/UI/SettingsScreen.swift
+++ b/apps/ios/VMC/UI/SettingsScreen.swift
@@ -96,7 +96,7 @@ struct SettingsScreen: View {
 
             Section("Info") {
                 LabeledContent("App", value: "VMC iOS")
-                LabeledContent("Versie", value: "0.5.44")
+                LabeledContent("Versie", value: "0.5.45")
                 LabeledContent("Live TV", value: app.iptvEnabled ? "Aan" : "Uit")
                 LabeledContent("Events", value: app.eventsEnabled ? "Aan" : "Uit")
             }