diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index dfc74858c2..34d314c55e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -17,7 +17,7 @@ jobs:
           fetch-depth: '0'
 
       - name: Set active Xcode path
-        run: sudo xcode-select -s /Applications/Xcode_12.3.app/Contents/Developer
+        run: sudo xcode-select -s /Applications/Xcode_12.4.app/Contents/Developer
 
       - name: Create canonical source directory
         run: |
@@ -40,8 +40,8 @@ jobs:
           # download bazel
           mkdir -p $HOME/bazel-dist
           pushd $HOME/bazel-dist
-          curl -O -L https://github.com/bazelbuild/bazel/releases/download/3.7.0/bazel-3.7.0-darwin-x86_64
-          mv bazel-3.7.0* bazel
+          curl -O -L https://github.com/bazelbuild/bazel/releases/download/4.0.0/bazel-4.0.0-darwin-x86_64
+          mv bazel-4.0.0* bazel
           chmod +x bazel
           ./bazel --version
           popd
diff --git a/submodules/ChatImportUI/Sources/ChatImportActivityScreen.swift b/submodules/ChatImportUI/Sources/ChatImportActivityScreen.swift
index 3cb46c59b1..f63db4ddeb 100644
--- a/submodules/ChatImportUI/Sources/ChatImportActivityScreen.swift
+++ b/submodules/ChatImportUI/Sources/ChatImportActivityScreen.swift
@@ -258,7 +258,7 @@ private final class ImportManager {
                 if !pathExtension.isEmpty, let value = TGMimeTypeMap.mimeType(forExtension: pathExtension) {
                     mimeType = value
                 }
-                return ChatHistoryImport.uploadMedia(account: account, session: session, file: tempFile, fileName: entry.0.path, mimeType: mimeType, type: entry.2)
+                return ChatHistoryImport.uploadMedia(account: account, session: session, file: tempFile, disposeFileAfterDone: true, fileName: entry.0.path, mimeType: mimeType, type: entry.2)
                 |> mapError { error -> ImportError in
                     switch error {
                     case .chatAdminRequired:
diff --git a/submodules/MediaPlayer/Sources/FFMpegAudioFrameDecoder.swift b/submodules/MediaPlayer/Sources/FFMpegAudioFrameDecoder.swift
index 8324cb4d8e..c3d0d2b570 100644
--- a/submodules/MediaPlayer/Sources/FFMpegAudioFrameDecoder.swift
+++ b/submodules/MediaPlayer/Sources/FFMpegAudioFrameDecoder.swift
@@ -11,11 +11,29 @@ final class FFMpegAudioFrameDecoder: MediaTrackFrameDecoder {
     
     private var delayedFrames: [MediaTrackFrame] = []
     
-    init(codecContext: FFMpegAVCodecContext) {
+    init(codecContext: FFMpegAVCodecContext, sampleRate: Int = 44100, channelCount: Int = 2) {
         self.codecContext = codecContext
         self.audioFrame = FFMpegAVFrame()
         
-        self.swrContext = FFMpegSWResample(sourceChannelCount: Int(codecContext.channels()), sourceSampleRate: Int(codecContext.sampleRate()), sourceSampleFormat: codecContext.sampleFormat(), destinationChannelCount: 2, destinationSampleRate: 44100, destinationSampleFormat: FFMPEG_AV_SAMPLE_FMT_S16)
+        self.swrContext = FFMpegSWResample(sourceChannelCount: Int(codecContext.channels()), sourceSampleRate: Int(codecContext.sampleRate()), sourceSampleFormat: codecContext.sampleFormat(), destinationChannelCount: channelCount, destinationSampleRate: sampleRate, destinationSampleFormat: FFMPEG_AV_SAMPLE_FMT_S16)
+    }
+    
+    func decodeRaw(frame: MediaTrackDecodableFrame) -> Data? {
+        let status = frame.packet.send(toDecoder: self.codecContext)
+        if status == 0 {
+            let result = self.codecContext.receive(into: self.audioFrame)
+            if case .success = result {
+                guard let data = self.swrContext.resample(self.audioFrame) else {
+                    return nil
+                }
+                
+                return data
+            } else {
+                return nil
+            }
+        } else {
+            return nil
+        }
     }
     
     func decode(frame: MediaTrackDecodableFrame) -> MediaTrackFrame? {
diff --git a/submodules/MediaPlayer/Sources/MediaTrackDecodableFrame.swift b/submodules/MediaPlayer/Sources/MediaTrackDecodableFrame.swift
index 692e8f6484..9c49f4da3b 100644
--- a/submodules/MediaPlayer/Sources/MediaTrackDecodableFrame.swift
+++ b/submodules/MediaPlayer/Sources/MediaTrackDecodableFrame.swift
@@ -23,4 +23,8 @@ public final class MediaTrackDecodableFrame {
         
         self.packet = packet
     }
+    
+    public func copyPacketData() -> Data {
+        return Data(bytes: self.packet.data, count: Int(self.packet.size))
+    }
 }
diff --git a/submodules/MediaPlayer/Sources/SoftwareVideoSource.swift b/submodules/MediaPlayer/Sources/SoftwareVideoSource.swift
index 1e252012a7..dfb882b54b 100644
--- a/submodules/MediaPlayer/Sources/SoftwareVideoSource.swift
+++ b/submodules/MediaPlayer/Sources/SoftwareVideoSource.swift
@@ -179,7 +179,7 @@ public final class SoftwareVideoSource {
                 if endOfStream {
                     break
                 } else {
-                    if let avFormatContext = self.avFormatContext, let videoStream = self.videoStream {
+                    if let _ = self.avFormatContext, let _ = self.videoStream {
                         endOfStream = true
                         break
                     } else {
@@ -254,3 +254,197 @@ public final class SoftwareVideoSource {
         }
     }
 }
+
+private final class SoftwareAudioStream {
+    let index: Int
+    let fps: CMTime
+    let timebase: CMTime
+    let duration: CMTime
+    let decoder: FFMpegAudioFrameDecoder
+    
+    init(index: Int, fps: CMTime, timebase: CMTime, duration: CMTime, decoder: FFMpegAudioFrameDecoder) {
+        self.index = index
+        self.fps = fps
+        self.timebase = timebase
+        self.duration = duration
+        self.decoder = decoder
+    }
+}
+
+public final class SoftwareAudioSource {
+    private var readingError = false
+    private var audioStream: SoftwareAudioStream?
+    private var avIoContext: FFMpegAVIOContext?
+    private var avFormatContext: FFMpegAVFormatContext?
+    private let path: String
+    fileprivate let fd: Int32?
+    fileprivate let size: Int32
+    
+    private var hasReadToEnd: Bool = false
+    
+    public init(path: String) {
+        let _ = FFMpegMediaFrameSourceContextHelpers.registerFFMpegGlobals
+        
+        var s = stat()
+        stat(path, &s)
+        self.size = Int32(s.st_size)
+        
+        let fd = open(path, O_RDONLY, S_IRUSR)
+        if fd >= 0 {
+            self.fd = fd
+        } else {
+            self.fd = nil
+        }
+        
+        self.path = path
+        
+        let avFormatContext = FFMpegAVFormatContext()
+        
+        let ioBufferSize = 64 * 1024
+        
+        let avIoContext = FFMpegAVIOContext(bufferSize: Int32(ioBufferSize), opaqueContext: Unmanaged.passUnretained(self).toOpaque(), readPacket: readPacketCallback, writePacket: nil, seek: seekCallback)
+        self.avIoContext = avIoContext
+        
+        avFormatContext.setIO(self.avIoContext!)
+        
+        if !avFormatContext.openInput() {
+            self.readingError = true
+            return
+        }
+        
+        if !avFormatContext.findStreamInfo() {
+            self.readingError = true
+            return
+        }
+        
+        self.avFormatContext = avFormatContext
+        
+        var audioStream: SoftwareAudioStream?
+        
+        for streamIndexNumber in avFormatContext.streamIndices(for: FFMpegAVFormatStreamTypeAudio) {
+            let streamIndex = streamIndexNumber.int32Value
+            if avFormatContext.isAttachedPic(atStreamIndex: streamIndex) {
+                continue
+            }
+            
+            let codecId = avFormatContext.codecId(atStreamIndex: streamIndex)
+            
+            let fpsAndTimebase = avFormatContext.fpsAndTimebase(forStreamIndex: streamIndex, defaultTimeBase: CMTimeMake(value: 1, timescale: 40000))
+            let (fps, timebase) = (fpsAndTimebase.fps, fpsAndTimebase.timebase)
+            
+            let duration = CMTimeMake(value: avFormatContext.duration(atStreamIndex: streamIndex), timescale: timebase.timescale)
+            
+            let codec = FFMpegAVCodec.find(forId: codecId)
+            
+            if let codec = codec {
+                let codecContext = FFMpegAVCodecContext(codec: codec)
+                if avFormatContext.codecParams(atStreamIndex: streamIndex, to: codecContext) {
+                    if codecContext.open() {
+                        audioStream = SoftwareAudioStream(index: Int(streamIndex), fps: fps, timebase: timebase, duration: duration, decoder: FFMpegAudioFrameDecoder(codecContext: codecContext, sampleRate: 48000, channelCount: 1))
+                        break
+                    }
+                }
+            }
+        }
+        
+        self.audioStream = audioStream
+        
+        if let audioStream = self.audioStream {
+            avFormatContext.seekFrame(forStreamIndex: Int32(audioStream.index), pts: 0, positionOnKeyframe: false)
+        }
+    }
+    
+    deinit {
+        if let fd = self.fd {
+            close(fd)
+        }
+    }
+    
+    private func readPacketInternal() -> FFMpegPacket? {
+        guard let avFormatContext = self.avFormatContext else {
+            return nil
+        }
+        
+        let packet = FFMpegPacket()
+        if avFormatContext.readFrame(into: packet) {
+            return packet
+        } else {
+            return nil
+        }
+    }
+    
+    func readDecodableFrame() -> (MediaTrackDecodableFrame?, Bool) {
+        var frames: [MediaTrackDecodableFrame] = []
+        var endOfStream = false
+        
+        while !self.readingError && frames.isEmpty {
+            if let packet = self.readPacketInternal() {
+                if let audioStream = audioStream, Int(packet.streamIndex) == audioStream.index {
+                    let packetPts = packet.pts
+                    
+                    let pts = CMTimeMake(value: packetPts, timescale: audioStream.timebase.timescale)
+                    let dts = CMTimeMake(value: packet.dts, timescale: audioStream.timebase.timescale)
+                    
+                    let duration: CMTime
+                    
+                    let frameDuration = packet.duration
+                    if frameDuration != 0 {
+                        duration = CMTimeMake(value: frameDuration * audioStream.timebase.value, timescale: audioStream.timebase.timescale)
+                    } else {
+                        duration = audioStream.fps
+                    }
+                    
+                    let frame = MediaTrackDecodableFrame(type: .audio, packet: packet, pts: pts, dts: dts, duration: duration)
+                    frames.append(frame)
+                }
+            } else {
+                if endOfStream {
+                    break
+                } else {
+                    if let _ = self.avFormatContext, let _ = self.audioStream {
+                        endOfStream = true
+                        break
+                    } else {
+                        endOfStream = true
+                        break
+                    }
+                }
+            }
+        }
+        
+        return (frames.first, endOfStream)
+    }
+    
+    public func readFrame() -> Data? {
+        guard let audioStream = self.audioStream, let _ = self.avFormatContext else {
+            return nil
+        }
+        
+        let (decodableFrame, _) = self.readDecodableFrame()
+        if let decodableFrame = decodableFrame {
+            return audioStream.decoder.decodeRaw(frame: decodableFrame)
+        } else {
+            return nil
+        }
+    }
+    
+    public func readEncodedFrame() -> (Data, Int)? {
+        guard let _ = self.audioStream, let _ = self.avFormatContext else {
+            return nil
+        }
+        
+        let (decodableFrame, _) = self.readDecodableFrame()
+        if let decodableFrame = decodableFrame {
+            return (decodableFrame.copyPacketData(), Int(decodableFrame.packet.duration - max(0, -decodableFrame.packet.pts)))
+        } else {
+            return nil
+        }
+    }
+    
+    public func seek(timestamp: Double) {
+        if let stream = self.audioStream, let avFormatContext = self.avFormatContext {
+            let pts = CMTimeMakeWithSeconds(timestamp, preferredTimescale: stream.timebase.timescale)
+            avFormatContext.seekFrame(forStreamIndex: Int32(stream.index), pts: pts.value, positionOnKeyframe: false)
+        }
+    }
+}
diff --git a/submodules/OpusBinding/PublicHeaders/OpusBinding/OggOpusReader.h b/submodules/OpusBinding/PublicHeaders/OpusBinding/OggOpusReader.h
index 2bfe4c5438..383b0b94e1 100644
--- a/submodules/OpusBinding/PublicHeaders/OpusBinding/OggOpusReader.h
+++ b/submodules/OpusBinding/PublicHeaders/OpusBinding/OggOpusReader.h
@@ -2,12 +2,21 @@
 
 NS_ASSUME_NONNULL_BEGIN
 
+@interface OggOpusFrame : NSObject
+
+@property (nonatomic, readonly) int numSamples;
+@property (nonatomic, strong, readonly) NSData *data;
+
+@end
+
 @interface OggOpusReader : NSObject
 
 - (instancetype _Nullable)initWithPath:(NSString *)path;
 
 - (int32_t)read:(void *)pcmData bufSize:(int)bufSize;
 
++ (NSArray<OggOpusFrame *> * _Nullable)extractFrames:(NSData *)data;
+
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/submodules/OpusBinding/Sources/OggOpusReader.m b/submodules/OpusBinding/Sources/OggOpusReader.m
index 5e8bd5af53..3df05d1b43 100644
--- a/submodules/OpusBinding/Sources/OggOpusReader.m
+++ b/submodules/OpusBinding/Sources/OggOpusReader.m
@@ -2,6 +2,37 @@
 
 #import "opusfile/opusfile.h"
 
+static int is_opus(ogg_page *og) {
+    ogg_stream_state os;
+    ogg_packet op;
+
+    ogg_stream_init(&os, ogg_page_serialno(og));
+    ogg_stream_pagein(&os, og);
+    if (ogg_stream_packetout(&os, &op) == 1)
+    {
+        if (op.bytes >= 19 && !memcmp(op.packet, "OpusHead", 8))
+        {
+            ogg_stream_clear(&os);
+            return 1;
+        }
+    }
+    ogg_stream_clear(&os);
+    return 0;
+}
+
+@implementation OggOpusFrame
+
+- (instancetype)initWithNumSamples:(int)numSamples data:(NSData *)data {
+    self = [super init];
+    if (self != nil) {
+        _numSamples = numSamples;
+        _data = data;
+    }
+    return self;
+}
+
+@end
+
 @interface OggOpusReader () {
     OggOpusFile *_opusFile;
 }
@@ -32,4 +63,132 @@
     return op_read(_opusFile, pcmData, bufSize, NULL);
 }
 
++ (NSArray<OggOpusFrame *> * _Nullable)extractFrames:(NSData *)data {
+    NSMutableArray *result = [[NSMutableArray alloc] init];
+    
+    ogg_page opage;
+    ogg_packet opacket;
+    ogg_sync_state ostate;
+    ogg_stream_state ostream;
+    int sampleRate = 48000;
+    
+    if (ogg_sync_init(&ostate) < 0) {
+        return nil;
+    }
+    
+    char *obuffer;
+    long obufferSize = (long)data.length;
+    
+    obuffer = ogg_sync_buffer(&ostate, obufferSize);
+    if (!obuffer) {
+        return nil;
+    }
+    
+    memcpy(obuffer, data.bytes, data.length);
+    // ogg_sync_wrote function is used to tell the ogg_sync_state struct how many bytes we wrote into the buffer.
+    if (ogg_sync_wrote(&ostate, obufferSize) < 0) {
+        return nil;
+    }
+    
+    int pages = 0;
+    int packetsout = 0;
+    int invalid = 0;
+    int eos = 0;
+    
+    int headers = 0;
+    int serialno = 0;
+    
+    /* LOOP START */
+    while (ogg_sync_pageout(&ostate, &opage) == 1) {
+        pages++;
+        
+        if (headers == 0) {
+            if (is_opus(&opage)) {
+                /* this is the start of an Opus stream */
+                serialno = ogg_page_serialno(&opage);
+                if (ogg_stream_init(&ostream, ogg_page_serialno(&opage)) < 0) {
+                    return nil;
+                }
+                
+                headers++;
+            } else if (!ogg_page_bos(&opage)) {
+                // We're past the header and haven't found an Opus stream.
+                // Time to give up.
+                break;
+            } else {
+                /* try again */
+                continue;
+            }
+        }
+        
+        eos = ogg_page_eos(&opage);
+        
+        /* submit the page for packetization */
+        if (ogg_stream_pagein(&ostream, &opage) < 0) {
+            return nil;
+        }
+        
+        /* read and process available packets */
+        while (ogg_stream_packetout(&ostream, &opacket) == 1) {
+            
+            packetsout++;
+            
+            int samples;
+            /* skip header packets */
+            if (headers == 1 && opacket.bytes >= 19 && !memcmp(opacket.packet, "OpusHead", 8)) {
+                headers++;
+                continue;
+            }
+            if (headers == 2 && opacket.bytes >= 16 && !memcmp(opacket.packet, "OpusTags", 8)) {
+                headers++;
+                continue;
+            }
+            
+            /* get packet duration */
+            samples = opus_packet_get_nb_samples(opacket.packet, opacket.bytes, sampleRate);
+            if (samples <= 0) {
+                invalid++;
+                continue; // skipping invalid packet
+            }
+            
+            [result addObject:[[OggOpusFrame alloc] initWithNumSamples:samples data:[NSData dataWithBytes:opacket.packet length:opacket.bytes]]];
+            
+            /* update the rtp header and send */
+            /*this->rtp.header_size = 12 + 4 * this->rtp.cc;
+            this->rtp.seq++;
+            this->rtp.time += samples;
+            this->rtp.payload_size = opacket.bytes;
+            
+            // Create RTP Packet
+            unsigned char *packet;
+            size_t packetSize = this->rtp.header_size + this->rtp.payload_size;
+            packet = (unsigned char *)malloc(packetSize);
+            if (!packet)
+                throw Napi::Error::New(info.Env(), "Couldn't allocate packet buffer.");
+            
+            // Serialize header and copy to packet. Then copy payload to packet.
+            serialize_rtp_header(packet, this->rtp.header_size, &this->rtp);
+            memcpy(packet + this->rtp.header_size, opacket.packet, opacket.bytes);
+            
+            Napi::Buffer<unsigned char> output = Napi::Buffer<unsigned char>::Copy(env, reinterpret_cast<unsigned char *>(packet), packetSize);
+            
+            push.Call(thisObj, {output});*/
+        }
+        
+        if (eos > 0) {
+            // End of the logical bitstream, clear headers to reset.
+            headers = 0;
+        }
+    }
+    
+    /* CLEAN UP */
+    if (eos > 0)
+    {
+        ogg_stream_clear(&ostream);
+        ogg_sync_clear(&ostate);
+    }
+    
+    return result;
+}
+
 @end
diff --git a/submodules/PhotoResources/Sources/PhotoResources.swift b/submodules/PhotoResources/Sources/PhotoResources.swift
index 9e195e9130..91ec1a3454 100644
--- a/submodules/PhotoResources/Sources/PhotoResources.swift
+++ b/submodules/PhotoResources/Sources/PhotoResources.swift
@@ -100,6 +100,10 @@ public func chatMessagePhotoDatas(postbox: Postbox, photoReference: ImageMediaRe
                     switch results[i].0 {
                     case .image:
                         if let data = results[i].1, data.count != 0 {
+                            if Int(fullRepresentationSize.width) > 100 && i <= 1 && !isLastSize {
+                                continue
+                            }
+                            
                             subscriber.putNext(Tuple4(nil, data, .full, isLastSize))
                             foundData = true
                             if isLastSize {
@@ -623,6 +627,11 @@ public func chatMessagePhotoInternal(photoData: Signal<Tuple4<Data?, Data?, Chat
             if let thumbnailData = thumbnailData, let imageSource = CGImageSourceCreateWithData(thumbnailData as CFData, nil), let image = CGImageSourceCreateImageAtIndex(imageSource, 0, nil) {
                 thumbnailImage = image
             }
+            
+            if quality == .blurred && fullSizeImage != nil {
+                thumbnailImage = fullSizeImage
+                fullSizeImage = nil
+            }
                         
             var blurredThumbnailImage: UIImage?
             if let thumbnailImage = thumbnailImage {
diff --git a/submodules/TelegramCore/Sources/ChatHistoryImport.swift b/submodules/TelegramCore/Sources/ChatHistoryImport.swift
index 4c93f49186..d1e5811512 100644
--- a/submodules/TelegramCore/Sources/ChatHistoryImport.swift
+++ b/submodules/TelegramCore/Sources/ChatHistoryImport.swift
@@ -107,7 +107,7 @@ public enum ChatHistoryImport {
         case chatAdminRequired
     }
     
-    public static func uploadMedia(account: Account, session: Session, file: TempBoxFile, fileName: String, mimeType: String, type: MediaType) -> Signal<Float, UploadMediaError> {
+    public static func uploadMedia(account: Account, session: Session, file: TempBoxFile, disposeFileAfterDone: Bool, fileName: String, mimeType: String, type: MediaType) -> Signal<Float, UploadMediaError> {
         var forceNoBigParts = true
         guard let size = fileSize(file.path), size != 0 else {
             return .single(1.0)
@@ -160,6 +160,11 @@ public enum ChatHistoryImport {
             |> mapToSignal { result -> Signal<Float, UploadMediaError> in
                 return .single(1.0)
             }
+            |> afterDisposed {
+                if disposeFileAfterDone {
+                    TempBox.shared.dispose(file)
+                }
+            }
         }
     }
     
diff --git a/submodules/TelegramUI/Resources/streaming_example/0000.ogg b/submodules/TelegramUI/Resources/streaming_example/0000.ogg
new file mode 100644
index 0000000000..65d91e101c
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0000.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0001.ogg b/submodules/TelegramUI/Resources/streaming_example/0001.ogg
new file mode 100644
index 0000000000..594226ad77
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0001.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0002.ogg b/submodules/TelegramUI/Resources/streaming_example/0002.ogg
new file mode 100644
index 0000000000..9917b25adc
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0002.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0003.ogg b/submodules/TelegramUI/Resources/streaming_example/0003.ogg
new file mode 100644
index 0000000000..d0e91f7e65
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0003.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0004.ogg b/submodules/TelegramUI/Resources/streaming_example/0004.ogg
new file mode 100644
index 0000000000..414edced10
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0004.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0005.ogg b/submodules/TelegramUI/Resources/streaming_example/0005.ogg
new file mode 100644
index 0000000000..48055fe680
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0005.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0006.ogg b/submodules/TelegramUI/Resources/streaming_example/0006.ogg
new file mode 100644
index 0000000000..77aad5e37b
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0006.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0007.ogg b/submodules/TelegramUI/Resources/streaming_example/0007.ogg
new file mode 100644
index 0000000000..8cd3c88932
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0007.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0008.ogg b/submodules/TelegramUI/Resources/streaming_example/0008.ogg
new file mode 100644
index 0000000000..4404af8492
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0008.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0009.ogg b/submodules/TelegramUI/Resources/streaming_example/0009.ogg
new file mode 100644
index 0000000000..84834e27d0
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0009.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0010.ogg b/submodules/TelegramUI/Resources/streaming_example/0010.ogg
new file mode 100644
index 0000000000..e241d38535
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0010.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0011.ogg b/submodules/TelegramUI/Resources/streaming_example/0011.ogg
new file mode 100644
index 0000000000..4656353540
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0011.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0012.ogg b/submodules/TelegramUI/Resources/streaming_example/0012.ogg
new file mode 100644
index 0000000000..b70c325bca
Binary files /dev/null and b/submodules/TelegramUI/Resources/streaming_example/0012.ogg differ
diff --git a/submodules/TelegramUI/Resources/streaming_example/0013.ogg b/submodules/TelegramUI/Resources/streaming_example/0013.ogg
new file mode 100644
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new file mode 100644
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diff --git a/submodules/TelegramUI/Resources/streaming_example/0199.ogg b/submodules/TelegramUI/Resources/streaming_example/0199.ogg
new file mode 100644
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diff --git a/submodules/TelegramVoip/BUILD b/submodules/TelegramVoip/BUILD
index c4b6b81c56..85b01e2045 100644
--- a/submodules/TelegramVoip/BUILD
+++ b/submodules/TelegramVoip/BUILD
@@ -13,8 +13,10 @@ swift_library(
         "//submodules/Postbox:Postbox",
         "//submodules/TelegramUIPreferences:TelegramUIPreferences",
         "//submodules/TgVoip:TgVoip",
-        #"//submodules/TgVoipWebrtcCustom:TgVoipWebrtcCustom",
         "//submodules/TgVoipWebrtc:TgVoipWebrtc",
+        "//submodules/MediaPlayer:UniversalMediaPlayer",
+        "//submodules/AppBundle:AppBundle",
+        "//submodules/OpusBinding:OpusBinding",
     ],
     visibility = [
         "//visibility:public",
diff --git a/submodules/TelegramVoip/Sources/GroupCallContext.swift b/submodules/TelegramVoip/Sources/GroupCallContext.swift
index 5f0d4ddda2..b78d00052e 100644
--- a/submodules/TelegramVoip/Sources/GroupCallContext.swift
+++ b/submodules/TelegramVoip/Sources/GroupCallContext.swift
@@ -1,6 +1,9 @@
 import Foundation
 import SwiftSignalKit
 import TgVoipWebrtc
+import UniversalMediaPlayer
+import AppBundle
+import OpusBinding
 
 private final class ContextQueueImpl: NSObject, OngoingCallThreadLocalContextQueueWebrtc {
     private let queue: Queue
@@ -26,6 +29,79 @@ private final class ContextQueueImpl: NSObject, OngoingCallThreadLocalContextQue
     }
 }
 
+private final class DemoBroadcastPacketSource {
+    private let queue: Queue
+    
+    private let packetsPipe = ValuePipe<[OngoingGroupCallBroadcastPacket]>()
+    var packets: Signal<[OngoingGroupCallBroadcastPacket], NoError> {
+        return self.packetsPipe.signal()
+    }
+    
+    private var timer: SwiftSignalKit.Timer?
+    
+    private var enqueuedPackets: [OngoingGroupCallBroadcastPacket] = []
+    private var delayTimer: SwiftSignalKit.Timer?
+    
+    private var nextIndex: Int = 0
+    
+    init(queue: Queue) {
+        self.queue = queue
+        
+        self.emitPacketAndStartTimer()
+    }
+    
+    deinit {
+        self.timer?.invalidate()
+        self.delayTimer?.invalidate()
+    }
+    
+    private func emitPacketAndStartTimer() {
+        let demoPacketCount = 200
+        let index = self.nextIndex % demoPacketCount
+        self.nextIndex += 1
+        
+        var packets: [OngoingGroupCallBroadcastPacket] = []
+        
+        let fileName = String(format: "%04d", index)
+        if let path = getAppBundle().path(forResource: fileName, ofType: "ogg") {
+            let source = SoftwareAudioSource(path: path)
+            while true {
+                if let frame = source.readFrame() {
+                    packets.append(OngoingGroupCallBroadcastPacket(numSamples: Int32(frame.count / 2), data: frame))
+                } else {
+                    break
+                }
+            }
+        }
+        
+        if !packets.isEmpty {
+            self.enqueuedPackets.append(contentsOf: packets)
+            self.startDelayTimer()
+        }
+        
+        let timer = SwiftSignalKit.Timer(timeout: 1.0, repeat: false, completion: { [weak self] in
+            self?.emitPacketAndStartTimer()
+        }, queue: self.queue)
+        self.timer = timer
+        timer.start()
+    }
+    
+    private func startDelayTimer() {
+        let delayTimer = SwiftSignalKit.Timer(timeout: Double.random(in: 0.1 ... 0.3), repeat: false, completion: { [weak self] in
+            guard let strongSelf = self else {
+                return
+            }
+            let packets = strongSelf.enqueuedPackets
+            strongSelf.enqueuedPackets.removeAll()
+            if !packets.isEmpty {
+                strongSelf.packetsPipe.putNext(packets)
+            }
+        }, queue: self.queue)
+        self.delayTimer = delayTimer
+        delayTimer.start()
+    }
+}
+
 public final class OngoingGroupCallContext {
     public enum NetworkState {
         case connecting
@@ -50,12 +126,14 @@ public final class OngoingGroupCallContext {
         
         let videoSources = ValuePromise<Set<UInt32>>(Set(), ignoreRepeated: true)
         
+        private var broadcastPacketSource: DemoBroadcastPacketSource?
+        private var broadcastPacketsDisposable: Disposable?
+        
         init(queue: Queue, inputDeviceId: String, outputDeviceId: String, video: OngoingCallVideoCapturer?, participantDescriptionsRequired: @escaping (Set<UInt32>) -> Void) {
             self.queue = queue
             
             var networkStateUpdatedImpl: ((GroupCallNetworkState) -> Void)?
             var audioLevelsUpdatedImpl: (([NSNumber]) -> Void)?
-            var participantDescriptionsRequiredImpl: (([NSNumber]) -> Void)?
             
             let videoSources = self.videoSources
             self.context = GroupCallThreadLocalContext(
@@ -125,6 +203,53 @@ public final class OngoingGroupCallContext {
                     strongSelf.joinPayload.set(.single((payload, ssrc)))
                 }
             })
+            
+            let broadcastPacketSource = DemoBroadcastPacketSource(queue: queue)
+            self.broadcastPacketSource = broadcastPacketSource
+            self.broadcastPacketsDisposable = (broadcastPacketSource.packets
+            |> deliverOn(queue)).start(next: { [weak self] packets in
+                guard let strongSelf = self else {
+                    return
+                }
+                strongSelf.context.add(packets)
+            })
+            
+            /*var packets: [OngoingGroupCallBroadcastPacket] = []
+            for i in 0 ..< 200 {
+                let fileName = String(format: "%04d", i)
+                if let path = getAppBundle().path(forResource: fileName, ofType: "ogg") {
+                    if let data = try? Data(contentsOf: URL(fileURLWithPath: path)) {
+                        if let frames = OggOpusReader.extractFrames(data) {
+                            for frame in frames {
+                                packets.append(OngoingGroupCallBroadcastPacket(numSamples: frame.numSamples, data: frame.data))
+                            }
+                        }
+                    }
+                    continue
+                    
+                    let source = SoftwareAudioSource(path: path)
+                    while true {
+                        if let (frame, numSamples) = source.readEncodedFrame() {
+                            if numSamples != 960 {
+                                continue
+                            }
+                            packets.append(OngoingGroupCallBroadcastPacket(numSamples: Int32(numSamples), data: frame))
+                        } else {
+                            break
+                        }
+                        /*if let frame = source.readFrame() {
+                            packets.append(frame)
+                        } else {
+                            break
+                        }*/
+                    }
+                }
+            }
+            context.add(packets);*/
+        }
+        
+        deinit {
+            self.broadcastPacketsDisposable?.dispose()
         }
         
         func setJoinResponse(payload: String, participants: [(UInt32, String?)]) {
diff --git a/submodules/TgVoipWebrtc/PublicHeaders/TgVoipWebrtc/OngoingCallThreadLocalContext.h b/submodules/TgVoipWebrtc/PublicHeaders/TgVoipWebrtc/OngoingCallThreadLocalContext.h
index 4db0db1d26..1b9ec8dd23 100644
--- a/submodules/TgVoipWebrtc/PublicHeaders/TgVoipWebrtc/OngoingCallThreadLocalContext.h
+++ b/submodules/TgVoipWebrtc/PublicHeaders/TgVoipWebrtc/OngoingCallThreadLocalContext.h
@@ -165,6 +165,15 @@ typedef NS_ENUM(int32_t, GroupCallNetworkState) {
 
 @end
 
+@interface OngoingGroupCallBroadcastPacket : NSObject
+
+@property (nonatomic, readonly) int numSamples;
+@property (nonatomic, strong, readonly) NSData * _Nonnull data;
+
+- (instancetype _Nonnull)initWithNumSamples:(int)numSamples data:(NSData * _Nonnull)data;
+
+@end
+
 @interface GroupCallThreadLocalContext : NSObject
 
 - (instancetype _Nonnull)initWithQueue:(id<OngoingCallThreadLocalContextQueueWebrtc> _Nonnull)queue networkStateUpdated:(void (^ _Nonnull)(GroupCallNetworkState))networkStateUpdated audioLevelsUpdated:(void (^ _Nonnull)(NSArray<NSNumber *> * _Nonnull))audioLevelsUpdated inputDeviceId:(NSString * _Nonnull)inputDeviceId outputDeviceId:(NSString * _Nonnull)outputDeviceId videoCapturer:(OngoingCallThreadLocalContextVideoCapturer * _Nullable)videoCapturer incomingVideoSourcesUpdated:(void (^ _Nonnull)(NSArray<NSNumber *> * _Nonnull))incomingVideoSourcesUpdated participantDescriptionsRequired:(void (^ _Nonnull)(NSArray<NSNumber *> * _Nonnull))participantDescriptionsRequired;
@@ -186,6 +195,8 @@ typedef NS_ENUM(int32_t, GroupCallNetworkState) {
 - (void)switchAudioInput:(NSString * _Nonnull)deviceId;
 - (void)makeIncomingVideoViewWithSsrc:(uint32_t)ssrc completion:(void (^_Nonnull)(UIView<OngoingCallThreadLocalContextWebrtcVideoView> * _Nullable))completion;
 
+- (void)addBroadcastPackets:(NSArray<OngoingGroupCallBroadcastPacket *> * _Nonnull)packets;
+
 @end
 
 #endif
diff --git a/submodules/TgVoipWebrtc/Sources/OngoingCallThreadLocalContext.mm b/submodules/TgVoipWebrtc/Sources/OngoingCallThreadLocalContext.mm
index 564fef27db..05d498f598 100644
--- a/submodules/TgVoipWebrtc/Sources/OngoingCallThreadLocalContext.mm
+++ b/submodules/TgVoipWebrtc/Sources/OngoingCallThreadLocalContext.mm
@@ -1398,6 +1398,22 @@ static void processJoinPayload(tgcalls::GroupJoinPayload &payload, void (^ _Nonn
     }
 }
 
+- (void)addBroadcastPackets:(NSArray<OngoingGroupCallBroadcastPacket *> * _Nonnull)packets {
+    if (!_instance) {
+        return;
+    }
+    
+    std::vector<tgcalls::BroadcastPacket> parsedPackets;
+    for (OngoingGroupCallBroadcastPacket *packet in packets) {
+        tgcalls::BroadcastPacket parsedPacket;
+        parsedPacket.numSamples = packet.numSamples;
+        parsedPacket.data.resize(packet.data.length);
+        [packet.data getBytes:parsedPacket.data.data() length:packet.data.length];
+        parsedPackets.push_back(std::move(parsedPacket));
+    }
+    ((tgcalls::GroupInstanceCustomImpl *)(_instance.get()))->addBroadcastPackets(std::move(parsedPackets));
+}
+
 @end
 
 @implementation OngoingGroupCallParticipantDescription
@@ -1412,3 +1428,16 @@ static void processJoinPayload(tgcalls::GroupJoinPayload &payload, void (^ _Nonn
 }
 
 @end
+
+@implementation OngoingGroupCallBroadcastPacket
+
+- (instancetype _Nonnull)initWithNumSamples:(int)numSamples data:(NSData * _Nonnull)data {
+    self = [super init];
+    if (self != nil) {
+        _numSamples = numSamples;
+        _data = data;
+    }
+    return self;
+}
+
+@end
diff --git a/submodules/TgVoipWebrtc/tgcalls b/submodules/TgVoipWebrtc/tgcalls
index d2b15b9edf..35a4725bd3 160000
--- a/submodules/TgVoipWebrtc/tgcalls
+++ b/submodules/TgVoipWebrtc/tgcalls
@@ -1 +1 @@
-Subproject commit d2b15b9edfe2eeaaa9862adb0ae38f8e6308b5fb
+Subproject commit 35a4725bd37e4e0a07eb2d3ba626b80f9dc73fce
diff --git a/third-party/webrtc/webrtc b/third-party/webrtc/webrtc
index e42b463011..1829cfe837 160000
--- a/third-party/webrtc/webrtc
+++ b/third-party/webrtc/webrtc
@@ -1 +1 @@
-Subproject commit e42b4630117498504692fbac80ec6dbb970b2314
+Subproject commit 1829cfe8371d479f254d9783ebe66fc562d30dba