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    18 février 2011, par

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  • bigbluebutton ...

    7 mars 2015, par signo

    Hello i have a BigBlueButton (0.9.0-beta (622)) installation on Debian Wheezy (7.8) all is ok except archiving recordings...

    in the log (/var/log/bigbluebutton/archive-488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.log) i have always same message :

    I, [2015-03-06T11:48:19.320704 #4550]  INFO -- : Archiving events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
W, [2015-03-06T11:48:19.851280 #4550]  WARN -- : Failed to archive events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/events.xml (complete error below...)

    but all directory are writable by right user (tomcat7).

    More Info :

    bbb packages installed

    ii  bbb-apps                              0.9.0-1ubuntu88               amd64        BigBlueButton applications for Red5
    
ii  bbb-apps-deskshare                    0.9.0-1ubuntu25               amd64        BigBlueButton deskshare module for Red5
    
ii  bbb-apps-sip                          0.9.0-1ubuntu19               amd64        BigBlueButton SIP module for Red5
    
ii  bbb-apps-video                        0.9.0-1ubuntu18               amd64        BigBlueButton video module for Red5
    
ii  bbb-client                            0.9.0-1ubuntu235              all          BigBlueButton Flash client
    
ii  bbb-config                            0.9.0-1ubuntu42               all          BigBlueButton configuration
    
rc  bbb-demo                              0.9.0-1ubuntu8                amd64        BigBlueButton API demos
    
ii  bbb-freeswitch                        0.9.0-1ubuntu38               amd64        BigBlueButton build of FreeSWITCH 1.5.x
    
ii  bbb-mkclean                           0.8.7-1                       amd64        tool to clean and optimize Matroska and WebM files
    
ii  bbb-office                            0.9.0-1ubuntu6                amd64        BigBlueButton wrapper for LibreOffice
    
ii  bbb-playback-presentation             0.9.0-1ubuntu11               amd64        BigBluebutton playback of presentation
    
ii  bbb-record-core                       0.9.0-1ubuntu37               amd64        BigBlueButton record and playback
    
ii  bbb-red5                              0.9.0-1ubuntu25               amd64        The Red5 server for bbb
    
ii  bbb-swftools                          0.9.2-1ubuntu14               amd64        The swftools files for bbb
    
ii  bbb-web                               0.9.0-1ubuntu54               all          BigBlueButton API
    
ii  bigbluebutton                         0.9.0-1ubuntu2                amd64        Open source web conferencing platform (bbb)

    bbb-conf —check

    BigBlueButton Server 0.9.0-beta (622)
    
                    Kernel version: 3.16.0-4-amd64(64-bit)
    
                            Memory: 12044 MB
    

    
/var/www/bigbluebutton/client/conf/config.xml (bbb-client)
    
        Port test (tunnel): 2xx.xxx.xxx.xx
    
                              Red5: 2xx.xxx.xxx.xx
    
              useWebrtcIfAvailable: true
    

    
/opt/freeswitch/conf/sip_profiles/external.xml (FreeSWITCH)
    
                    websocket port: 5066
    
                    WebRTC enabled: true
    

    
/etc/nginx/sites-available/bigbluebutton (nginx)
    
                       server name: 2xx.xxx.xxx.xx
    
                              port: 80
    
                    bbb-client dir: /var/www/bigbluebutton
    

    
/var/lib/tomcat7/webapps/bigbluebutton/WEB-INF/classes/bigbluebutton.properties (bbb-web)
    
                      bbb-web host: 2xx.xxx.xxx.xx
    

    
/usr/share/red5/webapps/bigbluebutton/WEB-INF/red5-web.xml (red5)
    
                  voice conference: FreeSWITCH
    
                     capture video: true
    
                   capture desktop: true
    

    
/usr/local/bigbluebutton/core/scripts/bigbluebutton.yml (record and playback)
    
                     playback host: 2xx.xxx.xxx.xx
    

    

    
* Potential problems described below **
    
    # IP does not match:
    
    #                           IP from ifconfig: 172.xx.xxx.xx
    
    #   /etc/nginx/sites-available/bigbluebutton: 2xx.xxx.xxx.xx
    
    # Error: Unable to connect to port 1935 (RTMP) 2xx.xxx.xxx.xx
    

    
    # Error: Unable to connect to port 9123 (desktop sharing) on 212.xxx.xxx.xx

    ls -l /var/freeswitch/meetings/

    -rw-r--r-- 1 freeswitch daemon 5139984 Mar  6 11:44 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675-81976383.wav

    ls -l /usr/share/red5/webapps/video/streams/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/

    -rw-rw-r-- 1 red5 red5 438342 Mar  6 11:44 320x240-cztd6nyzasaz_1-1425642114164.flv

    ls -l /usr/share/red5/webapps/video/streams/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/

    -rw-rw-r-- 1 red5 red5 438342 Mar  6 11:44 320x240-cztd6nyzasaz_1-1425642114164.flv

    cat /usr/share/red5/webapps/video/WEB-INF/red5-web.xml

    <bean class="org.bigbluebutton.app.video.VideoApplication">
    
        <property value="true"></property>
    
        <property ref="redisRecorder"></property>
    
</bean>

    cat /usr/share/red5/webapps/deskshare/WEB-INF/red5-web.xml

     <bean class="org.bigbluebutton.deskshare.server.stream.StreamManager">
    
    
    
    
    
 </bean>

    bbb-record —watch

    Every 2.0s: bbb-record --list20                                                                                                                                   Fri Mar  6 11:53:58 2015
    

    
Internal MeetingID                                               Time                APVD APVDE RAS Slides Processed            Published           External MeetingID
    
------------------------------------------------------  ---------------------------- ---- ----- --- ------ -------------------- ------------------  -------------------
    
57d9849193299cebe9409d1c98d175958331d34a-1425642748807  Fri 6 Mar 11:52:28 GMT 2015   X                  5
    
488052dc7c095c74bf8992ec51a66298db04b765-1425642166675  Fri 6 Mar 11:42:46 GMT 2015  XXX         X       6

    bbb-record —debug

    E, [2015-03-06T11:48:20.335578 #4548] ERROR -- : Sanity check failed on 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675

    cat /var/log/bigbluebutton/archive-488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.log

    # Logfile created on 2015-03-06 11:48:19 +0000 by logger.rb/31641
    
I, [2015-03-06T11:48:19.320704 #4550]  INFO -- : Archiving events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
W, [2015-03-06T11:48:19.851280 #4550]  WARN -- : Failed to archive events for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/events.xml
    
I, [2015-03-06T11:48:19.851428 #4550]  INFO -- : Fetching the recording marks for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
I, [2015-03-06T11:48:19.851501 #4550]  INFO -- : Getting record status events
    
W, [2015-03-06T11:48:19.851585 #4550]  WARN -- : Failed to fetch the recording marks for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/events.xml
    
I, [2015-03-06T11:48:19.851645 #4550]  INFO -- : Archiving audio /var/freeswitch/meetings/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675*.wav.
    
W, [2015-03-06T11:48:19.851920 #4550]  WARN -- : Failed to archive audio for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/audio
    
I, [2015-03-06T11:48:19.851981 #4550]  INFO -- : Archiving presentation for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
W, [2015-03-06T11:48:19.852257 #4550]  WARN -- : Failed to archive presentations for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/presentation
    
I, [2015-03-06T11:48:19.852322 #4550]  INFO -- : Archiving deskshare for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
W, [2015-03-06T11:48:19.852561 #4550]  WARN -- : Failed to archive deskshare for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/deskshare
    
I, [2015-03-06T11:48:19.852620 #4550]  INFO -- : Archiving video for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675.
    
W, [2015-03-06T11:48:19.852834 #4550]  WARN -- : Failed to archive video for 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675. Permission denied - /var/bigbluebutton/recording/raw/488052dc7c095c74bf8992ec51a66298db04b765-1425642166675/video

    all folder under /var/bigbluebutton/ have same rights (drwxrwxrwx tomcat7 tomcat7)

    ls -l /var/bigbluebutton/

    total 40
    
drwxr-xr-x 3 tomcat7 tomcat7 4096 Mar  6 11:42 488052dc7c095c74bf8992ec51a66298db04b765-1425642166675
    
drwxr-xr-x 3 tomcat7 tomcat7 4096 Mar  6 11:52 57d9849193299cebe9409d1c98d175958331d34a-1425642748807
    
drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:52 blank
    
drwxrwxrwx 2 tomcat7 tomcat7 4096 Feb 17 17:17 configs
    
drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:57 deskshare
    
drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:57 meetings
    
drwxrwxrwx 3 tomcat7 tomcat7 4096 Mar  3 15:52 playback
    
drwxrwxrwx 3 tomcat7 tomcat7 4096 Mar  3 15:57 published
    
drwxrwxrwx 6 tomcat7 tomcat7 4096 Mar  3 15:57 recording
    
drwxrwxrwx 2 tomcat7 tomcat7 4096 Mar  3 15:57 unpublished

  • Two Tux, one SoC

    2 mars 2015, par Mans — Hardware, MIPS

    The Sigma Designs SMP86xx chips contain, as discussed elsewhere, multiple CPU cores. In addition to the main CPU (a MIPS 74Kf or 24Kf), there are two MIPS 4KEc cores intended for real-time and security processing. These cores are equipped with full MMUs, and are thus perfectly capable of running a … Continue reading →

  • Muxing Android MediaCodec encoded H264 packets into RTMP

    31 décembre 2015, par Vadym

    I am coming from a thread Encoding H.264 from camera with Android MediaCodec. My setup is very similar. However, I attempt to write mux the encoded frames and with javacv and broadcast them via rtmp.

    RtmpClient.java

    ...
    
private volatile BlockingQueue mFrameQueue = new LinkedBlockingQueue(MAXIMUM_VIDEO_FRAME_BACKLOG);
    
...
    
private void startStream() throws FrameRecorder.Exception, IOException {
    
    if (TextUtils.isEmpty(mDestination)) {
    
        throw new IllegalStateException("Cannot start RtmpClient without destination");
    
    }
    

    
    if (mCamera == null) {
    
        throw new IllegalStateException("Cannot start RtmpClient without camera.");
    
    }
    

    
    Camera.Parameters cameraParams = mCamera.getParameters();
    

    
    mRecorder = new FFmpegFrameRecorder(
    
            mDestination,
    
            mVideoQuality.resX,
    
            mVideoQuality.resY,
    
            (mAudioQuality.channelType.equals(AudioQuality.CHANNEL_TYPE_STEREO) ? 2 : 1));
    

    
    mRecorder.setFormat("flv");
    

    
    mRecorder.setFrameRate(mVideoQuality.frameRate);
    
    mRecorder.setVideoBitrate(mVideoQuality.bitRate);
    
    mRecorder.setVideoCodec(avcodec.AV_CODEC_ID_H264);
    

    
    mRecorder.setSampleRate(mAudioQuality.samplingRate);
    
    mRecorder.setAudioBitrate(mAudioQuality.bitRate);
    
    mRecorder.setAudioCodec(avcodec.AV_CODEC_ID_AAC);
    

    
    mVideoStream = new VideoStream(mRecorder, mVideoQuality, mFrameQueue, mCamera);
    
    mAudioStream = new AudioStream(mRecorder, mAudioQuality);
    

    
    mRecorder.start();
    

    
    // Setup a bufferred preview callback
    
    setupCameraCallback(mCamera, mRtmpClient, DEFAULT_PREVIEW_CALLBACK_BUFFERS,
    
            mVideoQuality.resX * mVideoQuality.resY * ImageFormat.getBitsPerPixel(
    
                    cameraParams.getPreviewFormat())/8);
    

    
    try {
    
        mVideoStream.start();
    
        mAudioStream.start();
    
    }
    
    catch(Exception e) {
    
        e.printStackTrace();
    
        stopStream();
    
    }
    
}
    
...
    
@Override
    
public void onPreviewFrame(byte[] data, Camera camera) {
    
    boolean frameQueued = false;
    

    
    if (mRecorder == null || data == null) {
    
        return;
    
    }
    

    
    frameQueued = mFrameQueue.offer(data);
    

    
    // return the buffer to be reused - done in videostream
    
    //camera.addCallbackBuffer(data);
    
}
    
...

    VideoStream.java

    ...
    
@Override
    
public void run() {
    
    try {
    
        mMediaCodec = MediaCodec.createEncoderByType("video/avc");
    
        MediaFormat mediaFormat = MediaFormat.createVideoFormat("video/avc", mVideoQuality.resX, mVideoQuality.resY);
    
        mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, mVideoQuality.bitRate);
    
        mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, mVideoQuality.frameRate);
    
        mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar);
    
        mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 1);
    
        mMediaCodec.configure(mediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
    
        mMediaCodec.start();
    
    }
    
    catch(IOException e) {
    
        e.printStackTrace();
    
    }
    

    
    long startTimestamp = System.currentTimeMillis();
    
    long frameTimestamp = 0;
    
    byte[] rawFrame = null;
    

    
    try {
    
        while (!Thread.interrupted()) {
    
            rawFrame = mFrameQueue.take();
    

    
            frameTimestamp = 1000 * (System.currentTimeMillis() - startTimestamp);
    

    
            encodeFrame(rawFrame, frameTimestamp);
    

    
            // return the buffer to be reused
    
            mCamera.addCallbackBuffer(rawFrame);
    
        }
    
    }
    
    catch (InterruptedException ignore) {
    
        // ignore interrup while waiting
    
    }
    

    
    // Clean up video stream allocations
    
    try {
    
        mMediaCodec.stop();
    
        mMediaCodec.release();
    
        mOutputStream.flush();
    
        mOutputStream.close();
    
    } catch (Exception e){
    
        e.printStackTrace();
    
    }
    
}
    
...
    
private void encodeFrame(byte[] input, long timestamp) {
    
    try {
    
        ByteBuffer[] inputBuffers = mMediaCodec.getInputBuffers();
    
        ByteBuffer[] outputBuffers = mMediaCodec.getOutputBuffers();
    

    
        int inputBufferIndex = mMediaCodec.dequeueInputBuffer(0);
    

    
        if (inputBufferIndex >= 0) {
    
            ByteBuffer inputBuffer = inputBuffers[inputBufferIndex];
    
            inputBuffer.clear();
    
            inputBuffer.put(input);
    
            mMediaCodec.queueInputBuffer(inputBufferIndex, 0, input.length, timestamp, 0);
    
        }
    

    
        MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();
    

    
        int outputBufferIndex = mMediaCodec.dequeueOutputBuffer(bufferInfo, 0);
    

    
        if (outputBufferIndex >= 0) {
    
            while (outputBufferIndex >= 0) {
    
                ByteBuffer outputBuffer = outputBuffers[outputBufferIndex];
    

    
                // Should this be a direct byte buffer?
    
                byte[] outData = new byte[bufferInfo.size - bufferInfo.offset];
    
                outputBuffer.get(outData);
    

    
                mFrameRecorder.record(outData, bufferInfo.offset, outData.length, timestamp);
    

    
                mMediaCodec.releaseOutputBuffer(outputBufferIndex, false);
    
                outputBufferIndex = mMediaCodec.dequeueOutputBuffer(bufferInfo, 0);
    
            }
    
        }
    
        else if (outputBufferIndex == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
    
            outputBuffers = mMediaCodec.getOutputBuffers();
    
        } else if (outputBufferIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
    
            // ignore for now
    
        }
    
    } catch (Throwable t) {
    
        t.printStackTrace();
    
    }
    

    
}
    
...

    FFmpegFrameRecorder.java

    ...
    
// Hackish codec copy frame recording function
    
public boolean record(byte[] encodedData, int offset, int length, long frameCount) throws Exception {
    
    int ret;
    

    
    if (encodedData == null) {
    
        return false;
    
    }
    

    
    av_init_packet(video_pkt);
    

    
    // this is why i wondered whether I should get outputbuffer data into direct byte buffer
    
    video_outbuf.put(encodedData, 0, encodedData.length);
    

    
    video_pkt.data(video_outbuf);
    
    video_pkt.size(video_outbuf_size);
    

    
    video_pkt.pts(frameCount);
    
    video_pkt.dts(frameCount);
    

    
    video_pkt.stream_index(video_st.index());
    

    
    synchronized (oc) {
    
        /* write the compressed frame in the media file */
    
        if (interleaved &amp;&amp; audio_st != null) {
    
            if ((ret = av_interleaved_write_frame(oc, video_pkt)) &lt; 0) {
    
                throw new Exception("av_interleaved_write_frame() error " + ret + " while writing interleaved video frame.");
    
            }
    
        } else {
    
            if ((ret = av_write_frame(oc, video_pkt)) &lt; 0) {
    
                throw new Exception("av_write_frame() error " + ret + " while writing video frame.");
    
            }
    
        }
    
    }
    
    return (video_pkt.flags() &amp; AV_PKT_FLAG_KEY) == 1;
    
}
    
...

    When I try to stream the video and run ffprobe on it, I get the following output :

    ffprobe version 2.5.3 Copyright (c) 2007-2015 the FFmpeg developers
    
  built on Jan 19 2015 12:56:57 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-55)
    
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-buffer-size=4 -m64 -mtune=generic' --enable-bzlib --disable-crystalhd --enable-libass --enable-libdc1394 --enable-libfaac --enable-nonfree --disable-indev=jack --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-openal --enable-libopencv --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-x11grab --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --enable-libcaca --shlibdir=/usr/lib64 --enable-runtime-cpudetect
    
  libavutil      54. 15.100 / 54. 15.100
    
  libavcodec     56. 13.100 / 56. 13.100
    
  libavformat    56. 15.102 / 56. 15.102
    
  libavdevice    56.  3.100 / 56.  3.100
    
  libavfilter     5.  2.103 /  5.  2.103
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Metadata:
    
  Server                NGINX RTMP (github.com/arut/nginx-rtmp-module)
    
  width                 320.00
    
  height                240.00
    
  displayWidth          320.00
    
  displayHeight         240.00
    
  duration              0.00
    
  framerate             0.00
    
  fps                   0.00
    
  videodatarate         261.00
    
  videocodecid          7.00
    
  audiodatarate         62.00
    
  audiocodecid          10.00
    
  profile
    
  level
    
[live_flv @ 0x1edb0820] Could not find codec parameters for stream 0 (Video: none, none, 267 kb/s): unknown codec
    
Consider increasing the value for the 'analyzeduration' and 'probesize' options
    
Input #0, live_flv, from 'rtmp://<server>/input/<stream>':
    
  Metadata:
    
    Server          : NGINX RTMP (github.com/arut/nginx-rtmp-module)
    
    displayWidth    : 320
    
    displayHeight   : 240
    
    fps             : 0
    
    profile         :
    
    level           :
    
  Duration: 00:00:00.00, start: 16.768000, bitrate: N/A
    
    Stream #0:0: Video: none, none, 267 kb/s, 1k tbr, 1k tbn, 1k tbc
    
    Stream #0:1: Audio: aac (LC), 16000 Hz, mono, fltp, 63 kb/s
    
Unsupported codec with id 0 for input stream 0
    
</stream></server>

    I am not, by any means, an expert in H264 or video encoding. I know that the encoded frames that come out from MediaCodec contain SPS NAL, PPS NAL, and frame NAL units. I’ve also written the MediaCodec output into a file and was able to play it back (I did have to specify the format and framerate as otherwise it would play too fast).

    My assumption is that things should work (see how little I know :)). Knowing that SPS and PPS are written out, decoder should know enough. Yet, ffprobe fails to recognize codec, fps, and other video information. Do I need to pass packet flag information to FFmpegFrameRecorder.java:record() function ? Or should I use direct buffer ? Any suggestion will be appreciated ! I should figure things out with a hint.

    PS : I know that some codecs use Planar and other SemiPlanar color formats. That distinction will come later if I get past this. Also, I didn’t go the Surface to MediaCodec way because I need to support API 17 and it requires more changes than this route, which I think helps me understand the more basic flow. Agan, I appreciate any suggestions. Please let me know if something needs to be clarified.

    Update #1

    So having done more testing, I see that my encoder outputs the following frames :

    000000016742800DDA0507E806D0A1350000000168CE06E2
    
0000000165B840A6F1E7F0EA24000AE73BEB5F51CC7000233A84240...
    
0000000141E2031364E387FD4F9BB3D67F51CC7000279B9F9CFE811...
    
0000000141E40304423FFFFF0B7867F89FAFFFFFFFFFFCBE8EF25E6...
    
0000000141E602899A3512EF8AEAD1379F0650CC3F905131504F839...
    
...

    The very first frame contains SPS and PPS. From what I was able to see, these are transmitted only once. The rest are NAL types 1 and 5. So, my assumption is that, for ffprobe to see stream info not only when the stream starts, I should capture SPS and PPS frames and re-transmit them myself periodically, after a certain number of frames, or perhaps before every I-frame. What do you think ?

    Update #2

    Unable to validate that I’m writing frames successfully. After having tried to read back the written packet, I cannot validate written bytes. As strange, on successful write of IPL image and streaming, I also cannot print out bytes of encoded packet after avcodec_encode_video2. Hit the official dead end.

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