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  • Android YouTube Live v3 rtmp streaming via ffmpeg won't show preview

    14 décembre 2017, par Ariel Yust

    Hi everyone I’m breaking my head over this issue here,
    I’m developing an Android App for streaming content from the user’s device camera (back/front) to a live streaming on YouTube.

    Problem :
    YouTube Live shows "The health is good." in (Live Streaming->Events) but there’s nothing showing in the preview... in fact when I press play it tells me "An error has occurred, please try again later".

    Why is this happening ? what could be the problem ?

    What I’m doing :
    using google’s Oauth 2.0 and google api for login.
    YouTube V3 data api’s for creating a new broadcast and stream or use an opened stream - I’m using RTMP.

    I’m opening Camera Api1 and capturing the video into a SurfaceTexture, then I encode images and audio (MIC) using Android’s MediaCodec, save a 3+- seconds *.mp4 file locally and then once the muxer is done I stream the file with ffpmeg.

    String[] cmd = {
    
            "-i", filePath, //local file path (video is playable with vlc)
    
            "-strict", "experimental",
    
            "-acodec", "aac",
    
            "-ac", "1",
    
            "-ar", "44100",
    
            "-vcodec", "libx264",
    
            "-pix_fmt", "yuv420p",
    
            "-r", "30",
    
            "-g", "60",
    
            "-vb", "512k",
    
            "-profile:v", "main",
    
            "-preset", "medium",
    
            "-f", "flv",
    
            "-s", "1280x720",
    
            CreateBroadcast.rtmpUrl
    
        };
    

    
ffmpeg.execute(cmd, responseHandler); //responseHandler notify me to send next file
    

    
//how I set a new rtmpUrl, in CreateBroadcast.java
    
rtmpUrl = 
    
    returnedStream.getCdn().getIngestionInfo().getIngestionAddress() +
    
    File.separator + 
    
    returnedStream.getCdn().getIngestionInfo().getStreamName();

    next file

    Using this ffmpeg library.

    ffmpeg process log :

    10:40:08.967 7..8/c.k.r D/Send: ffmpeg version n3.0.1 Copyright (c) 2000-2016 the FFmpeg developers, built with gcc 4.8 (GCC)
    
10:40:08.968 7..8/c.k.r D/Send: configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
    
10:40:08.969 7..8/c.k.r D/Send: onProgress ->   libavutil      55. 17.103 / 55. 17.103
    
10:40:08.969 7..8/c.k.r D/Send: onProgress ->   libavcodec     57. 24.102 / 57. 24.102
    
10:40:08.969 7..8/c.k.r D/Send: onProgress ->   libavformat    57. 25.100 / 57. 25.100
    
10:40:08.970 7..8/c.k.r D/Send: onProgress ->   libavdevice    57.  0.101 / 57.  0.101
    
10:40:08.970 7..8/c.k.r D/Send: onProgress ->   libavfilter     6. 31.100 /  6. 31.100
    
10:40:08.971 7..8/c.k.r D/Send: onProgress ->   libswscale      4.  0.100 /  4.  0.100
    
10:40:08.971 7..8/c.k.r D/Send: onProgress ->   libswresample   2.  0.101 /  2.  0.101
    
10:40:08.971 7..8/c.k.r D/Send: onProgress ->   libpostproc    54.  0.100 / 54.  0.100
    
10:40:09.202 7..8/c.k.r D/Send: onProgress -> Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Movies/realPoll_0.mp4':
    
10:40:09.203 7..8/c.k.r D/Send: onProgress ->   Metadata:
    
10:40:09.203 7..8/c.k.r D/Send: onProgress ->     major_brand     : mp42
    
10:40:09.204 7..8/c.k.r D/Send: onProgress ->     minor_version   : 0
    
10:40:09.204 7..8/c.k.r D/Send: onProgress ->     compatible_brands: isommp42
    
10:40:09.204 7..8/c.k.r D/Send: onProgress ->     creation_time   : 2017-08:40:08
    
10:40:09.205 7..8/c.k.r D/Send: onProgress ->     com.android.version: 6.0.1
    
10:40:09.205 7..8/c.k.r D/Send: onProgress ->   Duration: 00:00:02.79, start: 0.000000, bitrate: 4080 kb/s
    
10:40:09.206 7..8/c.k.r D/Send: onProgress ->     Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 4166 kb/s, SAR 1:1 DAR 16:9, 30.60 fps, 90k tbr, 90k tbn, 180k tbc (default)
    
10:40:09.206 7..8/c.k.r D/Send: onProgress ->     Metadata:
    
10:40:09.207 7..8/c.k.r D/Send: onProgress ->       creation_time   : 2017-08:40:08
    
10:40:09.207 7..8/c.k.r D/Send: onProgress ->       handler_name    : VideoHandle
    
10:40:09.208 7..8/c.k.r D/Send: onProgress ->     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 59 kb/s (default)
    
10:40:09.208 7..8/c.k.r D/Send: onProgress ->     Metadata:
    
10:40:09.209 7..8/c.k.r D/Send: onProgress ->       creation_time   : 2017-08:40:08
    
10:40:09.209 7..8/c.k.r D/Send: onProgress ->       handler_name    : SoundHandle
    
10:40:10.312 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] using SAR=1/1
    
10:40:10.324 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] using cpu capabilities: none!
    
10:40:10.457 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] profile Main, level 3.1
    
10:40:10.458 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=60 keyint_min=6 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=512 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
10:40:10.494 7..8/c.k.r D/Send: onProgress -> Output #0, flv, to 'rtmp://a.rtmp.youtube.com/live2/b2mb-vjew-2205-8w39':
    
10:40:10.495 7..8/c.k.r D/Send: onProgress ->   Metadata:
    
10:40:10.496 7..8/c.k.r D/Send: onProgress ->     major_brand     : mp42
    
10:40:10.499 7..8/c.k.r D/Send: onProgress ->     minor_version   : 0
    
10:40:10.500 7..8/c.k.r D/Send: onProgress ->     compatible_brands: isommp42
    
10:40:10.502 7..8/c.k.r D/Send: onProgress ->     com.android.version: 6.0.1
    
10:40:10.504 7..8/c.k.r D/Send: onProgress ->     encoder         : Lavf57.25.100
    
10:40:10.505 7..8/c.k.r D/Send: onProgress ->     Stream #0:0(eng): Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 512 kb/s, 30 fps, 1k tbn, 30 tbc (default)
    
10:40:10.507 7..8/c.k.r D/Send: onProgress ->     Metadata:
    
10:40:10.509 7..8/c.k.r D/Send: onProgress ->       creation_time   : 2017-08:40:08
    
10:40:10.510 7..8/c.k.r D/Send: onProgress ->       handler_name    : VideoHandle
    
10:40:10.511 7..8/c.k.r D/Send: onProgress ->       encoder         : Lavc57.24.102 libx264
    
10:40:10.512 7..8/c.k.r D/Send: onProgress ->     Side data:
    
10:40:10.512 7..8/c.k.r D/Send: onProgress ->       unknown side data type 10 (24 bytes)
    
10:40:10.514 7..8/c.k.r D/Send: onProgress ->     Stream #0:1(eng): Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, mono, fltp, 69 kb/s (default)
    
10:40:10.521 7..8/c.k.r D/Send: onProgress ->     Metadata:
    
10:40:10.522 7..8/c.k.r D/Send: onProgress ->       creation_time   : 2017-08:40:08
    
10:40:10.522 7..8/c.k.r D/Send: onProgress ->       handler_name    : SoundHandle
    
10:40:10.522 7..8/c.k.r D/Send: onProgress ->       encoder         : Lavc57.24.102 aac
    
10:40:10.523 7..8/c.k.r D/Send: onProgress -> Stream mapping:
    
10:40:10.523 7..8/c.k.r D/Send: onProgress ->   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
10:40:10.524 7..8/c.k.r D/Send: onProgress ->   Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
10:40:10.524 7..8/c.k.r D/Send: onProgress -> Press [q] to stop, [?] for help
    
10:40:11.017 7..8/c.k.r D/Send: onProgress -> frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.92 bitrate=   4.3kbits/s speed=1.82x    
    
10:40:11.300 7..8/c.k.r D/Send: onProgress -> Past duration 0.912331 too large
    
10:40:11.342 7..8/c.k.r D/Send: onProgress -> Past duration 0.874321 too large
    
10:40:11.376 7..8/c.k.r D/Send: onProgress -> Past duration 0.903664 too large
    
10:40:11.411 7..8/c.k.r D/Send: onProgress -> Past duration 0.884666 too large
    
10:40:11.545 7..8/c.k.r D/Send: onProgress -> frame=   12 fps= 12 q=0.0 size=       0kB time=00:00:01.03 bitrate=   3.9kbits/s dup=0 drop=2 speed=   1x    
    
10:40:12.105 7..8/c.k.r D/Send: onProgress -> frame=   25 fps= 16 q=0.0 size=       0kB time=00:00:01.03 bitrate=   3.9kbits/s dup=0 drop=2 speed=0.667x    
    
                                                                       [ 10:40:12.379   191:  191 E/         ]
    
                                                                       invalid crash request of size 4 (from pid=7244 uid=0)
    
10:40:12.598 7..8/c.k.r D/Send: onProgress -> frame=   32 fps= 15 q=0.0 size=       0kB time=00:00:02.02 bitrate=   2.0kbits/s dup=0 drop=2 speed=0.98x    
    
10:40:12.598 7..8/c.k.r D/Send: onProgress -> Past duration 0.792656 too large
    
10:40:12.675 7..8/c.k.r D/Send: onProgress -> Past duration 0.710991 too large
    
10:40:12.708 7..8/c.k.r D/Send: onProgress -> Past duration 0.688332 too large
    
10:40:12.725 7..8/c.k.r D/Send: onProgress -> Past duration 0.710655 too large
    
10:40:12.760 7..8/c.k.r D/Send: onProgress -> Past duration 0.716331 too large
    
10:40:12.775 7..8/c.k.r D/Send: onProgress -> Past duration 0.713661 too large
    
10:40:12.791 7..8/c.k.r D/Send: onProgress -> Past duration 0.688332 too large
    
10:40:12.825 7..8/c.k.r D/Send: onProgress -> Past duration 0.633659 too large
    
10:40:12.857 7..8/c.k.r D/Send: onProgress -> Past duration 0.661324 too large
    
10:40:12.876 7..8/c.k.r D/Send: onProgress -> Past duration 0.670998 too large
    
10:40:12.942 7..8/c.k.r D/Send: onProgress -> Past duration 0.640327 too large
    
10:40:17.761 7..8/c.k.r D/Send: onProgress -> frame=   47 fps=6.7 q=0.0 size=       0kB time=00:00:02.02 bitrate=   2.0kbits/s dup=0 drop=2 speed=0.288x    
    
10:40:17.929 7..8/c.k.r D/Send: onProgress -> Past duration 0.605324 too large
    
10:40:17.997 7..8/c.k.r D/Send: onProgress -> Past duration 0.614998 too large
    
10:40:18.520 7..8/c.k.r D/Send: onProgress -> frame=   51 fps=6.6 q=42.0 size=       4kB time=00:00:02.02 bitrate=  17.0kbits/s dup=0 drop=2 speed=0.263x    
    
10:40:18.520 7..8/c.k.r D/Send: onProgress -> Past duration 0.605995 too large
    
10:40:19.607 7..8/c.k.r D/Send: onProgress -> Past duration 0.608986 too large
    
10:40:19.843 7..8/c.k.r D/Send: onProgress -> frame=   53 fps=5.8 q=42.0 size=       9kB time=00:00:02.02 bitrate=  34.8kbits/s dup=0 drop=2 speed=0.223x    
    
10:40:20.365 7..8/c.k.r D/Send: onProgress -> Past duration 0.614326 too large
    
10:40:20.710 7..8/c.k.r D/Send: onProgress -> frame=   56 fps=5.7 q=41.0 size=      16kB time=00:00:02.02 bitrate=  66.2kbits/s dup=0 drop=2 speed=0.206x    
    
10:40:21.348 7..8/c.k.r D/Send: onProgress -> frame=   58 fps=5.5 q=41.0 size=      20kB time=00:00:02.02 bitrate=  82.1kbits/s dup=0 drop=2 speed=0.193x    
    
10:40:22.419 7..8/c.k.r D/Send: onProgress -> frame=   61 fps=5.2 q=41.0 size=      27kB time=00:00:02.02 bitrate= 108.3kbits/s dup=0 drop=2 speed=0.173x    
    
10:40:23.232 7..8/c.k.r D/Send: onProgress -> frame=   64 fps=5.1 q=41.0 size=      33kB time=00:00:02.02 bitrate= 133.1kbits/s dup=0 drop=2 speed=0.161x    
    
10:40:24.659 7..8/c.k.r D/Send: onProgress -> frame=   67 fps=4.8 q=40.0 size=      38kB time=00:00:02.02 bitrate= 154.5kbits/s dup=0 drop=2 speed=0.145x    
    
10:40:25.591 7..8/c.k.r D/Send: onProgress -> frame=   69 fps=4.7 q=40.0 size=      42kB time=00:00:02.02 bitrate= 169.5kbits/s dup=0 drop=2 speed=0.138x    
    
10:40:26.137 7..8/c.k.r D/Send: onProgress -> frame=   71 fps=4.6 q=39.0 size=      45kB time=00:00:02.02 bitrate= 183.6kbits/s dup=0 drop=2 speed=0.132x    
    
10:40:26.913 7..8/c.k.r D/Send: onProgress -> frame=   73 fps=4.5 q=39.0 size=      46kB time=00:00:02.02 bitrate= 187.6kbits/s dup=0 drop=2 speed=0.125x    
    
10:40:27.234 7..8/c.k.r D/Send: onProgress -> frame=   76 fps=4.5 q=38.0 size=      49kB time=00:00:02.48 bitrate= 162.7kbits/s dup=0 drop=2 speed=0.149x    
    
10:40:27.295 7..8/c.k.r D/Send: onProgress -> Past duration 0.686333 too large
    
10:40:27.801 7..8/c.k.r D/Send: onProgress -> Past duration 0.840324 too large
    
10:40:28.269 7..8/c.k.r D/Send: onProgress -> frame=   78 fps=4.5 q=37.0 size=      53kB time=00:00:02.54 bitrate= 171.5kbits/s dup=0 drop=2 speed=0.147x    
    
10:40:28.269 7..8/c.k.r D/Send: onProgress -> Past duration 0.739662 too large
    
10:40:28.336 7..8/c.k.r D/Send: onProgress -> Past duration 0.671333 too large
    
10:40:28.373 7..8/c.k.r D/Send: onProgress -> frame=   80 fps=4.5 q=37.0 size=      59kB time=00:00:02.54 bitrate= 188.7kbits/s dup=0 drop=2 speed=0.143x    
    
10:40:41.320 7..8/c.k.r D/Send: onProgress -> [flv @ 0xb5ba9600] Failed to update header with correct duration.
    
10:40:41.321 7..8/c.k.r D/Send: onProgress -> [flv @ 0xb5ba9600] Failed to update header with correct filesize.
    
10:40:41.321 7..8/c.k.r D/Send: onProgress -> frame=   80 fps=2.6 q=-1.0 Lsize=     155kB time=00:00:02.70 bitrate= 468.9kbits/s dup=0 drop=2 speed=0.0877x    
    
10:40:41.322 7..8/c.k.r D/Send: onProgress -> video:128kB audio:23kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.617489%
    
10:40:41.332 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] frame I:2     Avg QP:28.63  size:  3516
    
10:40:41.333 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] frame P:62    Avg QP:28.45  size:  1878
    
10:40:41.333 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] frame B:16    Avg QP:29.68  size:   400
    
10:40:41.334 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] consecutive B-frames: 71.2%  5.0%  3.8% 20.0%
    
10:40:41.334 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] mb I  I16..4: 98.8%  0.0%  1.2%
    
10:40:41.334 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] mb P  I16..4: 17.8%  0.0%  0.1%  P16..4: 17.0%  0.2%  0.7%  0.0%  0.0%    skip:64.2%
    
10:40:41.335 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] mb B  I16..4:  0.1%  0.0%  0.0%  B16..8: 11.9%  0.0%  0.0%  direct: 1.0%  skip:87.0%  L0:16.0% L1:84.0% BI: 0.0%
    
10:40:41.335 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] final ratefactor: 30.20
    
10:40:41.336 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] coded y,uvDC,uvAC intra: 1.4% 20.4% 0.0% inter: 0.4% 14.0% 0.0%
    
10:40:41.338 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] i16 v,h,dc,p: 66% 22%  7%  4%
    
10:40:41.339 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu:  7% 19% 53%  4%  4%  3%  5%  2%  2%
    
10:40:41.339 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] i8c dc,h,v,p: 71% 16% 12%  0%
    
10:40:41.340 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] Weighted P-Frames: Y:6.5% UV:6.5%
    
10:40:41.340 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] ref P L0: 85.6%  4.5%  7.7%  2.2%  0.0%
    
10:40:41.341 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] ref B L0: 99.3%  0.7%
    
10:40:41.341 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] ref B L1: 97.0%  3.0%
    
10:40:41.342 7..8/c.k.r D/Send: onProgress -> [libx264 @ 0xb5b84800] kb/s:384.88
    
10:40:41.421 7..8/c.k.r D/Send: onProgress -> [aac @ 0xb5b85000] Qavg: 1561.786
    
10:40:41.423 7..8/c.k.r D/Send: onSuccess -> configuration: --target-os=linux --cross-prefix=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/bin/arm-linux-androideabi- --arch=arm --cpu=cortex-a8 --enable-runtime-cpudetect --sysroot=/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/sysroot --enable-pic --enable-libx264 --enable-libass --enable-libfreetype --enable-libfribidi --enable-libmp3lame --enable-fontconfig --enable-pthreads --disable-debug --disable-ffserver --enable-version3 --enable-hardcoded-tables --disable-ffplay --disable-ffprobe --enable-gpl --enable-yasm --disable-doc --disable-shared --enable-static --pkg-config=/home/vagrant/SourceCode/ffmpeg-android/ffmpeg-pkg-config --prefix=/home/vagrant/SourceCode/ffmpeg-android/build/armeabi-v7a --extra-cflags='-I/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/include -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -fno-strict-overflow -fstack-protector-all' --extra-ldflags='-L/home/vagrant/SourceCode/ffmpeg-android/toolchain-android/lib -Wl,-z,relro -Wl,-z,now -pie' --extra-libs='-lpng -lexpat -lm' --extra-cxxflags=
    
10:40:41.423 7..8/c.k.r D/Send:   libavutil      55. 17.103 / 55. 17.103
    
10:40:41.423 7..8/c.k.r D/Send:   libavcodec     57. 24.102 / 57. 24.102
    
10:40:41.423 7..8/c.k.r D/Send:   libavformat    57. 25.100 / 57. 25.100
    
10:40:41.423 7..8/c.k.r D/Send:   libavdevice    57.  0.101 / 57.  0.101
    
10:40:41.424 7..8/c.k.r D/Send:   libavfilter     6. 31.100 /  6. 31.100
    
10:40:41.424 7..8/c.k.r D/Send:   libswscale      4.  0.100 /  4.  0.100
    
10:40:41.424 7..8/c.k.r D/Send:   libswresample   2.  0.101 /  2.  0.101
    
10:40:41.424 7..8/c.k.r D/Send:   libpostproc    54.  0.100 / 54.  0.100
    
10:40:41.424 7..8/c.k.r D/Send: Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/storage/emulated/0/Movies/realPoll_0.mp4':
    
10:40:41.424 7..8/c.k.r D/Send:   Metadata:
    
10:40:41.424 7..8/c.k.r D/Send:     major_brand     : mp42
    
10:40:41.424 7..8/c.k.r D/Send:     minor_version   : 0
    
10:40:41.424 7..8/c.k.r D/Send:     compatible_brands: isommp42
    
10:40:41.424 7..8/c.k.r D/Send:     creation_time   : 2017-08:40:08
    
10:40:41.424 7..8/c.k.r D/Send:     com.android.version: 6.0.1
    
10:40:41.424 7..8/c.k.r D/Send:   Duration: 00:00:02.79, start: 0.000000, bitrate: 4080 kb/s
    
10:40:41.424 7..8/c.k.r D/Send:     Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 4166 kb/s, SAR 1:1 DAR 16:9, 30.60 fps, 90k tbr, 90k tbn, 180k tbc (default)
    
10:40:41.424 7..8/c.k.r D/Send:     Metadata:
    
10:40:41.424 7..8/c.k.r D/Send:       creation_time   : 2017-08:40:08
    
10:40:41.424 7..8/c.k.r D/Send:       handler_name    : VideoHandle
    
10:40:41.424 7..8/c.k.r D/Send:     Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 59 kb/s (default)
    
10:40:41.424 7..8/c.k.r D/Send:     Metadata:
    
10:40:41.424 7..8/c.k.r D/Send:       creation_time   : 2017-08:40:08
    
10:40:41.424 7..8/c.k.r D/Send:       handler_name    : SoundHandle
    
10:40:41.425 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] using SAR=1/1
    
10:40:41.425 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] using cpu capabilities: none!
    
10:40:41.425 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] profile Main, level 3.1
    
10:40:41.425 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] 264 - core 148 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=60 keyint_min=6 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=512 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
10:40:41.425 7..8/c.k.r D/Send: Output #0, flv, to 'rtmp://a.rtmp.youtube.com/live2/b2mb-vjew-2205-8w39':
    
10:40:41.425 7..8/c.k.r D/Send:   Metadata:
    
10:40:41.425 7..8/c.k.r D/Send:     major_brand     : mp42
    
10:40:41.425 7..8/c.k.r D/Send:     minor_version   : 0
    
10:40:41.425 7..8/c.k.r D/Send:     compatible_brands: isommp42
    
10:40:41.425 7..8/c.k.r D/Send:     com.android.version: 6.0.1
    
10:40:41.425 7..8/c.k.r D/Send:     encoder         : Lavf57.25.100
    
10:40:41.425 7..8/c.k.r D/Send:     Stream #0:0(eng): Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 512 kb/s, 30 fps, 1k tbn, 30 tbc (default)
    
10:40:41.425 7..8/c.k.r D/Send:     Metadata:
    
10:40:41.425 7..8/c.k.r D/Send:       creation_time   : 2017-08:40:08
    
10:40:41.425 7..8/c.k.r D/Send:       handler_name    : VideoHandle
    
10:40:41.425 7..8/c.k.r D/Send:       encoder         : Lavc57.24.102 libx264
    
10:40:41.425 7..8/c.k.r D/Send:     Side data:
    
10:40:41.425 7..8/c.k.r D/Send:       unknown side data type 10 (24 bytes)
    
10:40:41.425 7..8/c.k.r D/Send:     Stream #0:1(eng): Audio: aac (LC) ([10][0][0][0] / 0x000A), 44100 Hz, mono, fltp, 69 kb/s (default)
    
10:40:41.426 7..8/c.k.r D/Send:     Metadata:
    
10:40:41.426 7..8/c.k.r D/Send:       creation_time   : 2017-08:40:08
    
10:40:41.426 7..8/c.k.r D/Send:       handler_name    : SoundHandle
    
10:40:41.426 7..8/c.k.r D/Send:       encoder         : Lavc57.24.102 aac
    
10:40:41.426 7..8/c.k.r D/Send: Stream mapping:
    
10:40:41.426 7..8/c.k.r D/Send:   Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
    
10:40:41.427 7..8/c.k.r D/Send:   Stream #0:1 -> #0:1 (aac (native) -> aac (native))
    
10:40:41.427 7..8/c.k.r D/Send: Press [q] to stop, [?] for help
    
10:40:41.427 7..8/c.k.r D/Send: frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.92 bitrate=   4.3kbits/s speed=1.82x    
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.912331 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.874321 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.903664 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.884666 too large
    
10:40:41.427 7..8/c.k.r D/Send: frame=   12 fps= 12 q=0.0 size=       0kB time=00:00:01.03 bitrate=   3.9kbits/s dup=0 drop=2 speed=   1x    
    
10:40:41.427 7..8/c.k.r D/Send: frame=   25 fps= 16 q=0.0 size=       0kB time=00:00:01.03 bitrate=   3.9kbits/s dup=0 drop=2 speed=0.667x    
    
10:40:41.427 7..8/c.k.r D/Send: frame=   32 fps= 15 q=0.0 size=       0kB time=00:00:02.02 bitrate=   2.0kbits/s dup=0 drop=2 speed=0.98x    
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.792656 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.710991 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.688332 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.710655 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.716331 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.713661 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.688332 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.633659 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.661324 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.670998 too large
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.640327 too large
    
10:40:41.427 7..8/c.k.r D/Send: frame=   47 fps=6.7 q=0.0 size=       0kB time=00:00:02.02 bitrate=   2.0kbits/s dup=0 drop=2 speed=0.288x    
    
10:40:41.427 7..8/c.k.r D/Send: Past duration 0.605324 too large
    
10:40:41.428 7..8/c.k.r D/Send: Past duration 0.614998 too large
    
10:40:41.428 7..8/c.k.r D/Send: frame=   51 fps=6.6 q=42.0 size=       4kB time=00:00:02.02 bitrate=  17.0kbits/s dup=0 drop=2 speed=0.263x    
    
10:40:41.428 7..8/c.k.r D/Send: Past duration 0.605995 too large
    
10:40:41.428 7..8/c.k.r D/Send: Past duration 0.608986 too large
    
10:40:41.428 7..8/c.k.r D/Send: frame=   53 fps=5.8 q=42.0 size=       9kB time=00:00:02.02 bitrate=  34.8kbits/s dup=0 drop=2 speed=0.223x    
    
10:40:41.428 7..8/c.k.r D/Send: Past duration 0.614326 too large
    
10:40:41.428 7..8/c.k.r D/Send: frame=   56 fps=5.7 q=41.0 size=      16kB time=00:00:02.02 bitrate=  66.2kbits/s dup=0 drop=2 speed=0.206x    
    
10:40:41.428 7..8/c.k.r D/Send: frame=   58 fps=5.5 q=41.0 size=      20kB time=00:00:02.02 bitrate=  82.1kbits/s dup=0 drop=2 speed=0.193x    
    
10:40:41.428 7..8/c.k.r D/Send: frame=   61 fps=5.2 q=41.0 size=      27kB time=00:00:02.02 bitrate= 108.3kbits/s dup=0 drop=2 speed=0.173x    
    
10:40:41.428 7..8/c.k.r D/Send: frame=   64 fps=5.1 q=41.0 size=      33kB time=00:00:02.02 bitrate= 133.1kbits/s dup=0 drop=2 speed=0.161x    
    
10:40:41.428 7..8/c.k.r D/Send: frame=   67 fps=4.8 q=40.0 size=      38kB time=00:00:02.02 bitrate= 154.5kbits/s dup=0 drop=2 speed=0.145x    
    
10:40:41.428 7..8/c.k.r D/Send: frame=   69 fps=4.7 q=40.0 size=      42kB time=00:00:02.02 bitrate= 169.5kbits/s dup=0 drop=2 speed=0.138x    
    
10:40:41.428 7..8/c.k.r D/Send: frame=   71 fps=4.6 q=39.0 size=      45kB time=00:00:02.02 bitrate= 183.6kbits/s dup=0 drop=2 speed=0.132x    
    
10:40:41.428 7..8/c.k.r D/Send: frame=   73 fps=4.5 q=39.0 size=      46kB time=00:00:02.02 bitrate= 187.6kbits/s dup=0 drop=2 speed=0.125x    
    
10:40:41.428 7..8/c.k.r D/Send: frame=   76 fps=4.5 q=38.0 size=      49kB time=00:00:02.48 bitrate= 162.7kbits/s dup=0 drop=2 speed=0.149x    
    
10:40:41.428 7..8/c.k.r D/Send: Past duration 0.686333 too large
    
10:40:41.428 7..8/c.k.r D/Send: Past duration 0.840324 too large
    
10:40:41.428 7..8/c.k.r D/Send: frame=   78 fps=4.5 q=37.0 size=      53kB time=00:00:02.54 bitrate= 171.5kbits/s dup=0 drop=2 speed=0.147x    
    
10:40:41.428 7..8/c.k.r D/Send: Past duration 0.739662 too large
    
10:40:41.429 7..8/c.k.r D/Send: Past duration 0.671333 too large
    
10:40:41.429 7..8/c.k.r D/Send: frame=   80 fps=4.5 q=37.0 size=      59kB time=00:00:02.54 bitrate= 188.7kbits/s dup=0 drop=2 speed=0.143x    
    
10:40:41.429 7..8/c.k.r D/Send: [flv @ 0xb5ba9600] Failed to update header with correct duration.
    
10:40:41.429 7..8/c.k.r D/Send: [flv @ 0xb5ba9600] Failed to update header with correct filesize.
    
10:40:41.429 7..8/c.k.r D/Send: frame=   80 fps=2.6 q=-1.0 Lsize=     155kB time=00:00:02.70 bitrate= 468.9kbits/s dup=0 drop=2 speed=0.0877x    
    
10:40:41.429 7..8/c.k.r D/Send: video:128kB audio:23kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.617489%
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] frame I:2     Avg QP:28.63  size:  3516
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] frame P:62    Avg QP:28.45  size:  1878
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] frame B:16    Avg QP:29.68  size:   400
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] consecutive B-frames: 71.2%  5.0%  3.8% 20.0%
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] mb I  I16..4: 98.8%  0.0%  1.2%
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] mb P  I16..4: 17.8%  0.0%  0.1%  P16..4: 17.0%  0.2%  0.7%  0.0%  0.0%    skip:64.2%
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] mb B  I16..4:  0.1%  0.0%  0.0%  B16..8: 11.9%  0.0%  0.0%  direct: 1.0%  skip:87.0%  L0:16.0% L1:84.0% BI: 0.0%
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] final ratefactor: 30.20
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] coded y,uvDC,uvAC intra: 1.4% 20.4% 0.0% inter: 0.4% 14.0% 0.0%
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] i16 v,h,dc,p: 66% 22%  7%  4%
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu:  7% 19% 53%  4%  4%  3%  5%  2%  2%
    
10:40:41.429 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] i8c dc,h,v,p: 71% 16% 12%  0%
    
10:40:41.430 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] Weighted P-Frames: Y:6.5% UV:6.5%
    
10:40:41.430 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] ref P L0: 85.6%  4.5%  7.7%  2.2%  0.0%
    
10:40:41.430 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] ref B L0: 99.3%  0.7%
    
10:40:41.430 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] ref B L1: 97.0%  3.0%
    
10:40:41.430 7..8/c.k.r D/Send: [libx264 @ 0xb5b84800] kb/s:384.88
    
10:40:41.430 7..8/c.k.r D/Send: [aac @ 0xb5b85000] Qavg: 1561.786

    Thanks for your time and insights !

  • C++ OpenCV 3.4 / FFMPEG 3.4.1 VideoWriter and MP4 Output File Format

    11 janvier 2019, par PhilBot

    I’m running on an ARM BeagleBone X-15 Debian machine with Linux Kernel 4.9.35-ti-r44. In my C++ ( Qt 5 ) application, I want to save my cv::Mat frames to an MP4 format video. I have libx264 installed and compiled from scratch both ffmpeg and OpenCv. I can successfully record and view video with MJPEG with the AVI video container type but not MP4. Whenever I try to write an MP4 video, I get run time errors of the form :

    OpenCV: FFMPEG: tag 0x44495658/'XVID' is not supported with codec id 13 and format 'mp4 / MP4 (MPEG-4 Part 14)'
    
OpenCV: FFMPEG: fallback to use tag 0x00000020/' ???'

    I’ve tried various Google answers but none have worked.

    Relevant code :

    cv::Size frameSize = frame.size();
    

    
qDebug() << "Initializing Video Recording to save Video file here: " << destinationFileName;
    

    
std::string filename = destinationFileName.toStdString();
    
//int fcc =   CV_FOURCC('M','J','P','G');
    
//int fcc =   CV_FOURCC('X','2','6','4');
    
int fcc = CV_FOURCC('X','V','I','D');
    
int fps =   1;
    
videoRecorder = new cv::VideoWriter(filename,fcc,fps,frameSize);
    

    
...
    

    
videoRecorder->write(frame);

    I’ve downloaded and built the latest OpenCV 3.4 but the problem persists.
    How can I write to an MP4 File with OpenCV’s video writer ?

    When I try the ’X’,’2’,’6’,’4’ format I get the error :

        Initializing Video Recording to save Video file here:  "/tmp/Garage.mp4"
    
OpenCV: FFMPEG: tag 0x34363258/'X264' is not supported with codec id 28 and format 'mp4 / MP4 (MPEG-4 Part 14)'
    
OpenCV: FFMPEG: fallback to use tag 0x31637661/'avc1'
    
[h264_v4l2m2m @ 0x81042020] Could not find a valid device
    
[h264_v4l2m2m @ 0x81042020] can't configure encoder
    
Could not open codec 'h264_v4l2m2m': Unspecified error
    
Starting

    When I try the ’X’,’V’,’I’,’D’ format I get the error :

    Initializing Video Recording to save Video file here:  "/tmp/Garage.mp4"
    
OpenCV: FFMPEG: tag 0x44495658/'XVID' is not supported with codec id 13 and format 'mp4 / MP4 (MPEG-4 Part 14)'
    
OpenCV: FFMPEG: fallback to use tag 0x7634706d/'mp4v'
    
Starting

    When I try the ’M’,’P’,’E’,’G’ format I get the error :

    Initializing Video Recording to save Video file here:  "/tmp/Garage.mp4"
    
OpenCV: FFMPEG: tag 0x4745504d/'MPEG' is not supported with codec id 2 and format 'mp4 / MP4 (MPEG-4 Part 14)'
    
OpenCV: FFMPEG: fallback to use tag 0x7634706d/'mp4v'
    
Starting

    When I try the ’H’,’2’,’6’,’4’ format I get the error :

    OpenCV: FFMPEG: tag 0x34363248/'H264' is not supported with codec id 28 and format 'mp4 / MP4 (MPEG-4 Part 14)'
    
OpenCV: FFMPEG: fallback to use tag 0x31637661/'avc1'
    
[h264_v4l2m2m @ 0x7fdde340] Could not find a valid device
    
[h264_v4l2m2m @ 0x7fdde340] can't configure encoder
    
Could not open codec 'h264_v4l2m2m': Unspecified error
    
Starting

    When I try the ’M’,’P’,’4’,’V’ format I get the error :

    Initializing Video Recording to save Video file here:  "/tmp/Garage.mp4"
    
OpenCV: FFMPEG: tag 0x5634504d/'MP4V' is not supported with codec id 13 and format 'mp4 / MP4 (MPEG-4 Part 14)'
    
OpenCV: FFMPEG: fallback to use tag 0x7634706d/'mp4v'
    
Starting

    When I try the ’A’,’V’,’C’,’1’ format I get the error :

    Initializing Video Recording to save Video file here:  "/tmp/Garage.mp4"
    
OpenCV: FFMPEG: tag 0x31435641/'AVC1' is not supported with codec id 28 and format 'mp4 / MP4 (MPEG-4 Part 14)'
    
OpenCV: FFMPEG: fallback to use tag 0x31637661/'avc1'
    
[h264_v4l2m2m @ 0x810f5f50] Could not find a valid device
    
[h264_v4l2m2m @ 0x810f5f50] can't configure encoder
    
Could not open codec 'h264_v4l2m2m': Unspecified error
    
Starting

    When I try the ’D’,’I’,’V’,’X’ format I get the error :

    Initializing Video Recording to save Video file here:  "/tmp/Garage.mp4"
    
OpenCV: FFMPEG: tag 0x58564944/'DIVX' is not supported with codec id 13 and format 'mp4 / MP4 (MPEG-4 Part 14)'
    
OpenCV: FFMPEG: fallback to use tag 0x7634706d/'mp4v'
    
Starting

    When I try the 0x21 format I get the error :

    Initializing Video Recording to save Video file here:  "/tmp/Garage.mp4"
    
OpenCV: FFMPEG: tag 0x00000021/'!???' is not found (format 'mp4 / MP4 (MPEG-4 Part 14)')'
    
Starting

    Here is my complete class which shows all tried formats :

        #include "downloader.h"
    

    
Downloader::Downloader(QString url, QString destinationFile) : downloadUrl(url) , destinationFileName(destinationFile)
    
{
    

    
    didInitializeVideoWriter = false;
    

    
    qDebug() << "Initialized Downloader...";
    

    
}
    

    
Downloader::~Downloader() {
    

    
    videoRecorder->release();
    
    delete videoRecorder;
    

    
}
    

    
void Downloader::doDownload()
    
{
    
    networkManager = new QNetworkAccessManager(this);
    

    
    connect(networkManager, SIGNAL(finished(QNetworkReply*)),
    
            this, SLOT(replyFinished(QNetworkReply*)));
    

    
    networkManager->get(QNetworkRequest(QUrl(downloadUrl)));
    
}
    

    
void Downloader::writeFrame(cv::Mat frame) {
    

    
    QMutexLocker locker(&videoFrameMutex);
    

    
    videoRecorder->write(frame);
    

    
}
    

    
void Downloader::replyFinished(QNetworkReply *reply)
    
{
    

    
    if(reply->error())
    
    {
    
        qDebug() << "ERROR!";
    
        qDebug() << reply->errorString();
    
    }
    
    else
    
    {
    
        //qDebug() << reply->header(QNetworkRequest::ContentTypeHeader).toString();
    
        //qDebug() << reply->header(QNetworkRequest::LastModifiedHeader).toDateTime().toString();
    
        //qDebug() << reply->header(QNetworkRequest::ContentLengthHeader).toULongLong();
    
        qDebug() << reply->attribute(QNetworkRequest::HttpStatusCodeAttribute).toInt();
    
        qDebug() << reply->attribute(QNetworkRequest::HttpReasonPhraseAttribute).toString();
    

    
        QString tempFileName = destinationFileName;
    
        QString jpegTempFilename = QString("%1").arg(tempFileName.replace("mp4","jpeg"));
    

    
        qDebug() << "Overwriting: " << jpegTempFilename;
    
        QFile *file = new QFile(jpegTempFilename);
    
        if(file->open(QFile::WriteOnly))
    
        {
    
            file->write(reply->readAll());
    
            file->flush();
    
            file->close();
    
        }
    
        delete file;
    

    
        cv::Mat frame = imread(jpegTempFilename.toStdString(), CV_LOAD_IMAGE_COLOR);   // CV_LOAD_IMAGE_COLOR (>0) loads the image in the BGR format
    
        cv::cvtColor(frame,frame,CV_BGR2RGB);
    

    
        // Now lazy load the recorder
    
        if ( !didInitializeVideoWriter ) {
    

    
            cv::Size frameSize = frame.size();
    

    
            qDebug() << "Initializing Video Recording to save Video file here: " << destinationFileName;
    

    
            std::string filename = destinationFileName.toStdString();
    
            //int fcc =   CV_FOURCC('M','J','P','G');
    
            int fcc =   CV_FOURCC('X','2','6','4');
    
            //int fcc = CV_FOURCC('X','V','I','D');
    
            //int fcc = CV_FOURCC('M','P','E','G');
    
            //int fcc = CV_FOURCC('H','2','6','4');
    
            //int fcc = CV_FOURCC('M','P','4','V');
    
            //int fcc = CV_FOURCC('A','V','C','1');
    
            //int fcc = CV_FOURCC('D','I','V','X');
    
            //int fcc = 0x21;
    
            //int fcc = 0x00000021;
    
            int fps =   1;
    
            videoRecorder = new cv::VideoWriter(filename,fcc,fps,frameSize);
    

    
            qDebug() << "Starting";
    
            frameCounter = 1;
    
            performanceTimer.start();
    

    
            didInitializeVideoWriter = true;
    

    
        }
    

    
        cv::putText(frame,"[REC]",cv::Point(50,50),5,1,cv::Scalar(0,0,225));
    

    
        QFuture<void> backgroundRun = QtConcurrent::run(this, &amp;Downloader::writeFrame, frame);
    
        //backgroundRun.waitForFinished();
    

    
    }
    

    
    reply->deleteLater();
    

    
    qDebug() &lt;&lt; "RequestTimer: " &lt;&lt; performanceTimer.elapsed() &lt;&lt; frameCounter;
    

    
    // Requests Again
    
    networkManager->get(QNetworkRequest(QUrl(downloadUrl)));
    

    
    frameCounter++;
    

    
    performanceTimer.restart();
    

    

    
}
    
</void>

    Update - I tried ’a’,’v’,’c’,’1’ and unfortunately that also does not work :

    Initializing Video Recording to save Video file here:  "/tmp/Garage.mp4"
    
[h264_v4l2m2m @ 0x810f6aa0] Could not find a valid device
    
[h264_v4l2m2m @ 0x810f6aa0] can't configure encoder
    
Could not open codec 'h264_v4l2m2m': Unspecified error
    

    
(qt-downloader:6234): GStreamer-CRITICAL **: gst_element_make_from_uri: assertion 'gst_uri_is_valid (uri)' failed
    
OpenCV Error: Unspecified error (GStreamer: cannot link elements
    
) in CvVideoWriter_GStreamer::open, file /media/usb/opencv/modules/videoio/src/cap_gstreamer.cpp, line 1635
    
VIDEOIO(cvCreateVideoWriter_GStreamer (filename, fourcc, fps, frameSize, is_color)): raised OpenCV exception:
    

    
/media/usb/opencv/modules/videoio/src/cap_gstreamer.cpp:1635: error: (-2) GStreamer: cannot link elements
    
 in function CvVideoWriter_GStreamer::open

    When I try the X264 FOURCC, the mp4 file is 48 bytes and never grows :

    Initializing Video Recording to save Video file here:  "/tmp/Garage.mp4"
    
OpenCV: FFMPEG: tag 0x34363258/'X264' is not supported with codec id 27 and format 'mp4 / MP4 (MPEG-4 Part 14)'
    
OpenCV: FFMPEG: fallback to use tag 0x31637661/'avc1'

    Static Size :

    debian@BeagleBoard-X15:/tmp$ ls -lrt Garage.*
    
-rw-r--r-- 1 debian debian     48 Dec 24 21:13 Garage.mp4
    
-rw-r--r-- 1 debian debian 100424 Dec 24 21:14 Garage.jpeg
    
debian@BeagleBoard-X15:/tmp$ hexdump Garage.mp4 
    
0000000 0000 2000 7466 7079 7369 6d6f 0000 0002
    
0000010 7369 6d6f 7369 326f 7661 3163 706d 3134
    
0000020 0000 0800 7266 6565 0000 0000 646d 7461
    
0000030

    Here is my ffmpeg build conf :

    debian@BeagleBoard-X15:/tmp$ ffmpeg -buildconf
    
ffmpeg version N-89524-g74f408cc8e Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 6.3.0 (Debian 6.3.0-18) 20170516
    
  configuration: --enable-gpl --enable-libx264 --enable-pthreads --enable-static --extra-cflags=-I./x264/include --extra-ldflags=-L./x264/lib --extra-libs=-ldl
    
  libavutil      56.  6.100 / 56.  6.100
    
  libavcodec     58.  8.100 / 58.  8.100
    
  libavformat    58.  3.100 / 58.  3.100
    
  libavdevice    58.  0.100 / 58.  0.100
    
  libavfilter     7.  7.100 /  7.  7.100
    
  libswscale      5.  0.101 /  5.  0.101
    
  libswresample   3.  0.101 /  3.  0.101
    
  libpostproc    55.  0.100 / 55.  0.100
    

    
  configuration:
    
    --enable-gpl
    
    --enable-libx264
    
    --enable-pthreads
    
    --enable-static
    
    --extra-cflags=-I./x264/include
    
    --extra-ldflags=-L./x264/lib
    
    --extra-libs=-ldl

  • How to measure the performance of a newsletter (or any email) with Piwik

    19 décembre 2017, par InnoCraft — Community

    To be able to grow your business, it is crucial to track all your marketing efforts. This includes all newsletters and emails that you share with people outside of your business. Otherwise, you won’t be able to know which of your daily efforts are yielding results.

    Are you wondering if it is possible to track the performance of an emailing campaign in Piwik efficiently ? Would you like to know if it is technically easy ? No worries, here is a “How to” tutorial showing you how easily you can track an emailing in Piwik properly.

    Different tracking levels for different needs

    There are many things that you may be interested to track, for example :

    1. How many users opened your email
    2. How many users interacted with the links in your email
    3. How many users interacted on your website through your email

    Let’s have a look at each of these levels.

    Step 1 – Tracking email and newsletter openings in Piwik

    Tracking email openings requires to add an HTML code to your newsletter. It works through what we call a tracking pixel, a tiny image of 1×1 that is transparent so the user will not be able to see it.
    In order to install it, here is an example of what this code looks like :

    &lt;img src="https://piwik.example.com/piwik.php?idsite=YOUR_PIWIK_WEBSITE_ID&amp;rec=1&amp;bots=1&amp;url=https%3A%2F%2Fexample.com%2Femail-opened%2Fnewsletter_XYZ&amp;action_name=Email%20opened&amp;_rcn=internal%20email%20name&amp;_rck=newsletter_XYZ" style="border:0;&rdquo; alt="" /&gt;

    The Piwik tracking pixel explained

    The above URL is composed of the following URL parameters which are part of our Tracking API :

    • idsite : Corresponds to the ID of the website you would like to track.
    • rec : You need to have rec=1 in order for the request to be actually recorded.
    • bots : Set it to 1 to include all the connections made to this request, bots included.
    • url : corresponds to the URL you would like to display in Piwik every time the email is opened.
    • action_name : This is the page name you would like to be tracked when the email is opened.
    • _rcn : The name you would like to give to your campaign.
    • _rck : The keyword you may like to use in order to summarize the content of your newsletter.

    You may have noticed some special characters here such as “%20”, “%2F”. That’s because the URL is encoded. We strongly recommend you to do so in order for your tracking not to break. Many tools are available on the web in order to encode your URLs such as https://www.urlencoder.org/.

    If you would like to access the previous tracking code easily, keep in mind that you can always find the tracking code generator within the “Piwik admin panel → Tracking code” :

    You can find more information about it on our guide at : How do I track how many users open and read my newsletter emails (using a pixel / beacon) ?

    As a result, the information will be pushed as following for any user who opens your email :

    To not bias your regular page views on your website with newsletter openings, we recommend tracking newsletter openings into a new website.

    Tracking even more data : the user ID example

    You can go deeper in your URL tracking by inserting other parameters such as the user id if you have this information within your emailing database. One of the main benefit of tracking the User ID is to connect data across multiple devices and browsers for a given user.

    You only need to add the following parameter &uid=XXX where XXX equals the dynamic value of the user ID :

    Make sure that UID from your emailing provider is the same as the one used on your website in order for your data to be consistent.

    Important note : some email providers are loading email messages by default which results in an opening even if the user did not actually open the email.

    Step 2 – Measure the clicks within your emailing

    Tracking clicks within an email lets you know with which content readers interacted the most. We recommend tracking all links in all your emails as a campaign, whether it is a newsletter, a custom support email, an email invoice, etc. You might be surprised to see which of your emails lead to conversions and if they don’t, try to tweak those emails, so they might in the future.

    Tracking clicks This works thanks to URL campaign tracking. In order to perform this action, you will need to add Piwik URL parameters to all your existing link URLs :

    • Website URL : for example “www.your-website.com”.
    • Campaign name : for example “pk_campaign=emailing”. Represents the name you would like to give to your campaign.
    • Campaign keyword : for example “pk_keyword=name-of-your-article”. Represents the name you would like to give to your content.
    • Campaign source : for example “pk_source=newsletter”. Represents the name of the referrer.
    • Campaign medium : for example “pk_medium=email”. Represents the type of referrer you are using.
    • Campaign content : for example “pk_content=title”. Represents the type of content.

    You can find more information about campaign url tracking in our “Tracking marketing campaigns with Piwik” guide.

    Here is a sample showing you how you can differentiate some links in a newsletter, all pointing to the same URL :

    Once you have added these URL parameters to each of your link, Piwik will clearly indicate the referrer of this specific campaign when a user clicks on a link in the newsletter and visits your website.

    Important note : if you do not track your campaigns, it will result in a bad interpretation of your data within Piwik as you will get webmail services or direct entries as referrer instead of your newsletter campaign.

    Step 3 – Measure emailing performances on your website

    Thanks to Piwik URL campaign parameters, you can now clearly identify the traffic brought through your emailing. You can now specifically isolate users who come from emails by creating a segment :

    Once done, you can either have a look at each user specifically through the visitor log report or analyze it as a whole within the rest of the reports.

    You can even measure your return on investment directly if goals have been defined. In order to know more about how to track goals within Piwik.

    Did you like this article ?

    If you enjoyed reading this article, do not hesitate to share it around you. Moreover, if there are any topics you would like to write us about in particular, just drop us an email and we will be more than happy to write about it.

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