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• YouTube isn't recieving any data from my FFmpeg stream to the RTMP server

  9 novembre 2020, par Eniola Oyewole

  So I have a python programming running on my computer that is sending the same image to an RTMP server every second. The python program is reading the image and then sending the data, from the console everything seems ok but youtube says that its not receiving any data. My code :

  


  import subprocess
import cv2
rtmp_url = "rtmp://b.rtmp.youtube.com/live2/"

fps = 1.5

width = 600
height = 600

# command and params for ffmpeg
command = ['ffmpeg',
           '-y',
           '-f', 'rawvideo',
           '-vcodec', 'rawvideo',
           '-pix_fmt', 'bgr24',
           '-s', "{}x{}".format(width, height),
           '-r', str(fps),
           '-i', '-',
           '-c:v', 'libx264',
           '-pix_fmt', 'yuv420p',
           '-f', 'flv',
           rtmp_url]

# using subprocess and pipe to fetch frame data
p = subprocess.Popen(command, stdin=subprocess.PIPE)

while True:
  f = cv2.imread('assets/temporary.png')

  p.stdin.write(f.tobytes())


  


  My console :

  


  [rtmp @ 0x28d9940] Server response validating failed&#xA;<videocapture 0x7f60895dafb0="0x7f60895dafb0">&#xA;ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers&#xA;  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)&#xA;  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared&#xA;  libavutil      55. 78.100 / 55. 78.100&#xA;  libavcodec     57.107.100 / 57.107.100&#xA;  libavformat    57. 83.100 / 57. 83.100&#xA;  libavdevice    57. 10.100 / 57. 10.100&#xA;  libavfilter     6.107.100 /  6.107.100&#xA;  libavresample   3.  7.  0 /  3.  7.  0&#xA;  libswscale      4.  8.100 /  4.  8.100&#xA;  libswresample   2.  9.100 /  2.  9.100&#xA;  libpostproc    54.  7.100 / 54.  7.100&#xA;Input #0, rawvideo, from &#x27;pipe:&#x27;:&#xA;  Duration: N/A, start: 0.000000, bitrate: 12960 kb/s&#xA;    Stream #0:0: Video: rawvideo (BGR[24] / 0x18524742), bgr24, 600x600, 12960 kb/s, 1.50 fps, 1.50 tbr, 1.50 tbn, 1.50 tbc&#xA;Stream mapping:&#xA;  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))&#xA;[libx264 @ 0x5613ba2e3d40] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2&#xA;[libx264 @ 0x5613ba2e3d40] profile High, level 2.2&#xA;[libx264 @ 0x5613ba2e3d40] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 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=250 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00&#xA;Output #0, flv, to &#x27;rtmp://b.rtmp.youtube.com/live2/<key>&#x27;:&#xA;  Metadata:&#xA;    encoder         : Lavf57.83.100&#xA;    Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 600x600, q=-1--1, 1.50 fps, 1k tbn, 1.50 tbc&#xA;    Metadata:&#xA;      encoder         : Lavc57.107.100 libx264&#xA;    Side data:&#xA;      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1&#xA;frame=   55 fps=0.0 q=19.0 size=      20kB time=00:00:01.33 bit&#xA;</key></videocapture>

  


• Transcode raw audio data (PCM | PCM_ALAW | PCM_ULAW) to an audio file with the MKA extension

  15 septembre 2020, par bbdd

  My task is to package raw audio data (PCM_ALAW, PCM_ULAW, PCM_S16LE, PCM_S16BE) into an MKA container. Looking through this example, I came across the question, how do I change the functions of receiving the input audio file, to the functions that accept raw data for packaging into an audio file.

  


  I need to make such functionality as in this original example :

  


  ffmpeg -f alaw -ar 8000 -ac 1 -i rawData test.mka


  


  But in my case, I can only use the ``ffmpeg` API library.

  


  The example shows the logic for receiving an audio file with a specific extension to determine the codec and other configuration parameters. But when feeding simple raw data, the program will crash because it can't determine what it is getting. I need to define functions that will help the library understand that it receives raw audio file data as input, with parameters such as :

  


  

  • Sample rate

  


  • Bit rate

  


  • Channels

  


  • Sample format and more...

  


  


  This is what using this method should look like :

  


  int main(int argc, char **argv)
{
    QFile file("rawPcmAlawData.bin");
    if (!file.open(QIODevice::ReadOnly)) {
        return EXIT_FAILURE;
    }
    QByteArray rawPcmAlawData(file.readAll());

    AudioGenerater generator;
    generator.generateAudioFileWithOptions(
        // Input options
        rawPcmAlawData,       // Input raw data
        1,                    // Number channels
        64000,                // Bit-rate
        8000,                 // Sample rate
        AV_CODEC_ID_PCM_ALAW, // The type of input raw data

        // Output options
        "test.mka",           // Audio file where raw data will be recorded. 
        1,                    // Number channels
        64000,                // Bit-rate
        8000,                 // Sample rate
        AV_SAMPLE_FMT_S16     // Sample format);

    return 0;
}



  


  I do not know how to do this and what exactly I need to determine. I ask for Your help.

  


• Ffmpeg invalid data when trying to merge videos

  30 juillet 2020, par Luka Milivojevic

  I have a below function for merging videos in Python without re-encoding using FFmpeg :

  


  def merge():
    """
    This function merges a group of videos into one long video.
    It is used for merging parts that are cut from original video into a new one.
    The videos are merged using ffmpeg and for the ffmpeg
    to use the concat method on them, the video names must be put inside
    the vidlist.txt file.
    New video is saved to the file named output.mp4.
    """
    command = "ffmpeg -hide_banner -loglevel error -f concat -safe 0 -i vidlist.txt -c copy output.mp4"
    # merge multiple parts of the video
    subprocess.call(command, shell=True)


  


  I store paths to videos to be merged inside a vidlist.txt file which looks like :

  


  file 'out11.mp4'
file 'out21.mp4'


  


  But, I am getting the following error :

  


  vidlist.txt: Invalid data found when processing input


  


  Here is the report file :

  


  ffmpeg started on 2020-07-30 at 20:23:53
Report written to "ffmpeg-20200730-202353.log"
Log level: 48
Command line:
ffmpeg -hide_banner -f concat -safe 0 -i "C:\\Users\\miliv\\videocutter\\utils\\vidlist.txt" -c copy output.mp4 -report
Splitting the commandline.
Reading option '-hide_banner' ... matched as option 'hide_banner' (do not show program banner) with argument '1'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'concat'.
Reading option '-safe' ... matched as AVOption 'safe' with argument '0'.
Reading option '-i' ... matched as input url with argument 'C:\Users\miliv\videocutter\utils\vidlist.txt'.
Reading option '-c' ... matched as option 'c' (codec name) with argument 'copy'.
Reading option 'output.mp4' ... matched as output url.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option hide_banner (do not show program banner) with argument 1.
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url C:\Users\miliv\videocutter\utils\vidlist.txt.
Applying option f (force format) with argument concat.
Successfully parsed a group of options.
Opening an input file: C:\Users\miliv\videocutter\utils\vidlist.txt.
[concat @ 000001aaafb8e400] Opening 'C:\Users\miliv\videocutter\utils\vidlist.txt' for reading
[file @ 000001aaafb8f500] Setting default whitelist 'file,crypto,data'
[AVIOContext @ 000001aaafb97700] Statistics: 0 bytes read, 0 seeks
C:\Users\miliv\videocutter\utils\vidlist.txt: Invalid data found when processing input