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• NGINX-RTMP : adaptive multi bitrate streaming by ffmpeg got BLACK SREEN OUT PUT

  28 mars 2022, par duxng17

  I am using Nginx-rtmp for live adaptive bitrate streaming with HLS from OBS .
The encoding is run ok , but my livestream output in my web got black screen and still have the sound . i tried many ways to fix my issue but i cant . just helping me .
THIS IS MY NGINX CONFIG :

  


  rtmp {
    server {
        listen 1935;
        chunk_size 4000;
        application live {
            live on;
            on_publish http://auth_sever:8000/auth;
            exec ffmpeg -i rtmp://localhost/live/$name
                        -c:v libx264 -profile:v baseline -b:v 768K -s 640x360 -crf 23 -f flv -c:a aac -ac 1 -strict -2 -b:a 96k rtmp://localhost/show/$name_360
                        -c:v libx264 -profile:v baseline -b:v 1024K -s 960x540 -crf 23 -f flv -c:a aac -ac 1 -strict -2 -b:a 128k rtmp://localhost/show/$name_480
                        -c:v libx264 -profile:v baseline -b:v 1920K -s 1280x720  -crf 23 -f flv -c:a aac -ac 1 -strict -2 -b:a 128k rtmp://localhost/show/$name_720
                       -c:v libx264 -profile:v baseline -b:v 4000K -s 1920x1080 -crf 23 -f flv -c:a aac -ac 1 -strict -2 -b:a 128k rtmp://localhost/show/$name_1080;
        }
        application show {
            live on;
            deny play all; # disable consuming the stream from nginx as rtmp
            hls on;
            hls_path /tmp/hls; 
            hls_nested on;
            hls_fragment 4s; # default is 5s
            hls_playlist_length 60s;
            hls_variant _360 BANDWIDTH=448000;
            hls_variant _480 BANDWIDTH=1152000;
            hls_variant _720  BANDWIDTH=2048000;
            hls_variant _1080 BANDWIDTH=4096000; 
        }
    }
}

http {
    sendfile off;
    tcp_nopush on;
    directio 512;
    default_type application/octet-stream;
    # LOAD-BALANCED
    upstream myapp {
        server localhost:8001;
        server auth_sever:8000;
    }
    server {
        listen 8080 default_server;
        location / {
        proxy_pass http://myapp;
        proxy_set_header Host            $host;
        proxy_set_header X-Forwarded-For $remote_addr;
        }
    }
    server {
        listen 8081;
        location / {
            root /www;
        }
        location /hls {
            types {
                application/vnd.apple.mpegurl m3u8;
                application/octet-stream ts;
            }
            # Disable cache
            add_header 'Cache-Control' 'no-cache';

            # CORS setup
            add_header 'Access-Control-Allow-Origin' '*' always;
            add_header 'Access-Control-Expose-Headers' 'Content-Length';

            # allow CORS preflight requests
            if ($request_method = 'OPTIONS') {
                add_header 'Access-Control-Allow-Origin' '*';
                add_header 'Access-Control-Max-Age' 1728000;
                add_header 'Content-Type' 'text/plain charset=UTF-8';
                add_header 'Content-Length' 0;
                return 204;
            }
            root /tmp;
        }
    }
}


  


  THIS MY DOCKERFILE CONFIG :

  


  FROM tiangolo/nginx-rtmp
RUN apt-get -y update
RUN apt-get -y upgrade
RUN apt-get install -y ffmpeg
COPY nginx.conf /etc/nginx/nginx.conf
COPY index.html /www/


  


  THE LAST , SORRY , MY ENG IS NOT GOOD ! thank for helping !

  


• in FFMPEG_AVAILABLE,How to insert a black frame in avpicture_fill if the frame is not available [on hold]

  22 août 2018, par Vidhi Patel

  This code should work :

  avpicture_fill((AVPicture*) picture, (tUInt8*) this->ptrOVL->get_pOutputDataOVL(), PIX_FMT_BGR24, c->width, c->height);

  but as the title says : what if the frame isn’t available ?

• ffmpeg output to stdout is a black box (python)

  27 juillet 2022, par dwilliams

  Project Background :
The project I'm working on takes an image from a UE simulation camera, uses OpenCV to convert the image to .jpg, and streams the .jpg to a localhost port so that a second program can retrieve the images and annotate the objects in the simulation. I am attempting to convert these to a suitable format for UE4's WmfMediaPlayer via ffmpeg so that it can be streamed to another localhost port.

  


  Problem :
I have managed to get a the stream active but the video at the end of stream is a black square. I'm confident but not 100% certain that I've setup the ffmpeg correctly. The output to console seem to imply that the conversion is working but I've been fooled before. It could also be the flask yield component.

  


  ffmpeg declaration/setup :

  


  process = (
        ffmpeg
        .input('C:/MOT/test.jpg')   
        .output('pipe:1', vcodec='libx264', format='avi')   
        .overwrite_output()
        .run_async(pipe_stdin=True, pipe_stdout=True)
    )


  


  Flask Integration :

  


  @app.route('/annotated')
def annotated():
    return Response(
        frame_generator_annotated(),
        mimetype='multipart/x-mixed-replace; boundary=frame'
    )


def frame_generator_annotated():
    global process
    while (True):
        frame = process.stdout.read()
        yield (b'--frame\r\n'
               b'Content-Type: video/avi\r\n\r\n' + frame + b'\r\n\r\n')


  


  stream view :
http://localhost:5001/annotated

  


  ffmpeg console output :

  


  Running on all addresses.
   WARNING: This is a development server. Do not use it in a production deployment.
 * Running on http://192.168.1.220:5001/ (Press CTRL+C to quit)
ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 10.2.1 (GCC) 20200726
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libgsm --enable-librav1e --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
[mjpeg @ 00000269be0faec0] EOI missing, emulating
Input #0, image2, from 'C:/MOT/test.jpg':
  Duration: 00:00:00.04, start: 0.000000, bitrate: 1968 kb/s
    Stream #0:0: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 1024x576 [SAR 1:1 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 00000269be0fc240] using SAR=1/1
[libx264 @ 00000269be0fc240] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 00000269be0fc240] profile High, level 3.1, 4:2:0, 8-bit
Output #0, avi, to 'pipe:1':
  Metadata:
    ISFT            : Lavf58.45.100
    Stream #0:0: Video: h264 (libx264) (H264 / 0x34363248), yuvj420p(pc), 1024x576 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 25 tbn, 25 tbc
    Metadata:
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=    1 fps=0.0 q=28.0 Lsize=       2kB time=00:00:00.04 bitrate= 447.2kbits/s speed= 2.9x    
video:1kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 157.307251%
[libx264 @ 00000269be0fc240] frame I:1     Avg QP:13.00  size:   869
[libx264 @ 00000269be0fc240] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 00000269be0fc240] 8x8 transform intra:0.0%
[libx264 @ 00000269be0fc240] coded y,uvDC,uvAC intra: 0.0% 0.0% 0.0%
[libx264 @ 00000269be0fc240] i16 v,h,dc,p: 97%  0%  3%  0%
[libx264 @ 00000269be0fc240] i8c dc,h,v,p: 100%  0%  0%  0%
[libx264 @ 00000269be0fc240] kb/s:173.80