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  • ffmpeg : video codec ansi not compatible with flv

    11 septembre 2018, par diatomym

    lets say i have 10 video files, encoded with the following command in ffmpeg

    ffmpeg -i input.mp4 -c:v libx264 -preset medium -maxrate 6000k -bufsize 6000k -vf "scale=1280:-1,format=yuv420p" -g 50 -c:a aac -b:a 128k -ac 2 -ar 44100 file.flv

    now that all files match in codec, what i want to do is stream all those files via RTMP. for that, I’ll need to create a concat list. i also want the stream to infinitely repeat those 10 files. to do all these things, I use this command :

    ffmpeg -threads 2 -re -fflags +genpts -stream_loop -1 -i mylist.txt -c copy -f flv rtmp://link.to/RTMP

    when doing that, I get the following error output :

     ffmpeg -threads 2 -re -fflags +genpts -stream_loop -1 -i mylist.txt -c copy -f flv rtmp://link.to/RTMP
    
ffmpeg version 3.4.4-0ubuntu0.18.04.1 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --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
    
  libavutil      55. 78.100 / 55. 78.100
    
  libavcodec     57.107.100 / 57.107.100
    
  libavformat    57. 83.100 / 57. 83.100
    
  libavdevice    57. 10.100 / 57. 10.100
    
  libavfilter     6.107.100 /  6.107.100
    
  libavresample   3.  7.  0 /  3.  7.  0
    
  libswscale      4.  8.100 /  4.  8.100
    
  libswresample   2.  9.100 /  2.  9.100
    
  libpostproc    54.  7.100 / 54.  7.100
    
Input #0, tty, from 'mylist.txt':
    
  Duration: 00:00:00.24, bitrate: 40 kb/s
    
    Stream #0:0: Video: ansi, pal8, 640x400, 25 fps, 25 tbr, 25 tbn, 25 tbc
    
[flv @ 0x560ec7662920] ***Video codec ansi not compatible with flv
    
Could not write header for output file #0 (incorrect codec parameters ?): Function not implemented***
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (copy)

    ffmpeg is giving me the error

    Video codec ansi not compatible with flv
    Could not write header for output file #0 (incorrect codec parameters ?): Function not implemented

    what am i doing wrong ? thanks for the help.

  • FFMPEG No encoder found for codec id 8

    3 septembre 2018, par raspiboele

    I’m using a Raspberry Pi to restreem a (https) .m3u8 stream, to a local MJPEG-stream with FFMPEG.
    Becaus I have a Nest Cam / Nest Hello and I want to import that stream into my Fibaro Homecenter (Smarthome Basestation), but the Fibaro Homecenter only eats the MJPEG format. So I made a Raspberry Pi with FFMPEG to do the trick.

    This is my /etc/ffserver.conf file :

    HTTPPort 8090
    

    
HTTPBindAddress 0.0.0.0
    

    
MaxHTTPConnections 2000
    

    
MaxClients 1000
    

    
MaxBandwidth 1000
    

    
CustomLog -
    

    
<feed>
    
File /tmp/feed1.ffm
    
FileMaxSize 30M
    
</feed>
    

    
<stream>
    
Feed feed1.ffm
    
Format mpjpeg
    
VideoFrameRate 2
    
VideoIntraOnly
    
NoAudio
    
Strict -1
    
</stream>

    My command :

     ffmpeg -i "https://path-to-stream.com/chucklist.m3u8" http://localhost:8090/feed1.ffm

    Output :

    ffmpeg version N-89723-g2ca65fc7b7 Copyright (c) 2000-2018 the FFmpeg developers
    
  built with gcc 6.3.0 (Raspbian 6.3.0-18+rpi1+deb9u1) 20170516
    
  configuration: --arch=armel --target-os=linux --enable-gpl --enable-libx264 --enable-nonfree --enable-gnutls
    
  libavutil      56.  7.100 / 56.  7.100
    
  libavcodec     58.  9.100 / 58.  9.100
    
  libavformat    58.  3.100 / 58.  3.100
    
  libavdevice    58.  0.100 / 58.  0.100
    
  libavfilter     7. 11.101 /  7. 11.101
    
  libswscale      5.  0.101 /  5.  0.101
    
  libswresample   3.  0.101 /  3.  0.101
    
  libpostproc    55.  0.100 / 55.  0.100
    
[hls,applehttp @ 0x1d16e70] Opening 'https://path-to-stream.com/chucklist.ts' for reading
    
[hls,applehttp @ 0x1d16e70] Opening 'https://path-to-stream.com/chucklist.ts' for reading
    
Input #0, hls,applehttp, from 'https://path-to-stream.com/chucklist.m3u8':
    
  Duration: N/A, start: 38789.189067, bitrate: N/A
    
  Program 0
    
    Metadata:
    
      variant_bitrate : 0
    
    Stream #0:0: Data: timed_id3 (ID3  / 0x20334449)
    
    Metadata:
    
      variant_bitrate : 0
    
    Stream #0:1: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuvj420p(pc, bt709), 1152x864 [SAR 1:1 DAR 4:3], 15 tbr, 90k tbn, 30 tbc
    
    Metadata:
    
      variant_bitrate : 0
    
    Stream #0:2: Audio: aac (LC) ([15][0][0][0] / 0x000F), 16000 Hz, mono, fltp
    
    Metadata:
    
      variant_bitrate : 0
    
[tcp @ 0x27b36f0] Connection to tcp://localhost:8090 failed (Connection refused), trying next address
    
[ffm @ 0x237a480] no encoder found for codec id 8
    
http://localhost:8090/feed1.ffm: Invalid argument

    As you can see, I get an error : no encoder found for codec id 8
    It is frutstrating me, because I’m looking for a solution for three days now. I can’t even find a list of encoders and the coresponding ID’s. Do I have to enable maybe something in the ./configure ?

    My target is to get a stream at : http://localhost:8090/test1.mjpg

    Can anyone help me please ?

  • generating silence audio using ffmpeg with specific bitrate and duration time less than one second cannot get the audio with the desired bitrate

    28 août 2018, par bambooom

    I’d like to generate a silence audio file using ffmpeg with specific bitrate and the duration is less than one second. I found that the generated audio file does not have the desired bitrate. But if I expand the duration to 2 seconds, the bitrate seems to be correct.

    For example :

    ffmpeg -f lavfi -i anullsrc=r=22050:cl=mono -t 0.3 -acodec mp3 -ab 48k -y silence.mp3

    The generated silence.mp3’s bitrate seems not 48kb/s :

    $ ffprobe silence.mp3                                                                                           
    
ffprobe version 3.4.2 Copyright (c) 2007-2018 the FFmpeg developers
    
  built with Apple LLVM version 9.1.0 (clang-902.0.39.1)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-jack --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
    
  libavutil      55. 78.100 / 55. 78.100
    
  libavcodec     57.107.100 / 57.107.100
    
  libavformat    57. 83.100 / 57. 83.100
    
  libavdevice    57. 10.100 / 57. 10.100
    
  libavfilter     6.107.100 /  6.107.100
    
  libavresample   3.  7.  0 /  3.  7.  0
    
  libswscale      4.  8.100 /  4.  8.100
    
  libswresample   2.  9.100 /  2.  9.100
    
  libpostproc    54.  7.100 / 54.  7.100
    
Input #0, mp3, from 'silence.mp3':
    
  Metadata:
    
    encoder         : Lavf57.83.100
    
  Duration: 00:00:00.37, start: 0.050113, bitrate: 52 kb/s
    
    Stream #0:0: Audio: mp3, 22050 Hz, mono, s16p, 48 kb/s

    If the duration is 2 seconds, bitrate seems OK :

    $ ffmpeg -f lavfi -i anullsrc=r=22050:cl=mono -t 2 -acodec mp3 -ab 48k -y silence.mp3
    
$ ffprobe silence.mp3                                                                                           
    
ffprobe version 3.4.2 Copyright (c) 2007-2018 the FFmpeg developers
    
  built with Apple LLVM version 9.1.0 (clang-902.0.39.1)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-jack --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
    
  libavutil      55. 78.100 / 55. 78.100
    
  libavcodec     57.107.100 / 57.107.100
    
  libavformat    57. 83.100 / 57. 83.100
    
  libavdevice    57. 10.100 / 57. 10.100
    
  libavfilter     6.107.100 /  6.107.100
    
  libavresample   3.  7.  0 /  3.  7.  0
    
  libswscale      4.  8.100 /  4.  8.100
    
  libswresample   2.  9.100 /  2.  9.100
    
  libpostproc    54.  7.100 / 54.  7.100
    
Input #0, mp3, from 'silence.mp3':
    
  Metadata:
    
    encoder         : Lavf57.83.100
    
  Duration: 00:00:02.06, start: 0.050113, bitrate: 48 kb/s
    
    Stream #0:0: Audio: mp3, 22050 Hz, mono, s16p, 48 kb/s

    Is there any way to keep the bitrate as desired ?

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