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• How can I skip an image error when trimming an mp3 with ffmpeg

  29 septembre 2016, par John Pollard

  I am running the following command to get cut a 30 second section of the file

  ffmpeg -i 'river.mp3' -ss 30 -t 30 -acodec libmp3lame -b:a 128k 'audio_trimmed.mp3'

  but I am getting a "Invalid PNG signature" error. Is there a way to skip the image since I don’t need it and have the command run successfully ?

  ffmpeg version 2.8.5 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with Apple LLVM version 7.3.0 (clang-703.0.31)
  
    configuration: --prefix=/usr/local/Cellar/ffmpeg/2.8.5 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libvo-aacenc --enable-libxvid --enable-libvorbis --enable-vda
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  [mp3 @ 0x7f8419010600] Skipping 0 bytes of junk at 73436.
  
  [png @ 0x7f8419812600] Invalid PNG signature 0xFFD8FFE000104A46.
  
  [mp3 @ 0x7f8419010600] decoding for stream 1 failed
  
  [mp3 @ 0x7f8419010600] Could not find codec parameters for stream 1 (Video: png, none(pc)): unspecified size
  
  Consider increasing the value for the 'analyzeduration' and 'probesize' options
  
  Input #0, mp3, from 'river.mp3':
  
    Metadata:
  
      genre           : Podcast
  
      album           : River City Church's Podcast
  
      artist          : Antley Fowler
  
      title           : Jubilee Brings Justice
  
      date            : 2016-08-15 10:23
  
    Duration: 00:28:28.07, start: 0.025056, bitrate: 64 kb/s
  
      Stream #0:0: Audio: mp3, 44100 Hz, mono, s16p, 64 kb/s
  
      Stream #0:1: Video: png, none(pc), 90k tbr, 90k tbn, 90k tbc
  
      Metadata:
  
        title           : Episode Artwork
  
        comment         : Cover (front)
  
  [buffer @ 0x7f8418c18de0] Unable to parse option value "0x0" as image size
  
  [buffer @ 0x7f8418c18de0] Unable to parse option value "-1" as pixel format
  
  [buffer @ 0x7f8418c18de0] Unable to parse option value "0x0" as image size
  
  [buffer @ 0x7f8418c18de0] Error setting option video_size to value 0x0.
  
  [graph 0 input from stream 0:1 @ 0x7f8418c18ee0] Error applying options to the filter.
  
  Error opening filters!

• Send ffmpeg input from python variable

  27 septembre 2016, par Roney rogerio

  I need send continuouns date to ffmpeg from python, I have tried but really dont know the best solution to make this, i have tried :

  import subprocess as sp
  
  import time
  
  
  
  command = ["/usr/bin/ffmpeg",
  
             '-f', 'hls',
  
             '-c', 'copy',
  
             '-hls_time', '10',
  
             '-hls_flags', 'delete_segments',
  
             '-i', '-', # The imput comes from a pipe
  
             'index.m3u8' ]
  
  
  
  proc = sp.Popen(command, stdin=sp.PIPE)
  
  
  
  proc.stdin.write(open("video.ts", 'r').read())
  
  
  
  proc.stdin.close()
  
  proc.wait()

  I get the error :

  ffmpeg version N-80901-gfebc862 Copyright (c) 2000-2016 the FFmpeg developers
  
    built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
    configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
  
    libavutil      55. 28.100 / 55. 28.100
  
    libavcodec     57. 48.101 / 57. 48.101
  
    libavformat    57. 41.100 / 57. 41.100
  
    libavdevice    57.  0.102 / 57.  0.102
  
    libavfilter     6. 47.100 /  6. 47.100
  
    libavresample   3.  0.  0 /  3.  0.  0
  
    libswscale      4.  1.100 /  4.  1.100
  
    libswresample   2.  1.100 /  2.  1.100
  
    libpostproc    54.  0.100 / 54.  0.100
  
  pipe:: Invalid data found when processing input
  
  Traceback (most recent call last):
  
    File "teste.py", line 15, in <module>
  
      proc.stdin.write(open("video.ts", 'r').read())
  
  IOError: [Errno 32] Broken pipe
  
  </module>

• Can't publish stream on Wowza Streaming engine. Server creates and immediately destroy stream

  1er novembre 2016, par user2365252

  I have set up the Wowza Streaming Engine on the AWS with application name "live". I have opened all necessary ports for the Wowza on the AWS to receive and re transmit the video stream.

  I am taking stream from NVR in the LAN and publishing the video stream from Ubuntu machine using FFMPEG with below command on to Wowza Server.

  ffmpeg -v debug -i "rtsp://888888:888888@192.168.1.5:554/cam/realmonitor?channel=1&subtype=1"  -acodec copy -vcodec copy -sn -f flv "rtmp://xx.xx.xx.xx:1935/live/channel1 live=true pubUser=un pubPasswd=pw"

  It gives me following error after around 60 secs on the terminal.

  Successfully parsed a group of options.
  
  Opening an output file: rtmp://xx.xx.xx.xx:1935/live/channel1 live=true pubUser=un pubPasswd=pw.
  
  Parsing...
  
  Parsed protocol: 0
  
  Parsed host    : xx.xx.xx.xx
  
  Parsed app     : live
  
  RTMP_Connect0, failed to connect socket. 110 (Connection timed out)
  
  rtmp://xx.xx.xx.xx:1935/live/channel1 live=true pubUser=un pubPasswd=pw: Unknown error occurred

  So, I checked the Wowza server log for any clue and I found this.

  2016-09-27  08:22:31  UTC   comment server  INFO    200 -   MediaCasterStreamValidator.init[live/_definst_]: Started
  
  2016-09-27  08:22:31  UTC   comment server  INFO    200 -   ModuleCoreSecurity.onAppStart[live/_definst_]: Publish: AllowedEncoders: securityPublishValidEncoders:Wirecast/|FME/|FMLE/|Wowza GoCoder*|Lavf/|UA Teradek/|KulaByte/|VidBlaster/|XSplit/|PESA  
  
  2016-09-27  08:22:31  UTC   comment server  INFO    200 -   ModuleCoreSecurity.onAppStart[live/_definst_]: Publish: block duplicate stream names : false
  
  2016-09-27  08:22:31  UTC   comment server  INFO    200 -   ModuleCoreSecurity.onAppStart[live/_definst_]: Publish: RTMP Authorization: password file:/usr/local/WowzaStreamingEngine/conf/publish.password
  
  2016-09-27  08:22:31  UTC   comment server  INFO    200 -   ModuleCoreSecurity.onAppStart[live/_definst_]: Play: SecureConnection: securityPlayRequireSecureConnection:false
  
  2016-09-27  08:22:31  UTC   comment server  INFO    200 -   ModuleCoreSecurity.onAppStart[live/_definst_]: Play: securitySecureTokenVersion property is missing, using SecureToken Version 1, play security enabled for RTMP only
  
  2016-09-27  08:22:31  UTC   app-start   application INFO    200 _definst_   live/_definst_
  
  2016-09-27  08:22:31  UTC   connect-pending session INFO    100 <incomming ip="ip">  -   _defaultVHost_  live    _definst_   2.975   [any]   1935    rtmp://xx.xx.xx.xx:1935/live    <incomming ip="ip">` rtmp    -   unknown 1873157588  3178    3073    -   -   -   -   -   -   -   -   -   -   -   -   -   rtmp://xx.xx.xx.xx:1935/live    -
  
  2016-09-27  08:22:31  UTC   connect session INFO    200 <incomming ip="ip">  -   _defaultVHost_  live    _definst_   2.975   [any]   1935    rtmp://xx.xx.xx.xx:1935/live    <incomming ip="ip">  rtmp    -   unknown 1873157588  3178    3073    -   -   -   -   -   -   -   -   -   -   -   -   -   rtmp://xx.xx.xx.xx:1935/live    -
  
  2016-09-27  08:22:32  UTC   create  stream  INFO    200 -   -   _defaultVHost_  live    _definst_   0.0 [any]   1935    rtmp://xx.xx.xx.xx:1935/live    <incomming ip="ip">  rtmp    -   unknown 1873157588  3297    3565    1   0   0   0   -   -   -   -   -   -   rtmp://xx.xx.xx.xx:1935/live    rtmp://xx.xx.xx.xx:1935/live    -   rtmp://xx.xx.xx.xx:1935/live    -
  
  2016-09-27  08:22:33  UTC   destroy stream  INFO    200 -   -   _defaultVHost_  live    _definst_   1.644   [any]   1935    rtmp://xx.xx.xx.xx:1935/live    <incomming ip="ip">  rtmp    -   unknown 1873157588  3347    3796    1   0   0   0   -   -   -   -   -   -   rtmp://xx.xx.xx.xx:1935/live    rtmp://xx.xx.xx.xx:1935/live    -   rtmp://xx.xx.xx.xx:1935/live    -
  
  2016-09-27  08:22:33  UTC   disconnect  session INFO    200 1873157588  -   _defaultVHost_  live    _definst_   5.198   [any]   1935    rtmp://xx.xx.xx.xx:1935/live    <incomming ip="ip">  rtmp    -   unknown 1873157588  3347    3796    -   -   -   -   -   -   -   -   -   -   -   -   -   rtmp://xx.xx.xx.xx:1935/live    -
  
  2016-09-27  08:23:34  UTC   app-stop    application INFO    200 _definst_   live/_definst_
  
  </incomming></incomming></incomming></incomming></incomming></incomming></incomming>

  So basically the server authentication is done correct but server starts the stream and stops immediately.

  Can anyone please give me some pointer to look for this error ?