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• Avoid corrupting diagnostic state with _Pragma changes.

  4 novembre 2017, par Dale Curtis

  Avoid corrupting diagnostic state with _Pragma changes.
  The macros for ICC and MSVC correctly push and pop the diagnostic
  
  state of the compiler when disabling deprecation warnings. The
  
  ones for clang/gcc should do the same. Without this, if a blanket
  
  deprecation warning is applied to the code base it'll be flipped
  
  back on incorrectly with FF_ENABLE_DEPRECATION_WARNINGS.
  Signed-off-by : Dale Curtis <dalecurtis@chromium.org>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavutil/internal.h

• Audio gets removed while converting mp4 to intermediate state for concatenation using ffmpeg

  6 décembre 2017, par pranav mutharia

  When I use the following command -

  ffmpeg -i input.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts intermediate1.ts

  the audio from the given input mp4 file gets automatically removed.
  I am running this from a python sub-process.
  I want to retain the audio from the original file.

  The mp4 is an output of the following mencoder command

  mencoder -ss start-time -endpos end-time -oac pcm -ovc copy original.mp4 -o input.mp4

  The log is as follows :

  `

  Input #0, avi, from '/home/pranav/Desktop/video/video_module_05-06-2017/temp/072147_1mp4test1.mp4':
  
    Metadata:
  
      encoder         : MEncoder 1.2.1 (Debian), built with gcc-5.3.1
  
    Duration: 00:00:03.04, start: 0.000000, bitrate: 1440 kb/s
  
      Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(tv), 640x268 [SAR 1:1 DAR 160:67], 32 kb/s, 24 fps, 24 tbr, 24 tbn, 48 tbc
  
      Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
  
  Output #0, mpegts, to '/home/pranav/Desktop/video/video_module_05-06-2017/temp/072147_1mp4intermediate1.ts':
  
    Metadata:
  
      encoder         : Lavf56.40.101
  
      Stream #0:0: Video: h264 (H264 / 0x34363248), yuv420p, 640x268 [SAR 1:1 DAR 160:67], q=2-31, 32 kb/s, 24 fps, 24 tbr, 90k tbn, 24 tbc
  
      Stream #0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, stereo, 1411 kb/s
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (copy)
  
    Stream #0:1 -> #0:1 (copy)
  
  Press [q] to stop, [?] for help
  
  frame=   73 fps=0.0 q=-1.0 Lsize=     599kB time=00:00:03.04 bitrate=1612.5kbits/s    
  
  video:12kB audio:517kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 13.229376%
  
  ffmpeg version 2.8.11-0ubuntu0.16.04.1 Copyright (c) 2000-2017 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --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-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --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-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
    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
  
  Guessed Channel Layout for  Input Stream #0.1 : stereo

  `

• Systemd service (python loop -> ffmpeg stream)

  7 janvier 2019, par Kevitto

  I am currently running a stream with ffmpeg, through icecast2 through a python snippet (Fig1). I have created a systemd service to run said python script on boot (Fig2) and use a custom target (Fig3) to make sure it loads once every other service is loaded, mostly for icecast2.

  I’ve conducted multiple tests, and the stream works fine if launched either from the python code or if I restart the service attached to it.

  My problem is, on a (re)boot of the system, the service runs for approximately 15 seconds, then the stream dies. I’ve read so much on python and systemd, but I can’t for the life of me figure out where the problem lies. I’ve tried changing my python code, the unit load order and anything else I found online that could help, but found nothing.

  Fig1 (dxstream.py)

  import sys
  
  import time
  
  import subprocess
  
  
  
  def start():
  
      return subprocess.Popen(r’ffpmeg -re -f alsa -ac2 -i hw:1,0 -acodec mp3 -ab 320k -f mp3 icecast://sourcehackme@localhost:8000/stream', shell=True)
  
  
  
  testProcess = start()
  
  
  
  while True:
  
  
  
      res = testProcess.poll()
  
      if res is not None:
  
          testProcess = start()
  
      time.sleep(1)

  Fig2 (dxstream.service)

  [Unit]
  
  Description=ffmpeg stream starter
  
  After=multi-user.target
  
  [Service]
  
  Type=idle
  
  Execstart=/usr/bin/python /usr/local/bin/dxstream.py
  
  Restart=on-failure
  
  
  
  [Install]
  
  WantedBy=custom.target

  Fig3 (custom.target)

  [Unit]
  
  Description=Custom Target
  
  Requires=multi-user.target
  
  After=multi-user.target
  
  AllowIsolate=yes