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• Send stream from hdhomerun to AWS EC2 instance

  13 novembre 2018, par icalvete

  I’m trying something odd to get fun. Send stream from hdhomerun to AWS EC2 instance.

  First aproach. Read stream with ffmpeg
  (tested locally successfully)

  hdhomerun_config discover sya my device have ip 192.168.1.200 so I open port on my router in this way

  <my home="home" public="public" ip="ip">:5005 -> 192.168.1.200:80
  
  <my home="home" public="public" ip="ip">:5004 -> 192.168.1.200:5004
  
  </my></my>

  w3m and telnet say everything is ok.

  But...

  from EC2 instance I do

  /usr/bin/ffmpeg -y -i 'http://<my home="home" public="public" ip="ip">:5004/auto/v5057?transcode=internet240' -t 12 -vn -acodec pcm_s16le -ar 16000 -ac 1 '/tmp/test.wav'
  
  </my>

  In tuner1 I can see...

  Virtual Channel none
  
  Frequency   698.000 MHz
  
  Program Number  186
  
  Modulation Lock t8qam64
  
  Signal Strength 89%
  
  Signal Quality  100%
  
  Symbol Quality  100%
  
  Streaming Rate  none
  
  Resource Lock   <ec2 public="public" ip="ip">
  
  </ec2>

  In hdhomerun system logs...

  19700102-10:27:25 Tuner: tuner0 tuning 5057 Telecinco (t8qam64:698MHz-186)
  
  19700102-10:27:25 Tuner: tuner0 streaming http to <ec2 public="public" ip="ip">:34124
  
  </ec2>

  Everything seems ok but ffmpeg don’t get any data.

  Seccond aproach. Send stream to wowza

  I have a wowza server running in EC2 instance

  From a linux box at my home I do.

  root# /usr/bin/hdhomerun_config 1250D7B2 scan /tuner1 scan.log
  
  root# /usr/bin/hdhomerun_config 1250D7B2 set /tuner1/channel auto:651000000
  
  root# /usr/bin/hdhomerun_config 1250D7B2 get /tuner1/streaminfo
  
  root# /usr/bin/hdhomerun_config 1250D7B2 get /tuner1/program 190
  
  root# /usr/bin/hdhomerun_config 1250D7B2 set /tuner1/target rtp://<wowza server="server" public="public" ip="ip">:1935/TEST/hdhr
  
  root# echo $?
  
  root# 0
  
  </wowza>

  Ends without error buy doesn’t work
  This was a long shot but ....

  Any ideas to do this.

  Thanks !!!

• Invalid data found in the last hls segment after transcoding

  28 février 2024, par GalaDOS

  When I use ffmpeg to transcode some pure audio flv files to hls segments, the last .ts segment contains some decoding errors. It seems that it happens when the last segment's duration is short enough (about 1.5 second).

  



  Here is my transcode command :

  



  ffmpeg -i 111.flv -c:a aac -b:a 128k -f hls -hls_time 10.00 -hls_list_size 9999 tmp.m3u8


  



  And output :

  



  ffmpeg version n4.0.1-5-gb5106c5 Copyright (c) 2000-2018 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
  configuration: --prefix=/home/zx/ffmpeg_build --extra-cflags=-I/home/zx/ffmpeg_build/include --extra-ldflags='-L/home/zx/ffmpeg_build/lib -ldl' --bindir=/home/zx/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-version3 --enable-libfdk_aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libspeex --enable-libvpx --enable-libx264 --disable-shared --enable-static --disable-debug
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
Input #0, flv, from '111.flv':
  Metadata:
    major_brand     : M4A 
    minor_version   : 512
    compatible_brands: isomiso2
    date            : 2018-05-31 01:31
    encoder         : Lavf57.25.100
  Duration: 00:12:11.40, start: 0.000000, bitrate: 135 kb/s
    Stream #0:0: Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[hls @ 0x25d4280] Opening 'tmp0.ts' for writing
[mpegts @ 0x26feb80] frame size not set
Output #0, hls, to 'tmp.m3u8':
  Metadata:
    major_brand     : M4A 
    minor_version   : 512
    compatible_brands: isomiso2
    date            : 2018-05-31 01:31
    encoder         : Lavf58.12.100
    Stream #0:0: Audio: aac (LC), 48000 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc58.18.100 aac
[hls @ 0x25d4280] Opening 'tmp1.ts' for writing
[hls @ 0x25d4280] Opening 'tmp.m3u8.tmp' for writing
[hls @ 0x25d4280] Opening 'tmp2.ts' for writing
[hls @ 0x25d4280] Opening 'tmp.m3u8.tmp' for writing
[hls @ 0x25d4280] Opening 'tmp3.ts' for writing
[hls @ 0x25d4280] Opening 'tmp.m3u8.tmp' for writing
[hls @ 0x25d4280] Opening 'tmp4.ts' for writing
......
[hls @ 0x25d4280] Opening 'tmp71.ts' for writing
[hls @ 0x25d4280] Opening 'tmp.m3u8.tmp' for writing
[hls @ 0x25d4280] Opening 'tmp72.ts' for writingx    
[hls @ 0x25d4280] Opening 'tmp.m3u8.tmp' for writing
[hls @ 0x25d4280] Opening 'tmp73.ts' for writing
[hls @ 0x25d4280] Opening 'tmp.m3u8.tmp' for writing
[hls @ 0x25d4280] Opening 'tmp.m3u8.tmp' for writing
size=N/A time=00:12:11.39 bitrate=N/A speed=84.7x    
video:0kB audio:11421kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[aac @ 0x25a0580] Qavg: 567.976


  



  After transcoding, the duration of the last segment in m3u8 file is 1.39 second :

  



  ....
#EXTINF:9.984000,
tmp71.ts
#EXTINF:10.005333,
tmp72.ts
#EXTINF:1.386667,
tmp73.ts
#EXT-X-ENDLIST


  



  But when I use ffprobe to parse the last segment, I got an error :

  



  ffprobe -i tmp73.ts 
ffprobe version n4.0.1-5-gb5106c5 Copyright (c) 2007-2018 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-4)
  configuration: --prefix=/home/zx/ffmpeg_build --extra-cflags=-I/home/zx/ffmpeg_build/include --extra-ldflags='-L/home/zx/ffmpeg_build/lib -ldl' --bindir=/home/zx/bin --pkg-config-flags=--static --enable-gpl --enable-nonfree --enable-version3 --enable-libfdk_aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libspeex --enable-libvpx --enable-libx264 --disable-shared --enable-static --disable-debug
  libavutil      56. 14.100 / 56. 14.100
  libavcodec     58. 18.100 / 58. 18.100
  libavformat    58. 12.100 / 58. 12.100
  libavdevice    58.  3.100 / 58.  3.100
  libavfilter     7. 16.100 /  7. 16.100
  libswscale      5.  1.100 /  5.  1.100
  libswresample   3.  1.100 /  3.  1.100
  libpostproc    55.  1.100 / 55.  1.100
tmp73.ts: Invalid data found when processing input


  



  The input flv :

  



  http://45.76.56.248/hls_transcode_fail.flv
md5sum: 4627bbb27bcb22c143ad4dfa47359650


  



  Since my statistic module relies on the output of ffprobe, this exception will cause the entire transcoding task to fail. My temporary solution is to skip the last segment which is too short in the statistics phase. But I need a more reasonable and robust way to fix or bypass this issue. Any suggestion will be appreciated.

  


• openCV doesn't play video on Fedora 28

  2 octobre 2018, par Enes

  I have just started learn opencv and i encountered a problem about playing video. I use qt-creator for opencv and my os is fedora 28.

  My code :

  cv::VideoCapture vCap;
  
  vCap.open("/home/enes/sample.mp4");
  
  if(vCap.isOpened()){
  
      cv::Mat frame;
  
      cv::namedWindow("Video");
  
      for(;;){
  
          if(!vCap.read(frame)) break;
  
          cv::imshow("Video", frame);
  
      }
  
  }

  My problem is below.

  Failed to query video capabilities: Inappropriate ioctl for device
  
  libv4l2: error getting capabilities: Inappropriate ioctl for device
  
  VIDEOIO ERROR: V4L: device /home/enes/sample.mp4: Unable to query number of channels
  
  OpenCV(3.4.1) Error: Unspecified error (GStreamer: your gstreamer installation is missing a required plugin
  
  ) in handlemessage, file /builddir/build/BUILD/opencv-3.4.1/modules/videoio/src/cap_gstreamer.cpp, line 1869
  
  VIDEOIO(cvCreateCapture_GStreamer (CV_CAP_GSTREAMER_FILE, filename)): raised OpenCV exception:
  
  
  
  OpenCV(3.4.1) /builddir/build/BUILD/opencv-3.4.1/modules/videoio/src/cap_gstreamer.cpp:1869: error: (-2) GStreamer: your gstreamer installation is missing a required plugin
  
   in function handlemessage
  
  
  
  CvCapture_OpenNI::CvCapture_OpenNI : Failed to open input file (/home/enes/sample.mp4): Bad file extension

  What should I do to solve this problem ? Thanks.