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• Converting a call center recording to something useful

  9 août 2018, par Abhay

  I have a call center recording (when played it sounds gibberish) for which the mediainfo shows info as

  ion@aurora:~/Inbound$ mediainfo 48401-3405-48403--18042018170000.wav 
  
  General
  
  Complete name                            : 48401-3405-48403--18042018170000.wav
  
  Format                                   : Wave
  
  File size                                : 327 KiB
  
  Duration                                 : 4mn 11s
  
  Overall bit rate                         : 10.7 Kbps
  
  
  
  Audio
  
  Format                                   : G.723.1
  
  Codec ID                                 : A100
  
  Duration                                 : 4mn 11s
  
  Bit rate                                 : 10.7 Kbps
  
  Channel(s)                               : 2 channels
  
  Sampling rate                            : 8 000 Hz
  
  Stream size                              : 327 KiB (100%)

  The ffmpeg info shows this as

  ion@aurora:~/Inbound$ ffmpeg -i 48401-3405-48403--18042018170000.wav
  
  ffmpeg version N-91330-ga990184 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  
    configuration: --prefix=/home/ion/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/ion/ffmpeg_build/include --extra-ldflags=-L/home/ion/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/home/ion/bin --enable-gpl --enable-libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree
  
    libavutil      56. 18.102 / 56. 18.102
  
    libavcodec     58. 20.103 / 58. 20.103
  
    libavformat    58. 17.100 / 58. 17.100
  
    libavdevice    58.  4.101 / 58.  4.101
  
    libavfilter     7. 25.100 /  7. 25.100
  
    libswscale      5.  2.100 /  5.  2.100
  
    libswresample   3.  2.100 /  3.  2.100
  
    libpostproc    55.  2.100 / 55.  2.100
  
  Input #0, wav, from '48401-3405-48403--18042018170000.wav':
  
    Duration: 00:04:11.37, bitrate: 10 kb/s
  
      Stream #0:0: Audio: g723_1 ([0][161][0][0] / 0xA100), 8000 Hz, mono, s16, 10 kb/s
  
  At least one output file must be specified

  So I converted this file to PCM using

  ffmpeg -acodec g723_1 -i 48401-3405-48403--18042018170000.wav -acodec pcm_s16le -f wav outnew1.wav

  But the audio still sound gibberish , I tried many variation and only Goldwave worked but that works on windows and with GUI not cli.

  So how can I convert this file to something useful so that atleast I can listen to it , It feels like a challenge now.

  Audio file : https://drive.google.com/open?id=1T54lKaI6IJmOqTPNOA_OkYRz89EQ5F2L

  PS : Use VLC to play audio file

• Fixing a corrupted .MP4 file. which might be a 3gp file

  2 juin 2020, par Tendekai Muchenje

  I have a file called input.MP4 and it is corrupted. It's from a CCTV camera. I tried everything, ffmpeg, VLC convert, no luck. However, I used mediainfo and exiftool and extracted the following info. I am wondering if someone can figure out if I can use any of this info to fix it or convert it to a usable format. I have a copy of it here on my Google Drive

  



  mediainfo gave me this :

  



  General
Complete name                       : input.MP4
Format                              : MPEG-4
Format profile                      : 3GPP Media Release 5
Codec ID                            : 3gp5 (3gp5/3gp4/avc1/mp42/isom)
File size                           : 5.77 MiB
IsTruncated                         : Yes


  



  exiftool gave me this :

  



  ExifTool Version Number          : 10.80
File Name                        : input.MP4
Directory                        : /home/tendi/Downloads
File Size                        : 5.8 MB
File Modification Date/Time      : 2018:07:21 19:09:03-04:00
File Access Date/Time            : 2018:07:21 19:30:48-04:00
File Inode Change Date/Time      : 2018:07:21 19:30:48-04:00
File Permissions                 : rw-rw-r--
File Type                        : 3GP
File Type Extension              : 3gp
MIME Type                        : video/3gpp
Major Brand                      : 3GPP Media (.3GP) Release 5
Minor Version                    : 0.0.0
Compatible Brands                : 3gp5, 3gp4, avc1, mp42, isom
Movie Data Size                  : 5899106
Movie Data Offset                : 44


  



  Any suggestions ?

  


• 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 !!!