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• RED5 1.0.2 recorded FLV convert to Mobile/HTML5 format with FFMPEG av out of sync

  14 août 2014, par Daew dawe

  I have problem with recorded video in Red5 v1.0.2 (i had issues with previous v1, it does not recorded any video, with 1.0.2 it works). When I record flv I want to convert it to some mp4. But I have problem with settings, because every time there is some issue with quality/audio sync. Can u please help me how to convert with ffmpeg (in future automatic process on server).

  Second problem is that in flash client buffer length is always 0, but in v0.8 it was filled and on end I waited until empty, here I’m not sure how long should I wait. I founded this url http://code.google.com/p/red5/issues/detail?id=312 where they said to wait until i get UnPublish.Success, but that event I got only after ns.close()

  My flash client record settings is (FP10) :

  video :

  • resolution = 640x360
  • fps = 30
  • keyframeinterval = 15
  • video quality = 90
  • bandwidth = 0

  audio :

  • microphone codec = SPEEX
  • encodeQuality = 9

  • silencelevel = 0

  • bufferTime = 15

  recorded video parameters in VLC (translated from czech to english) :

  video

  • Codec : Flash Video (FLV1)
  • Resolution : 640x360
  • format : Planar 4:2:0 YUV

  audio

  • codec : Speex Audio (spx )
  • frequency : 16000Hz
  • bits per sample : 16
  • data flow : 16 kb/s

  FFMEPG info about video :

   Metadata:
  
     server          : Red5 Server 1.0.2 Rev: 4616
  
     creationdate    : Mon Sep 02 23:17:08 CEST 2013
  
     canSeekToEnd    : true
  
   Duration: 00:00:33.24, start: 0.000000, bitrate: 645 kb/s
  
     Stream #0:0: Video: flv1, yuv420p, 640x360, 625 kb/s, 1k tbr, 1k tbn, 1k tbc
  
  
  
     Stream #0:1: Audio: speex, 16000 Hz, mono, s16, 16 kb/s

  bsplayer showing 25fps - but I recorded 30fps, I dont understand this so much.

  what I tried with ffmpeg (I’m ffmpeg newbie).

  First I recorded 33sec long video

  when I convert audio with command : ffmpeg -i test.flv -ar 44100 -ab 160k -ac 1 output.mp3 , then the audio have only 30sec

  I tried this commands, but no one with good solution

  ffmpeg -i test.flv -vcodec mpeg4 -acodec libvo_aacenc output.mp4
  
  
  
  ffmpeg -i test.flv -acodec libvo_aacenc -aq 200 outputsss.mp4
  
  
  
  ffmpeg -i test.flv -c:v libvpx -c:a libvorbis output.webm // here is sound synced good - but sound have repeating silence lags (every 1-2s)

  really thank you for your help, I’m fighting with conversion many days :(

• Recording audio with FFMPEG works in terminal but not through exec() of PHP

  8 août 2013, par lucasalmeida92

  I use this command to RECORD audio and video from my webcam in terminal and it works !

  ffmpeg -f video4linux2 -r 25 -sameq -s 640x480 -i /dev/video0 -f alsa -i plughw:0,0 -ar 22050 -ab 128k -y webcam.flv

  But when I do it through PHP, like this :

  echo shell_exec('ffmpeg -f video4linux2 -r 25 -sameq -s 640x480 -i /dev/video0 -f alsa -i plughw:0,0 -ar 22050 -ab 128k -y webcam.flv 2>&1 &') ;

  I receive that log :

  ffmpeg version 0.8.6-4:0.8.6-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav developers built on Apr 2 2013 17:02:36 with gcc 4.6.3 * THIS PROGRAM IS DEPRECATED * This program is only provided for compatibility and will be removed in a future release. Please use avconv instead. [video4linux2 @ 0x23579a0] Estimating duration from bitrate, this may be inaccurate Input #0, video4linux2, from '/dev/video0' : Duration : N/A, start : 4868.729067, bitrate : 122880 kb/s Stream #0.0 : Video : rawvideo, yuyv422, 640x480, 122880 kb/s, 25 tbr, 1000k tbn, 25 tbc Home directory /var/www not ours.

  ALSA lib pcm_hw.c:1401 :(_snd_pcm_hw_open) Invalid value for card [alsa @ 0x23589e0] cannot open audio device plughw:0,0 (No such file or directory) plughw:0,0 : Input/output error

  Before I got that Mic device problem I was having problem with the Webcam device's permissions, then i did :

      sudo chmod -R 777 /dev/video0

  And the video capture was ready to be used ! But now I got this Mic device problem !

  I think it can be about permissions too, but I dont know linux very well and have no idea how to fix that !

  Thanks !

  ---

  I just found the solution ! =x

  sudo chmod -R 666 /dev/snd/*

• build : Add support for travis CI

  13 août 2015, par Federico Tomassetti

  build : Add support for travis CI
  It is useful to support a future staging branch and to have an
  
  automated consistency check on github pull requests.
  

  • [DBH] .travis.yml