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• Video stream played very late on wowza server from ffmpeg when Stream starts at the beginning

  30 mai 2013, par tulsi

  Form ffmpeg i fired some command to run video on wowza server

  ffmpeg -i /home/Downloads/GAmUk.mp4  -f mpegts udp:/ip:10000/live/test.stream

  and streaming is running as well only problem is latency not so good its played after long time on server please help me to play fast

• web recorded video not played in ipad

  30 juin 2015, par ketan

  I record video from web using flash media server. Now using flex default player i tried to play video but, it will not play ipad.(ios device)
  I checked that video codec and it is something like following :

  libxavs --enable-libxvid --enable-decklink --enable-zlib
  
    libavutil      52. 92.100 / 52. 92.100
  
    libavcodec     55. 69.100 / 55. 69.100
  
    libavformat    55. 45.100 / 55. 45.100
  
    libavdevice    55. 13.102 / 55. 13.102
  
    libavfilter     4. 10.100 /  4. 10.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 19.100 /  0. 19.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  [flv @ 0000000002b60220] Stream discovered after head already parsed
  
  Input #0, flv, from 'C:\Users\Administrator\Desktop\123654789.flv':
  
    Metadata:
  
      canSeekToEnd    : false
  
      createdby       : FMS 4.5
  
      creationdate    : Tue Jun 30 16:27:22 2015
  
    Duration: 00:00:15.25, start: 0.000000, bitrate: 52 kb/s
  
      Stream #0:0: Video: flv1, yuv420p, 320x227, 1k tbr, 1k tbn, 1k tbc
  
      Stream #0:1: Audio: speex, 16000 Hz, mono, s16, 20 kb/s
  
      Stream #0:2: Data: none

  I record video following ways :

  netstream.publish("FILENAME","record");

  Thanks.

  Edit :

  Another flv file i got which is played in ios. But when i check it’s codec it something like following :

  r --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab -
  
  -enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
  
  --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-
  
  libxavs --enable-libxvid --enable-decklink --enable-zlib
  
    libavutil      52. 92.100 / 52. 92.100
  
    libavcodec     55. 69.100 / 55. 69.100
  
    libavformat    55. 45.100 / 55. 45.100
  
    libavdevice    55. 13.102 / 55. 13.102
  
    libavfilter     4. 10.100 /  4. 10.100
  
    libswscale      2.  6.100 /  2.  6.100
  
    libswresample   0. 19.100 /  0. 19.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  Input #0, flv, from 'C:\Users\Administrator\Desktop\16402.flv':
  
    Metadata:
  
      major_brand     : 3gp4
  
      minor_version   : 0
  
      compatible_brands: isom3gp4
  
      encoder         : Lavf55.45.100
  
    Duration: 00:00:13.23, start: 0.000000, bitrate: 304 kb/s
  
      Stream #0:0: Video: flv1, yuv420p, 320x240, 300 kb/s, 15 fps, 15 tbr, 1k tbn
  
  , 1k tbc
  
      Stream #0:1: Audio: mp3, 22050 Hz, mono, s16p, 0 kb/s

  How, can i record/convert flv like below ?

• Video has no audio when played using HTML5

  4 mai 2013, par vertigoelectric

  I have a media site where I can upload video files. After upload, they are converted to MP4 using ffmpeg and then ffmpeg2theora converts that to OGV.

  I have recently discovered that some videos that I upload do not play any sound when using the HTML5 player in Firefox/Chrome, but do have sound when using the fallback Flash player in IE.

  I've downloaded and checked the processed files and they both still have sound, so the issue seems to be related to the HTML5 player rather than loss of audio during processing.

  I double-checked my ffmpeg command line and realized I didn't specify any audio options :

  ffmpeg2 -i "inputfile" -vcodec libx264 -profile:v baseline -level 3 "outputfile" 2>&1'

  Since only some of the files didn't play audio while some did, this led me to believe that the audio track was being copied directly during the processing and if the original file didn't have audio supported by HTML5, then it output file would have the same result.

  I realized this means I have to force re-encoding of the audio stream, so I tried a few things but had no success with any.

  I tried 'libfaac' as many online posts suggested, but this resulted in an 'unknown codec' error. Further reading led me to find that 'libfaac' was no longer included with ffmpeg builds. I must have gotten mine after that.

  I tried the "Native AAC" codec by simply using the following options :

  ffmpeg2 -i "inputfile" -vcodec libx264 -profile:v baseline -level 3 -acodec aac "outputfile" 2>&1'

  With this I got the following error : "Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height".

  The only codec that didn't give me some sort of error was 'libvo_aacenc'. However, even though the processing completed without error, I still got no audio when played in the HTML5 player.

  What am I doing wrong ?

  NOTE (just in case this is relevant) : This is currently being run on a Windows host using the ffmpeg executable, but we will soon be moving to a Linux host.