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• libx264 fails on HTTP Live Streaming (FFmpeg)

  12 juillet 2016, par shintaroid

  I want to live stream with HTTP Live Streaming, but I have problem with libx264 or maybe something other.

  My hardware and software environment :

  • Macbook Pro
  • VirtualBox with Ubuntu 16.04
  • Nginx and FFmpeg (in Ubuntu)

  I am able to stream a static video file (in Ubuntu with Nginx and FFmpeg).
  The FFmpeg command is as following :

  $ffmpeg -i /my/sample/video.mp4 -codec:v libx264 -f hls /output/file.m3u8

  But when it comes to webcam (live streaming), Mac OS Safari fails to open the stream. I used the following command :

  $ffmpeg -i /dev/video0 -codec:v libx264 -f hls /output/file.m3u8

  I guess it’s the problem of libx264 because when I use mpeg2video encoder, Mac OS Safari indeed can play the stream :

  $ffmpeg -i /dev/video0 -codec:v mpeg2video -f hls /output/file.m3u8

  I know there is a library called video4linux2, should I use video4linux2 for capturing my webcam ? But I don’t know the appropriate FFmpeg command for HTTP Live Streaming (I tried FFserver but there is error something like cannot rename hls)

  anyone shed some light on my problem ?

• libx264 fails on HTTP Live Streaming (FFmpeg)

  12 juillet 2016, par shintaroid

  I want to live stream with HTTP Live Streaming, but I have problem with libx264 or maybe something other.

  My hardware and software environment :

  • Macbook Pro
  • VirtualBox with Ubuntu 16.04
  • Nginx and FFmpeg (in Ubuntu)

  I am able to stream a static video file (in Ubuntu with Nginx and FFmpeg).
  The FFmpeg command is as following :

  $ffmpeg -i /my/sample/video.mp4 -codec:v libx264 -f hls /output/file.m3u8

  But when it comes to webcam (live streaming), Mac OS Safari fails to open the stream. I used the following command :

  $ffmpeg -i /dev/video0 -codec:v libx264 -f hls /output/file.m3u8

  I guess it’s the problem of libx264 because when I use mpeg2video encoder, Mac OS Safari indeed can play the stream :

  $ffmpeg -i /dev/video0 -codec:v mpeg2video -f hls /output/file.m3u8

  I know there is a library called video4linux2, should I use video4linux2 for capturing my webcam ? But I don’t know the appropriate FFmpeg command for HTTP Live Streaming (I tried FFserver but there is error something like cannot rename hls)

  anyone shed some light on my problem ?

• expected end of line but found unknown token

  17 juin 2017, par Denzil Williams

  Ok so after days of searching, here I am. I am new to ffmpeg, applescript, and terminal.

  I want to use ffmpeg to batch convert a group of selected files in any folder. I was successful in doing this by opening the terminal at the folder location and using this code :

  for f in *.flv; do ffmpeg -i "$f" -acodec libmp3lame -b:a 256k "${f%.flv}.mp3" && rm "$f"; done

  which finds all flv files, and converts it to 256 bit rate mp3, then deletes the original files.

  Now I want it to be more automated, so I looked into creating a service. I tried running an apple script through automator, which I want it to open the terminal at the folder location the file then run the code to convert the files. Here’s the code I attempted :

  tell application "Finder" to set currentFolder to target of front Finder window as text
  
  set theWin to currentFolder's POSIX path
  
  
  
  tell application "Terminal"
  
      if not (exists window 1) then reopen
  
      activate
  
      do script "cd " & quoted form of theWin & ";clear" in window 1
  
      tell application "Terminal"
  
          do script "for f in *.flv; do ffmpeg -i "$f" -acodec libmp3lame -b:a 256k "${f%.flv}.mp3" && rm "$f"; done"
  
      end tell
  
  end tell

  The first part of code opens up terminal at the folder location just fine. But when I add the part with the ffmpeg code it crashes. The error is apparently with the "$", those are what light up as the error, the error message says "Expected end of line, but found unknown token". Looking for some assistance please. I need the "$" because those are what make the loop work for renaming the files and such.