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• Merge commit '37f573543c4fd7f44339e04d8d15b95118493ddd'

  28 octobre 2017, par James Almer

  Merge commit '37f573543c4fd7f44339e04d8d15b95118493ddd'
  * commit '37f573543c4fd7f44339e04d8d15b95118493ddd' :
  
    swscale : Convert the check check_image_pointers helper to a macro
  [14:52:50] <jamrial> michaelni, ubitux : 37f573543c yay or nay ? we don't have the warnings mentioned there because we cast the argument
  
  [14:54:10] <@ubitux> i don't really see the improvement, no opinion
  
  [15:04:14] <michaelni> jamrial, functions are better/cleaner than macros
  
  [15:04:20] <michaelni> IMHO that is
  This commit is a noop.
  Merged-by : James Almer <jamrial@gmail.com>
  

• How do I cut the last 10 seconds from mpeg using ffmpeg (and applescript etc) [closed]

  10 décembre 2015, par EvGeniy Ilyin

  I have many different mpeg files. In every mpeg file are credits at the end of the video. I need to cut it. How I can do it for bath(list) ?
  for example :

  ffmpeg -i my.mp4 -vcodec copy -acodec copy -ss 00:10:10 my_cute.mp4

  but every mpeg file has different duration...
  Is there a way to specify the indent from the end ?

  my answer
  using applescript organizing logic
  main parameters : the length of the titles and file folder

  1. to draw up a list of specified path mp4 files
  2. cycles through each file
     1. using ffprobe obtain data in xml with a total length video
     2. parse xml, we obtain the duration of the
     3. using ffmpeg, knowing the total duration of the video and the length of the credits at the end - set the new duration

  -- settings
  
  set titresDuration to 54.0
  
  set folderPath to "/Users/-/Downloads/-.XviD.SATRip.Thunder"
  
  
  
  set filesList to my filesInFolder(folderPath, true, ".mp4")
  
  repeat with fileName in filesList
  
      set videoDuration to my videoDurationOfFile(fileName)
  
      set fileCutName to do shell script "echo '" & fileName & "' | sed 's/\\.mp4/c\\.mp4/g'"
  
      if videoDuration > titresDuration then
  
          set videoDurationWithoutTitres to videoDuration - titresDuration
  
          set videoDurationWithoutTitres to my numberToString(videoDurationWithoutTitres)
  
          set ffmpegScript to "/usr/local/bin/ffmpeg -y -i " & quoted form of fileName & " -t " & videoDurationWithoutTitres & " -c copy " & quoted form of fileCutName
  
          set info to do shell script ffmpegScript
  
      end if
  
  end repeat
  
  log "the end"
  
  
  
  
  
  
  
  -- helpers methods
  
  on videoDurationOfFile(fileName)
  
      set probeScript to "/usr/local/bin/ffprobe -v quiet -print_format xml -show_format " & quoted form of fileName
  
      set videoTags to do shell script probeScript --"/usr/local/bin/ffprobe -v quiet -print_format xml -show_format " & fileName
  
      set videoDuration to 0.0
  
      tell application "System Events"
  
          set xmlData to make new XML data with properties {name:"xmldata", text:videoTags}
  
          set xmlFFprobe to XML element "ffprobe" of xmlData
  
          set xmlFormat to XML element "format" of xmlFFprobe
  
          set attrs to value of XML attribute "duration" of xmlFormat
  
          set attrs to do shell script "echo '" & attrs & "' | sed 's/[0]*$//g'"
  
          set attrs to do shell script "echo '" & attrs & "' | sed 's/\\./,/g'"
  
          set videoDuration to attrs as real
  
      end tell
  
      return videoDuration
  
  end videoDurationOfFile
  
  
  
  on numberToString(this_number)
  
      set this_number to this_number as string
  
      set this_number to do shell script "echo '" & this_number & "' | sed 's/,/\\./g'"
  
      if this_number contains "E+" then
  
          set x to the offset of "." in this_number
  
          set y to the offset of "+" in this_number
  
          set z to the offset of "E" in this_number
  
          set the decimal_adjust to characters (y - (length of this_number)) thru ¬
  
              -1 of this_number as string as number
  
          if x is not 0 then
  
              set the first_part to characters 1 thru (x - 1) of this_number as string
  
          else
  
              set the first_part to ""
  
          end if
  
          set the second_part to characters (x + 1) thru (z - 1) of this_number as string
  
          set the converted_number to the first_part
  
          repeat with i from 1 to the decimal_adjust
  
              try
  
                  set the converted_number to ¬
  
                      the converted_number & character i of the second_part
  
              on error
  
                  set the converted_number to the converted_number & "0"
  
              end try
  
          end repeat
  
          return the converted_number
  
      else
  
          return this_number
  
      end if
  
  end numberToString
  
  
  
  on filesInFolder(folderPath, lookInSubfolders, filter)
  
      set filesList to {}
  
      tell application "System Events" to set filesList to POSIX path of (files of folder folderPath whose name contains filter)
  
      if lookInSubfolders then
  
          tell application "System Events" to set subfoldersList to POSIX path of (folders of folder folderPath)
  
          repeat with subfolderPath in subfoldersList
  
              set subfilesList to my filesInFolder(subfolderPath, true, filter)
  
              repeat with subfile in subfilesList
  
                  set end of filesList to subfile
  
              end repeat
  
          end repeat
  
      end if
  
      return filesList
  
  end filesInFolder

• Casting a mp2t stream to Chromecast

  31 juillet 2017, par Tiago Ferreira

  I’m developing a project where I receive data from an external mp2t stream in a node.js app and I’m trying to cast it to a chromecast device using the castv2-client package setting the contentType attribute to "video/mp2t" but it’s not working.

  If I convert the stream to an mp4 file using ffmpeg I can cast the video, but it stutters a lot given the fact that on each chunk of video received, it has to convert it.

  Is there any way I can cast the mp2t video directly as I receive it ?