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• 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
  

• Add zooming and panning effect to video through command line

  10 décembre 2015, par Hamza Khan

  I Have created a video from list ofimages using ffmpeg and imagemagick. I want to add the zooming and panning effect using these two tools. Is there any specific command to to this.

• Cross dissolve with ffmpeg

  10 décembre 2015, par Merc

  I have two videos, one.mp4 and two.mp4. I want to concatenate those videos, so that the first one has a cross-dissolve with the second one when they are linked. Is this doable with ffmpeg? If so, what command shall I use?

• Overwrite a section of a video with ffmpeg

  10 décembre 2015, par Merc

  I have two videos. The first one first.mp4 is 10 seconds, the second one second.mp4 is 40 seconds. I want to use ffmpeg to overwrite the seconds 5-9 of first.mp4 with a "slice" of the second.mp4 (say the seconds 30 to 35).

  How do I achieve this with ffmpeg?

• Looking for technical details about X265 encoding and decoding

  10 décembre 2015, par Sitoumbaz

  I'am working on x265, Is there some one who can you share with me how did I encode yuv using x265 codec? I Need to know how do you get pixel encoded from picture_out structure, And can you tell me if this code is good ? Hope get solution from you! I'am using the x265 api documentation but it is less understandable.

  ret = x265_encoder_encode(encoder, pp_nal, &pi_nal, pic_in, pic_out);
  if(ret < 0){
  
      printf("encodePictureIn, Error in x265_encoder_encode %d\n",ret);
      return ret; 
  }
  
  do{
  
      ret = x265_encoder_encode(encoder, pp_nal, &pi_nal, NULL, pic_out);
      printf("...\n");
  
  }while(ret > 0);