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• Prevent libavformat (FFmpeg) from adding "ENCODER" tag to output / stripping tags

  1er mars 2014, par Wyatt8740

  I made a bash script that transfers audio or video metadata from one file to another, regardless of media container format, via FFMpeg. My problem is that FFMpeg consistently adds a 'ENCODER' tag.

  Example :

  Before running through FFMpeg :

   File : track01.cdda.flac

    Metadata:
  
      ALBUM           : Wish You Were Here
  
      ARTIST          : Pink Floyd
  
      COPYRIGHT       : 1975 Harvest Records
  
      DATE            : 1975
  
      GENRE           : Experimental Rock
  
      TITLE           : Shine On You Crazy Diamond
  
      track           : 1

  After running through FFMpeg :

   File : track01-iphone-alac.m4a

    Metadata:
  
      ALBUM=Wish You Were Here
  
      ARTIST=Pink Floyd
  
      COPYRIGHT=1975 Harvest Records
  
      DATE=1975
  
      GENRE=Experimental Rock
  
      TITLE=Shine On You Crazy Diamond
  
      track=1
  
      ENCODER=Lavf55.12.100

  So really, I want to either force FFMpeg to not add the 'ENCODER' tag, or I want to strip that tag off afterwards. Is there a way to do this ? I really don't want to spend hours trying to compile FFMpeg again on my Pentium 4 HT - the only working computer I have at the moment. I'd prefer not to have to use another program unless it's related enough to FFMpeg or MPlayer/Mencoder that I won't have to install anything new if I have those installed.

• how to pass arguments to existing process instance in c#

  28 octobre 2013, par Akash Langhani

  I am using ffmpeg and I have start a process and I want to pass an argument to same instance after its start, so how to do this in c sharp any resource. Basically I am using ffmpeg to recored desktop screen and ffmpeg recording can be stop with "q" word.

• How can I automatically embed commit information into a subtitles file that I'm tracking ?

  23 février 2015, par microspace

  I use git to track *.ass subtitle files.
  Here is example of *.ass file :

  [Script Info]
  
  ; Script generated by Aegisub 3.1.2
  
  ; http://www.aegisub.org/
  
  Title: Default Aegisub file
  
  ScriptType: v4.00+
  
  
  
  [V4+ Styles]
  
  Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour,    BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
  
  Style: Default,Arial,20,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,0,0,0,0,100,100,0,0,1,2,2,2,10,10,10,1
  
  Style: titr,DejaVu     
  
  
  
  Sans,20,&H007DDBFA,&H000000FF,&H00000000,&HFF000000,0,0,0,0,100,100,0,0,1,2,2,1,10,10,10,1
  
  
  
  [Events]
  
  Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
  
  Dialogue: 0,0:00:00.46,0:00:11.22,Default,,0,0,0,,Если это можно было бы
  
  Dialogue: 0,0:00:03.44,0:00:08.96,titr,,0,0,0,,{\pos(20,240)\fad(600,600)}бывший министр

  After commit I burn subtitles into video :

  ffmpeg -i video.avi -vf "ass=subtitle.ass" out.avi

  My goal is to show commit date for 10 second at the start of movie. This should be done automatically.

  1) It can be easily done with by modifying subtitle.ass itself, but I can’t do it after commit and there are other reasons.

  2) It can be done by ffmpeg from command line : How to use ffmpeg to add a text to avi video ?

  Problem is that in this case text will be shown for the whole lenght of movie.

  3) I can copy *.ass file to temporary directory, insert date, render and delete *.ass file.

  Is there a simpler way ?