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• Add file name to video (drawtext) - Cannot find a valid font for the family Sans Error Ffmpeg [duplicate]

  18 mars 2019, par Oli Shingfield

  This question already has an answer here :

  • FFmpeg drawtext - Could not load fontface from file [closed]
    
    4 answers
    

  I have a folder with a couple of short videos in, I would like to add the file names of the videos in the video in the bottom right corner while converting them from mov to mp4. I have tried using :

      @echo off
  
  set "INPUT=E:\Users\Oli Shingfield\Documents\Projects\v1.3.1\downloads3"
  
  for %%a in ("%INPUT%\*.mov") do (
  
      ffmpeg -i "%%~a" -vf drawtext=text="%%~na":x=105:y=120:fontfile="E:\Users\Oli Shingfield\Documents\Projects\v1.3.1\downloads3\impact.ttf":fontsize=25:fontcolor=white -b:v 1M -r 60 -b:a 320k -ar 48000 -crf 17 "%%~na.mp4"
  
  )
  
  pause

  but I am getting the error :

  [Parsed_drawtext_0 @ 000002548db70e00] Cannot find a valid font for the family Sans
  
  [AVFilterGraph @ 000002548cd00a20] Error initializing filter 'drawtext' with args 'text=RP AS A WHOLE:x=105:y=120:fontfile=E:UsersOli_ShingfieldDocumentsProjectsv1.3.1downloads3impact.ttf:fontsize=25:fontcolor=white'
  
  Error reinitializing filters!
  
  Failed to inject frame into filter network: No such file or directory
  
  Error while processing the decoded data for stream #0:0
  
  [aac @ 000002548be61ae0] Qavg: 65536.000
  
  [aac @ 000002548be61ae0] 2 frames left in the queue on closing
  
  Conversion failed!

  It seems as though it can’t find the font file even though it’s in the same location and I am specifying the exact file path.

  Has anyone got any ideas ? I’m baffled.

  Thanks !
  Oli

• Changing the background color of the movie while using tpad and adelay

  1er août 2019, par S.T

  i want to change the background color of a movie while using tpad and adelay commands. it is now black ( until the movie starts).

  the command i tried listed below, and i don’t know how to change the color while the movie is in it’s delay ( probably something with the tpad that needs to be change).

   -filter_complex [0:v]scale=1920:1080,tpad=start_duration=5[v];
  
    [0:a]adelay=5s|s[a] -map [v] -map [a] -b 6000k

  the 5 seconds that the movie is in its "waiting mode" needs to be changed from default black to some other color. Thanks.

• Creating a movie with Bullet Physics

  27 novembre 2012, par Sara

  I am trying to make a movie from my bullet demo. To do that, I want to store an image every timestep, and create a movie using ffmpeg.

  I need the simulation to advance only one step at a time. For that, I am doing

  m_dynamicsWorld->stepSimulation(0.005,0);

  And after that, I store the scenario (I later create an image of the scenario). At the end of the animation, I am creating a movie using as timestep 200 fps (1/0.005). This should give me the real time animation, but instead the animation is a little bit slow.

  Any ideas ?