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• Script to make movie from images

  6 décembre 2014, par Alex TheWebGroup

  Hello I want a script or a way to make a video from images. I have a folder with a lot of pictures named randomly like "flowers.jpg", "tree.jpg", etc.

  I also have an "intro.jpg" photo which I want to add at the start of every video.

  What I want exactly is to create a video (any format, .avi etc) for a custom duration with only two photos like this :
  intro.jpg (10-20 seconds or how much i want) + tree.jpg (1 hour or how much i want)
  intro.jpg + flowers.jpg
  ...
  and so on.

  Sorry for being a newbie, but I have no clue how to accomplish this.

• ffmpeg showing wrong frame number on drawtext output

  24 février 2024, par Ricardo Bohner

  I'm using the following command to save each frame as picture with the frame number printed on it :

  


  ffmpeg -i input.mp4 -vf "drawtext=text='%{n}':fontsize=72:fontcolor=white:borderw=3:bordercolor=black" -fps_mode vfr "pics\%5d.jpg"


  


  It seems to have worked out ok, but when I go throught the pictures about at frame 930 the framecount simply restarts back to 0 and goes counting on from there again. I have tried to regenerate pts option -fflags +genpts to no avail. Any ideas ?

  


• Python script creates too short video using ffmpeg

  25 mai 2014, par Majzlik

  I use python script to create multiple pictures and call ffmpeg to create video. But there is a problem, because ffmpeg use just few pictures (about 7 - 10 from 160), but throws no error. I’ve tried the same command from commandline and video was correct. I’m calling ffmpeg this way :

  ffmpeg_call = ["ffmpeg", "-r", str(FPS), "-b", "16777216", "-y", "-i", "./sample_%05d.png", FILEOUTNAME + ".mp4"]
  
  subprocess.call(ffmpeg_call)

  and this was command in commandline :

  ffmpeg -r 25 -b 16777216 -y -i ./sample_%05d.png animation.mp4

  I’ve printed these commands to compare and they were the same, so there has to be problem in ffmpeg + python cooperation. Don’t you know, how to fix it ?

  UPDATE :

  this is log from ffmpeg :

  ffmpeg version 0.8.10-4:0.8.10-0ubuntu0.12.04.1, Copyright (c) 2000-2013 the Libav     developers
  
    built on Feb  6 2014 20:56:59 with gcc 4.6.3
  
  *** THIS PROGRAM IS DEPRECATED ***
  
  This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
  
  Input #0, image2, from '/tmp/tmpRKxT6s/ampgraph/tmp/sample_%05d.png':
  
  Duration: 00:00:00.44, start: 0.000000, bitrate: N/A
  
  Stream #0.0: Video: png, pal8, 640x480, 25 fps, 25 tbr, 25 tbn, 25 tbc
  
  Incompatible pixel format 'pal8' for codec 'mpeg4', auto-selecting format 'yuv420p'
  
  [buffer @ 0x19e18a0] w:640 h:480 pixfmt:pal8
  
  [avsink @ 0x19ee1c0] auto-inserting filter 'auto-inserted scaler 0' between the filter 'src' and the filter 'out'
  
  [scale @ 0x19e2fc0] w:640 h:480 fmt:pal8 -> w:640 h:480 fmt:yuv420p flags:0x4
  
  Output #0, mp4, to './ampgraph/animation.mp4':
  
    Metadata:
  
      encoder         : Lavf53.21.1
  
      Stream #0.0: Video: mpeg4, yuv420p, 640x480, q=2-31, 200 kb/s, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
  Press ctrl-c to stop encoding
  
  frame=   11 fps=  0 q=2.5 Lsize=      46kB time=0.44 bitrate= 859.1kbits/s    
  
  video:45kB audio:0kB global headers:0kB muxing overhead 1.906569%