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• ffmpeg not using wildcard properly from batch script

  20 mars 2013, par Paul Green

  What I want to do is actually super simple and is working just fine if executed from within the cmd window, though it does not work when used within a batch script. The following command would normally get all .png files with the pattern anim_xxxx.png (%04d stands for 4 numbers in ffmpeg).

  ffmpeg -f image2 -i anim_%04d.png -vcodec mjpeg -q:v 0 -r 25 foo.avi

  Now the error I get is with the wildcard for my image sequence and I have no clue what the problem is. Using another wildcard like * gives me the same error.

  [image2 @ 000000000033e8c0] Could find no file with with path
  'anim_render.bat4d.png' and index in the range 0-4
  anim_render.bat4d.png : No such file or directory

  does %04d resemble any variable in a batch file that does not exist outside of batch files ? I could not find any similar cases so far.

• Fix min/max validation. Closes gh-666. Fixes #648

  20 mars 2013, par ekonijn

  Fix min/max validation. Closes gh-666. Fixes #648
  In 1.10.0, min/max validation was supported for input type="text",
  
  where min/max were interpreted as numbers.  This means min/max
  
  for date would not work : min="2012-02-13" was interpreted as min="Not a Number".
  In 1.11.0, min/max were no longer converted to numbers.  This means
  
  min/max for dates worked, but min/max for numbers failed :
  
  "50" < "150" < "1000" does not hold.
  For an example, see http://jsbin.com/awokex/3
  This commit makes the behaviour of min/max dependent on input type :
   * input type=text (or not type attribute) has numeric min/max, as in 1.10.0
  
   * input type=date has working min/max for type date ;
  
     on mobile browsers you also get a date picker,
  
     plus the browser may reject invalid dates before
  
     javascript gets a chance to complain.
  
   * input type=number or range get numeric min/max,
  
     plus numeric keypad or slider on mobile browsers,
  
     plus browser may reject invalid input before javascript
  
     gets a chance to complain
  Allowing use of min/max with type=number/range/date is important
  
  for mobile browsers, where the numeric keypad or date picker
  
  make the input much easier to use than a generic text input field.
  
  In this situation jquery-validate remains necessary to support
  
  older browsers that do not do input validation based on type
  
  and min/max.
  For situations where numeric input should be validated by jquery
  
  without giving the browser a chance to validate the input format,
  
  input type=text in combination with min/max can be used, as in 1.10.0.
  

• Problem with ffmpeg function avformat_seek_file()

  19 avril 2013, par Kael

  I am trying to seek the given frame in the video using ffmpeg library. I knew that there is av_seek_frame() function but it was recommended to use avformat_seek_file()instead. Something similar mentioned here. I know that avformat_seek_file() can't always take you to exact frame you want, but this is ok for me. I just want to jump to the nearest keyframe. So i open the video, find videostream and calling it like this :
  avformat_seek_file( formatContext, streamId, 0, frameNumber, frameNumber, AVSEEK_FLAG_FRAME ). It always returns 0, so i understand it as correct finish. However, it doesn't work as it should to. I check byte position like here before and after calling avformat_seek_file(). Actually it changes, but it changes always in the same way whenever i'm trying to put different target frame numbers ! I mean that byteposition after this call is always same even with different frameNumber values. Obviously, i'm doing something wrong but i don't know what exactly. I don't know if it does matter but i'm using .h264 files for that. I tried different flags, different files, using timestamps instead of frames, flushing buffers before and after and so on but it doesn't work for me. I will be very grateful if someone could show me what is wrong with it.