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

  9 avril 2013, par falek.marcin

  I've try to add simple text on top of video with FFmpeg using drawtext parameter. Every time i'm going to do this, error is returned :

  Could not load fontface from file 'arial.ttf' : cannot open resource

  To indicate the location of the font I used the following methods :

  ffmpeg -i C:\Test\rec\vid_1321909320.avi -vf drawtext=fontfile=arial.ttf:text=test -sameq vid_1321909320.flv
  
  ffmpeg -i C:\Test\rec\vid_1321909320.avi -vf drawtext=fontfile=C:\Windows\Fonts\arial.ttf:text=test -sameq vid_1321909320.flv

  All have failed. Does anyone have experience with adding text using ffmpeg ?

  FFMPEG version: N-34549-g13b7781 build on Nov 6 2011

• Android RTSP streaming buffer size for delayed playback

  19 novembre 2012, par frijj2k

  I can access and view RTSP streams from IP cameras on Android via the VideoView component without problems.

  Now I need to play the RTSP stream with a delay (i.e. if I specify a 30 second delay, the playback on screen should be 30 seconds behind the source and the delay needs to be variable though not during playback, only at the point of connecting to the source).

  I originally thought this would not be a problem as I could simply change the RTSP buffer duration before connecting to the camera but unfortunately it seems the buffer size is baked into the firmware and cannot be changed in software. Now I have got a horrible feeling that my way forward will be to compile a version of FFMpeg for Android and somehow get the stream data out from the library, buffer it and then render it myself and I have no experience with FFMpeg.

  I am unsure how I would now go about solving this problem and any help or pointers in the right direction would be greatly appreciated.

  Update :

  Sorry I forgot to mention, the RTSP stream is being accessed over WiFi on a LAN so no huge latency issues here from going over the Internet.

• compress MP4 file using FFMPEG and PHP

  8 juillet 2017, par user2692997

  hello i am new to ffmpeg and am having trouble implementing it on my server i have managed to install it and found some code to confirm its working however i am trying to set the frame width and height but i am having no luck

  what i need help with
   change frame width n height to something like 400 by 800
   any other changes you can recommend from experience for compressing mp4 for download
   save and overwrite existing file

  this is the code i found to test ffmpeg

  extension_loaded('ffmpeg') or die('Error in loading ffmpeg');
  
  $vid = realpath('rc.mp4');
  
  $ffmpegInstance = new ffmpeg_movie($vid);
  
  echo "getDuration: " . $ffmpegInstance->getDuration() . "<br />".
  
  "getFrameHeight: " . $ffmpegInstance->getFrameHeight() . "<br />".
  
  "getFrameWidth: " . $ffmpegInstance->getFrameWidth() . "<br />".
  
  "hasAudio: " . $ffmpegInstance->hasAudio();