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• Pipe yuv frames to ffmpeg

  6 décembre 2012, par ashrack

  I read camera input frames and then do some transformation on them and then I would like to make a video of it.
  At the moment I am writing the raw yuv420 images to sdcard as one big file and then invoking staticly compiled FFMPEG to encode it to mp4 movie.

  The problem is because writing 10 images per second results in about 2MB/s of write to SDCARD for an image of 480x320 in yuv420p format. Which is too much for an SDCARD.

  So would it be possible to pipe these yuv420 images directly to FFMPEG and how ?

• phpvideotoolkit class errors on xampp installed on windows server 2008

  6 mars 2016, par Sourabh Swarnkar

  find i m trying to convert sequence of images into a video. and for that i canme to know about the ffmpeg class.

  the only wrapper class that i found is phpvideotoolkit but i m not able to work with it.

  i installed phpvideotoolkit on xampp on my windows 2008 server . but it is throwing alor of errors

  This example shows you how to extract a specific frame from a movie.
  
  
  
  
  
  Notice: Undefined property: PHPVideoToolkit::$_tmb_directory in C:\xampp\htdocs\phpvideo\phpvideotoolkit.php5.php on line 869
  
  
  
  Notice: Undefined offset: 0 in C:\xampp\htdocs\phpvideo\phpvideotoolkit.php5.php on line 877
  
  PHPVideoToolkit Error: Execute error. Output for file "C:\xampp\htdocs\phpvideo\examples\working\to-be-processed\MOV00007.3gp" was not found. No images were generated.
  
  
  
  Notice: Undefined property: PHPVideoToolkit::$_tmb_directory in C:\xampp\htdocs\phpvideo\phpvideotoolkit.php5.php on line 869
  
  
  
  Notice: Undefined offset: 0 in C:\xampp\htdocs\phpvideo\phpvideotoolkit.php5.php on line 877
  
  PHPVideoToolkit Error: Execute error. Output for file "C:\xampp\htdocs\phpvideo\examples\working\to-be-processed\Video000.3gp" was not found. No images were generated.
  
  
  
  Notice: Undefined property: PHPVideoToolkit::$_tmb_directory in C:\xampp\htdocs\phpvideo\phpvideotoolkit.php5.php on line 869
  
  
  
  Notice: Undefined offset: 0 in C:\xampp\htdocs\phpvideo\phpvideotoolkit.php5.php on line 877
  
  PHPVideoToolkit Error: Execute error. Output for file "C:\xampp\htdocs\phpvideo\examples\working\to-be-processed\cat.mpeg" was not found. No images were generated.

  example

  PHPVideoToolkit Error: Execute error. Output for file "C:\xampp\htdocs\phpvideo\examples\working\tmp\1336156630-4fa421d69357d\tmp_%d.jpg" was not found. Please check server write permissions and/or available codecs compiled with FFmpeg. You can check the encode decode availability by inspecting the output array from PHPVideoToolkit::getFFmpegInfo().

  i m trying to make it work since last many hours but no luck

  Also, for this code :

  $srcFile = "test-mpeg.mpg";
  
  $ffmpegObj = new ffmpeg_movie($srcFile);

  i am gettign error that it cant file the file. i believe its something to do with permissions but i m not able to figure out

  fpoen , fwrite , file_put_contents all are working fine without any permissions problems.

  can anyone please guide me in the write direction. what do i need to do to make this phpvideotoolkit work

• Linker errors when trying to enable FFmpeg stagefright support

  6 mai 2012, par vitakot

  I want to use stagefright for HW accelerated decoding in my Android movie player
  based on FFmpeg - version 0.10.2 "Freedom". I have successfully built all the
  libraries using the build script in tools directory. However, I have many linker
  errors related to stagefright e.g. :

  undefined reference to android::OMXClient::disconnect()
  
  undefined reference to android::MediaBuffer::MediaBuffer(unsigned int)

  I thought the binaries built with stagefright support are self-contained and do
  not need any other stuff to link with. Am I doing something wrong ? Should I add
  libstagefright.so to my project ? I think it would cause many troubles with
  compatibility...

  Is it compatible with API 8 or only API 9 and above ?

  Many thanks,
  Vita