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• ffmpeg thumbnailer configure trouble in CentOS6

  21 mai 2013, par Juneyoung Oh

  I am using CentOS 6.4 86x64.

  What I am planning to do is install ffmpegthumbnailer.

  I have downloaded at the link below.
  https://code.google.com/p/ffmpegthumbnailer/

  The problem is when I extract the tar.gz and command configure,

  It alway says like this.

  checking for FFMPEG... no
  
  configure: error: Package requirements (libavutil libavformat libavcodec >= 52.26.0 libswscale) were not met:
  
  
  
  No package 'libavutil' found
  
  No package 'libavformat' found
  
  No package 'libavcodec' found
  
  No package 'libswscale' found

  Of course, I already installed ffmpeg 1.2.

   /usr/lib64/libswscale.so.0.11.0
  
  /usr/lib64/libswscale.so.0

  and also have libswscale.so.

  What can I do to solve this ?

  Thanks:D

• FFMpeg- Raw compressed data to video

  21 août 2012, par p.streef

  I'm trying to use FFMpeg to create a video. So far i've been playing with a multiplexing example :
  http://ffmpeg.org/doxygen/trunk/muxing_8c-source.html, and i'm able to create a compressed video from an already existing video.

  Because my program is going to run on an embedded platform I would like to use some custom code (generated by a colleague) to compress the video data and place it into the video file.
  So I'm looking for a way to create a video file in c/c++ using ffmpeg in which i have full control over the compression part (to basically circumvent ffmpeg from doing the compression for me and inserting my own code).

  To clarify i'm planning to use this to save film from an intelligent camera into a compressed h264 mpeg-4 file.

• Library for decoding H.264 RTSP stream

  28 juillet 2015, par Saurabh Gandhi

  I was planning to decode H.264 based RTSP stream using FFMPEG in OpenCV but, when I tried so it gave some errors. Later, I found that many people have faced issues while decoding H.264 stream using ffmpeg (libavcodec). Typically the below mentioned error messages pop-up while using libavcodec :

  "[h264 @ 0xa766dd0]concealing 1200 DC, 1200 AC, 1200 MV errors"

  Has anyone used any other library successfully for decoding H.264 based RTSP. If so, which is the library (I have heard of live555 which is used within vlc player for decoding such streams). I would also like to know the output format and how it can be made compatible with OpenCV (typically within opencv we can use cvQueryFrame to directly extract a frame from a video stream, but in case we are using a library other than ffmpeg how to go about it).

  Thanks in advance.

  Regards,

  Saurabh Gandhi