[FFmpeg-user] log file size limitation and motion detection algorithm

user100 at seznam.cz user100 at seznam.cz
Mon Mar 10 16:50:13 CET 2014


I have 3 different questions.

1. Is there any possibility to set the size of the log file? I have a ffmpeg
command that 

   captures webcam input and stderr is redirected to the file. 

   Size of this file will increase endlessly and it is a problem. So far I 
have used pipes 

    to solve this problem, but I would like to know the answer to my 

2. How does the filter select-scene count the scenes changes?  I know it

    compares new and old frame, but how?

     ffmpeg -i input.avi  -f mpeg outpu.mpg  -vf "select='gt(scene\,0.4)'" -
f null


3. I have tried to use SRTP protocol to encrypted my stream using this 


   ffmpeg -re -i "output.mpg" -vcodec libx264 -f flv "srtp://


   Have I missed something? Because I can play the stream with this command:

        ffplay udp://

   without problems. I guess it wouldn´t be possible, because stream would 
be encrypted.

Thank you in advance

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