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

[user100 at seznam.cz]

Hi,





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 
question.




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 
command: 

 

   ffmpeg -re -i "output.mpg" -vcodec libx264 -f flv "srtp://192.168.0.100:
7777?

   srtp_out_suite=AES_CM_128_HMAC_SHA1_80&srtp_out_params=NmcxMmQ2
ZjVnYjEyNmRmMTV2czY1YWR2ZjFhc2Rm"




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

        ffplay udp://192.168.0.100:7777

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







Thank you in advance