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• How to do real-time video streaming frame by frame in python ?

  4 septembre 2018, par Leo

  What I need is to readin one frame of a video, then send this frame as a frame in video, like P-frame, to the server, and server decode it based on the information of the frames it received before this frame.(So only the first frame is sent as complete I-frame, the rest are just P-frame to save bandwidth)

  Then I need to do some real time operation on this frame.

  But I try ffmpeg’s and opencv’s built in streaming protocal, it can only save a complete video file. But I need to do some real time manipulate as soon as I receive one fram, so I cant wait till I have received the whole file.

  So what package should I use ? Or there is not existing lib/software that could do this ?

• Real time stereo video stream. How to start

  29 juin 2015, par victor jung

  Here is my problem :

  I have at one side two webcams plugged in a linux computer, and on the other side, an android smartphone. My goal is to program a real time stream of the 2 webcams, and display that stream on the smartphone (to be used in a google cardboard mask). I read quite a lot on the subject, and I found several way to achieve this.

  First there is ffmpeg, which could encode and stream.

  But I need to modify the pictures at some point, to re-size them / or to ad some kind of distortion. So I thought it would be great if I can get the 2 images, with openCv maybe, playwith them, build a new one, and stream them, but how could ffmpeg deal with the newly created image ?

  The other option would be to get the 2 pics and play with them with openCv too, but then, hardcode a stream over, UDP in RTP style, but wouldnt be hard to display the stream nicely on the phone ?, and how to cut the image to fit in small packets ?

  Thanks for your help, I am still digging in the subject, so if you have any other way to do it I am taking !

  ps : My introducing Hello, won’t stay at the beginning of my message...
  Have a nice day every body.
  d-4 before frieday.

• lavfi/delogo : option show shouldn’t affect band

  5 juillet 2013, par Jean Delvare

  lavfi/delogo : option show shouldn’t affect band
  Options "show" and "band" are unrelated and should thus be
  
  independent. However, setting "show" to 1 currently resets "band" to
  
  its default value of 4. While this is documented, this still
  
  surprising and confusing IMHO.
  Change this behavior and make "show" and "band" independent from each
  
  other. Update the documentation accordingly.
  Signed-off-by : Jean Delvare <khali@linux-fr.org>
  
  Reviewed-by : Stefano Sabatini <stefasab@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] doc/filters.texi
  • [DH] libavfilter/version.h
  • [DH] libavfilter/vf_delogo.c