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• Extract different camera frames (multiplex)

  22 août 2016, par Mike Issa

  I have a sequential multiplexed video with 3 cameras. These videos are being converted from VHS to DVD (.VOB format). I am using ffmpeg to extract all frames in .JPG format.

  I want to write a python script that scans for a certain object in the frame (like a constant/static object in the background) and organizes all the frames containing that object into a folder. This is the only way I can think of to separate the camera views, because as the video progresses, one of the cameras turns off for a few minutes and then turns back on, ruining the interval of 3-frames-per-camera-view sequence*.

  • I tried writing a python script that extracts every third frame (starting from the first frame for camera 1, second frame for camera 2, third frame for camera 3) into separate folders, but this did not bode well when I found out that one of the cameras switches off and then back on.

  I tried a "detection patch" method using VirtualDub found in this forum, but it didn’t work for me (not sure why).

  Should I be using numpy or openCV to find a certain block of pixels in each frame to do the organizing of camera views, or is there a simpler way ?

• Révision 93500 : Annuler le commit précédent sur les espaces insécables.

  9 décembre 2015, par pierre.fiches@gmail.com

  C’est probablement sur la chaine de langue qu’il faut intervenir.
  Elle est dans ecrire_fr.php, ne faudrait-il pas la déplacer dans le plugin forum
  texte_statut_publies
  texte_statut_attente_validation
   ?

• How to capture mpeg ts streaming via udp in Golang ?

  9 octobre 2019, par Lucas

  I have some live stream shared via some udp adress with specified port. I would like to capture this and save to my filesystem.

  It says :
  mpegts, from ’udp ://xx.x.x.x:xx’ and then some metadata (x are for safety reason, in original these are numbers ofcourse).

  With that being said, is there any Go package capable to simple capture this stream ? If no, can someone provide FFMPEG command to do that ?

  I need to say I am completly new to the streaming subject.

  What I found is :

  Golang package (but not idea how to configure it) :
  https://godoc.org/github.com/asticode/go-astits#Demuxer

  This thread, but given ffmpeg command seems to not work properly (it starts, gives some output [I can provide it] and hangs doing nothing) :
  https://ffmpeg.zeranoe.com/forum/viewtopic.php?t=5175&fbclid=IwAR0Sxshm1rDPyaCgvAig5D6pnAEPl0mNzxf3rFDgZk6pEg4nJr1ChBaxNHs

  Disclaimer : Had to use ’mpeg2-ts’ in tags, beacuase there is no ’mpeg-ts’. Not sure if I am messing something....