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• avcodec/ccaption_dec : Make real-time latency configurable

  19 juin 2021, par Pavel Koshevoy

  avcodec/ccaption_dec : Make real-time latency configurable
  Un-hardcode the 200ms minimum latency between emitting subtitle events
  
  so that those that wish to receive a subtitle event for every screen
  
  change could do so.
  The problem with delaying realtime output by any amount is that it is
  
  unknown when the next byte pair that would trigger output will happen.
  
  It may be within 200ms, or it may be several seconds later — that's
  
  not realtime at all.
  

  • [DH] libavcodec/ccaption_dec.c
  • [DH] libavcodec/version.h

• Streaming images as video on the fly using ffmpeg and ffserver

  1er décembre 2017, par AstrOne

  I have an OpenGL application that renders a 3D scene, and in every frame, it captures the OpenGL frame buffer, and saves it to a series of files (frame_1.png, frame_2.png, etc). I want to convert those images into a video stream and serve/broadcast it. From what I have read so far one solution would be to use ffmpeg and ffserver.

  There are several similar questions on StackOverflow but each one is a bit different, and they don’t ask exactly what I want. For example there are solutions to generate videos (but not streams) from images. Some others generate streams but not "live" ones. And so on.

  • I want the generated frames to be streamed as soon as possible after they are created. This is because the OpenGL application is supposed to be interactive. Latter on, a remote user should be able to send events (mouse motions and clicks) and interact with the rendered 3D scene.
  • I don’t want ffserver to do any kind of buffering because there is nothing to buffer, the frames must be served immediately.
  • Given that the frames must be served immediately, I guess I could just write the frames on top of each other. However, in that case there will be a synchronisation problem because the ffmpeg may try to read the image before the OpenGL application has finished writing on it. Any thoughts on that ?
  • In case the ffserver and the OpenGL application share the same RAM and not just the filesystem, ideally, I would like to not use files at all for the communication. I guess for my OpenGL application I could use something like mmap or some sort of shared memory, but ffmpeg can’t read from some kind of shared memory, right ?

  I would be more than grateful if someone could advice me how I need to setup the ffserver and the ffmpeg command to meet the above requirements (especially the first one).

• Application won't work after disconnecting from RDP [closed]

  12 juillet 2023, par Duri Eun

  The problem is that my Java Script runs perfectly fine when I have a connection with RDP to my Windows Server but when I disconnect (Clicking X) as title says my Script wont work as expected.

  


  It is recieving the requests from my website but can't do the tasks properly such as FFMpeg.

  


  


  Error adding banner to the video : Error : ffmpeg exited with code 1 :
at ChildProcess. (C :\Users\durieun02\Desktop\server\node_modules\fluent-ffmpeg\lib\processor.js:182:22)
at ChildProcess.emit (node:events:513:28)
at ChildProcess._handle.onexit (node:internal/child_process:291:12)

  


  


  This is just an explanation error, in reality my process is not even working.

  


  And such more errors like this when I am disconnected, The whole point of me opening a VM was to keep my actual PC offline while server would run for me in the background.

  


  I have also tried running my Script as a background process but it didn't worked either. It still somehow didn't have the permissions or something, not really sure why.

  


  I also edited gpedit.msc and Edited necessary things such as "Session Time Limits" but its not revelant at all since my session is not turning off but rather function don't work properly when RDP is not connected.

  


  I have also trying running it as a scheduled task and windows service, the problem is still same, the script runs but its not working as expected, my website esentiially returns the errors.

  


  Thanks for the helps, I hope we can find a solution for all.