Recherche avancée

Sur d’autres sites (10077)

• How to Speed Up Two-Pass Encoding ?

  27 juillet 2017, par Matt McManis

  I have a Video file with Audio, Subtitles, Chapters, and Metadata.

  I removed Audio and Subtitles with -an -sn from -pass 1 and then inlclude them in -pass 2.

  What about for Chapters and Metadata ? And how do you apply Turbo to -pass 1 ?

  Is there anything more that can be done ?

  ---

  I have a script that will convert mpg to mp4. I’ve sorted it with linebreaks so it’s easier to read.

  Pass 1

  "C:\Videos\example.mpg" 
  
  
  
  -vcodec libx264 
  
  -preset medium -b:v 2500K -pix_fmt yuv420p -qcomp 0.8 
  
  -vf scale="trunc(iw/2)*2:trunc(ih/2)*2" 
  
  -pass 1 
  
  
  
  -map 0:v:0? -an -sn
  
  
  
  -threads 8 
  
  
  
  "C:\Videos\example.mp4" 

  Pass 2

  ffmpeg -y -i 
  
  
  
  "C:\Videos\example.mpg" 
  
  
  
  -vcodec libx264 
  
  -preset medium -b:v 2500K -pix_fmt yuv420p -qcomp 0.8 
  
  -vf scale="trunc(iw/2)*2:trunc(ih/2)*2" 
  
  -pass 2 
  
  
  
  -acodec aac 
  
  -b:a 320k 
  
  -af volume=1.2 
  
  
  
  -map 0:v:0? -map 0:a:0? -map 0:s? -c:s copy -map_metadata 0 
  
  
  
  -threads 8 
  
  
  
  "C:\Videos\example.mp4"

• avfilter/vsrc_gradients : make rotation always continuous if speed changes

  3 décembre 2023, par Paul B Mahol

  avfilter/vsrc_gradients : make rotation always continuous if speed changes
  

  • [DH] libavfilter/vsrc_gradients.c

• Live Video Chat for iPhone and HTTP Live Streaming

  14 janvier 2024, par mayuur

  I want to make an app which has video chat functionality for iPhone. But after many searches, I am still not able to find any successful results. Is there any public or even for that matter, private API available for doing this on iPhone ? If you have an YES answer, please help me.

  


  Basically, what I want is to read the streams of the video on both the devices connected for chatting. Please help me if you can.

  


  p.s - I have already checked iDoubs but it failed and always shows some unknown problem and for that reason, doesn't allow me to connect to anyone.

  


  ALSO : The suggested method I have found is via HTTP Live Streaming. But, in that too, I have multiple doubts.

  


  1.) I need to find how do I upload my video from iPhone to the HTTP server from where I would be broadcasting ?

  


  2.) Can you please post something related to setting up the server ? How do I feed the video to the FFMPEG Server ?

  


  Mainly, I need to find the upload method. I am right now simply sending hex-code in the form of NSDATA to the server and I am stuck there. The main problem is, It is live. How do I handle that ?

  


  It would be best, if you could help me make the iDoubs work properly.