Recherche avancée

Sur d’autres sites (15424)

• How play AVI with sound by OpenCV on Win32

  4 janvier 2015, par Andrei Shumilov

  I need play AVI by OpenCV and any sound player (vfw/ffmpeg...) on Win32. It seems to me this is very secret or useless thing ’cos I found only one sample in the world : Audio output with video processing with opencv

  Mr. Karl Phillip wrote there :
  "On my Mac I compiled it with :
  g++ ffmpeg_snd.cpp -o ffmpeg_snd -D_GNU_SOURCE=1 -D_THREAD_SAFE -I/usr/local/include/opencv -I/usr/local/include -I/usr/local/include/SDL -Wl,-framework,Cocoa ...."

  But I must use MSVS2010 (I have working project). Ok, I installed mingw to try, but still don’t know what could replace "framework,Cocoa".

  Give me please links to WORKING examples OpenCV+anysoundplayer on Win32 or help me port Karl’s example at least.

• video created by moviepy doesn't play on web

  18 février 2016, par R. Glenn

  I’m playing around with moviepy, with the intent of creating videos to imbed in webpages. However, I’m having trouble getting the videos that I create to actually play in chrome and firefox (it does play in safari :/ ).
  Firefox claims the "file is corrupt".

  I find it extremely likely I haven’t installed something properly. I followed (among other things, since I’m not yet authorized to post enough links so as to fully describe my situation, #thanksStackOverflow ;P) http://wiki.webmproject.org/ffmpeg/building-with-libvpx, but according to [link I would have shared if allowed :P] that stuff is all "automatically installed during MoviePy’s installation", so I’m not sure how I could have messed it up.

  see example code (I’ve tried it with ’python’, ’python3’ and ’python3.5’) :

  from moviepy.editor import *
  
  
  
  filepath = "../read_videos/MOVI0011.avi"
  
  file = VideoFileClip(filepath)
  
  
  
  clips = []
  
  clips.append(file.subclip(10, 12))
  
  clips.append(file.subclip(20, 22))
  
  clips.append(file.subclip(30, 32))
  
  clips.append(file.subclip(40, 42))
  
  
  
  concatenated_clip = concatenate_videoclips(clips)
  
  
  
  concatenated_clip.write_videofile("../write_videos/clip.mp4", fps=24, codec='mpeg4')

  firefox error

  OSX El Capitan (10.11.3)

• Can javascript MSE play segmented mp4 from the middle ?

  10 juillet 2020, par Elias Wagnerberger

  in my current project i have a video stream that ffmpeg encodes to a segmented mp4. that encoded data is piped into an application that sends that data to whomever connects to that application through a websocket. when a client connects i make sure to send the ftyp and the moov boxes first and then send the most recent segments recieved from ffmpeg.

  


  on the client side i just pass all binary data from the websocket to MSE.

  


  The problem i am facing is that this works if the client is connected from the very start and gets all the fragments that ffmpeg pipes out, but it does not work if the client connects in after ffmpeg sends its first few fragments.

  


  My question is :
Is it possible for MSE to play a fragmented mp4 from the middle when it is also provided the init segments ?

  


  If it is possible then how would that need to be implemented ?

  


  if it isnt possible then what format would allow me to stream live video over a websocket ?