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• ffserver + ffmpeg, stream out rtsp, ffplay cannot play, but movie player can

  17 juillet 2014, par user1914692

  Ubuntu 12.04
  I use ffserver + ffmpeg.

  There are a little revision of the original /etc/ffserver.conf :

  RTSPPort 5454
  
  RTSPBindAddress 0.0.0.0
  
  
  
  # ...
  
  
  
  <stream>
  
  Format rtp
  
  # coming from live feed 'feed1'
  
  Feed feed1.ffm
  
  </stream>

  The command of ffmpeg (Option 1) is :

  ffmpeg -re -i '/usr/share/red5/webapps/oflaDemo/streams/hobbit_vp6.flv'  http://localhost:8090/feed1.ffm

  BTW, if I use Option 2 as below, it does not work :

  ffmpeg -re -i '/usr/share/red5/webapps/oflaDemo/streams/hobbit_vp6.flv'  http://192.168.1.105:8090/feed1.ffm
  
  ## not work:
  
  [http @ 0x21a9c80] HTTP error 404 Not Found
  
  http://192.168.1.105:8090/feed1.ffm: Input/output error

  So now I need to display the stream.
  On the other computer :

  (Option 1) ffplay rtsp://192.168.1.105:5454/test2-rtsp.mpg

  Not work. [Output] rtsp UDP timeout, retrying with TCP.

  (Option 2) movie player : Open location : rtsp ://192.168.1.105:5454/test2-rtsp.mpg
  it works !

• Create movie programatically

  14 novembre 2019, par Martin Delille

  I would like to create a movie programatically.

  My first iteration is to create a picture sequence with QPainter rendering (see https://github.com/MartinDelille/videogenerator) and then assemble them with ffmpeg but I would be more happy to generate the video file directly.

  I choose QPainter, but I’m open to QML rendering mechanism which is more modern in my opinion.

  What would be the best approach for this ?

• Split a movie so that each GIF is under a certain file size

  9 novembre 2014, par Terence Eden

  Problem

  I want to convert a long movie into a series on animated GIFs.

  Each GIF needs to be <5MB.

  Is there any way to determine how large a GIF will be while it is being encoded ?

  Progress So Far

  I can split the movie into individual frames :

  ffmpeg -i movie.ogv -r 25 frameTemp.%05d.gif

  I can then use convert from ImageMagick to create GIFs. However, I can’t find a way to determine the likely file size before running the command.

  Alternatively, I can split the movie into chunks :

  ffmpeg -i movie.ogv -vcodec copy -ss 00:00:00 -t 00:20:00 output1.ogv

  But I’ve no way of knowing if, when I convert the file to a GIF it will be under 5MB.

  A 10 second scene with a lot of action may be over 5MB (bad !) and a static scene could be under 5MB (not a problem, but not very efficient).

  Ideas

  I think that what I want to do is convert the entire movie into a GIF, then find a way to split it by file size.

  Looking at ImageMagick, I can split a GIF into frames, but I don’t see a way to split it into animated GIFs of a certain size / length.

  So, is this possible ?