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• Resolving rtmp stream url from Adobe Flash container

  14 avril 2013, par Mustafe

  How can a rtmp stream url be retrieved completely with its playpath and be played with ffplay/avconv from a flash plugin. In embedded flash code below rtmp address exits (rtmp ://live.atv.com.tr/atv) , however it does not work with avplay since it needs playpath.

  /i.tmgrup.com.tr/p/flowplayer.controls.swf"},"influxis":{"url":"http://i.tmgrup.com.tr/p/flowplayer.rtmp.swf","netConnectionUrl":"rtmp://live.atv.com.tr/atv"},"ova":{"url":"http://i.tmgrup.com.tr/p/ova.swf","autoPlay":true,"overlays":{"regions":[{"id":"Reklam","verticalAlign":"bottom","horizontalAlign":"right","backgroundC...0,"style":".smalltext { font-style: italic; font-size:10; }"}]},"ads":{"notice":{"show":true,"region":"my-ad-notice","message":"<p class="\&quot;smalltext\&quot;" align="\&quot;right\&quot;"> Kalan süre : _countdown_ saniye.</p>"},"schedule":[{"zone":"5","position":"pre-roll","server":{"type":"direct","apiAddress":"http%3a%2f%2fad.reklamport.com%2frpgetad.ashx%3ftt%3dt_atv_canli_yayin_preroll_800x700%26vast%3d2"}}]}}},"playerId":"live","playlist":[{"eventCategory":"Canli Yayin","url":"atv3","live":true,"provider":"influxis"}]}" name="flashvars">

  Problem Solved : Using wireshark (network analyzer) is much more effective to retrieve paramaters like rtmp url, playpath...
  Edit2 : Some urls are also embedded in scripts files rather than directly in flash object, this variables are used in flash object above, later.

• lavfi : addroi filter

  7 juillet 2019, par Mark Thompson

  lavfi : addroi filter
  This can be used to add region of interest side data to video frames.
  

  • [DH] doc/filters.texi
  • [DH] libavfilter/Makefile
  • [DH] libavfilter/allfilters.c
  • [DH] libavfilter/vf_addroi.c

• Combine multiple videos into one

  10 janvier 2012, par StackedCrooked

  I have three videos :

  • a lecture that was filmed with a video camera
  • a video of the desktop capture of the computer used in the lecture
  • and the video of the whiteboard

  I want to create a final video with those three components taking up a certain region of the screen.

  Is open-source software that would allow me to do this (mencoder, ffmpeg, virtualdub..) ? Which do you recommend ?

  Or is there a C/C++ API that would enable me to create something like that programmatically ?

  Edit
  There will be multiple recorded lectures in the future. This means that I need a generic/automated solution.

  I'm currently checking out if I could write an application with GStreamer to do this job. Any comments on that ?

  Solved !
  I succeeded in doing this with GStreamer's videomixer element. I use the gst-launch syntax to create a pipeline and then load it with gst_parse_launch. It's a really productive way to implement complex pipelines.

  Here's a pipeline that takes two incoming video streams and a logo image, blends them into one stream and the duplicates it so that it simultaneously displayed and saved to disk.

    desktop. ! queue
  
             ! ffmpegcolorspace
  
             ! videoscale
  
             ! video/x-raw-yuv,width=640,height=480
  
             ! videobox right=-320
  
             ! ffmpegcolorspace
  
             ! vmix.sink_0
  
    webcam. ! queue
  
            ! ffmpegcolorspace
  
            ! videoscale
  
            ! video/x-raw-yuv,width=320,height=240
  
            ! vmix.sink_1
  
    logo. ! queue
  
          ! jpegdec
  
          ! ffmpegcolorspace
  
          ! videoscale
  
          ! video/x-raw-yuv,width=320,height=240
  
          ! vmix.sink_2
  
    vmix. ! t.
  
    t. ! queue
  
       ! ffmpegcolorspace
  
       ! ffenc_mpeg2video
  
       ! filesink location="recording.mpg"
  
    t. ! queue
  
       ! ffmpegcolorspace
  
       ! dshowvideosink
  
    videotestsrc name="desktop"
  
    videotestsrc name="webcam"
  
    multifilesrc name="logo" location="logo.jpg"
  
    videomixer name=vmix
  
               sink_0::xpos=0 sink_0::ypos=0 sink_0::zorder=0
  
               sink_1::xpos=640 sink_1::ypos=0 sink_1::zorder=1
  
               sink_2::xpos=640 sink_2::ypos=240 sink_2::zorder=2
  
    tee name="t"