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• Seek and pause video stream from ffserver

  9 mai 2015, par Bresiu

  I managed to successfully feed ffserver from ffmpeg. ffmpeg takes input as PIPE :

  ffmpeg -loglevel fatal -f image2pipe -re -vcodec png -i - -vcodec libx264 http://localhost:8090/%s.ffm

  External java process generates svg/png images and pushes to ffpmepg

  My ffserver config allows me to buffer live feeds in ffm file without defining the size of the file.

  My stream configuration looks like this :

  <stream>
  
     Feed feed2.ffm
  
     Format mpjpeg
  
     VideoFrameRate 25
  
     VideoSize 640x880
  
     VideoQMin 1
  
     VideoQMax 5
  
     NoAudio
  
     Strict -1
  
  </stream>

  The problem is that, despite that I can watch streams in VLC by opening network :

  http://0.0.0.0:8090/live2.mjpg

  But I can not seek through already buffered movie.
  Is there a way to achieve seeking through movie, pausing, and resume playing from "now" ? I have tried already rtsp with h264, mpg and sdp but without success :

  <stream></stream>sdp/h264>
  
     Format rtp
  
     Feed feed2.ffm
  
     VideoCodec libx264
  
     VideoSize 640x880
  
     VideoQMin 1
  
     VideoQMax 5
  
     NoAudio
  
     Strict -1
  
     VideoFrameRate 25

  Is rtsp solution for this problem, or I need something else ?

  Can this be achieved from dynamic file since I am using PIPE ?

• Concatenating image with video for Freeze frame effect

  12 mai 2015, par Code_Ed_Student

  I am currently trying to achieve with ffmepg a freeze frame effect. This is something easy to do with adobe after effects shown here. However I would like to achieve a freeze frame effect(of 5 seconds duration) followed by the 15 second video for the final output video. This should amount to a final duration of 20 seconds. However with the settings below, I am getting a still image with the video following but it does not show a "freeze frame effect". How can I achieve a "freeze frame effect" in ffmpeg ?

  //create image

  ffmpeg -i "/media/test/test.mp4" -ss 00:00:00.023222 -vframes 1 "/media/test/test.png"

  //create freeze image effect

  ffmpeg -i "/media/test/test.mp4" -loop 1 -i "/media/test/test.jpg" -an \
  
  -filter_complex "[1:v]trim=start=0:end=5[ol];[0:v]setpts=[nv];[nv][ol]overlay=eof_action=pass[final]" \
  
  -map '[final]' -c:a aac -strict experimental -c:v libx264 -q 1 "/media/test/test_effect.mp4"

• Making jumping text watermark

  18 mai 2015, par robocop robocop

  I want to make something like these :
  http://www.youtube.com/watch?v=AtM-f20XV4E
  you can see there a watermark which change position every two second...

  But I need it for drawtext filter.

  So, I am already realize how to change a text position every few seconds..
  but have no idea - how to keep new position :)
  there is a code which I have right now..

  ffmpeg.exe -i myVideo.mov -c:v libx264 -preset veryfast -crf 25 -tune zerolatency -vendor ap10 -pix_fmt yuv420p -filter:v drawtext=fontfile=arial.ttf:text=MY_WATERMARK_TEXT:fontcolor=white:alpha=0.5:fontsize=74:box=1:boxcolor=red:x=if(eq(mod(t\,1)\,0)\,1000\,10):y=(h-text_h-line_h)/2 -c:a copy outVideo.mp4

  it move my text to new position every 1 second. but then immediately change position back of course.

  So, I stuck about that.. how to keep new position ?
  may be I should using ld() and st() ?