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• Can't put another gif aside on video using ffmpeg

  5 mars 2023, par Peter.k

  I want to put 2 gifs side by side onto a video. I use code :

  


  ffmpeg -i tt108_5.mp4 -ignore_loop 0 -i e:\gals\flags\Russie.gif -ignore_loop 0 -i e:\gals\flags\Ukraine.gif -filter_complex \
"[1:v][0:v]scale2ref=oh*mdar:ih/5[ua][b];[ua]setsar=1,format=yuva420p,colorchannelmixer=aa=0.75[u];[b][u]overlay=shortest=1;\
 [2:v][0:v]scale2ref=oh*mdar:ih/5[ua2][b2];[ua2]setsar=1,format=yuva420p,colorchannelmixer=aa=0.75[u2];[b2][u2]overlay=0:200:shortest=1"\
-c:a copy -y -r 30 -b:v 2000k tt108_5f.mp4


  


  It works only for 1st gif, but the second is missing in the result. I also would like to know how to address the first gif's size to use some variables instead of arbitrary number overlay=0:200, to put them in vstack mode.

  


• FFMPEG : How to output image2 format into a tcp/udp socket ?

  5 août 2019, par Sagi Mann

  I’ve got ffmpeg to read some RTSP stream and output image2 format to stdout like so :

  ffmpeg -rtsp_transport tcp -i  "rtsp:xxxxx" -f image2 -update 1 -

  But stdout is not good enough for me.. I am trying to pass it to "push" it to some other process that I cannot "pipe" to ffmpeg due to some architecture constraints. I am running on Linux so I was hoping to simulate some tcp/udp socket via the file system e.g. /dev/somthing or similar. Alternatively, maybe it’s possible to get ffmpeg to send the image directly to a given tcp/udp address ? This didn’t work though (ffmpeg expects a file output) :

  ffmpeg -rtsp_transport tcp -i  "rtsp:xxxxx" -f image2 -update 1 "udp://localhost:3333"

  Any ideas ?
  Thanks

• Issue with output RTSP stream converted using ffmpeg filter-complex

  11 mars 2019, par Mehul Panchasara

  I have a camera feed which I am getting in RTSP for example : rtsp ://172.16.1.177:8554/test

  here are the stream details I got using ffmpeg -i rtsp://172.16.1.177:8554/test

  Input #0, rtsp, from 'rtsp://172.16.1.177:8554/test':
  
    Metadata:
  
      title           : Session streamed with GStreamer
  
      comment         : rtsp-server
  
    Duration: N/A, start: 0.710544, bitrate: N/A
  
      Stream #0:0: Video: h264 (Constrained Baseline), yuv420p(progressive), 1920x1080, 15 tbr, 90k tbn, 180k tbc

  Now, I am applying chromakey to the above stream which is giving me perfect output in mp4

  ffmpeg -i background.jpg -i rtsp://172.16.1.177:8554/test -filter_complex "[1:v]colorkey=0x26ff0b:0.3:0.2[ckout];[0:v][ckout]overlay[out]" -map "[out]" output.mp4

  After that, I’ve created and successfully started ffserver using the below config file

  HTTPPort 8091
  
  RTSPPort 8092
  
  HTTPBindAddress 0.0.0.0
  
  <feed>
  
      File /tmp/feed1.ffm
  
      FileMaxSize 2048M
  
      ACL allow localhost
  
  </feed>
  
  <stream>
  
      Feed feed1.ffm
  
      Format rtp
  
      NoAudio
  
      VideoCodec libx264
  
      VideoFrameRate 15
  
      VideoBitRate 1000
  
      VideoSize 1920x1080
  
      ACL allow 172.16.1.30 172.16.0.2
  
  </stream>

  I am trying to export output stream using below command

  ffmpeg -i background.jpg -i rtsp://172.16.1.177:8554/test -filter_complex "[1:v]colorkey=0x26ff0b:0.3:0.2[ckout];[0:v][ckout]overlay[out]" -map "[out]" http://localhost:8091/feed1.ffm

  which gives me below error

  Input #0, image2, from 'background.jpg':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: 23866 kb/s
  
      Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 854x480 [SAR 72:72 DAR 427:240], 25 tbr, 25 tbn, 25 tbc
  
  Input #1, rtsp, from 'rtsp://172.16.1.177:8554/test':
  
    Metadata:
  
      title           : Session streamed with GStreamer
  
      comment         : rtsp-server
  
    Duration: N/A, start: 0.711933, bitrate: N/A
  
      Stream #1:0: Video: h264 (Constrained Baseline), yuv420p(progressive), 1920x1080, 15 tbr, 90k tbn, 180k tbc
  
  [tcp @ 0x7fdb88706680] Connection to tcp://localhost:8091 failed (Connection refused), trying next address
  
  [tcp @ 0x7fdb88402920] Connection to tcp://localhost:8091 failed (Connection refused), trying next address
  
  Filter overlay has an unconnected output

  I don’t have much experience with either ffmpeg or ffserver, so I don’t exactly know why there is the issue with unconnected output

  Filter overlay has an unconnected output