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• Rescalling and Reposition images in FFMPEG in a video #2

  9 février 2021, par najam ulhassan

  I am trying to achieve this result using Mobile-FFMPEG :
  


  


  using following command :

  


  E/COMMAND :

  


  ffmpeg -y -loop 1 -t 10 -i /storage/emulated/0/InvitationTemp/image.png -s 991x903
-loop 1 -i /storage/emulated/0/InvitationTemp/image_0.png 
-loop 1 -i /storage/emulated/0/InvitationTemp/image_1.png 
-loop 1 -i /storage/emulated/0/InvitationTemp/image_2.png 
-loop 1 -i /storage/emulated/0/InvitationTemp/image_3.png 
-loop 1 -i /storage/emulated/0/InvitationTemp/image_4.png 
-filter_complex 
    
[1]scale=eval=frame:w='min(292/2,298/2)':h='min(292/2,298/2)',rotate=a=0*PI/180:c=black@0:oh='roth(0*PI/180)':ow='rotw(0*PI/180)':bilinear=1,fade=in:st=0:d=1:alpha=1[img1];  [2]scale=eval=frame:w='min(258/2,322/2)':h='min(258/2,322/2)',rotate=a=0*PI/180:c=black@0:oh='roth(0*PI/180)':ow='rotw(0*PI/180)':bilinear=1,fade=in:st=1:d=2:alpha=1[img2];
[3]scale=eval=frame:w='min(240/2,218/2)':h='min(240/2,218/2)',rotate=a=0*PI/180:c=black@0:oh='roth(0*PI/180)':ow='rotw(0*PI/180)':bilinear=1,fade=in:st=2:d=3:alpha=1[img3]; [4]scale=eval=frame:w='min(290/2,320/2)':h='min(290/2,320/2)',rotate=a=0*PI/180:c=black@0:oh='roth(0*PI/180)':ow='rotw(0*PI/180)':bilinear=1,fade=in:st=3:d=4:alpha=1[img4]; [5]scale=eval=frame:w='min(425/2,91/2)':h='min(425/2,91/2)',rotate=a=0*PI/180:c=black@0:oh='roth(0*PI/180)':ow='rotw(0*PI/180)':bilinear=1,fade=in:st=4:d=5:alpha=1[img5];
[0][img1]overlay=137:341:shortest=1:format=auto[bg1];
[bg1][img2]overlay=609:74:shortest=1:format=auto[bg2];
[bg2][img3]overlay=432:325:shortest=1:format=auto[bg3];
[bg3][img4]overlay=700:579:shortest=1:format=auto[bg4];
[bg4][img5]overlay=92:786:shortest=1:format=auto,format=yuv420p /storage/emulated/0/InvitationEventVideos/video_2021_Feb_09_09_39_38.mp4


  


  But I am receiving this output... Failing to rescale and repositions propertly my png's.

  


  https://www.youtube.com/watch?v=EIJEPIHTcio

  


• python serve mp4 files securely [closed]

  4 juin 2021, par mariam_gvikvarxar

  I am building video serving service on python (django framework). The main requirement is that users should not be able to see mp4 direct link.

  


  I was thinking about generating .ts files with subprocess using ffmpeg

  


  like this :

  


  import subprocess

infile = 'video.ts'
outfile = 'video.mp4'

subprocess.run(['ffmpeg', '-i', infile, outfile])


  


  but as I guess it will take a lot of resources (in a RAM) if multiple users try to watch videos

  


  How would you solve this problem if you were me ?

  


  thanks in advance

  


• Two rtsp streams to youtube on a Pi3

  19 mars 2020, par Sébastien Bonaimé

  I want to stream two rtsp camera from my birdbox to youtube from my raspberry pi 3 with the entrance in Pip (picture in picture) on top left. I don’t need sound.

  192.168.1.13 can do 30 fps with sound that I don’t need
  192.168.1.31 is only 12 fps without sound

  I have some problems of lag between the two camera on the youtube stream which I think is due to the different fps. I compile ffmpeg with h264. Here is what I did

  ffmpeg -re -f lavfi -i anullsrc -rtsp_transport udp -thread_queue_size 1000k -i rtsp://admin:123@192.168.1.13:554 -i rtsp://admin:@192.168.1.31:554 -filter_complex "[1]scale=iw/4:ih/4[pip]; [2][pip] overlay=0:0"   -framerate 13  -bufsize 512k  -b:v 1500k -threads 4 -q:v 3  -c:v h264_omx  -c:a aac -f flv rtmp://a.rtmp.youtube.com/live2/XXX-XXXX-XXX

  and here are the errors

  [h264 @ 0x20ddd30] error while decoding MB 69 67, bytestream -6rate=1589.2kbits/s dup=0 drop=6 speed=0.997x
  
  [h264 @ 0x20ddd30] concealing 100 DC, 100 AC, 100 MV errors in I frame
  
  rtsp://admin:@192.168.1.31:554: corrupt decoded frame in stream 0te=1589.0kbits/s dup=0 drop=6 speed=0.997x
  
  [rtsp @ 0x1f2cea0] max delay reached. need to consume packetbitrate=1589.2kbits/s dup=0 drop=6 speed=0.997x
  
  [rtsp @ 0x1f2cea0] RTP: missed 35 packets
  
  [h264 @ 0x2099580] error while decoding MB 60 30, bytestream -6rate=1589.3kbits/s dup=0 drop=6 speed=0.997x
  
  [h264 @ 0x2099580] concealing 4549 DC, 4549 AC, 4549 MV errors in I frame
  
  rtsp://admin:@192.168.1.31:554: corrupt decoded frame in stream 0
  
  [rtsp @ 0x1f2cea0] max delay reached. need to consume packetbitrate=1588.9

  What can I do to improve the stream ? When a bird enter the box, there is also a quality problem when the image is changing and some lagging.
  You can have a look here
  https://www.youtube.com/watch?v=iisbinyvSFk&feature=youtu.be

  Thank you