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• How to cleanup data to reuse ffmpeg.wasm instance

  24 avril, par rickyz

  I have multiple files that I am trying to process back to back using ffmpeg.wasm. I have noticed that after around 150 runs, a memory issue comes up : RuntimeError: memory access out of bounds. I tried doing cleanup using ffmpeg.deleteFile() on both the input and output files after every run, but that didn't make a difference. Is there something I am missing that will allow me to reuse the ffmpeg instance as many times as I want ?

  


  If I can avoid it, I do not want to have to call ffmpeg.terminate() after each use since loading ffmpeg for the next use takes a long time ( .5 secs on my test machine).

  


  Note : I am using the updated ffmpeg.wasm v0.12+ in a browser setting

  


• reading lines from txt file into .csv

  7 janvier 2014, par Dynamite Media

  i have a .TXT file i created via batch file using ffmpeg. it returns the following info ( more but trying to make short)

  major_brand=isom 
  
  minor_version=512 
  
  compatible_brands=isomiso2avc1mp41 
  
  creation_time=1970-01-01 00:00:00 
  
  encoder=Lavf53.19.0 
  
  genre=sport 
  
  track=1 
  
  title=IRWX_TV_Vol_01_1_Pt_4 
  
  episode_id=0101 

  the .TXT file comes back with 3 of these above. well i want to be able to only use some of the info above and then i want to create a .CSV file so that i can load into .XLS file

  I have used the following and it's close :

  REM now lets get info we need from result.txt
  
  pause 
  
  
  
  REM checks how many times finds genre and loops that many times
  
  FOR /f "delims=" %%b IN ('findstr "genre" result.txt') DO (
  
  for %%f in (result.txt) do (
  
      set i=0
  
  
  
  for /F "delims= tokens=2,3*" %%l in (%%f) do (
  
      set /A i+=1
  
      set line!i!=%%l
  
  
  
  )
  
  echo  !line9!, !line6!, !line8!,  >> result.csv
  
  )
  
  ) 
  
  pause 

  and this is coming back with the following :

   title=IRWX_TV_Vol_01_1_Pt_4 , genre=sport, episode_id=0101
  
   title=IRWX_TV_Vol_01_1_Pt_4 , genre=sport, episode_id=0101
  
   title=IRWX_TV_Vol_01_1_Pt_4 , genre=sport, episode_id=0101

  ONLY the 1st video title from .TXT file and not each of them

  AND i would prefer it to come back like this :

   IRWX_TV_Vol_01_1_Pt_4,sport,0101

  Minus the variables, the "=" and the space issues you see above.

  i have been going over and over this trying different things and it is just not working.

  Hopefully someone here can see the issue and help out, Thanks

• FFmpeg RTSP + RTMP get errors

  19 décembre 2017, par Akim Benchiha

  I’m working with live streaming on nginx. What I have is a RTSP (broadcast video) stream coming from a server and a RTMP stream coming from camera.
  I combine them using ffmpeg.
  I want to send a bool to the back-end using cURL when RTMP has been stopped or if RTSP is not found/stopped

  Here the use case :
   Send false to the back-end when the user stop recording the video (RTSP)
   Send false to the back-end when the user stop the camera (RTMP)
   Send true if everything is ok

  NGINX config :

  rtmp {
  
  server {
  
       listen 1935;
  
       ping 30s;
  
       notify_method get;
  
       application ingest {
  
         live on;
  
         exec_kill_signal term;
  
         idle_streams off;
  
         exec_push /usr/local/bin/ffmpeg_push.sh $name ;
  
       }
  
    }
  
  }

  FFMPEG

  ffmpeg -i $rtspstream -i rtmp://localhost/ingest/$name -ignore_unknown -filter_complex "[0]scale=-1:-1[b];[1]scale=128:128[w];[b][w] overlay=10:10" -vcodec libx264 -x264opts keyint=20:min-keyint=1 -preset ultrafast -c:a aac -f flv rtmp://IPADDRESS/ingest/$streamname 1>>/var/log/ffmpeg/$name.log 2>>/var/log/ffmpeg/$name.log &
  
  
  
  echo $! > /var/log/ffmpeg/${name}.pid

  Thank you