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• Ffmpeg - Exclamation Point Stopping Watermark

  25 août 2018, par user5947524

  I am using the code below to automatically watermark videos in a folder :

  for %%a in ("C:\Users\Work\Desktop\Redo\*.mp4") do (
  
     for /F "delims=" %%I in ('ffprobe -v quiet -show_entries stream^=width -of csv^=p^=0:s^=x %%a') do set "codec=%%I"
  
     ffmpeg -i logo.png -y -v quiet -vf scale=!codec!*0.25:-1 scaled.png
  
     ffmpeg -i "%%a" -vf "movie=scaled.png [watermark]; [in][watermark] overlay=10:main_h-overlay_h [out]" "C:\Users\Work\Desktop\Redo Done\%%~na.mp4"
  
  )

  Some of the videos fail to watermark and give the similar error below :

  C:\Users\Work\Desktop\Redo\Arcade_h-overlay_h [out]: No such file or directory

  I found out all videos with exclamation points (!) in the name do this.

  How can I get these videos to watermark with an exclamation point in the title ?

• Using ffmpeg to watermark a folder of videos

  25 août 2018, par user5947524

  I am using the code below to watermark individual videos one-by-one in a folder :

  ffprobe -v quiet -show_entries stream=width,height -of default=noprint_wrappers=1 dave.mp4
  
  ffmpeg -i logo.png -y -v quiet -vf scale=width*0.15:-1 scaled.png
  
  ffmpeg -i dave.mp4 -i scaled.png -filter_complex "overlay=10:main_h-overlay_h-10" dave2.mp4

  The first line gets the width and the height of a video, second line scales the watermark for that video, third line creates a new video watermarked.

  How can I make run for a full folder of 1000 videos ?

  I tried the code below but it corrupted the videos :

  for %%a in ("C:\Users\Work\Desktop\test2\*.mp4") do (
  
   ffprobe -v quiet -show_entries stream=width,height -of default=noprint_wrappers=1 "%%a" 
  
   ffmpeg -i logo.png -y -v quiet -vf scale=width*0.15:-1 scaled.png 
  
   ffmpeg -i "%%a" -i scaled.png -filter_complex "overlay=10:main_h-overlay_h-10" "C:\Users\Work\Desktop\test2\%%~na.mp4"
  
  )

  The error I get is :

  [mov,mp4,m4a,3gp,3g2,mj2 @ 0000014545aaaa00] stream 0, offset 0x18039: partial file
  
  [aac @ 0000014545b708c0] Input buffer exhausted before END element found
  
  Error while decoding stream #0:1: Invalid data found when processing input
  
  C:\Users\Work\Desktop\test2\dave.mp4: Invalid data found when processing input

• How to stream Opus stream from Discord to RTP

  16 août 2018, par qxu21

  I’m using a Node.JS Discord bot to stream a voice call over RTP. Currently, in my speaking event handler, I have

  var cmd = child_process.spawn("ffmpeg", [
  
            '-protocol_whitelist', 'file,crypto,sdp,rtp,udp,pipe,opus',
  
            '-re',
  
            '-acodec', 'opus',
  
            '-i', '-',
  
            '-ar', '8000',
  
            '-acodec', 'pcm_mulaw',
  
            '-f', 'mulaw',
  
            '-f', 'rtp',
  
            `rtp://${rtp_ip}:${rtp_port}`]);
  
  reciever.createOpusStream(user).pipe(cmd.stdin);

  equivalent to running the ffmpeg command ffmpeg -protocol_whitelist file,crypto,sdp,rtp,udp,pipe,opus -re acodec opus -i - -ar 8000 -acodec pcm_mulaw -f mulaw -f rtp rtp://${rtp_ip}:${rtp_port}

  Variations of this command produce errors ranging from pipe:: Invalid input or pipe:: Invalid argument to Invalid data on input. to

  [mp3 @ 0x5615decebe60] Format mp3 detected only with low score of 1, misdetection possible!
[mp3 @ 0x5615decebe60] Failed to read frame size: Could not seek to 16101.

  Could anyone help me with sending a ReadableStream (opus) to an RTP mulaw stream ? Thanks !