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• Anyone using Azure Container Instances to run FFMPEG encoding for video uploads to their website ?

  29 janvier 2021, par Jonathan

  I've been putting a website together in PHP and part of the functionality is to trim some video and encode as MP4 and AAC audio.

  


  FFMPEG runs locally on the webserver and uses up all the CPU when encoding which is not ideal. What I would like to do in theory is remove the FFMPEG service from the webserver and put it on a Azure container service which I can pay for 60 seconds of some high power computer occasionally to do the encoding, then spins back down.

  


  The issue im having the tutorials I'm following I cant even get to the point of running some FFMPEG commands via command line. Let alone writing some code in PHP to offload this to the container instance.

  


  Does anyone have anything they can point me to that might help me get started.

  


• unconnected output - FFMPEG

  9 avril 2018, par Hernan Quintero

  Im trying to make my first apple Service.

  I want FFMPEG to extract 5.1 Audio from a video with this command line :

  ffmpeg -i infile \
  
  -filter_complex "channelsplit=channel_layout=5.1[FL][FR][FC][LFE][BL] 
  
  [BR]" \
  
  -map "[FL]" front_left.wav \
  
  -map "[FR]" front_right.wav \
  
  -map "[FC]" front_center.wav \
  
  -map "[LFE]" lfe.wav \
  
  -map "[BL]" back_left.wav \
  
  -map "[BR]" back_right.wav

  It works very good from the Terminal, but when I try to make a Service in Automator I get the following error :

  Filter channelsplit:BR has an unconnected output

  This is the command line for the service :

  on run {input, parameters}
  
  tell application "Terminal"
  
      activate
  
      set filesString to ""
  
      repeat with file_ in input
  
          set filesString to filesString & " " & quoted form of (POSIX path of file_)
  
      end repeat
  
      do script "for f in" & filesString & "; do
  
  /usr/local/bin/ffmpeg -i \"$f\" -filter_complex 
  
  channelsplit=channel_layout=5.1[FL][FR][FC][LFE][BL][BR] 
  
  -map [FL] front_left.wav 
  
  -map [FR] front_right.wav 
  
  -map [FC] front_center.wav 
  
  -map [LFE] lfe.wav 
  
  -map [BL] back_left.wav 
  
  -map [BR] back_right.wav 
  
  done"
  
  end tell
  
  return input
  
  end run

  Could you guys help me to figure out what I’m doing wrong ?

  Thank you very much.

• FFmpeg conversion to Photo-JPEG is blocky [duplicate]

  26 mai 2017, par Richard210363

  This question already has an answer here :

  • ffmpeg generate higher quality images for MJPEG encoding
    
    1 answer
    

  I am converting .mp4 files to .mov with the Photo-JPEG codec to use in After Effects to reduce render times.

  I have looked up the FFmpeg commands to do this and come up with :

  ffmpeg -i tower-bridge.mp4 -an -pix_fmt yuvj420p -vcodec mjpeg -f mov -y tower-bridge.mov 

  This works but when I look at the output video it is quite blocky ; like a mosaic.

  During the conversion I get this message :

  [swscaler @ 0000000008c97fe0] deprecated pixel format used, make sure you did set range correctly

  Research on-line suggests I can ignore this message.

  What can I do to improve the output quality ?

  MediaInfo report on Input file :

  Complete name : F :\london-tower-bridge.mp4
  Format : MPEG-4
  Format profile : Base Media
  Codec ID : isom (isom/avc1/mp42)
  File size : 18.7 MiB
  Duration : 13 s 625 ms
  Overall bit rate : 11.5 Mb/s
  

  ID : 1
  Format : AVC
  Format/Info : Advanced Video Codec
  Format profile : Baseline@L4
  Format settings, CABAC : No
  Format settings, ReFrames : 3 frames
  Codec ID : avc1
  Codec ID/Info : Advanced Video Coding
  Duration : 13 s 625 ms
  Bit rate : 11.5 Mb/s
  Maximum bit rate : 26.8 Mb/s
  Width : 1 920 pixels
  Height : 1 080 pixels
  Display aspect ratio : 16:9
  Frame rate mode : Constant
  Frame rate : 24.000 FPS
  Color space : YUV
  Chroma subsampling : 4:2:0
  Bit depth : 8 bits
  Scan type : Progressive
  Bits/(Pixel*Frame) : 0.231
  Stream size : 18.7 MiB (100%)
  Writing library : Zencoder Video Encoding System
  

  MediaInfo report on Output file :

  Complete name : F :\london-tower-bridge.mov
  Format : MPEG-4
  Format profile : QuickTime
  Codec ID : qt 0000.02 (qt )
  File size : 16.1 MiB
  Duration : 13 s 625 ms
  Overall bit rate mode : Variable
  Overall bit rate : 9 912 kb/s
  Writing application : Lavf57.72.101
  

  ID : 1
  Format : JPEG
  Codec ID : jpeg
  Duration : 13 s 625 ms
  Bit rate mode : Variable
  Bit rate : 9 910 kb/s
  Width : 1 920 pixels
  Height : 1 080 pixels
  Display aspect ratio : 16:9
  Frame rate mode : Constant
  Frame rate : 24.000 FPS
  Color space : YUV
  Chroma subsampling : 4:2:0
  Bit depth : 8 bits
  Scan type : Progressive
  Compression mode : Lossy
  Bits/(Pixel*Frame) : 0.199
  Stream size : 16.1 MiB (100%)
  Language : English