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• Developing a multi-tool video & audio program

  14 février 2019, par Risviltsov

  I’m in the middle of the Microsoft TEALS Java program, and we’ve just done a picture editor. I got an idea to develop a multi-tool program that edits video and audio programs professionally for those who can’t afford $2,000 in editing programs but demand all the tools. I’ve ran into a brick wall with the planning :

  What tools should I put in it ? I want this program to have most, if not all possible ways to change media files (as if I was to combine programs like Audacity, a lot of Adobe programs, etc.)

  I’m learning up FFMPEG and AWT, but I really want to tackle this project’s planning this year, to tackle on the programming in the next two years independently. Yay straightforward freeware* & too much time !

  (I don’t think this post belongs here, but I’m in search of help for I have no budget nor any help [it’s going into culinary])

  Thanks for your time.

• Error : No such filter : '"movie', what's the isssue ?

  16 mars 2019, par uno

  I am using the code to add watermarks to videos on upload for carrierwave-video :

  process encode_video: [:mp4, resolution: "640x480", watermark: {
  
      path: "app/assets/images/logo-nike.jpg",
  
      position: :bottom_right,
  
      pixels_from_edge: 10
  
    }]

  When i use this code, i get error :

  (in short)

  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [AVFilterGraph @ 0x55c8909bf180] No such filter: '"movie'
  
  Error reinitializing filters!
  
  Failed to inject frame into filter network: Invalid argument
  
  Error while processing the decoded data for stream #0:0
  
  Conversion failed!
  
  ):

  my ffmpeg version is 4.1.1

  Is there something missing from ffmpeg i need to install ? I have looked around and found no issues with others using this code (most posts are years old though)

  I found this : No such filter : ’drawtext’

  but isn’t the same thing ?

• I am trying to use the IMA audio encoder and all I get is silence (warning:noob !)

  9 avril 2019, par TerryYim

  o internet !

  As the tree said to the lumberjack, I’m stumped. I downloaded ffmpeg for the first time today and have had quite a lot of fun experimenting with it. So far, I’ve managed to get videos encoded and playing on my Mac OS 9 installation (in Quicktime) using the ’svq1’ video encoder and 16 bit pcm audio. I use this command :

  .\ffmpeg.exe -i .\cat.mp4 -vcodec svq1 -acodec pcm_s16le -ar 44.1k -ac 2 cat_cmon.mov

  However, when I try to switch the audio to adpcm_ima_qt (which I believe is what I should be using for Quicktime 4 - bear in mind that this software is 20 years old) all I get is silence. However, I’m getting silence when I try to play them in Windows too, so I know it’s not the Mac that’s at fault. Here’s what I’m trying to use :

  .\ffmpeg.exe -i .\rivalries.mp4 -vcodec svq1 -acodec adpcm_ima_qt -ar 44.1k -ac 2 rival.mov

  So I’m totally stumped. Am I doing something wrong ? If I am, it’s not something I can see myself. Would anyone be able to lend some wisdom as to how to get the IMA-encoded audio working ?

  Thank y’all !

  ADI.

  Edit : And, just to explain, the reason I want to use adpcm_ima_qt is because PCM is laggy and results in larger file sizes.