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• Merge 3 ffmpeg audio tracks into one file without normalized audio

  29 juillet 2022, par Meh.

  I'm trying to essentially get the command line version of dropping files into Audacity, where they all start at the same time and when I export it, it will export as one file.

  


  I'm using this command ffmpeg -i <file> -i <file> -i <file> -filter_complex amix=inputs=3 <out></out></file></file></file> from another question and it makes the audio/end product softer. I can definitely tell a difference without any checking. I am working with files from the musdb18 database so I can make instrumentals manually for a project.

  


  How can I combine multiple audio files without ffmpeg doing something weird like changing the db or normalizing the audio ?

  


• ffmpeg neighbor resize giving distortion when resizing video game footage. 2x2 pixels converted to 3x3 don't hold their color and are pixelated

  12 avril 2020, par PixelFrustated

  Here is my ffmpeg code :

  



  ffmpeg -i C :\FFMPEG\bin\input.mp4 -vf "scale=-2:1080" -sws_flags neighbor -c:v libx264 -crf 0 -preset Slow -c:a copy -b:a 320k C :\FFMPEG\bin\VIDEO2_1080p.mp4

  



  I'm converting a 720p video to 1080p. The game is 2x2 pixels and when I do the conversion they should be flat 3x3 pixels but instead they come out with slight miscolors on the insides between the pixels and their color is slightly off.

  



  Can anyone help me figure out why this warped ?

  



  Pixels on the left are 2x2 and are converted to the pixels on the right.

  



  Instead of 2x2 expanding out to a 3x3 it takes a weird blend going vertical but the horizontal pixels are just fine.

  


• Laravel Jobs (redis/database) + FFMpeg = application/octet-stream

  20 avril 2019, par Andreas

  I discovered something very strange. Whenever I try to use FFMpeg within a queue using redis or database, my converted videos always turn out with MIME "application/octet-stream".

  Here is the weird part. When I use the exact same code, and change the QUEUE_CONNECTION to sync instead, my videos gets converted to "video/webm" just as instructed.

  Does anyone have a clue as to why this is happening ? I have also tried multiple approaches converting, with laravel-ffmpeg and php-ffmpeg. Now I am using regular ol’ exec("ffmpeg").

  Thanks in advance !