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• Can FFMPEG perform Sample-aes encryption ?

  2 août 2018, par david

  I’m trying to convert a local .mp4 video to encrypted HLS AES-128 with ffmpeg. I would like to implement SAMPLE-AES in order to have a playlist looking like this : (one key per segment as opposed to one key for the whole set of segments)

  > #EXT-X-KEY:METHOD=AES-128,URI="segment-00000.key"
  
  > 
  
  > #EXTINF:4.458667, segment-00000.ts
  
  > #EXT-X-KEY:METHOD=AES-128,URI="segment-00001.key"
  
  > 
  
  > #EXTINF:4.010000, segment-00001.ts
  
  > #EXT-X-KEY:METHOD=AES-128,URI="segment-00002.key"
  
  > 
  
  > #EXTINF:4.458667, segment-000002.ts
  
  > #EXT-X-KEY:METHOD=AES-128,URI="segment-00003.key"
  
  > 
  
  > #EXTINF:4.010000, segment-00003.ts

  But I have not found yet how to do it... even in the ffmpeg documentation...

• How to change sample rate in FFMPEG

  23 décembre 2016, par John_D

  I use FFMPEG since few moments now and after asking for help here a first time about that, i was able to discover this command line that i use since then, for the conversion of .MP4 video to .FLV : ffmpeg -i namefile.mp4 -c:v libx264 -crf 19 destinationfile.flv .

  The results was simply amazing ! Perfect video and a lot less space needed. But i’ve try this same line for a new video and didn’t work.

  This is what appears to me :

  [libmp3lame @ 03eaf5a0] flv does not support that sample rate, choose from (44100, 22050, 11025).

  After that, i’ve try theses commands lines

  ffmpeg -i in.mp4 -c:v libx264 -b:v 500k -c:a copy out.flv 
  
  ffmpeg -i in.mp4 -c:v libx264 -ar 22050 -crf 19 out.flv

  Without succes. So right now i just dont know what to do else to be able to convert this MP4 file to a FLV one, who is smaller in size and keep a perfect image, just like the others conversions made with the first code line before.

  Thanks for your help !

• FFmpeg command to loop an audio starting from a sample twice and add a fade out

  27 juin 2022, par Victor Lopes

  I have some audio files and I want to use FFmpeg to loop them twice, but starting from a given sample (I have the sample numbers), and add a 5 seconds fade-out at the end. The output has to be a video : a static .png on the same folder with the audio playing on top of it (copying the same audio codec to preserve the quality).

  


  For example, for this input audio I am supposed to get this output video. Here I used Audacity to loop and fade the audio starting from the sample 43190, and the following FFmpeg command to add the image to it :

  


  ffmpeg -r 1 -loop 1 -i "Sonic 3 Tile.png" -i "Angel Island Zone Act 1 - LOOP.ogg" -acodec copy -r 1 -shortest -vf scale=1280:1280 "Angel Island Zone Act 1.mkv"


  


  The thing is, I want to be able to do it all at once, using FFmpeg to loop and fade instead of Audacity. Is it possible ? If so, what command should I use ? Just a reminder, the audio has to be looped twice.