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• ffmpeg on linux batch convert multiple files then move each converted file to an external usb storage device [on hold]

  13 octobre 2019, par ind2000

  I want to batch convert multiple files to mp4 using ffmpeg on my MX-Linux thin client machine. Due to low storage on the machine (8gb), and the fact to continuously writing data to usb device by ffmpeg make the device to be sometime corrupted or unreadable, i want to :

  • convert each file to mp4 output on the thin clien storage,
  • then move the converted file to an external usb storage device, to make place for other convertion processes.

  i used this :

  for i in *.avi; do ffmpeg -i "$i" -c:v libx264  -c:a aac  -y "/home/mymx/Videos/${i%}.mp4"; mv "/home/mymx/Videos/${i%}.mp4" /media/mymx/MYUSB/folder2 done

  but no avail, just new line.

  is there a way to have a shell script file on linux to do that ?

  i hope i am so clear with my question , i am not a linux guru , thanks !

• Concatenating two audio files, keeping the channel count of the second file

  6 septembre 2019, par Jon H

  I am attempting to concatenate two MP3 files into a single MP3 file. So far this has worked fine with the following command :

  ffmpeg -y -i "first.mp3" -i "second.mp3" -c:a libmp3lame -qscale:a 1 -filter_complex "[0:0][1:0]concat=n=2:v=0:a=1[outa]" -map "[outa]" combined.mp3

  I wish to keep the channel count of the second input. For example, the first input is always mono, but if the second channel is stereo, I wish the output to be stereo. This command appears to always output the same channel count as the first input.

  I have tried reversing the order of the inputs, and reversing the mapping of the concat filter, but this had the same result.

  Any ideas ? Thanks.

• How to generate m3e8 file from mp4 files (Not from list)

  4 août 2019, par David Najaryan

  I need to generate m3e8 file from mp4 videos

  I have code to do it

  ffmpeg -i "D:/12.mp4" -profile:v baseline -level 3.0 -s 640x360 - 
  
  start_number 0 -hls_time 10 -hls_list_size 0 -f hls -hls_flags append_list 
  
  "D:/testff/index.m3e8"

  But when i run script to stream this file to facebook i get many errors

  ffmpeg -re -i "D:/testff/index.m3e8" -acodec libmp3lame -ar 44100 -b:a 
  
  128k -pix_fmt yuv420p -profile:v baseline -s 426x240 -bufsize 6000k -vb 
  
  400k -maxrate 1500k -deinterlace -vcodec libx264 -preset veryfast -g 30 -r 
  
  30 -f flv "rtmps://live-api-s.facebook.com:443/rtmp/1370514463086508? 
  
  s_bl=1&s_ps=1&s_sml=0&s_sw=0&s_vt=api-s&a=AbwMpTgugervvv6i"

  P.S. I need to dynamically add video files

  Thanks