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• My ffmpeg library is not being recognised as in inter or external command when trying to convert a video in python [duplicate]

  22 avril 2024, par Shaahid Patel

  What im trying to do in python is to convert a 4k mkv video to 1080p mp4 video using the ffmpeg library.

  


  import subprocess

def convert_4k_to_1080p(input_file, output_file):
    cmd = f'ffmpeg -i "{input_file}" -crf 18 -c:v libx264 -c:a aac -s 1920x1080 "{output_file}"'
    subprocess.run(cmd, shell=True)


input_file = "c:/Users/Shaahid/Videos/Movies/Series/Arcane.S01E02.2021.2160p.UHD.WEB.AI.AV1.Opus.MULTi5-dAV1nci.mkv"
output_file = "c:/Users/Shaahid/Videos/Movies/Series/Test.mp4"
convert_4k_to_1080p(input_file, output_file)


  


  however i have been recieving the following error :
'ffmpeg' is not recognized as an internal or external command,
operable program or batch file.

  


  I was expecting my video to be converted from 4k to 1080p however I still get errors. I have tried deleted and re installing the library through pip but unfortunately the error still occurs. Im not sure what to do and can anyone kindly assist me

  


• How to extract orientation information from MOV videos created on the iPhone using ffmeg, ruby or objectivec ?

  5 octobre 2014, par Sid

  After surfing through tons of documentation on the web it seems that the iPhone always shoots the video at a 480x360 aspect ratio and applies a transformation matrix on the video track. (480x360 may change but its always the same for a given device)

  Here is a way of modifying the ffmpeg source within a iOS project and accessing the matrix http://www.seqoy.com/correct-orientation-for-iphone-recorded-movies-with-ffmpeg/

  Here is a cleaner way of finding the transformation matrix in iOS-4
  how to detect (iphone sdk) if a video file was recorded in portrait orientation, or landscape

  How can the orientation of the video be extracted in either of the options below -
  
   iOS 3.2
  
   ffmpeg (through the command line server side)
  
   ruby
  

  Any help will be appreciated.

• FFMPEG - Concat videos with audio not working

  9 février 2019, par S.T

  i have a command that takes 2 movies, each one needs to be 2-3 times in a loop, and then show them in one video side by side.
  my problem is that the loop is not working, i see the movies side by side (with both audio) which is great but only one time each movie, not in a loop. the concat command is not working...
  the Command is :

     ffmpeg -i in1 -i in2  -filter_complex, \
  
     "[0:v:0][0:a:0][0:v:0][0:a:0]concat=n=2:v=1:a=1[concat1v][concat1a];\
  
     [concat1v]fifo,pad=width=iw+20:height=ih+20:x=10:y=10:color=green[a];\
  
     [1:v:0][1:a:0][1:v:0][1:a:0][1:v:0][1:a:0]concat=n=3:v=1:a=1[concat2v] 
  
     [concat2a];\
  
     [concat2v]fifo,pad=width=iw+20:height=ih+20:x=10:y=10:color=red[b];\
  
     [a][b]hstack=inputs=2[video];\
  
     [concat1a][concat2a]amerge=inputs=2,pan=stereo|FLcode>

  the log is at
  https://pastebin.com/iy4n2MFZ