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• First image not showing image to video using ffmpeg

  3 octobre 2014, par death_relic0

  I am very new to ffmpeg and trying to convert a series of images to a video.

  The command I am using (copied/modified from a tutorial)

  ffmpeg -framerate 1/5 -start_number 1 -i dog%01d.jpg -c:v libx264 -r 30 -pix_fmt rgb24 dog.mp4

  Basically, I have 4 images labelled dog1.jpg, dog2.jpg, dog3.jpg and dog4.jpg.

  The problem is the output video I get has image starting at "dog2.jpg" and ending at "dog4.jpg" meaning that it is missing the first image in the sequence (i.e dog1.jpg).

  I tried with different image combinations and the same behavior happened, the resulting video never had the first image in the sequence.

  Any ideas ?

• How can I resize an overlay image with ffmpeg ?

  28 novembre 2020, par Andrei Dascalu

  I am trying to add an overlay to a video using the following command

  


  ffmpeg -y -i "$videoPath" -i "$overlayPath" -filter_complex "[0:v] [1:v] overlay=$overlayPosition" -pix_fmt yuv420p -c:a copy "$outputPath" 


  


  However, I would like to be able to resize the overlay I am about to apply to some arbitrary resolution (no care for keeping proportions). However, although I followed a couple of similar solutions from SO (like FFMPEG - How to resize an image overlay ?), I am not quite sute about the meaning of the parameters or what I need to add it in my case.

  


  I would need to add something like (?)

  


  [1:v]scale=360:360[z] [1:v]overlay=$overlayPosition[z]


  


  This doesn't seem to work so I'm not sure what I should be aiming for.

  


  I would appreciate any assistance, perhaps with some explanation.

  


  Thanks !

  


• Converting bin&amp format to mp4 with ffmpeg fails

  31 octobre 2017, par Vincent

  I am trying to download videos from Wistia and I managed to download them but in .bin&amp format ; I’d like to convert them to .mp4 in order to use OpenCV. For this I am calling ffmpeg with subprocess on Python but I get 1 as the value for the return code, meaning the process has failed. Any idea why, and how I can change this...?

  Code is the following :

  import subprocess
  
  
  
  infile = filename #a bin&amp file
  
  outfile = filename[:-7]+'mp4'
  
  
  
  subprocess.run(['ffmpeg', '-i', infile, outfile],shell=True)

  I get :

  CompletedProcess(args=['ffmpeg', '-i', '58c63bccfcc1c150646c261caad97a58ced4b5e3.bin&amp', '58c63bccfcc1c150646c261caad97a58ced4b5e3.mp4'], returncode=1)

  Also, it works in the command prompt...

  Thank you for your help,

  Sincerely,