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• FFMPEG - moov atom not found after elaboration

  8 juillet 2019, par Pier Giorgio Misley

  I have a command where I put overlay images over a video.
  After that I resize the output to fit certain dimensions.

  Everything usually works fine, but sometimes and only from a certain desktop computer, when the second elaboration starts, the command returns an error : moov atom not found

  Lets put some code :

  My first command is pretty long, I past just the important stuff with a 2 pictures example :

  -i inputVideo.mp4 -i 1.jpg -i 2.jpg
  
  -filter_complex "[1:v]format=yuva422p,[Other effects...][im1];
  
  [2:v]format=yuva422p,[Other effects...][im2];
  
  [0][im1]overlay=(main_w-overlay_w)/2:(main_h - overlay_h)/2[o1];
  
  [o1][im2]overlay=(main_w-overlay_w)/2:(main_h - overlay_h)/2"
  
  -crf 18 -c:a copy output.mp4

  My second command is the following :

  -i output.mp4 -crf 19 resized.mp4

  I think I am missing something in my first command, but what ?
  If I execute the same exact code from my portable computer, it works fine.

  Thanks for the help !

  Here is the link for both log ffmpeg logs

  Last edit (I hope) :)

  I added in that github repository the ffmpeg command I tried and the source files to reproduce the problem. I hope anyone will ever find a solution

  In the repository there are :

  • LAST_CommandLine_Command -> it’s the ffmpeg command I am running
  • LAST_CommandLine_Command_Output -> it is one of my ffmpeg’s run output (it’s the last I’ve tried)
  • Files from 01.jpg to 10.jpg -> those are the pictures I’m overlaying over the video with the command
  • My input video for the ffmpeg command.

  I tried running this command with :
   A Windows console application that run it for me
   Directly from command line
   With a command line dotnet myapplication.dll (running my application not from debug but from publish)

  Results :

  It worked 1 times out of 10 for those specific files, in other cases it randomly stopped after some seconds (fron 45’’ to 1’55’’, depending on run).

  Note : I tried with -threads 1, -threads 2 and without any thread limitation. It failed in all cases

• how to get interval frames and key frames by ffmpeg with one command ?

  17 janvier 2023, par shsf

  I need to get the pictures of the video with one command.

  


  

  1. gets a frame by interval ;For example 0s 10s 20s 30s ... ;In order to generate sprites
sprite

  


  2. gets a keyframe at a fixed interval ; In order to show the video synopsis ;

  


  


  How to modify the following commands ?

  


  ffmpeg -y  -ss -5  -i   <input />  -vf  fps=fps=1/10  -s 480x270   p1/out-%04d.png -vf "select=&#x27;eq(pict_type,PICT_TYPE_I)&#x27;" -vsync vfr -s 480x270 -frame_pts true p2/out-%05d.png

  


• Fully scraping m3u8 with ffmpeg without recoding

  12 novembre 2022, par gsemyong

  There is a manifest living on the server (index.m3u8) containing data about child manifests (for different video qualities) which in turn contain segment names. Is it possible to provide to ffmpeg (or any other tool) url of index.m3u8, to get all index.m3u8, child manifests and video segments, preserving playlist structure and files as is (that means without recoding, etc.) ?

  


  Thank you in advance !

  


  I tried searching for different flags. There is an option to download segments without recoding, but the names and manifests are not preserved. Tried to find a tool to generate manifests from existing segments based on different rules - didn't find any. I think I can always reserve to writing manifests generation from scratch, but would like to avoid it :)