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• Removing / Overlaying logo on mp4 video format with ffmpeg on linux

  12 septembre 2020, par SilverShadow

  I'm trying to remove a logo from an .mp4 video file with ffmpeg on linux machine without re-encoding (for preserving the same quality) with the following command :

  


  ffmpeg -i input.mp4 -vf delogo=x=270:y=190:w=40:h=40 -c:a copy output.mp4 


  


  and it gives me the following errors :

  


  Unrecognized option 'vf'


  


  then a new error came up :

  


  Unable to find a suitable output format for 'delogo=x=270:y=190:w=40:h=40'


  


  ffmpeg is always updating and it seems that they change command line arguments a lot so any material or tutorial I find online seems to get outdated quickly ...

  


  I reviewed the documentation but can't get it to work, I think I'm missing something...?

  


  So : What is the correct command line in linux shell ? Also, how to view or find out the exact coordinates of the area to be removed before actually removing the logo ? And how can I overlay a solid color in a certain area instead of removing the logo transparently ?

  


• how ffmpeg work on server for different type of users example window mac linux [on hold]

  5 août 2016, par sam

  I have a question about ffmpeg and i am using mac and xampp and php and jquery and i make a function that upload video or image file or another type and i when i saw examples of ffmpeg in stackoverflow. that seems to be confusing but my questions are

  1. client can be window user or mac or another than we have to download all different type of ffmpeg file for example ffmpeg.exe and mac can be another because when i saw how to download ffmpeg than they show me different operating system.

  2. And where we have to save ffmpeg file in xampp and how

  3. If i download all things for mac and i run it and it works and i make my website online and than any window user or linux user will upload video it will work for him also. But we donot client download ffmpeg in their system

  Please help me that is my question and if anybody know good example of create thumbnail for video please tell me

  thankyou i will wait for your reply

• Converting dolby vision + lossless audio mkv to higher compatibility mp4 using ffmpeg

  28 septembre 2023, par Infinity

  I want to convert mkv to mp4 for the following reasons.

  


  Mkv files do not trigger dolby vision on an LG OLED A1 but mp4 files do.

  


  Lossless TrueHD with Atmos audio and DTS-HD MA audio are not supported by LG A1 OLED.

  


  I would like guidance on what commands need to be used to to perform a conversion that keeps all original audio and subtitle tracks of different languages and file formats.

  


  I have had some success with a reddit post converting mkv files that have dolby vision and eac3 with atmos tracks to mp4 maintaining dolby vision and atmos data but I lose all subtitle tracks and only one audio track is converted other languages and tracks lost.

  


  I have not been able to find information online regarding going from DTS-HD MA or TrueHD with atmos to eac3 with atmos or any other supported format by LG A1 OLED.