Recherche avancée

Sur d’autres sites (2624)

• How to create m3u8 playlist from mp4 video url ( stored in amazon S3 ) and store the video chunks ( .ts files) and .m3u8 file back to another S3 ?

  19 mai 2019, par dexter2019

  I am building an application where user can upload video and others can watch them later. I am aiming for HLS streaming of the video on the client side, for which the video format should be .m3u8. I am using node fluent-FFmpeg module to do the processing, however, I have a huge doubt, that, how to ensure that all the .ts files (chunks) are also stored back in s3 bucket along with the m3u8 file after ffmpeg processed the mp4 file ?

  Because the ffmpeg command only takes the location of the m3u8 file ? How handle it when I want the input and output location to be S3 ?

  Any help will be greatly appreciated.

  I am following the answer from this question Ffmpeg creating m3u8 from mp4, video file size , which is working absolutely fine in my local machine, how to achieve the same for s3 ?

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and it seems that they change command line arguments a lot so any material or tutorial I find online seems to get outdated quickly ...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

  


• Discrepancy in Video Quality with FFmpeg Encoding on Different Laptops [closed]

  17 juillet 2024, par sonusi

  I’m experiencing an issue where encoding the same video with identical FFmpeg commands on two different laptops results in different output quality. Here’s the command I’m using :

  


  ffmpeg -hwaccel none -loglevel verbose -i test_video.mp4 -r 30 -c:v libx264 -profile:v baseline -level 1.0 -b:v 10000k -s 1920x1080 -preset medium -force_key_frames "expr:gte(t,n_forced*1/30)" -c:a aac -b:a 32k -ac 1 -ar 22050 ENC_test_video.mp4



  


  Both laptops are running VirtualBox 7.0 with the same virtual machine configuration. However, one laptop produces a clear and high-quality encoded video, while the other results in a noisy and lower-quality output.

  


  Details :
VirtualBox Version : 7.0
Operating System inside VMs : Ubuntu 20.04

  


  I’ve ensured that both systems have the same FFmpeg version, yet the output quality differs. What could be causing this discrepancy, and how can I ensure consistent video quality across both systems ?

  


  Thanks in advance for your help !