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• I want to reduce video file size but still have a good video quality, how should I write the code using ffmpeg ?

  9 décembre 2019, par Inibuat Maengame

  First of all, I’ve downloaded some videos to watch, and each file has more than 500MB file size. But due to the vast amount of videos I have at the moment, my 3 external hard drives are crying.
  Up till today, I’ve been using BENCOS to reduce the size...
  I always set the preset to very slow, codec h264, profile : high, and the mode is (probably) fixed bitrate on 736kbps.
  With those settings,
  I was able to reduce the size from 400-600MB into 100-110MB with acceptable video quality.
  But, since BENCOS has stopped its service since ages ago, I’ve been trying FFmpeg lately.

  Using those same settings, -crf 22, -preset veryslow, profile:high, the file size doesn’t really reduce that much... from 500MB to 200MB-ish with a much lower video quality compared to BENCOS.

  How are you guys able to reduce the file size by a huge margin compared to the original but still retain the quality using FFmpeg..?
  what commands I should put into the FFmpeg to get a result as good as BENCOS..?

  Thanks in advance...

• Restrict FFmpeg/FFserver stream to logged user

  11 juillet 2018, par Homero Bonomini

  I have a live feed setup with FFmpeg streaming audio/video from a webcam through a FFserver. Also, I have a Apache server running a website with a login page, all on the same machine.

  The question is : how can I protect this live stream over a user authentication, so that my camera doesn’t go public ?

  The goal is to provide the resource over http://myexternalip/camera-for-auth-user, for example. The login routes are working fine, but anyone with the stream link (e.g. http://myexternalip:1099/camera.webm) can watch the stream.

  In the website adding a video element with a local reference, after a user authentication :

  <video controls="controls">
  
  </video>

  obviously fails, since the remote client tries to access the resource on itself. However, I think some sort of local redirect, or maybe don’t use FFServer at all, would meet my needs, but I couldn’t manage to find out how.

• Remove black bars from DV video using ffmpeg [closed]

  2 juillet 2020, par AustinMaxi1750

  I have copied all my Panasonic DV videos (PAL) from the 1990s to my PC as 'dv avi' using Windows movie maker in the original quality (approx 13GB per hour of video).

  


  At the time the recordings were made I set the Panasonic camera to 16:9. However searching various forums indicates it was an illusion of 16:9 and black bars were superimposed on the 4:3 picture to give a cinematic feel. I have read also that the DV pixels are not square.

  


  As a result all my 16:9 recordings have black bars at the top and bottom when viewed on a 16:9 monitor. The file properties are as follows :

  


  Frame width : 720
Frame height : 576

  


  Is there a code in ffmpeg to remove the black bars ?

  


  I attach an example of what I have :
image with black bars

  


  and an example of what I want to achieve :
image without black bars

  


  I also want to convert the format without loss of quality so I can watch the videos without the black bars on a modern smart TV. My TV cannot play back DV AVI.