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• FFMPEG - Add (white, color-less, analog) grain to the video without desaturating video itself

  2 décembre 2018, par dd_code

  I am working on old videos where I am basically converting them to HVEC and sharpening, so i.e. my command can look like this

  .\ffmpeg.exe -i F:\file.mkv -vf unsharp=3:3:1.5 -c:v hevc_nvenc -qp 27 -a:c copy file_new.mkv

  inherent problem with this is, of course that with reducing bitrate and sharpening every now and then I can notice some nasty artifacts around the edges and on at plain-color objects.

  I noticed with some older, many times remastered movies/series that they have quite a lot of grain in the video, so I was thinking - what if I add grain and help it to mask the compression and sharpening artifacts ?

  After bit of searching I got to
  https://ffmpeg.org/ffmpeg-filters.html#noise
  and now I am using this command

  .\ffmpeg.exe -i F:\file.mkv -vf unsharp=3:3:1.5,noise=alls=14:allf=t+u -c:v hevc_nvenc -qp 30 -a:c copy file_new.mkv

  however this has one big problem, it is merely a digital RGB noise, is there a way to make it desaturated, analog-ish ? I tried adding h=s=0, however this is applying 0 saturation to the video track as a whole. Is there an effect which would achieve this or is there a way that I can reduce the saturation only of the very effect which then gets to "overlay" the video track, so the track would not be touched ?

• AttributeError : '_io.BytesIO' object has no attribute 'endswith' when attempting to check audio and video codec from base64 video file in Django

  12 novembre 2023, par mahmudsajib

  I'm currently working on a Django project where I need to check the audio and video codec of a base64-encoded video file. To achieve this, I've implemented a function that decodes the base64 string into binary data and then attempts to load the video clip using MoviePy. However, I'm encountering an AttributeError : '_io.BytesIO' object has no attribute 'endswith' when trying to run the code.

  


  Here's the relevant part of the code :

  


  import base64
from io import BytesIO
from moviepy.editor import VideoFileClip

def get_video_codec_info(base64_data):
    # Decode base64 string into binary data
    _format, _file_str = base64_data.split(";base64,")
    binary_data = base64.b64decode(_file_str)

    # Load the video clip using MoviePy
    clip = VideoFileClip(BytesIO(binary_data))

    # Get information about the video codec
    codec_info = {
        'video_codec': clip.video_codec,
        'audio_codec': clip.audio_codec,
    }

    return codec_info


  


  The error occurs at the line clip = VideoFileClip(BytesIO(binary_data)) and it seems related to the use of BytesIO. I've tried to find a solution, but I'm stuck at the moment.

  


  Any suggestions on how to resolve this issue or alternative approaches to check the audio and video codec of a base64-encoded video file in Django would be greatly appreciated. Thanks !

  


• converting one video file to another video file with sound from ffmpeg using vc++2010 [closed]

  18 février 2013, par user2047514

  I am devloping a application that convert one video to another including sound (means in source file has video as well as sound) with the help of FFMPEG Librrary. I have created a video. But sound is not availabe in converted video. so please help me how can i fix this issue. I am sending You link .

  FFmpeg not honoring bitrate for different containers ?
  i have used this code for doing my work but sound is not availble. so please help my how can we handle this situation.

  Thanks for your cooperation
  Waiting your response.