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• High quality compression with cuda

  6 février 2020, par Alex

  I want to convert

  ffmpeg -i input.mp4 -maxrate 63317762 -bufsize 63317762 -map_metadata -1 -vcodec libx265 -c:a copy -crf 28 -color_range 2 output.mp4

  into a command that uses cuda to speed the conversion process.

  I tried

  ffmpeg.exe -hwaccel cuvid -i input.mp4 -pix_fmt p010le -c:v hevc_nvenc -preset slow -rc vbr_hq -b:v 6M -maxrate:v 63317762 -bufsize:v 63317762 -c:a aac output.mp4

  And it didn’t work.

  I tried

  ffmpeg.exe -hwaccel cuvid -i input.mp4 -c:v hevc_nvenc -preset slow -rc vbr_hq -b:v 6M -maxrate:v 63317762 -bufsize:v 63317762 -c:a aac output.mp4

  and it worked, yet it set the bitrate for video to 6M.

  I want ffmpeg to guess it based on content up to 63317762 bytes. Like a good tradeoff between quality and bitrate but below 63317762 bytes but also without visible block building and blurryness.

  And with cuda.

  Which command does that ?

• Generating High Quality Video from Images with Audio and Transistions(C#)

  18 octobre 2016, par M Imtiaz

  I am Making a Windows Application to Create a Video from a set of Images, also i want to add Audio and Transition Affects.
  i have searched Over the Internet and Found Some Libraries Like
  AForge.NET(FFMPEG Based), Splicer(https://splicer.codeplex.com/) and FFMPEG itself Command Based here.

  i am able to create video using all of the above libraries but these have certain limitations or may be i dont know the usage
  like

  1) AForge.Video.FFMPEG can create Video but there is no Option to add Audio

  2) FFMPEG Command Based can create Video from Images along with audio but Transitions found were only Fade In, Fade out(http://www.bogotobogo.com/FFMpeg/ffmpeg_fade_in_fade_out_transitions_effects_filters.php)

  3) Splicer.dll is working well it has All the Options for Adding Transitions and Audio but the quality of Video is not satisfactory.

  Now My Questions is how i can achieve my desired quality video along with Transitions and Audio from a set of Images.
  Thank you

• Recommendations about FFmpeg filters to enhance video quality or fixes

  2 juin 2021, par Mapg

  I am developing a web application using FFmpeg, and I would like to know your recommendations about what filters (to be implemented as presets) my users could use to enhance the video image quality and fix the common video problems.

  


  I have in mind for example to use the "Automatic Levels" filter (using "pp=al"), "Audio Level Normalization", some "Denoise" filter, and "Deinterlacing" filter.

  


  But as you can see I only have in mind 4 filters while FFmpeg has a lot of them.

  


  What filters could I add to a Set of Presets for my users ? Something useful. Like a Set of Swiss Army Knife tools.

  


  I am looking forward to hearing your recommendations.

  


  Any other tool or fix is good too, even using other software in the shell. No problem.

  


  Thank you very much in advance !!

  


  Mapg