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• How to Play Smooth 4K Video with FFplay ? [closed]

  14 mai 2020, par Matan Marciano

  Im trying to play 4K video with ffplay and the video is not smooth.

  



  Video File :

  



  

  • Big Buck Bunny, 4K, 60fps, 30Mbps

  


  • http://distribution.bbb3d.renderfarming.net/video/mp4/bbb_sunflower_2160p_60fps_stereo_abl.mp4

  


  



  Hardware :

  



  

  • Dell OptiPlex 7070 Micro (8 Cores, 8GB RAM, GPU : Intel Corporation UHD Graphics 630)

  


  • Samsung U28E590D, 4K Screen

  


  • DisplayPort to HDMI Cable

  


  



  Software :

  



  

  • Ubuntu 19.04

  


  • ffplay with libmvx (according this guide : https://github.com/Intel-Media-SDK/MediaSDK/wiki/Build-and-use-ffmpeg-with-MediaSDK)

  


  



  The FFplay command I used is : ffplay -vcodec h264_qsv -i input.ts

  



  

  • Notes :

  


  • During the playing, my CPU usage is around 25% (according to 'top' command)

  


  • FFplay logs indicate on many frame drops

  


  • I also tried VLC and MPV player's- VLC looks bad also. MPV player looks better but still not smooth.

  


  



  So, its looks like my hardware is good enough for 4K playing. What am I missing ?
How can I play smooth 4K video via FFplay ?

  


• converter.ConverterError : Source file doesn't exist

  13 mai 2020, par Emin Baybars Timur

  I am a newbie of using PyCharm and I am trying to convert an AVI file an MP4 file.

  



  I have a code like this.

  



  from converter import Converter

conv = Converter()

info = conv.probe(r'C:\Users\bayba\anaconda3\Lib\site-packages\converter\MVI_0117_normal_meannorm.avi')

convert = conv.convert('MVI_0117_normal_meannorm.avi', 'normalvideo.mp4', {
    'format': 'mp4',
    'audio': {
        'codec': 'aac',
        'samplerate': 11025,
        'channels': 2
    },
    'video': {
        'codec': 'hevc',
        'width': 720,
        'height': 400,
        'fps': 25
    }})


for timecode in convert:
  print(f'\rConverting ({timecode:.2f}) ...')


  



  I am having an error called :

  



  


  converter.ConverterError : Source file doesn't exist :
 MVI_0117_normal_meannorm.avi

  


  



  And in the library, the problem is being triggered from this line of code..

  



  if not os.path.exists(infile):
    raise ConverterError(f'Source file doesn\'t exist: {infile}')


  



  I did copied the video in the project file but I am still having this error.

  


• ffmpeg neighbor resize giving distortion when resizing video game footage. 2x2 pixels converted to 3x3 don't hold their color and are pixelated

  12 avril 2020, par PixelFrustated

  Here is my ffmpeg code :

  



  ffmpeg -i C :\FFMPEG\bin\input.mp4 -vf "scale=-2:1080" -sws_flags neighbor -c:v libx264 -crf 0 -preset Slow -c:a copy -b:a 320k C :\FFMPEG\bin\VIDEO2_1080p.mp4

  



  I'm converting a 720p video to 1080p. The game is 2x2 pixels and when I do the conversion they should be flat 3x3 pixels but instead they come out with slight miscolors on the insides between the pixels and their color is slightly off.

  



  Can anyone help me figure out why this warped ?

  



  Pixels on the left are 2x2 and are converted to the pixels on the right.

  



  Instead of 2x2 expanding out to a 3x3 it takes a weird blend going vertical but the horizontal pixels are just fine.