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• x264 on Ubuntu video bad/corrupted

  6 septembre 2013, par Ryzone

  I am trying to use command line x264 to produce a blu-ray compatible file for use in Adobe Encore. For the source file I've tried both ProRes and mpeg2, both 1080p24. Both files import into Encore fine (no transcoding needed which is great) but the ProRes version is pink and grey "static" and the mpeg2 is just a bunch of green/black lines. The exact same files and the exact same commands on my Win7 PC come out fine. I'm only doing a 10 sec sample of the complete 90min movie. I'd love for it to work on Ubuntu cause it is running a new i7 haswell that encodes much quicker than my PC (many hours difference in encoding time)

  Ubuntu 13.04
  
  
  
  x264 0.135.2 f0c1c53<br />
  
  built on Jul 24 2013, gcc: 4.7.3<br />
  
  configuration: --bit-depth=8 --chroma-format=all<br />
  
  x264 license: GPL version 2 or later
  
  
  
  command:
  
      x264 --bitrate 30000 --preset veryslow --tune film --bluray-compat --fps 24000/1001 --force-cfr --bframes 3 --ref 4 --muxer raw --no-weightb --weightp 0 --b-pyramid none --vbv-maxrate 40000 --vbv-bufsize 30000 --level 4.1 --profile high --keyint 24 --min-keyint 1 --open-gop --slices 4 --colorprim "bt709" --transfer "bt709" --colormatrix "bt709" --sar 1:1  -o output.264 --input-res 1920x1080 sample.mov

  (if it would work I'd be doing two pass encoding)

  I am able to encode the sample file with ffmpeg to h264 (if that helps).

• How to use ffmpeg to upscale video resolution with anime4k ?

  29 juillet 2023, par Ironbox

  In Vapoursynth, it is convenient to download and use plugins to change the frame rate of videos. However, it seems that using FFmpeg has more limitations (or maybe I haven't found the right method). Anime4K is a video enhancement algorithm suitable for anime and similar videos. In MPV, their plugins can be imported and used for real-time frame rate conversion.

  


  In FFmpeg, how can I use the algorithms in glsl files to change the video frame rate, instead of using FFmpeg's built-in algorithms ?

  


  In FFmpeg, i can use libplacebo filters can also be used to apply GLSL shaders. In my tests, using command like :

  


  libplacebo=custom_shader_path=Anime4K_Upscale_CNN_x2_VL.glsl


  


  this leads to noticeable GPU usage, but the output video resolution remains the same as the original.

  


  I can pass in the w and h parameters when calling the libplacebo filter :

  


  libplacebo=w=iw*2:h=ih*2:custom_shader_path=shaders/Anime4K_Upscale_CNN_x2_VL.glsl


  


  This achieves the purpose of super resolution, but is it essentially using anime4k for upscaling behind the processing ?
Is it using the upscaling algorithm in libplacebo first, before applying anime4k ? How can I achieve my original goal that only use anime4k to upscale ?
here's my full command (in python) :

  


  [
    'ffmpeg -hide_banner',
    '-hwaccel', 'cuda',
    '-i', '"{input_ab_path}"',
    '-filter_complex',
    '"[0:v]libplacebo=custom_shader_path=libplacebo=custom_shader_path=shaders/Anime4K_Upscale_CNN_x2_VL.glsl,subtitles="{sub_file}":si=0[out]"',
    '-map', '0:a',
    '-map', '"[out]"',
    '-c:v', 'libsvtav1',
    '-svtav1-params', 'scm=2:scd=1:enable-overlays=1:enable-tf=0:tune=0:preset=7:crf=18',
    '-c:a', 'libvorbis',
    '-qscale:a', '10',
    '-pix_fmt', 'yuv420p10le',
    '-y', '"{output_ab_path}"'
]


  


• How to use ffmpeg to upscale video resolution with libplacebo ?

  30 juillet 2023, par Ironbox

  In Vapoursynth, it is convenient to download and use plugins to change the frame rate of videos. However, it seems that using FFmpeg has more limitations (or maybe I haven't found the right method). Anime4K is a video enhancement algorithm suitable for anime and similar videos. In MPV, their plugins can be imported and used for real-time frame rate conversion.

  


  In FFmpeg, how can I use the algorithms in glsl files to change the video frame rate, instead of using FFmpeg's built-in algorithms ?

  


  In FFmpeg, i can use libplacebo filters can also be used to apply GLSL shaders. In my tests, using command like :

  


  libplacebo=custom_shader_path=Anime4K_Upscale_CNN_x2_VL.glsl


  


  this leads to noticeable GPU usage, but the output video resolution remains the same as the original.

  


  I can pass in the w and h parameters when calling the libplacebo filter :

  


  libplacebo=w=iw*2:h=ih*2:custom_shader_path=shaders/Anime4K_Upscale_CNN_x2_VL.glsl


  


  This achieves the purpose of super resolution, but is it essentially using anime4k for upscaling behind the processing ?
Is it using the upscaling algorithm in libplacebo first, before applying anime4k ? How can I achieve my original goal that only use anime4k to upscale ?
here's my full command (in python) :

  


  [
    'ffmpeg -hide_banner',
    '-hwaccel', 'cuda',
    '-i', '"{input_ab_path}"',
    '-filter_complex',
    '"[0:v]libplacebo=custom_shader_path=libplacebo=custom_shader_path=shaders/Anime4K_Upscale_CNN_x2_VL.glsl,subtitles="{sub_file}":si=0[out]"',
    '-map', '0:a',
    '-map', '"[out]"',
    '-c:v', 'libsvtav1',
    '-svtav1-params', 'scm=2:scd=1:enable-overlays=1:enable-tf=0:tune=0:preset=7:crf=18',
    '-c:a', 'libvorbis',
    '-qscale:a', '10',
    '-pix_fmt', 'yuv420p10le',
    '-y', '"{output_ab_path}"'
]