NVEnc Preview

[Selur]

Works fine here,...

import vapoursynth as vs
from vapoursynth import core
import subprocess
import ctypes

NVEnc = r'F:\Hybrid\64bit\NVEncC.exe'
ffmpeg= r'F:\Hybrid\64bit\ffmpeg.exe'
# Loading Plugins
core.std.LoadPlugin(path="F:/Hybrid/64bit/vsfilters/SourceFilter/LSmashSource/vslsmashsource.dll") # L-SMASH Source is only usable for mp4 and mov files
source_path=r"C:/Users/Selur/Desktop/TestSubs-1.mp4" # current color space: YUV420P8, bit depth: 8, resolution: 720x300, fps: 25, color matrix: 470bg, yuv luminance scale: limited, scanorder: progressive, Note storage resolution is 720x304
source_path=r'G:\TestClips&Co\test.avi' # current color space: YUV420P8, bit depth: 8, resolution: 640x352, fps: 25, color matrix: 470bg, yuv luminance scale: limited, scanorder: progressive
source_path="C:/Users/Selur/Desktop/TestVideo.mp4"

clip = core.lsmas.LWLibavSource(source=source_path, format="YUV420P8", stream_index=0, cache=0, prefer_hw=0)
clip = clip.resize.Bicubic(format=vs.YUV420P16)
w = clip.width
h = clip.height
bitdepth=16
Ysize  = w * h * bitdepth // 8
Usize = w * h//4 * bitdepth // 8
Vsize = w * h//4 * bitdepth // 8
frame_len = Ysize + Usize + Vsize #YUV420

command = [NVEnc,
                 '--avhw',
                 '--input "'+source_path+'" '
                 '-c raw',
                 '--output-res '+str(w)+'x'+str(h),
                 '--output-csp yuv420p',
                 '--output-depth '+str(bitdepth),
                 '--output-format raw',                
                 '--output -',          
             ]
command = [ ffmpeg, '-i', source_path,'-vcodec', 'rawvideo', '-pix_fmt', 'yuv420p16',  '-f', 'rawvideo', '-']            
command = ' '.join(command)

core.log_message(2,command)

pipe = subprocess.Popen(command, stdout = subprocess.PIPE, bufsize=frame_len)

def load_frame(n,f):
    try:
        vs_frame = f.copy()
        for i, size in enumerate([Ysize, Usize, Vsize]):
            ctypes.memmove(vs_frame.get_write_ptr(i), pipe.stdout.read(size),  size)
        pipe.stdout.flush()
    except Exception as e:
        raise ValueError(repr(e))    
    return vs_frame

try:
    clip = core.std.ModifyFrame(clip, clip, load_frame)
except ValueError as e:
    pipe.terminate()
    print(e)

clip.set_output()

(used yuv420p16 in the example)