scikit video with custom gpu ffmpeg

gistfile1.txt

import os
ffmpeg_install_dir = '/nvme_drive/orm/ffmpeg_install2/'
os.environ['LD_LIBRARY_PATH'] = f'{ffmpeg_install_dir}/lib/'
import skvideo
skvideo.setFFmpegPath(f'{ffmpeg_install_dir}/bin/')
import skvideo.io

## minimal options
device=0
file = /big_fast_drive/orm/birds/birds_panama.mp4',
vr = skvideo.io.vreader(file,
                         inputdict={'-hwaccel':'nvdec',
                                    '-hwaccel_device':f'{device}',
                                    '-c:v':'h264_cuvid'})

for frm in tqdm(vr): # should be using gpu
    pass
    
## some other filters (but note currently broken)
device=0
target_height=1080
target_width=int(np.round((target_height/1080)*1920))
vr1 = skvideo.io.vreader('/big_fast_drive/orm/birds/birds_panama.mp4', #height=target_height, width=target_width,
                         inputdict={'-hwaccel':'nvdec',
                                    '-hwaccel_device':f'{device}',
                                     '-c:v':'h264_cuvid',
                                   },
                        outputdict={
                                    '-vf':f'hwupload_cuda,scale_npp=-1:{target_height}:interp_algo=cubic,hwdownload,format=nv12'}, verbosity=1)

for frm in tqdm(vr1): # should show more gpu usage than previous option 
    pass