read Frames from Video using FFMPEG gpu python - ffmpeg

Question

import os
import subprocess
class FFMPEGFrames:
def __init__(self, output):
self.output = output
def extract_frames(self, input, fps):
output = input.split('/')[-1].split('.')[0]
if not os.path.exists(self.output + output):
os.makedirs(self.output + output)
query = "ffmpeg -y -hwaccel cuvid -c:v h264_cuvid -resize 1024x70 -i " + input + " -vf scale_npp=format=yuv420p,hwdownload,format=yuv420p -vf fps=" + str(fps) + " -pix_fmt yuvj420p -color_range 2 -vframes 1 -y " + self.output + output + "/output%06d.jpg"
response = subprocess.Popen(query, shell=True, stdout=subprocess.PIPE).stdout.read()
s = str(response).encode('utf-8')
i received this error :
Impossible to convert between the formats supported by the filter 'Parsed_fps_0' and the filter 'auto_scaler_0'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:0
Conversion failed!

Answer 1

You likely missed an error message:
Only '-vf fps' read, ignoring remaining -vf options: Use ',' to separate filters
Combine both of your -vf into one. Also, consider replacing -pix_fmt yuvj420p with the format filter so all filtering can be within one filtergraph and you can choose exactly where that occurs within the filtergraph.