abhiTronix
commented
2 years ago @seascheng Thanks for reporting this issue, I'll try address your issue by going over each problem you encountered.
Seems '-' is a wrong character in "–hwaccel", it should be "-", like "-vsync". They look very similar
@seascheng Yes, indeed it was a unicode error. I'll fix it.
Con't use ffparams ("–hwaccel", "cuvid"). The ffmpeg command used by decoder at last is : 12:21:40 :: FFdecoder :: DEBUG :: Executing FFmpeg command: `ffmpeg -vsync 0 -hwaccel cuvid -vcodec h264_cuvid -i /data/sport/demo/deffcode_test/Big_Buck_Bunny_1080_10s_1MB.mp4 -pix_fmt bgr24 -s 1920x1080 -framerate 60.0 -f rawvideo -
But this will have an error:
Impossible to convert between the formats supported by the filter 'Parsed_null_0' and the filter 'auto_scale_0' Error reinitializing filters! Failed to inject frame into filter network: Function not implemented I have checked commands:
ffmpeg -vsync 0 -vcodec hevc_cuvid -i /data/sport/auto_directed/ptz_camera/videos/guoxin_h265.mp4 -pix_fmt bgr24 -f rawvideo -
ffmpeg -vsync 0 -hwaccel_output_format cuda -hwaccel cuvid -vcodec hevc_cuvid -i /data/sport/auto_directed/ptz_camera/videos/guoxin_h265.mp4 -pix_fmt bgr24 -f rawvideo -
@seascheng You should not copy that example as it is, But rather you need to make changes according to your system's NVIDIA GPU. Therefore, to avoid using old CUVID decoder and directly use CUDA with NVDEC, and thereby let FFmpeg use best available encoder by default use following code instead. You can also leave frame format empty to use RGB24 instead of BGR24 with WriteGear API write() method's rgb_mode:
# import the necessary packages
from deffcode import FFdecoder
from vidgear.gears import WriteGear
import json
# define suitable FFmpeg parameter
ffparams = {
"-vcodec": None, # skip any decoder and let FFmpeg chose
"-ffprefixes": [
"-hwaccel",
"nvdec",
"-hwaccel_device",
"0",
"-hwaccel_output_format",
"cuda",
], # accelerator
}
# initialize and formulate the decoder with suitable source and params
decoder = FFdecoder("foo.mp4", verbose=True, **ffparams).formulate()
# retrieve framerate from source JSON Metadata and pass it as `-input_framerate`
# parameter for controlled framerate and define other parameters
output_params = {
"-input_framerate": json.loads(decoder.metadata)["source_video_framerate"],
"-vcodec": "h264_nvenc", # H.264 NVENC encoder
}
# Define writer with defined parameters and suitable
# output filename for e.g. `output_foo.mp4`
writer = WriteGear(output_filename="output_foo.mp4", **output_params)
# grab the BGR24 frame from the decoder
for frame in decoder.generateFrame():
# check if frame is None
if frame is None:
break
# {do something with the frame here}
# writing RGB24 frame to writer
writer.write(frame, rgb_mode=True)
# terminate the decoder
decoder.terminate()
# safely close writer
writer.close()So I removed -hwaccel cuvid to test this case.
WriteGear :: ERROR :: BrokenPipeError caught, Wrong values passed to FFmpeg Pipe, Kindly Refer Docs! , If "-resize" in output_params. I have checked this doc of WriteGear. There is no param named "-resize" both in FFmpeg Parameters and Special Internal Parameters.
So I removed -resize to test this case.
Yes, that parameter shouldn't be there, it was added just to resize frames directly inside GPU memory. Maybe it is not working, so it is best to remove that parameter.
seascheng
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Hi, Many thanks to you. This project helps me a lot.
I want use my gpu, so I tried the code in "Hardware-Accelerated Video Transcoding"
ENV:
At first. my ffmpeg already support GPU.
But after I copied those codes and run, some errors happened.
Con't use ffparams ("–hwaccel", "cuvid"). The ffmpeg command used by decoder at last is :
12:21:40 :: FFdecoder :: DEBUG :: Executing FFmpeg command: `ffmpeg -vsync 0 -hwaccel cuvid -vcodec h264_cuvid -i /data/sport/demo/deffcode_test/Big_Buck_Bunny_1080_10s_1MB.mp4 -pix_fmt bgr24 -s 1920x1080 -framerate 60.0 -f rawvideo -
But this will have an error:
I have checked commands:
ffmpeg -vsync 0 -hwaccel_output_format cuda -hwaccel cuvid -vcodec hevc_cuvid -i /data/sport/auto_directed/ptz_camera/videos/guoxin_h265.mp4 -pix_fmt bgr24 -f rawvideo -