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#
# Copyright 2019 NVIDIA Corporation
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Starting from Python 3.8 DLL search policy has changed.
# We need to add path to CUDA DLLs explicitly.
import numpy as np
from enum import Enum
import PyNvCodec as nvc
import sys
import os
import logging
import argparse
import pathlib
logger = logging.getLogger(__file__)
if os.name == "nt":
# Add CUDA_PATH env variable
cuda_path = os.environ["CUDA_PATH"]
if cuda_path:
os.add_dll_directory(cuda_path)
else:
logger.error("CUDA_PATH environment variable is not set.")
logger.error("Can't set CUDA DLLs search path.")
exit(1)
# Add PATH as well for minor CUDA releases
sys_path = os.environ["PATH"]
if sys_path:
paths = sys_path.split(";")
for path in paths:
if os.path.isdir(path):
os.add_dll_directory(path)
else:
logger.error("PATH environment variable is not set.")
exit(1)
total_num_frames = 444
def encode(gpuID, decFilePath, encFilePath, width, height, codec, format):
decFile = open(decFilePath, "rb")
encFile = open(encFilePath, "wb")
res = str(width) + "x" + str(height)
pixel_format = nvc.PixelFormat.NV12
profile = "high"
if format == 'yuv444':
pixel_format = nvc.PixelFormat.YUV444
profile = "high_444"
elif format == 'yuv444_10bit':
pixel_format = nvc.PixelFormat.YUV444_10bit
profile = "high_444_10bit"
elif format == 'yuv420_10bit':
pixel_format = nvc.PixelFormat.YUV420_10bit
profile = "high_420_10bit"
nvEnc = nvc.PyNvEncoder(
{
"preset": "P5",
"tuning_info": "high_quality",
"codec": codec,
"profile": profile,
"s": res,
"bitrate": "10M",
},
gpuID,
pixel_format
)
frameSize = nvEnc.GetFrameSizeInBytes()
encFrame = np.ndarray(shape=(0), dtype=np.uint8)
# Number of frames we've sent to encoder
framesSent = 0
# Number of frames we've received from encoder
framesReceived = 0
# Number of frames we've got from encoder during flush.
# This number is included in number of received frames.
# We use separate counter to check if encoder receives packets one by one
# during flush.
framesFlushed = 0
while framesSent < total_num_frames:
rawFrame = np.fromfile(decFile, np.uint8, count=frameSize)
if not (rawFrame.size):
print("No more input frames")
break
success = nvEnc.EncodeSingleFrame(rawFrame, encFrame, sync=False)
framesSent += 1
if success:
encByteArray = bytearray(encFrame)
encFile.write(encByteArray)
framesReceived += 1
# Encoder is asynchronous, so we need to flush it
while True:
success = nvEnc.FlushSinglePacket(encFrame)
if (success) and (framesReceived < total_num_frames):
encByteArray = bytearray(encFrame)
encFile.write(encByteArray)
framesReceived += 1
framesFlushed += 1
else:
break
print(
framesReceived,
"/",
total_num_frames,
" frames encoded and written to output file.",
)
print(framesFlushed, " frame(s) received during encoder flush.")
if __name__ == "__main__":
parser = argparse.ArgumentParser(
"This sample encodes first " + str(total_num_frames) + "frames of input raw NV12 file to H.264 video on given "
"GPU." + "\n "
+ "It reconfigures encoder on-the fly to illustrate bitrate change,"
+ " IDR frame force and encoder reset.\n"
)
parser.add_argument(
"gpu_id",
type=int,
help="GPU id, check nvidia-smi",
)
parser.add_argument(
"raw_file_path",
type=pathlib.Path,
help="raw video file (read from)",
)
parser.add_argument(
"encoded_file_path",
type=pathlib.Path,
help="encoded video file (write to)",
)
parser.add_argument(
"width",
type=int,
help="width",
)
parser.add_argument(
"height",
type=int,
help="height",
)
parser.add_argument(
"codec",
type=str,
nargs='?',
default="h264",
help="supported codec",
)
parser.add_argument(
"surfaceformat",
type=str,
nargs='?',
default="nv12",
help="supported format",
)
args = parser.parse_args()
gpuID = args.gpu_id
decFilePath = args.raw_file_path
encFilePath = args.encoded_file_path
width = args.width
height = args.height
codec = args.codec
surfaceformat = args.surfaceformat
encode(gpuID, decFilePath, encFilePath, width, height, codec, surfaceformat)
exit(0)