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Fixes #23
## Type of change
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| # Holoscan utility scripts | ||
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| We have few examples on how to use `convert_video_to_gxf_entities.py` [here](../../data/polyp-dataset/README.md). | ||
| For further details see references. | ||
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| ## References | ||
| https://github.com/nvidia-holoscan/holoscan-sdk/tree/main/scripts#convert_video_to_gxf_entitiespy | ||
| https://docs.nvidia.com/holoscan/sdk-user-guide/gxf/gxf_by_example.html | ||
| https://docs.nvidia.com/clara-holoscan/archive/clara-holoscan-0.3.0/gxf/index.html | ||
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nvidia-clara-agx/holoscan-sdk-scripts/convert_video_to_gxf_entities.py
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| # SPDX-FileCopyrightText: Copyright (c) 2023 NVIDIA CORPORATION & AFFILIATES. All rights reserved. | ||
| # SPDX-License-Identifier: Apache-2.0 | ||
| # | ||
| # 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. | ||
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| import argparse | ||
| import sys | ||
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| import numpy as np | ||
| from gxf_entity_codec import EntityWriter | ||
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| def iter_input_frames(f, width, height, channels): | ||
| frame_byte_count = width * height * channels | ||
| while True: | ||
| frame_bytes = f.read(frame_byte_count) | ||
| if len(frame_bytes) != frame_byte_count: | ||
| break | ||
| array = np.frombuffer(frame_bytes, np.uint8) | ||
| frame = array.reshape(height, width, channels) | ||
| yield frame | ||
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| def main(): | ||
| parser = argparse.ArgumentParser( | ||
| description=( | ||
| "Command line utility for writing raw video frames in GXF Tensors for " | ||
| "stream playback." | ||
| ) | ||
| ) | ||
| parser.add_argument("--width", required=True, type=int, help="Input width in pixels") | ||
| parser.add_argument("--height", required=True, type=int, help="Input height in pixels") | ||
| parser.add_argument("--channels", default=3, type=int, help="Channel count") | ||
| parser.add_argument("--framerate", default=30, type=int, help="Output frame rate") | ||
| parser.add_argument("--basename", default="tensor", help="Basename for gxf entities to write") | ||
| parser.add_argument("--directory", default="./", help="Directory for gxf entities to write") | ||
| args = parser.parse_args() | ||
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| with EntityWriter( | ||
| directory=args.directory, basename=args.basename, framerate=args.framerate | ||
| ) as recorder: | ||
| for frame in iter_input_frames( | ||
| sys.stdin.buffer, | ||
| width=args.width, | ||
| height=args.height, | ||
| channels=args.channels, | ||
| ): | ||
| recorder.add(frame) | ||
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| if __name__ == "__main__": | ||
| main() |
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