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NVIDIA DALI - Home NVIDIA DALI - Home

NVIDIA DALI

Git SHA: 6e98682
NVIDIA DALI - Home NVIDIA DALI - Home

NVIDIA DALI

Table of Contents

  • Home

Getting Started

  • Installation
  • Platform Support
  • Getting Started
    • Pipeline Mode
    • Dynamic Mode
  • Reporting vulnerabilities

Pipeline API Documentation

  • Pipeline API Overview
  • Pipeline and processing graph
  • Types in DALI Pipeline API
  • Mathematical Expressions
  • Indexing and Slicing
  • Operation Reference
    • nvidia.dali.fn
      • nvidia.dali.fn.audio_resample
      • nvidia.dali.fn.batch_permutation
      • nvidia.dali.fn.bb_flip
      • nvidia.dali.fn.bbox_paste
      • nvidia.dali.fn.bbox_rotate
      • nvidia.dali.fn.box_encoder
      • nvidia.dali.fn.brightness
      • nvidia.dali.fn.brightness_contrast
      • nvidia.dali.fn.cast
      • nvidia.dali.fn.cast_like
      • nvidia.dali.fn.cat
      • nvidia.dali.fn.clahe
      • nvidia.dali.fn.color_space_conversion
      • nvidia.dali.fn.color_twist
      • nvidia.dali.fn.contrast
      • nvidia.dali.fn.coord_flip
      • nvidia.dali.fn.coord_transform
      • nvidia.dali.fn.copy
      • nvidia.dali.fn.crop
      • nvidia.dali.fn.crop_mirror_normalize
      • nvidia.dali.fn.debayer
      • nvidia.dali.fn.dl_tensor_python_function
      • nvidia.dali.fn.dump_image
      • nvidia.dali.fn.element_extract
      • nvidia.dali.fn.equalize
      • nvidia.dali.fn.erase
      • nvidia.dali.fn.expand_dims
      • nvidia.dali.fn.external_source
      • nvidia.dali.fn.filter
      • nvidia.dali.fn.flip
      • nvidia.dali.fn.full
      • nvidia.dali.fn.full_like
      • nvidia.dali.fn.gaussian_blur
      • nvidia.dali.fn.get_property
      • nvidia.dali.fn.grid_mask
      • nvidia.dali.fn.hsv
      • nvidia.dali.fn.hue
      • nvidia.dali.fn.jitter
      • nvidia.dali.fn.jpeg_compression_distortion
      • nvidia.dali.fn.laplacian
      • nvidia.dali.fn.lookup_table
      • nvidia.dali.fn.mel_filter_bank
      • nvidia.dali.fn.mfcc
      • nvidia.dali.fn.multi_paste
      • nvidia.dali.fn.nonsilent_region
      • nvidia.dali.fn.normalize
      • nvidia.dali.fn.numba_function
      • nvidia.dali.fn.one_hot
      • nvidia.dali.fn.ones
      • nvidia.dali.fn.ones_like
      • nvidia.dali.fn.optical_flow
      • nvidia.dali.fn.pad
      • nvidia.dali.fn.paste
      • nvidia.dali.fn.peek_image_shape
      • nvidia.dali.fn.per_frame
      • nvidia.dali.fn.permute_batch
      • nvidia.dali.fn.power_spectrum
      • nvidia.dali.fn.preemphasis_filter
      • nvidia.dali.fn.python_function
      • nvidia.dali.fn.random_bbox_crop
      • nvidia.dali.fn.random_crop_generator
      • nvidia.dali.fn.random_resized_crop
      • nvidia.dali.fn.reinterpret
      • nvidia.dali.fn.reshape
      • nvidia.dali.fn.resize
      • nvidia.dali.fn.resize_crop_mirror
      • nvidia.dali.fn.roi_random_crop
      • nvidia.dali.fn.rotate
      • nvidia.dali.fn.saturation
      • nvidia.dali.fn.sequence_rearrange
      • nvidia.dali.fn.slice
      • nvidia.dali.fn.spectrogram
      • nvidia.dali.fn.sphere
      • nvidia.dali.fn.squeeze
      • nvidia.dali.fn.stack
      • nvidia.dali.fn.tensor_resize
      • nvidia.dali.fn.to_decibels
      • nvidia.dali.fn.torch_python_function
      • nvidia.dali.fn.transpose
      • nvidia.dali.fn.warp_affine
      • nvidia.dali.fn.water
      • nvidia.dali.fn.zeros
      • nvidia.dali.fn.zeros_like
    • nvidia.dali.fn.decoders
      • nvidia.dali.fn.decoders.audio
      • nvidia.dali.fn.decoders.image
      • nvidia.dali.fn.decoders.image_crop
      • nvidia.dali.fn.decoders.image_random_crop
      • nvidia.dali.fn.decoders.image_slice
      • nvidia.dali.fn.decoders.inflate
      • nvidia.dali.fn.decoders.numpy
      • nvidia.dali.fn.decoders.video
    • nvidia.dali.fn.experimental
      • nvidia.dali.fn.experimental.dilate
      • nvidia.dali.fn.experimental.erode
      • nvidia.dali.fn.experimental.median_blur
      • nvidia.dali.fn.experimental.peek_image_shape
      • nvidia.dali.fn.experimental.remap
      • nvidia.dali.fn.experimental.resize
      • nvidia.dali.fn.experimental.warp_perspective
    • nvidia.dali.fn.experimental.decoders
      • nvidia.dali.fn.experimental.decoders.image
      • nvidia.dali.fn.experimental.decoders.image_crop
      • nvidia.dali.fn.experimental.decoders.image_random_crop
      • nvidia.dali.fn.experimental.decoders.image_slice
    • nvidia.dali.fn.experimental.inputs
      • nvidia.dali.fn.experimental.inputs.video
    • nvidia.dali.fn.experimental.readers
      • nvidia.dali.fn.experimental.readers.fits
      • nvidia.dali.fn.experimental.readers.video
    • nvidia.dali.fn.io.file
      • nvidia.dali.fn.io.file.read
    • nvidia.dali.fn.noise
      • nvidia.dali.fn.noise.gaussian
      • nvidia.dali.fn.noise.salt_and_pepper
      • nvidia.dali.fn.noise.shot
    • nvidia.dali.fn.plugin.video
      • nvidia.dali.fn.plugin.video.decoder
    • nvidia.dali.fn.random
      • nvidia.dali.fn.random.beta
      • nvidia.dali.fn.random.choice
      • nvidia.dali.fn.random.coin_flip
      • nvidia.dali.fn.random.normal
      • nvidia.dali.fn.random.uniform
    • nvidia.dali.fn.readers
      • nvidia.dali.fn.readers.caffe
      • nvidia.dali.fn.readers.caffe2
      • nvidia.dali.fn.readers.coco
      • nvidia.dali.fn.readers.file
      • nvidia.dali.fn.readers.mxnet
      • nvidia.dali.fn.readers.nemo_asr
      • nvidia.dali.fn.readers.numpy
      • nvidia.dali.fn.readers.tfrecord
      • nvidia.dali.fn.readers.video
      • nvidia.dali.fn.readers.video_resize
      • nvidia.dali.fn.readers.webdataset
    • nvidia.dali.fn.reductions
      • nvidia.dali.fn.reductions.max
      • nvidia.dali.fn.reductions.mean
      • nvidia.dali.fn.reductions.mean_square
      • nvidia.dali.fn.reductions.min
      • nvidia.dali.fn.reductions.rms
      • nvidia.dali.fn.reductions.std_dev
      • nvidia.dali.fn.reductions.sum
      • nvidia.dali.fn.reductions.variance
    • nvidia.dali.fn.segmentation
      • nvidia.dali.fn.segmentation.random_mask_pixel
      • nvidia.dali.fn.segmentation.random_object_bbox
      • nvidia.dali.fn.segmentation.select_masks
    • nvidia.dali.fn.transforms
      • nvidia.dali.fn.transforms.combine
      • nvidia.dali.fn.transforms.crop
      • nvidia.dali.fn.transforms.rotation
      • nvidia.dali.fn.transforms.scale
      • nvidia.dali.fn.transforms.shear
      • nvidia.dali.fn.transforms.translation
    • nvidia.dali.plugin.jax.fn
      • nvidia.dali.plugin.jax.fn.jax_function
    • nvidia.dali.plugin.numba.fn.experimental
      • nvidia.dali.plugin.numba.fn.experimental.numba_function
    • nvidia.dali.plugin.pytorch.fn
      • nvidia.dali.plugin.pytorch.fn.torch_python_function
  • Automatic Augmentations
    • AutoAugment
    • RandAugment
    • TrivialAugment
    • Augmentations reference
  • Operator Objects (Legacy)
  • DL Framework Plugins
    • PyTorch
      • PyTorch Plugin API reference
      • PyTorch DALI Proxy
      • Pytorch Framework
        • Using DALI in PyTorch
        • ExternalSource operator
        • Using PyTorch DALI plugin: using various readers
        • Using DALI in PyTorch Lightning
      • Loader Evaluator Tool
        • Loader Evaluator Tool
    • TensorFlow
      • TensorFlow Plugin API reference
      • Tensorflow Framework
        • Using Tensorflow DALI plugin: DALI and tf.data
        • Using Tensorflow DALI plugin: DALI tf.data.Dataset with multiple GPUs
        • Inputs to DALI Dataset with External Source
        • Using Tensorflow DALI plugin with sparse tensors
        • Using Tensorflow DALI plugin: simple example
        • Using Tensorflow DALI plugin: using various readers
    • PaddlePaddle
      • PaddlePaddle Plugin API reference
      • PaddlePaddle Framework
        • Using DALI in PaddlePaddle
        • ExternalSource operator
        • Using Paddle DALI plugin: using various readers
    • JAX
      • JAX Plugin API reference
      • JAX Framework
        • Getting started with JAX and DALI
        • Training a neural network with DALI and JAX
        • Training with multiple GPUs
        • Training neural network with DALI and Flax
        • Training neural network with DALI and Paxml
        • Getting started with T5X and DALI
      • Running JAX in DALI pipeline

Dynamic API Documentation

  • Dynamic API Overview
  • API Reference
  • Multithreading
  • Data Readers Reference
    • nvidia.dali.experimental.dynamic.experimental.readers
      • nvidia.dali.experimental.dynamic.experimental.readers.Fits
      • nvidia.dali.experimental.dynamic.experimental.readers.Video
    • nvidia.dali.experimental.dynamic.readers
      • nvidia.dali.experimental.dynamic.readers.MXNet
      • nvidia.dali.experimental.dynamic.readers.VideoResize
      • nvidia.dali.experimental.dynamic.readers.Caffe2
      • nvidia.dali.experimental.dynamic.readers.Caffe
      • nvidia.dali.experimental.dynamic.readers.File
      • nvidia.dali.experimental.dynamic.readers.COCO
      • nvidia.dali.experimental.dynamic.readers.Webdataset
      • nvidia.dali.experimental.dynamic.readers.TFRecord
      • nvidia.dali.experimental.dynamic.readers.Video
      • nvidia.dali.experimental.dynamic.readers.NemoAsr
      • nvidia.dali.experimental.dynamic.readers.Numpy
  • Operation Reference
    • nvidia.dali.experimental.dynamic
      • nvidia.dali.experimental.dynamic.audio_resample
      • nvidia.dali.experimental.dynamic.batch_permutation
      • nvidia.dali.experimental.dynamic.bb_flip
      • nvidia.dali.experimental.dynamic.bbox_paste
      • nvidia.dali.experimental.dynamic.bbox_rotate
      • nvidia.dali.experimental.dynamic.box_encoder
      • nvidia.dali.experimental.dynamic.brightness
      • nvidia.dali.experimental.dynamic.brightness_contrast
      • nvidia.dali.experimental.dynamic.cast
      • nvidia.dali.experimental.dynamic.cast_like
      • nvidia.dali.experimental.dynamic.cat
      • nvidia.dali.experimental.dynamic.clahe
      • nvidia.dali.experimental.dynamic.color_space_conversion
      • nvidia.dali.experimental.dynamic.color_twist
      • nvidia.dali.experimental.dynamic.contrast
      • nvidia.dali.experimental.dynamic.coord_flip
      • nvidia.dali.experimental.dynamic.coord_transform
      • nvidia.dali.experimental.dynamic.copy
      • nvidia.dali.experimental.dynamic.crop
      • nvidia.dali.experimental.dynamic.crop_mirror_normalize
      • nvidia.dali.experimental.dynamic.debayer
      • nvidia.dali.experimental.dynamic.dump_image
      • nvidia.dali.experimental.dynamic.element_extract
      • nvidia.dali.experimental.dynamic.equalize
      • nvidia.dali.experimental.dynamic.erase
      • nvidia.dali.experimental.dynamic.expand_dims
      • nvidia.dali.experimental.dynamic.filter
      • nvidia.dali.experimental.dynamic.flip
      • nvidia.dali.experimental.dynamic.full
      • nvidia.dali.experimental.dynamic.full_like
      • nvidia.dali.experimental.dynamic.gaussian_blur
      • nvidia.dali.experimental.dynamic.get_property
      • nvidia.dali.experimental.dynamic.grid_mask
      • nvidia.dali.experimental.dynamic.hsv
      • nvidia.dali.experimental.dynamic.hue
      • nvidia.dali.experimental.dynamic.jitter
      • nvidia.dali.experimental.dynamic.jpeg_compression_distortion
      • nvidia.dali.experimental.dynamic.laplacian
      • nvidia.dali.experimental.dynamic.lookup_table
      • nvidia.dali.experimental.dynamic.mel_filter_bank
      • nvidia.dali.experimental.dynamic.mfcc
      • nvidia.dali.experimental.dynamic.multi_paste
      • nvidia.dali.experimental.dynamic.nonsilent_region
      • nvidia.dali.experimental.dynamic.normalize
      • nvidia.dali.experimental.dynamic.one_hot
      • nvidia.dali.experimental.dynamic.ones
      • nvidia.dali.experimental.dynamic.ones_like
      • nvidia.dali.experimental.dynamic.optical_flow
      • nvidia.dali.experimental.dynamic.pad
      • nvidia.dali.experimental.dynamic.paste
      • nvidia.dali.experimental.dynamic.peek_image_shape
      • nvidia.dali.experimental.dynamic.per_frame
      • nvidia.dali.experimental.dynamic.permute_batch
      • nvidia.dali.experimental.dynamic.power_spectrum
      • nvidia.dali.experimental.dynamic.preemphasis_filter
      • nvidia.dali.experimental.dynamic.random_bbox_crop
      • nvidia.dali.experimental.dynamic.random_crop_generator
      • nvidia.dali.experimental.dynamic.random_resized_crop
      • nvidia.dali.experimental.dynamic.reinterpret
      • nvidia.dali.experimental.dynamic.reshape
      • nvidia.dali.experimental.dynamic.resize
      • nvidia.dali.experimental.dynamic.resize_crop_mirror
      • nvidia.dali.experimental.dynamic.roi_random_crop
      • nvidia.dali.experimental.dynamic.rotate
      • nvidia.dali.experimental.dynamic.saturation
      • nvidia.dali.experimental.dynamic.sequence_rearrange
      • nvidia.dali.experimental.dynamic.slice
      • nvidia.dali.experimental.dynamic.spectrogram
      • nvidia.dali.experimental.dynamic.sphere
      • nvidia.dali.experimental.dynamic.squeeze
      • nvidia.dali.experimental.dynamic.stack
      • nvidia.dali.experimental.dynamic.tensor_resize
      • nvidia.dali.experimental.dynamic.to_decibels
      • nvidia.dali.experimental.dynamic.transpose
      • nvidia.dali.experimental.dynamic.warp_affine
      • nvidia.dali.experimental.dynamic.water
      • nvidia.dali.experimental.dynamic.zeros
      • nvidia.dali.experimental.dynamic.zeros_like
    • nvidia.dali.experimental.dynamic.decoders
      • nvidia.dali.experimental.dynamic.decoders.audio
      • nvidia.dali.experimental.dynamic.decoders.image
      • nvidia.dali.experimental.dynamic.decoders.image_crop
      • nvidia.dali.experimental.dynamic.decoders.image_random_crop
      • nvidia.dali.experimental.dynamic.decoders.image_slice
      • nvidia.dali.experimental.dynamic.decoders.inflate
      • nvidia.dali.experimental.dynamic.decoders.numpy
      • nvidia.dali.experimental.dynamic.decoders.video
    • nvidia.dali.experimental.dynamic.experimental
      • nvidia.dali.experimental.dynamic.experimental.dilate
      • nvidia.dali.experimental.dynamic.experimental.erode
      • nvidia.dali.experimental.dynamic.experimental.median_blur
      • nvidia.dali.experimental.dynamic.experimental.peek_image_shape
      • nvidia.dali.experimental.dynamic.experimental.remap
      • nvidia.dali.experimental.dynamic.experimental.resize
      • nvidia.dali.experimental.dynamic.experimental.warp_perspective
    • nvidia.dali.experimental.dynamic.experimental.decoders
      • nvidia.dali.experimental.dynamic.experimental.decoders.image
      • nvidia.dali.experimental.dynamic.experimental.decoders.image_crop
      • nvidia.dali.experimental.dynamic.experimental.decoders.image_random_crop
      • nvidia.dali.experimental.dynamic.experimental.decoders.image_slice
    • nvidia.dali.experimental.dynamic.io.file
      • nvidia.dali.experimental.dynamic.io.file.read
    • nvidia.dali.experimental.dynamic.noise
      • nvidia.dali.experimental.dynamic.noise.gaussian
      • nvidia.dali.experimental.dynamic.noise.salt_and_pepper
      • nvidia.dali.experimental.dynamic.noise.shot
    • nvidia.dali.experimental.dynamic.plugin.video
      • nvidia.dali.experimental.dynamic.plugin.video.decoder
    • nvidia.dali.experimental.dynamic.random
      • nvidia.dali.experimental.dynamic.random.beta
      • nvidia.dali.experimental.dynamic.random.choice
      • nvidia.dali.experimental.dynamic.random.coin_flip
      • nvidia.dali.experimental.dynamic.random.normal
      • nvidia.dali.experimental.dynamic.random.uniform
    • nvidia.dali.experimental.dynamic.reductions
      • nvidia.dali.experimental.dynamic.reductions.max
      • nvidia.dali.experimental.dynamic.reductions.mean
      • nvidia.dali.experimental.dynamic.reductions.mean_square
      • nvidia.dali.experimental.dynamic.reductions.min
      • nvidia.dali.experimental.dynamic.reductions.rms
      • nvidia.dali.experimental.dynamic.reductions.std_dev
      • nvidia.dali.experimental.dynamic.reductions.sum
      • nvidia.dali.experimental.dynamic.reductions.variance
    • nvidia.dali.experimental.dynamic.segmentation
      • nvidia.dali.experimental.dynamic.segmentation.random_mask_pixel
      • nvidia.dali.experimental.dynamic.segmentation.random_object_bbox
      • nvidia.dali.experimental.dynamic.segmentation.select_masks
    • nvidia.dali.experimental.dynamic.transforms
      • nvidia.dali.experimental.dynamic.transforms.combine
      • nvidia.dali.experimental.dynamic.transforms.crop
      • nvidia.dali.experimental.dynamic.transforms.rotation
      • nvidia.dali.experimental.dynamic.transforms.scale
      • nvidia.dali.experimental.dynamic.transforms.shear
      • nvidia.dali.experimental.dynamic.transforms.translation
  • DL Frameworks
    • PyTorch
      • PyTorch Usage Guide
      • TorchData Integration Reference
      • Training a neural network with DALI and TorchData

Examples and Tutorials

  • Data Loading
    • External Source Operator - basic usage
    • Parallel External Source
    • Parallel External Source - Fork
    • LMDB Reader
      • Pipeline Mode
      • Dynamic Mode
    • MXNet RecordIO Reader
      • Pipeline Mode
      • Dynamic Mode
    • TFRecord Reader
      • Pipeline Mode
      • Dynamic Mode
    • Webdataset Reader
      • Pipeline Mode
      • Dynamic Mode
    • COCO Reader
      • Pipeline Mode
      • Dynamic Mode
    • NumPy Reader
      • Pipeline Mode
      • Dynamic Mode
  • Operations
    • General Purpose
      • DALI Expressions and Arithmetic Operations
        • DALI Expressions and Arithmetic Operators
        • DALI Binary Arithmetic Operators - Type Promotions
        • Custom Augmentations with Arithmetic Operations
        • Conditional-Like Execution and Masking
      • Reduction Operators
      • Tensor Joining
      • Reinterpreting Tensors
      • Normalize Operator
      • Geometric Transforms
      • Erase Operator
    • Image Processing
      • Augmentation Gallery
        • Pipeline Mode
        • Dynamic Mode
      • Brightness and Contrast
        • Pipeline Mode
        • Dynamic Mode
      • CLAHE
        • Pipeline Mode
        • Dynamic Mode
      • Color Space Conversion
        • Pipeline Mode
        • Dynamic Mode
      • Image Decoder
        • Pipeline Mode
        • Dynamic Mode
      • HSV
        • Pipeline Mode
        • Dynamic Mode
      • Interpolation methods
      • Resize Operator
        • Pipeline Mode
        • Dynamic Mode
      • Warp Affine
        • Pipeline Mode
        • Dynamic Mode
      • 3D Transforms
    • Audio Processing
      • Audio Decoder
        • Pipeline Mode
        • Dynamic Mode
      • Audio Spectrogram
        • Pipeline Mode
        • Dynamic Mode
    • Video Processing
      • Simple Video Pipeline Reading From Multiple Files
        • Pipeline Mode
        • Dynamic Mode
      • Video Pipeline Reading Labelled Videos from a Directory
        • Pipeline Mode
        • Dynamic Mode
      • Video Pipeline Demonstrating Applying Labels Based on Timestamps or Frame Numbers
        • Pipeline Mode
        • Dynamic Mode
      • Processing video with image processing operators
        • Pipeline Mode
        • Dynamic Mode
      • Reading Video Frames Stored as Images
      • Optical Flow
        • Pipeline Mode
        • Dynamic Mode
  • Use Cases
    • Video Super-Resolution
    • ImageNet Training in PyTorch
    • Single Shot MultiBox Detector Training in PyTorch
    • EfficientNet for PyTorch with DALI and AutoAugment
    • ResNet-N with TensorFlow and DALI
    • You Only Look Once v4 with TensorFlow and DALI
    • EfficientDet with TensorFlow and DALI
    • PaddlePaddle Use-Cases
      • ResNet Training in PaddlePaddle
      • Temporal Shift Module Inference in PaddlePaddle
    • COCO Reader with Augmentations
    • WebDataset integration using External Source
  • Other
    • Multiple GPU Support
    • Conditional execution in DALI
    • Custom Operations
      • Create a Custom Operator in C++
      • Python Operators
      • Processing GPU Data with Python Operators
      • Numba Function - Running a Compiled C Callback Function
      • Running custom JAX augmentations in DALI
      • Running JAX augmentations on multiple GPUs
    • Serialization
    • Operator Objects (Legacy)

Advanced

  • Performance Tuning
  • Sharding
  • Pipeline Run Methods
  • Checkpointing
  • Experimental
  • Compiling DALI from Source
  • DALI Environment Variables

Frequently Asked Questions

  • Q&A

Reference

  • Release Notes
  • GitHub
  • Roadmap
  • DL Frameworks
  • PyTorch

PyTorch#

  • PyTorch Usage Guide
    • Basic usage
    • Next steps
  • TorchData Integration Reference
    • Reader
    • DictMapper
    • ToTorch
    • Usage Pattern
  • Training a neural network with DALI and TorchData
    • Image Processing
    • Data Loader Pipeline
    • Model Definition
    • Training Loop
    • Validation

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DL Frameworks

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PyTorch Usage Guide
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