---
title: "ClikaRT::processor::processor_defaults"
sidebar_label: "processor_defaults"
description: "Namespace ClikaRT::processor::processor_defaults"
---

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Default knob values the `from_args` factories apply when an argument is left `{}` (the documented HuggingFace/PIL defaults). Named here so callers see them in the header, `arg.value_or(kImageDefault…)`, without reading the docs. The library `static_assert`s each against its internal default, so these and the internal defaults are one source of truth (a drift is a compile error).

## Variables

### kImageRescaleFactor {#kImageRescaleFactor}

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`double` **`kImageRescaleFactor`** `= 1.0 / 255.0`

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pixel scale (1/255)

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Declared in `ClikaRT/processor/processor.h`, line 45

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### kImageDoRescale {#kImageDoRescale}

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`bool` **`kImageDoRescale`** `= true`

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Declared in `ClikaRT/processor/processor.h`, line 46

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### kImageDoNormalize {#kImageDoNormalize}

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`bool` **`kImageDoNormalize`** `= true`

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Declared in `ClikaRT/processor/processor.h`, line 47

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### kImageDoConvertRgb {#kImageDoConvertRgb}

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`bool` **`kImageDoConvertRgb`** `= true`

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Declared in `ClikaRT/processor/processor.h`, line 48

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### kImageResampleBicubic {#kImageResampleBicubic}

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`int` **`kImageResampleBicubic`** `= 3`

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PIL bicubic (HF default).

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Declared in `ClikaRT/processor/processor.h`, line 49

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### kImageAntialias {#kImageAntialias}

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`bool` **`kImageAntialias`** `= true`

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antialiased resize (PIL behavior)

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Declared in `ClikaRT/processor/processor.h`, line 50

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### kAudioSamplingRate {#kAudioSamplingRate}

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`std::int64_t` **`kAudioSamplingRate`** `= 16000`

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16 kHz

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Declared in `ClikaRT/processor/processor.h`, line 51

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### kAudioFeatureSize {#kAudioFeatureSize}

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`std::int64_t` **`kAudioFeatureSize`** `= 80`

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mel bins

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Declared in `ClikaRT/processor/processor.h`, line 52

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### kAudioNFft {#kAudioNFft}

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`std::int64_t` **`kAudioNFft`** `= 400`

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Declared in `ClikaRT/processor/processor.h`, line 53

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### kAudioHopLength {#kAudioHopLength}

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`std::int64_t` **`kAudioHopLength`** `= 160`

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Declared in `ClikaRT/processor/processor.h`, line 54

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### kVideoNumFrames {#kVideoNumFrames}

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`std::int64_t` **`kVideoNumFrames`** `= 0`

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0 = keep all / use fps

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Declared in `ClikaRT/processor/processor.h`, line 55

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### kVideoFps {#kVideoFps}

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`double` **`kVideoFps`** `= 0.0`

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0 = use num\_frames

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Declared in `ClikaRT/processor/processor.h`, line 56

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## `ClikaRT/processor/processor.h` {#processor-h}

```cpp
#include <ClikaRT/processor/processor.h>
```

Generic, config-driven media preprocessors that read a model's preprocessor config ([ClikaRT](../../../index.md) has no native format of its own; the loader names the format it reads): an `ImageProcessor` (resize / crop / rescale / normalize), an `AudioProcessor` (raw waveform / log-mel / filterbank), a `VideoProcessor` (temporal sampling over the image pipeline), and a `Processor` bundle. Each turns file(s) / bytes / a `Tensor` into a preprocessed `Tensor`.

Placement: a processor binds a `StreamOrDevice` at load time (where its work runs by default); every `process` call takes an optional `StreamOrDevice` override (`{}` = use the bound one). A default-constructed binding is CPU.