ComfyUI Node: Save Audio (Opus)

Save Audio (Opus):

The SaveAudioOpus node is designed to facilitate the conversion and saving of audio data into the Opus format, a highly efficient audio codec known for its superior compression capabilities and quality retention. This node is particularly beneficial for users who need to store or share audio files in a format that balances quality and file size, making it ideal for streaming and online distribution. By leveraging the Opus codec, the node ensures that audio files are compressed without significant loss of quality, even at lower bitrates. The node's primary function is to take audio input, apply the necessary transformations, and save it in the specified directory with a user-defined filename prefix and quality setting. This process is streamlined to ensure ease of use, allowing you to focus on creative tasks without worrying about the technical intricacies of audio encoding.

Save Audio (Opus) Input Parameters:

audio

The audio parameter is the core input for the node, representing the audio data that you wish to convert and save. This parameter accepts audio data in a format that the node can process, ensuring that the audio is correctly encoded into the Opus format. The quality of the input audio can significantly impact the final output, so it is important to provide high-quality audio for the best results.

filename_prefix

The filename_prefix parameter allows you to specify a custom prefix for the saved audio file's name. This is useful for organizing and identifying files, especially when dealing with multiple outputs. The default value is "audio/ComfyUI", but you can customize it to suit your project needs. This prefix is appended to the filename, helping you maintain a consistent naming convention across your audio files.

quality

The quality parameter determines the bitrate of the output Opus file, directly affecting the audio quality and file size. Available options are "64k", "96k", "128k", "192k", and "320k", with "128k" as the default setting. Lower bitrates result in smaller file sizes but may compromise audio quality, while higher bitrates provide better quality at the expense of larger file sizes. Selecting the appropriate quality setting depends on your specific requirements for audio fidelity and storage constraints.

Save Audio (Opus) Output Parameters:

The SaveAudioOpus node does not have explicit output parameters in the traditional sense, as its primary function is to save the processed audio file to a specified location. The result of the node's operation is the creation of an Opus audio file in the designated output directory, with the filename and quality settings as specified by the input parameters. This output is crucial for tasks that require efficient audio storage and distribution.

Save Audio (Opus) Usage Tips:

• To achieve the best balance between audio quality and file size, experiment with different quality settings based on your project's needs. For streaming purposes, a lower bitrate like "96k" might suffice, while "192k" or "320k" could be more suitable for high-fidelity audio applications.
• Use a descriptive filename_prefix to easily identify and organize your audio files, especially when working on large projects with multiple outputs.

Save Audio (Opus) Common Errors and Solutions:

Invalid audio file: <audio>

• Explanation: This error occurs when the provided audio input is not recognized or cannot be processed by the node.
• Solution: Ensure that the audio file is in a supported format and that the file path is correct. Verify that the audio data is not corrupted and is accessible by the node.

Unsupported sample rate

• Explanation: The Opus format supports specific sample rates, and this error indicates that the input audio's sample rate is not compatible.
• Solution: The node automatically resamples the audio to a supported rate if necessary. If you encounter issues, manually resample the audio to a supported rate such as 48000 Hz before inputting it into the node.