Struct TranscriptParser

pub struct TranscriptParser { /* private fields */ }

TranscriptParser

Parses YouTube transcript XML data into structured transcript snippets.

This parser handles YouTube’s XML format for transcripts and can:

• Extract text content, timing information, and duration
• Optionally preserve specified HTML formatting tags
• Remove unwanted HTML tags

Usage Example

use yt_transcript_rs::transcript_parser::TranscriptParser;

// Create a parser that strips all formatting
let parser = TranscriptParser::new(false);

// Or create a parser that preserves certain formatting tags (bold, italic, etc.)
let formatting_parser = TranscriptParser::new(true);

// Parse XML transcript data
let xml = r#"
    <transcript>
        <text start="0.0" dur="1.0">This is a transcript</text>
        <text start="1.0" dur="1.5">With multiple entries</text>
    </transcript>
"#;

let snippets = parser.parse(xml).unwrap();

Parser for YouTube transcript XML data

Implementations

impl TranscriptParser

pub fn new(preserve_formatting: bool) -> Self

Creates a new transcript parser.

Parameters

• preserve_formatting - If true, certain HTML formatting tags (like bold, italic) will be kept in the transcript. If false, all HTML tags will be removed.

Returns

A new TranscriptParser instance configured according to the formatting preference.

Example

// Create a parser that removes all HTML tags
let plain_parser = TranscriptParser::new(false);

// Create a parser that preserves formatting tags
let formatted_parser = TranscriptParser::new(true);

pub fn parse( &self, raw_data: &str, ) -> Result<Vec<FetchedTranscriptSnippet>, Error>

Parses YouTube transcript XML into a collection of transcript snippets.

This method takes raw XML data from YouTube transcripts and processes it into structured FetchedTranscriptSnippet objects that contain:

• Text content (with optional formatting)
• Start time in seconds
• Duration in seconds

Parameters

• raw_data - The raw XML string containing transcript data from YouTube

Returns

• Result<Vec<FetchedTranscriptSnippet>, anyhow::Error> - A vector of transcript snippets on success, or an error if parsing fails

Errors

This function will return an error if:

• The XML data is malformed and cannot be parsed
• Required attributes are missing or invalid

Example

let parser = TranscriptParser::new(false);
let snippets = parser.parse(xml).unwrap();

for snippet in snippets {
    println!("[{:.1}-{:.1}s] {}",
        snippet.start,
        snippet.start + snippet.duration,
        snippet.text);
}

pub fn process_with_formatting(&self, text: &str) -> String

Processes text to preserve only specific allowed HTML formatting tags.

This method:

1. Identifies all HTML tags in the text
2. Keeps only the tags listed in FORMATTING_TAGS
3. Removes all other HTML tags

Parameters

• text - The text containing HTML tags to process

Returns

A string with only the allowed formatting tags preserved and all others removed.

Example (internal usage)

// Only <b> and <i> tags would be preserved, <span> would be removed
let result = parser.process_with_formatting(input);
// Result would be "<b>Bold</b> and span and <i>italic</i>"

Trait Implementations

impl Debug for TranscriptParser

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.