(
inputBuffer: Buffer,
mimeType: string,
options: AudioExtractionOptions = {}
)
| 67 | * Extract audio from video or convert audio format using FFmpeg |
| 68 | */ |
| 69 | export async function extractAudioFromVideo( |
| 70 | inputBuffer: Buffer, |
| 71 | mimeType: string, |
| 72 | options: AudioExtractionOptions = {} |
| 73 | ): Promise<AudioExtractionResult> { |
| 74 | // Initialize FFmpeg on first use |
| 75 | ensureFfmpeg() |
| 76 | const isVideo = mimeType.startsWith('video/') |
| 77 | const isAudio = mimeType.startsWith('audio/') |
| 78 | |
| 79 | // If it's already audio and no conversion needed, get metadata and return |
| 80 | if (isAudio && !options.outputFormat) { |
| 81 | try { |
| 82 | const metadata = await getAudioMetadata(inputBuffer, mimeType) |
| 83 | return { |
| 84 | buffer: inputBuffer, |
| 85 | format: mimeType.split('/')[1] || 'unknown', |
| 86 | duration: metadata.duration || 0, |
| 87 | size: inputBuffer.length, |
| 88 | } |
| 89 | } catch (error) { |
| 90 | // If metadata extraction fails, still return the buffer |
| 91 | return { |
| 92 | buffer: inputBuffer, |
| 93 | format: mimeType.split('/')[1] || 'unknown', |
| 94 | duration: 0, |
| 95 | size: inputBuffer.length, |
| 96 | } |
| 97 | } |
| 98 | } |
| 99 | |
| 100 | // For video or audio conversion, use ffmpeg |
| 101 | if (isVideo || options.outputFormat) { |
| 102 | return await convertAudioWithFFmpeg(inputBuffer, mimeType, options) |
| 103 | } |
| 104 | |
| 105 | // Fallback |
| 106 | return { |
| 107 | buffer: inputBuffer, |
| 108 | format: options.outputFormat || mimeType.split('/')[1] || 'unknown', |
| 109 | duration: 0, |
| 110 | size: inputBuffer.length, |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /** |
| 115 | * Convert audio/video using FFmpeg |
no test coverage detected