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feat: sync animated anki images to sentence audio

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This commit is contained in:
Kyle Yasuda
2026-03-18 19:21:12 -07:00
parent f4cce31d4a
commit ad1f66a842
18 changed files with 452 additions and 38 deletions
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48
src/media-generator.ts
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@@ -24,6 +24,33 @@ import { createLogger } from './logger';
const log = createLogger('media');
export function buildAnimatedImageVideoFilter(options: {
fps?: number;
maxWidth?: number;
maxHeight?: number;
leadingStillDuration?: number;
}): string {
const { fps = 10, maxWidth = 640, maxHeight, leadingStillDuration = 0 } = options;
const clampedFps = Math.max(1, Math.min(60, fps));
const vfParts: string[] = [];
if (leadingStillDuration > 0) {
vfParts.push(`tpad=start_duration=${leadingStillDuration}:start_mode=clone`);
}
vfParts.push(`fps=${clampedFps}`);
if (maxWidth && maxWidth > 0 && maxHeight && maxHeight > 0) {
vfParts.push(`scale=w=${maxWidth}:h=${maxHeight}:force_original_aspect_ratio=decrease`);
} else if (maxWidth && maxWidth > 0) {
vfParts.push(`scale=w=${maxWidth}:h=-2`);
} else if (maxHeight && maxHeight > 0) {
vfParts.push(`scale=w=-2:h=${maxHeight}`);
}
return vfParts.join(',');
}
export class MediaGenerator {
private tempDir: string;
private notifyIconDir: string;
@@ -289,25 +316,15 @@ export class MediaGenerator {
maxWidth?: number;
maxHeight?: number;
crf?: number;
leadingStillDuration?: number;
} = {},
): Promise<Buffer> {
const start = Math.max(0, startTime - padding);
const duration = endTime - startTime + 2 * padding;
const { fps = 10, maxWidth = 640, maxHeight, crf = 35 } = options;
const { fps = 10, maxWidth = 640, maxHeight, crf = 35, leadingStillDuration = 0 } = options;
const clampedFps = Math.max(1, Math.min(60, fps));
const clampedCrf = Math.max(0, Math.min(63, crf));
const vfParts: string[] = [];
vfParts.push(`fps=${clampedFps}`);
if (maxWidth && maxWidth > 0 && maxHeight && maxHeight > 0) {
vfParts.push(`scale=w=${maxWidth}:h=${maxHeight}:force_original_aspect_ratio=decrease`);
} else if (maxWidth && maxWidth > 0) {
vfParts.push(`scale=w=${maxWidth}:h=-2`);
} else if (maxHeight && maxHeight > 0) {
vfParts.push(`scale=w=-2:h=${maxHeight}`);
}
const av1Encoder = await this.detectAv1Encoder();
if (!av1Encoder) {
throw new Error(
@@ -338,7 +355,12 @@ export class MediaGenerator {
'-i',
videoPath,
'-vf',
vfParts.join(','),
buildAnimatedImageVideoFilter({
fps,
maxWidth,
maxHeight,
leadingStillDuration,
}),
...encoderArgs,
'-y',
outputPath,