Files
everything-claude-code/docs/ja-JP/skills/remotion-video-creation/rules/can-decode.md
T
Claude 174e31b3fc feat(ja-JP): add skill sub-reference translations (angular, remotion, etc.)
Translated 85 skill sub-reference files to achieve full parity with
the English source:

- skills/angular-developer/references/ — 35 files (all references)
- skills/remotion-video-creation/rules/ — 28 files (all rules)
- skills/tinystruct-patterns/references/ — 5 files
- skills/openclaw-persona-forge/references/ — 6 files
- skills/skill-comply/prompts/ — 3 files
- skills/lead-intelligence/agents/ — 4 files
- skills/brand-voice/references/ — 1 file
- skills/frontend-slides/ — 2 files
- hooks/memory-persistence/README.md — 1 file

English source parity: 0 missing files (excluding rules/zh/, internal
docs, and experimental examples absent from zh-CN)
2026-05-18 06:15:26 +09:00

1.7 KiB

name, description, metadata
name description metadata
can-decode Mediabunnyを使用してブラウザで動画をデコードできるか確認する
tags
decode, validation, video, audio, compatibility, browser

動画がデコードできるか確認する

再生を試みる前に、Mediabunnyを使用してブラウザで動画をデコードできるか確認します。

canDecode() 関数

この関数はどのプロジェクトにもコピー&ペーストできます。

import { Input, ALL_FORMATS, UrlSource } from "mediabunny";

export const canDecode = async (src: string) => {
  const input = new Input({
    formats: ALL_FORMATS,
    source: new UrlSource(src, {
      getRetryDelay: () => null,
    }),
  });

  try {
    await input.getFormat();
  } catch {
    return false;
  }

  const videoTrack = await input.getPrimaryVideoTrack();
  if (videoTrack && !(await videoTrack.canDecode())) {
    return false;
  }

  const audioTrack = await input.getPrimaryAudioTrack();
  if (audioTrack && !(await audioTrack.canDecode())) {
    return false;
  }

  return true;
};

使用方法

const src = "https://remotion.media/video.mp4";
const isDecodable = await canDecode(src);

if (isDecodable) {
  console.log("Video can be decoded");
} else {
  console.log("Video cannot be decoded by this browser");
}

Blobとの使用

ファイルのアップロードやドラッグ&ドロップには BlobSource を使用します:

import { Input, ALL_FORMATS, BlobSource } from "mediabunny";

export const canDecodeBlob = async (blob: Blob) => {
  const input = new Input({
    formats: ALL_FORMATS,
    source: new BlobSource(blob),
  });

  // 上記と同じバリデーションロジック
};