H.264 を E-AC3 に変換
端末内ですべて処理しています — 大きなファイルは少し時間がかかる場合があります。
H.264（AVC）は現在もっとも広く使われる動画コーデックです。高い圧縮率と幅広い対応を両立しています。 配信音声を確認用にステレオの MP3/AAC へ変換します。
iLoveConverter はすべてをローカルで処理するため、プライベートで高速です：アップロード待ちもサーバー保存も回数制限もありません。好きなだけファイルを追加でき、一括変換は標準搭載です。
How H.264 compares to E-AC3
| H.264 | E-AC3 | |
|---|---|---|
| Compression | H.264/AVC (lossy) | Dolby Digital Plus (lossy) |
| Transparency | Not supported | Not supported |
| Animation | Video stream only | Not supported |
| Metadata | None (container-level only) | Dolby metadata frames |
| Best for | Pipeline exchange, remuxing into MP4 | Streaming TV, UHD authoring |
H.264 を E-AC3 に変換する方法
- 1
ファイルを選択
- 2
即座に変換
- 3
結果をダウンロード
H.264 形式について
H.264 (also called AVC) is the video codec the entire internet settled on: Blu-ray, YouTube, broadcast TV, every phone camera. A .h264 file is that codec's raw bitstream with no container — no timestamps, no audio, no metadata, just compressed frames back to back. Cameras and capture pipelines emit it because it is the codec's native shape.
Players struggle with raw streams precisely because there is no container to carry timing information. Wrapping H.264 into MP4 or MKV adds timestamps, duration and (optionally) audio tracks — the picture itself is untouched, since remuxing copies the compressed frames as-is.
+長所
- ✓The universal codec — plays everywhere once wrapped
- ✓Native output of cameras and capture cards
- ✓Remuxing is lossless (stream copy)
!短所
- −No container: no timestamps, no audio, no duration
- −Most players refuse or mis-time raw streams
E-AC3 形式について
E-AC3 (Dolby Digital Plus) is the streaming-generation successor of the classic AC3: better audio at roughly half the bitrate, support for up to 15.1 channels, and the mandatory audio codec of UHD Blu-ray and most streaming-TV platforms. Netflix, Amazon and broadcast IPTV all ship it.
For authoring streaming deliverables, E-AC3 at 192-384 kbps is the safe standard. For editing or everyday playback, convert it to WAV/MP3 first — few audio editors accept it natively.
+長所
- ✓Better quality than AC3 at half the bitrate
- ✓The streaming-TV and UHD Blu-ray standard
- ✓Up to 15.1 surround channels
!短所
- −Poor editor/playback support outside TV pipelines
- −Lossy — not for archival masters
H.264 を E-AC3 に変換する理由
どの形式がこの仕事に向いているかを考えるより、まず正しいコンテナに移すのが近道です。No container: no timestamps, no audio, no duration E-AC3 ならこう動きます：Better quality than AC3 at half the bitrate これが求めているものなら、変換を実行してください。数秒で完了し、ファイルは端末から出ません。
よくある質問
Is this H.264 to E-AC3 converter really free?
Yes — completely free, with no sign-up, no watermark and no daily conversion limits. The site is supported by advertising.
Are my files uploaded to a server?
No. The conversion runs entirely inside your browser using WebAssembly, so your files never leave your device — that is what makes it instant and private.
Does it work on Windows, Mac, iPhone and Android?
Yes. Anything with a modern browser works: Windows, macOS, Linux, Android and iOS. No software installation is required.
Is there a file size limit for H.264 to E-AC3?
The only limit is your device's memory, since nothing is uploaded. Files up to a few hundred megabytes work fine on a modern desktop browser; very large files simply take a little longer.
ファイルサイズの上限はありますか？
アップロードがないため上限はメモリだけです。数 GB の動画でも最新のパソコンであれば変換できますが、長い動画ほど時間がかかります。
音声トラックはどうなりますか？
音声は選んだ出力形式に合わせてエンコードされます。音声だけを取り出したい場合は専用の音声抽出ページをご利用ください。