Исходный формат
MP4 is a widely supported media container, commonly carrying H.264 or H.265 video and AAC audio.
MP4
MP4 is a file format supported by Convertr for online file conversion workflows.
M4A
M4A is a file format supported by Convertr for online file conversion workflows.
What happens when MP4 becomes M4A
Формат целевого
M4A is an MPEG-4 audio container that commonly carries AAC or Apple Lossless audio.
Какие изменения
The audio stream is decoded from the MP4 container and encoded as M4A audio.
The video track, frames, subtitles, chapters, and visual metadata are not included in the audio output.
- Что сохраняется
- Audio duration and channel layout are preserved when the source stream and target codec support them.
- What may be lost
- All visual content is intentionally discarded.
- Codec and quality implications
- Inspect the output before replacing the source, especially when the formats use different layout, codec, or editing models.
- Realistic limitations
- A MP4 file with no decodable audio stream cannot produce M4A audio. Corrupt, encrypted, or unsupported codecs can also fail.
Шаги конверсии
- Upload a MP4 file no larger than 1 GB.
- Confirm that M4A is selected as the target.
- Start the conversion. A healthy compatible worker begins processing immediately.
- Download the M4A file and check the result before deleting your source.
Проблемное решение
- The MP4 file is rejected or will not open.
- Confirm that the file is not empty, password-protected, or corrupt and that its real format matches the extension.
- The M4A file is larger than expected.
- Choose a more efficient codec or lower quality setting when available. Lossless and uncompressed targets are often larger by design.
- The result has no sound or will not play.
- Try a broadly supported target codec and verify that the source contains a decodable audio stream.
Приватность и сохранение файлов
Uploads and converted files are processed automatically and irreversibly deleted within 24 hours. You can delete them sooner with the delete control. Convertr does not read, mine, sell, or manually review file contents.
Read the privacy policy