تنسيق المصدر
M4A is an MPEG-4 audio container that commonly carries AAC or Apple Lossless audio.
M4A
M4A is a file format supported by Convertr for online file conversion workflows.
AAC
AAC is a file format supported by Convertr for online file conversion workflows.
What happens when M4A becomes AAC
تنسيق الهدف
AAC is a lossy audio codec that is efficient at moderate bitrates.
ما هي التغييرات
Audio samples are decoded from M4A and encoded according to the AAC format and selected bitrate or quality.
- ما الذي يُحفظ
- Duration and audible content are preserved, subject to decoder support and any settings you change.
- What may be lost
- Tags, embedded artwork, chapters, and codec-specific metadata may not map to AAC.
- Codec and quality implications
- AAC uses lossy compression. A higher quality or bitrate can reduce new artifacts, but it cannot restore detail already missing from the M4A source.
- Realistic limitations
- Protected audio, malformed headers, unsupported codec variants, or files without a decodable audio stream cannot be converted.
خطوات التحويل
- Upload a M4A file no larger than 1 GB.
- Confirm that AAC is selected as the target.
- Start the conversion. A healthy compatible worker begins processing immediately.
- Download the AAC file and check the result before deleting your source.
حل المشاكل
- The M4A 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 AAC 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.
الخصوصية والحفاظ على الملفات
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.
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