Convert Adaptive Multi-Rate Audio (.amr) to Matroska Video (.mkv) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .amr file by dragging it into the upload area or clicking to browse.
Choose your output settings. The default settings work great for most files.
Click Convert and download your .mkv file when it's ready.
MKV (Matroska Video) is an open-source multimedia container that can hold virtually any combination of audio, video, and subtitle streams. While MKV is primarily associated with video, it also works as a highly flexible audio container. Converting AMR to MKV wraps the decoded voice audio in Matroska's extensible framework, enabling advanced features like chapters, tags, and multiple audio tracks.
MKV makes sense when you need to bundle a voice recording with metadata that simpler containers cannot handle — chapter markers for a long interview, embedded subtitles or transcripts, or multiple language tracks. MKV also serves as an intermediate format in multimedia workflows where the audio will later be combined with video using tools like MKVToolNix or FFmpeg.
FFmpeg decodes the AMR audio to PCM and can either copy it as PCM into the MKV container or re-encode to a more common codec (Vorbis, AAC, or FLAC). The Matroska container adds full metadata support including chapters (XML-based), tags, and track metadata. The output is compatible with VLC, MPV, and MKVToolNix.
If the audio is encoded to FLAC or PCM inside MKV, quality is lossless. If encoded to Vorbis or AAC, a standard 128 kbps bit rate preserves all voice content from the AMR source without perceptible loss.
| Device | AMR | MKV |
|---|---|---|
| Windows PC | Partial | Partial |
| macOS | Partial | Partial |
| iPhone/iPad | Partial | Partial |
| Android | Partial | Partial |
| Linux | Partial | Partial |
| Web Browser | No |
Resolution: N/A
Bitrate: 320 kbps
OGG Vorbis preferred
Resolution: N/A
Bitrate: 256 kbps
AAC format required
Resolution: N/A
Bitrate: 128 kbps
Lossless FLAC/WAV for best quality
Resolution: N/A
Bitrate: 128 kbps
MP3 mono for spoken word
AMR to MKV is useful for advanced multimedia workflows that need MKV's chapter, metadata, or multi-track capabilities. For simple playback, M4A or MP3 is easier.
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Funguje všude
Jakýkoli prohlížeč, jakékoli zařízení
| No |
| Vlastnost | AMR | MKV |
|---|---|---|
| Celý název | Adaptive Multi-Rate Audio | Matroska Video |
| Přípona | .amr | .mkv |
| Nejlepší pro | Speech optimized | Multiple audio tracks |