Convert Standard MIDI (.mid) to Flash Video (.flv) online for free. Fast, secure audio conversion with no watermarks or registration.
Upload your .mid 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 .flv file when it's ready.
MID (Standard MIDI File) encodes musical performance as structured event data — note triggers, velocity, timing, instrument assignments — in a compact format created in 1983. MIDI files average 10-100 KB because they store instructions, not audio waveforms. Playback requires a synthesizer to interpret these instructions and produce sound.
FLV (Flash Video) is Adobe's legacy streaming container, historically the backbone of web video via Flash Player. Converting MID to FLV renders the MIDI through a software synthesizer and packages the audio into an FLV container. Since Flash Player reached end-of-life in December 2020, this conversion serves primarily for legacy content management systems and archival compatibility.
Some legacy content management systems, media servers, and archival workflows still require FLV format. Educational platforms, older LMS installations, and corporate intranets built on Flash-era infrastructure may only ingest FLV files. Converting MIDI renders to FLV enables integration with these systems.
FLV also serves as a lightweight streaming container when used with RTMP-based media servers. If your streaming infrastructure predates modern HLS/DASH protocols, FLV may be the required delivery format for rendered MIDI audio.
FFmpeg decodes the MIDI file using its built-in MIDI decoder and synthesizer, rendering all channels to PCM audio. The audio is then encoded — typically as MP3 or AAC — and wrapped in an FLV container. Since MIDI contains no visual data, the FLV output contains only an audio stream with FLV's tag-based structure (audio tags with timestamps). The FLV container uses a simplified header and tag format optimized for streaming, with optional metadata in a scriptData tag.
FLV is just a container — audio quality depends on the codec used inside it. MP3 at 192-320 kbps or AAC at 128-256 kbps within FLV delivers standard lossy audio quality. The primary quality variable remains the SoundFont and synthesizer used to render the MIDI, not the FLV container or audio codec. The container itself adds no degradation beyond the chosen codec's compression.
| Device | MID | FLV |
|---|---|---|
| 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
MID to FLV converts MIDI instructions into a legacy streaming container. This conversion is niche — use it only when legacy systems specifically require FLV format.
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| No |
| Tính năng | MID | FLV |
|---|---|---|
| Tên đầy đủ | Standard MIDI File | Flash Video |
| Phần mở rộng | .mid | .flv |
| Phù hợp nhất cho | Musical performance data | Small file size |