This page details the specifications for all files produced by Capturly.
Every recording session produces three files:
| File | Extension | Content | Purpose |
|---|---|---|---|
| Audio Track | .wav |
Audio only | Primary editing file |
| Video Track | .mp4 |
Video only | Multi-track editing |
| Backup Track | .mp4 |
Video + Audio | Preview and backup |
*_audio.wav)Your primary audio file for podcast editing and production.
| Property | Free Tier | Pro/Lifetime |
|---|---|---|
| Format | WAV (RIFF) | WAV (RIFF) |
| Sample Rate | 48,000 Hz | 96,000 Hz |
| Bit Depth | 16-bit | 24-bit |
| Channels | Mono | Mono |
| Compression | None (PCM) | None (PCM) |
WAV (Waveform Audio File Format) is chosen because:
| Rate | Quality | Use Case |
|---|---|---|
| 48 kHz | Professional standard | Adequate for most podcasts |
| 96 kHz | Studio quality | Maximum detail, larger files |
Higher sample rates capture more audio detail and provide more flexibility in post-production (pitch shifting, time stretching) without artifacts.
| Depth | Dynamic Range | Use Case |
|---|---|---|
| 16-bit | 96 dB | Standard quality |
| 24-bit | 144 dB | Professional quality |
Higher bit depth means greater dynamic range, capturing both quiet and loud sounds with more precision.
| Sample Rate | Bit Depth | Size per Minute | Size per Hour |
|---|---|---|---|
| 48 kHz | 16-bit | ~5.5 MB | ~330 MB |
| 96 kHz | 24-bit | ~17 MB | ~1 GB |
*_video.mp4)Video without audio, optimized for multi-track editing workflows.
| Property | Free Tier | Pro/Lifetime |
|---|---|---|
| Container | MP4 | MP4 |
| Video Codec | H.264 (AVC) | H.264 (AVC) |
| Audio | None | None |
| Max Resolution | 1920x1080 | 3840x2160 |
| Frame Rate | 30 fps | 30 fps |
| Profile | High | High |
The video file deliberately excludes audio to:
Video encoding uses hardware acceleration when available:
| Platform | Technology | GPU |
|---|---|---|
| macOS | VideoToolbox | Apple Silicon / Intel |
| Windows | NVENC | NVIDIA GPUs |
| Windows | QuickSync | Intel CPUs |
| Windows | AMF | AMD GPUs |
| Fallback | libx264 | CPU only |
| Setting | Value |
|---|---|
| Profile | High |
| Level | 4.2 (1080p) / 5.1 (4K) |
| Pixel Format | yuv420p |
| GOP | Variable |
| B-frames | Enabled |
| Resolution | Approx. Bitrate | Size per Minute | Size per Hour |
|---|---|---|---|
| 720p | ~4 Mbps | ~30 MB | ~1.8 GB |
| 1080p | ~8 Mbps | ~60 MB | ~3.5 GB |
| 4K | ~25 Mbps | ~190 MB | ~11 GB |
Actual sizes vary based on content complexity (motion, detail).
*_video-audio.mp4)Combined video and audio as a convenience file.
| Property | Value |
|---|---|
| Container | MP4 |
| Video Codec | H.264 (same as video track) |
| Audio Codec | AAC |
| Audio Sample Rate | 48 kHz |
| Audio Bitrate | 256 kbps |
This file is useful for:
The audio in this file is AAC-compressed, not the full-quality WAV. For best quality, always use the separate *_audio.wav file for editing.
All files follow this naming pattern:
[SessionID]_[DisplayName]_[Date]_[Time]_[Type].[ext]
| Component | Format | Example |
|---|---|---|
| SessionID | 6 alphanumeric characters | A7B3C9 |
| DisplayName | User-entered name | John |
| Date | YYYY-MM-DD | 2026-01-21 |
| Time | HHMMSS (24-hour) | 143022 |
| Type | audio, video, video-audio | audio |
| Extension | wav, mp4 | wav |
A7B3C9_John_2026-01-21_143022_audio.wav
A7B3C9_John_2026-01-21_143022_video.mp4
A7B3C9_John_2026-01-21_143022_video-audio.mp4
Recordings are organized by date:
[Save Location]/
└── [YYYY-MM-DD]/
└── [SessionID]_[Name]_[Date]_[Time]_audio.wav
└── [SessionID]_[Name]_[Date]_[Time]_video.mp4
└── [SessionID]_[Name]_[Date]_[Time]_video-audio.mp4
Documents/Podcasts/
├── 2026-01-20/
│ └── B2C4D6_John_2026-01-20_100015_audio.wav
│ └── B2C4D6_John_2026-01-20_100015_video.mp4
│ └── B2C4D6_John_2026-01-20_100015_video-audio.mp4
└── 2026-01-21/
└── A7B3C9_John_2026-01-21_143022_audio.wav
└── A7B3C9_John_2026-01-21_143022_video.mp4
└── A7B3C9_John_2026-01-21_143022_video-audio.mp4
The beginning of each audio file contains:
This voice slate is used for synchronization in post-production.
Duration: Approximately 2-3 seconds
Compatible with virtually all audio software:
Compatible with:
| Recording Type | Recommended Free Space |
|---|---|
| Audio only (1 hour) | 2 GB |
| Video 1080p (1 hour) | 10 GB |
| Video 4K (1 hour) | 25 GB |