The Online Video Platform accepts a wide range of video and audio formats. This article lists the supported formats and provides recommended export settings for the best transcoding results.
1.0 | Supported file formats
1.1 | Video containers
| Format | Extension(s) |
|---|---|
| MPEG-4 | .mp4, .m4v |
| QuickTime Movie | .mov |
| Matroska | .mkv |
| Audio Video Interleave | .avi |
| WebM | .webm |
| Flash Video | .flv, .f4v |
| Windows Media Video | .wmv, .asf |
| MPEG Transport Stream | .ts, .mts, .m2ts |
| MPEG Program Stream | .mpg, .mpeg |
| Material eXchange Format | .mxf |
| Ogg Video | .ogv |
| 3GPP / 3GPP2 | .3gp, .3g2 |
| DivX | .divx |
| DVD Video Object | .vob |
1.2 | Audio containers
| Format | Extension(s) |
|---|---|
| MPEG Audio Layer 3 | .mp3 |
| Waveform Audio | .wav |
| Advanced Audio Coding | .aac |
| MPEG-4 Audio | .m4a |
| Free Lossless Audio Codec | .flac |
| Ogg Vorbis | .ogg |
| Windows Media Audio | .wma |
1.3 | Video codecs
The following video codecs are supported as input:
- H.264 / AVC (MPEG-4 Part 10)
- H.265 / HEVC (MPEG-H Part 2)
- AV1
- VP8 / VP9
- Apple ProRes (all variants)
- Avid DNxHD / DNxHR
- MPEG-1 / MPEG-2 / MPEG-4 Part 2
- DV / DVCPRO
- Theora
- Windows Media Video (WMV7–WMV9)
- Sorenson Video (1, 3)
1.4 | Audio codecs
The following audio codecs are supported as input:
- AAC / HE-AAC / AAC+
- MP3 (MPEG Audio Layer 3)
- MP2 (MPEG Audio Layer 2)
- AC-3 (Dolby Digital) / E-AC-3
- FLAC
- PCM (all standard variants)
- Vorbis / Opus
- Windows Media Audio (WMA)
2.0 | Recommended upload settings
For the best transcoding results, use the following export settings when delivering source files to the platform.
Recommended container: MP4 (.mp4) is the most universally compatible container and the preferred format for upload.
There is no enforced file size limit. Multipart uploads are supported for large files.
2.1 | Video codec: H.264
H.264 is the recommended video codec for upload. The platform also accepts ProRes and DNxHD/DNxHR as high-quality intermediate formats for broadcast and editing workflows.
- Profile: Main for standard definition (below 720p); High for high definition (720p and above)
- Scanning: Progressive
Transcoding always produces progressive output. The platform automatically detects and deinterlaces interlaced source files, but uploading a progressive source yields the best results.
- Aspect ratio: 16:9 preferred, but any aspect ratio is accepted. Do not letterbox or add black bars: the platform handles aspect ratio automatically.
- Frame rate: 24–60 fps; the original frame rate is preserved.
Most containers use a constant frame rate (for example, 25 fps). Some use a variable frame rate (VFR), which can cause audio sync issues. Variable frame rate is not recommended.
- Bitrate (upload source):
Resolution Recommended bitrate 480p 2.5–5 Mbps 720p 5–10 Mbps 1080p 10–20 Mbps 4K / UHD 40–80 Mbps
2.2 | Audio codec: AAC
- Sample rate: 44.1 kHz or 48 kHz; 48 kHz preferred
- Bitrate (upload source):
Channels Recommended bitrate Mono 192 kbps Stereo 320 kbps 5.1 surround 512 kbps
3.0 | Notes for broadcast workflows
3.1 | MXF files
MXF files require special handling. Please contact support@bluebillywig.com to discuss transcoding presets.
3.2 | Interlaced content
For standard uploads, the platform automatically samples 200 frames to detect interlacing and applies deinterlacing when needed. No configuration is required.
MXF files are an exception: automatic detection is not applied. Deinterlacing must be enabled explicitly in the transcoding preset. Contact support@bluebillywig.com to configure this for your MXF workflow.
Uploading a progressive source file always produces the cleanest result regardless of format.