GRIDSHOT® recommends the following specifications for best broadcast experience. In addition, we also recommend that the content bitrate is always higher than playout output. Delivery in other formats will be accepted after test files have successfully been delivered, tested and agreed to by theFrontDoor in advance.
ISOBMFF MP4 (MPEG-4) *.mp4
| Resolution | 3840 × 2160px |
| Scan type1 | Progressive |
| Aspect Ratio | 16:9 (DAR) 1:1 (PAR) |
| Codec | HEVC / H.265 (Main or Main10)2 or H.264 (High@L5.2) |
| Bitrate | HEVC / H.265: Between 15 - 50 Mbps (CBR)3
H.264: Between 40 - 80 Mbps (CBR)3 |
| Framerate | 50 fps (or 25 fps the playout will duplicate each frame) |
| HDR | Optional: HDR HLG. Content must be natively recorded and mastered in HDR HLG. The video file must have the transfer_coefficient tagged as arib-std-b67(18). Alternatively, for HEVC sources the alternative_transfer_coefficient in the SEI is also accepted if it is tagged as arib-std-b67(18). |
| Resolution | 1920 x 1080px
1280 x 720px (720p is always progressive) |
| Scan type1 |
Interlaced (Top field first) preferred
|
| Aspect Ratio | 16:9 (DAR) 1:1 (PAR) |
| Codec | H.264 (High@L4.1) |
| Bitrate | Between 15 - 50 Mbps (CBR)3 |
| Framerate | 25 fps |
| Resolution | 720 x 576px |
| Scan type1 |
Interlaced (Top field first) preferred
|
| Aspect Ratio | 16:9 or 4:3 Anamorphic |
| Codec | MPEG-2
H.264 / AVC (High@L3.1) |
| Bitrate | Between 15 - 50 Mbps (CBR)3 |
| Framerate | 25 fps |
1For the best result interlaced content should be intrinsically fully interlaced and therefore preferably not result from prior frame rate conversions and/or telecine sources.
1If the source is 8-bit, transcode to the Main profile. If it is 10-bit, then Main 10.
3Higher bitrate will incur increased storage cost and cost more time for uploading to GRIDSHOT Media Asset Management (MAM).
| Codec | AAC-LC preferred for best quality
MPEG Version 1 Layer 3 |
| Sampling rate | 48000 Hz |
| Bitrate | >= 256 Kbit/s (for compressed audio codec) |
| Loudness | Peaks preferably don’t exceed -3 dbFS or should conform to EBU R128 |
| Channel layout | Stereo interleaved (dual mono is not allowed) |
| Channel count | 2 |
GRIDSHOT® supports unlimited number of languages
ISOBMFF MP4 (MPEG-4) *.mp4 or *.m4a, MP3 *.mp3
| Codec | AAC-LC preferred for best quality
MPEG Version 1 Layer 3 |
| Sampling rate | 48000 Hz |
| Bitrate | >= 256 Kbit/s (for compressed audio codec) |
| Loudness | Peaks preferably don’t exceed -3 dbFS or should conform to EBU R128 |
| Channel layout | Stereo interleaved (dual mono is not allowed) |
| Channel count | 2 |
WAVE (*.wav)
| Codec | PCM S16 LE |
| Sampling rate | 48000 Hz |
| Loudness | Peaks preferably don’t exceed -3 dbFS or should conform to EBU R128 |
| Channel layout | Stereo interleaved (dual mono is not allowed) |
| Channel count | 2 |
*.srt (SubRip)