Opened 3 months ago
Last modified 3 months ago
#10836 new enhancement
ebur128: Support tracking max short term loudness
| Reported by: | hsn | Owned by: | |
|---|---|---|---|
| Priority: | wish | Component: | avfilter |
| Version: | 6.1 | Keywords: | ebur128 |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
Delivery standard enforced by TV usually looks like:
Audio:
- 8 AES audio tracks with one audio channel each /24 Bit
- EBU norm R128
- Programme loudness: -23 LUFS +/- 0.5 LU
- Maximum short term loudness: -18 LUFS (= +5 LU relative)
- Maximum true peak level: -3 dBTP (= dBFS measured with oversampling true peak meter)
ebur128 filter already supports short term loudness computation and printing per frame but it doesn't track maximum reached level and prints it in summary. Tracking highest short term loudness level is needed for making ebur128 filter usable for broadcast QA checks.
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I was gonna say this can be calculated from the individual values by anybody who parses the output, but since there is a summary section in the end, we might as well print the max...
Still an enhancement/wish request though...