Question 1

libebur128 vs ffmpeg loudnorm filter which is better for broadcasting?

Accepted Answer

libebur128 is specialized for strict EBU R128 compliance with true peak scanning, making it more accurate for certification-critical applications. ffmpeg's loudnorm is part of a broader toolkit and may not implement all modes as precisely, but it's easier for quick integrations.

Question 2

How to integrate libebur128 into a C++ audio application?

Accepted Answer

Include the ebur128.h header, link against the compiled library, and follow the minimal-example.c in the tests folder. Use functions like ebur128_add_frames to process audio data and ebur128_loudness_global for measurements.

Question 3

Does libebur128 work with real-time audio on Raspberry Pi?

Accepted Answer

Yes, its ANSI C code is portable, but real-time performance depends on CPU load. The library's windowed monitoring functions can help, but you should benchmark for latency in resource-constrained environments.

Question 4

What's the difference between M, S, and I modes in libebur128?

Accepted Answer

M mode measures momentary loudness, S mode measures short-term loudness, and I mode measures integrated loudness over the entire program. libebur128 supports all three as per the EBU R128 standard for comprehensive analysis.

Question 5

How accurate is libebur128 for music streaming loudness normalization?

Accepted Answer

It's highly accurate for EBU R128 compliance, with true peak scanning to prevent distortion. However, for streaming services like Spotify, you may need to adapt thresholds, as libebur128 focuses on broadcast standards.

Question 6

Can libebur128 handle multi-channel audio like 5.1 surround sound?

Accepted Answer

Yes, it supports multiple channels with functions like ebur128_set_channel, but ensure to use the correct channel definitions from ITU R-REC-BS 1770-4, as mentioned in the v1.1.0 updates.

Libebur128

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