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1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteFor a live FFmpeg audio feed, use the loudnorm filter in single-pass mode and set its integrated loudness (I), loudness range (LRA), and true-peak ceiling (TP) to targets chosen for your actual destination. FFmpeg supports this workflow for livestreams, but its documentation does not specify an India-specific target or a universal music-stream requirement.
What FFmpeg loudness normalization does
FFmpeg’s loudnorm filter implements EBU R128 loudness normalization. It can operate in dynamic or linear mode and control three targets: integrated loudness, loudness range, and maximum true peak. Integrated loudness describes the overall perceived level across the measured program; loudness range describes variation in level; true peak limits reconstructed peaks that can exceed the digital sample peaks.
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The FFmpeg Project documents single-pass operation for livestreams and files, and double-pass operation for files. For a live input, single-pass is the relevant starting point because the complete program is not available to measure in advance. See the FFmpeg Filters Documentation, section 8.97.
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Choose targets for the actual stream
Do not treat FFmpeg’s defaults as an Indian broadcast standard or as a YouTube requirement. The documentation defines filter defaults and permitted ranges, but does not choose a target for a particular Indian music stream. Confirm any required loudness and peak limits with the destination platform or distribution chain before presenting them as compliance requirements.
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| Option | Meaning | FFmpeg documented default | Allowed range |
|---|---|---|---|
I |
Target integrated loudness, in LUFS | -24.0 | -70 to -5 |
LRA |
Target loudness range, in LU | 7.0 | 1 to 50 |
TP |
Maximum true-peak target, in dBTP | -2.0 | -9 to 0 |
These defaults and ranges are from the FFmpeg Project’s current filter documentation, accessed in 2026. A value in the allowed range is not automatically suitable for your service, music, or listening goals. The illustrative values below are examples only, not a recommendation or a guarantee of compliance.
Apply single-pass normalization to a live input
Command template
Use this shape for a live source, replacing the input, output, encoder, and target values with ones appropriate to your setup:
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ffmpeg -re -i INPUT -af "loudnorm=I=-18:LRA=11:TP=-2" -c:a aac -b:a 192k -f flv OUTPUT
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I=-18, LRA=11, and TP=-2 are illustrative values only. INPUT and OUTPUT are placeholders; the input source, audio codec, bitrate, container, and destination URL must match your actual stream. This example shows filter placement, not a complete, verified 24/7 streaming system.
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Check the result and delivery requirements
- Confirm that FFmpeg accepts the filter options and that the output reaches your intended destination.
- Listen across different tracks, transitions, intros, and quiet passages. Normalization can adjust overall level, but a chosen target does not make every mix sound equally balanced or remove abrupt changes within a song.
- Check the destination’s current stream requirements separately. The FFmpeg filter reference does not establish platform-specific loudness targets.
When to use two-pass processing instead
If you are preparing files rather than normalizing a live input, two-pass processing lets FFmpeg measure the material first and then normalize it using those measurements. FFmpeg documents double-pass mode for files, not livestreams. Linear mode requires measured integrated loudness, loudness range, true peak, and threshold values; it can fall back to dynamic mode if the requested loudness range is below the source range or the loudness change would push true peak over the target.
Sample rate and mono considerations
In dynamic mode, FFmpeg upsamples internally to 192 kHz for true-peak detection. That is an internal detection behavior; it does not mean your delivered stream must use a 192 kHz sample rate. The documentation says you can set the output sample rate with -ar or aresample when needed.
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For mono audio intended for stereo playback, consider the filter’s dual_mono option. FFmpeg notes that ordinary EBU R128 measurement may be perceptually incorrect in that situation. Use it only when the source and playback setup match that case.
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loudnorm processes audio; it does not establish playlist handling, automatic restart, recovery after a dropped destination connection, or uninterrupted 24/7 operation. Those require separate operational design and verification. Test the complete streaming chain and have a way to detect and recover from failures.
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