Comments (3)
Use:
ffmpeg-normalize original.mp3 -f -c:a libmp3lame -b:a 320k -nt peak -t -1 --output normalized.mp3
Note that when performing this kind of modification, the audio stream has to be re-encoded. In the above case, it will be re-encoded to MP3 using the libmp3lamer encoder at 320 kBit/s. The bitrate is chosen in order to preserve the quality of the content as much as possible, because re-encoding causes generation loss.
I don't know your exact use case, but you may want to look at MP3Gain. It does not re-encode the files and instead targets a particular volume using metadata only.
from ffmpeg-normalize.
Use:
ffmpeg-normalize original.mp3 -f -c:a libmp3lame -b:a 320k -nt peak -t -1 --output normalized.mp3
Note that when performing this kind of modification, the audio stream has to be re-encoded. In the above case, it will be re-encoded to MP3 using the libmp3lamer encoder at 320 kBit/s. The bitrate is chosen in order to preserve the quality of the content as much as possible, because re-encoding causes generation loss.
I don't know your exact use case, but you may want to look at MP3Gain. It does not re-encode the files and instead targets a particular volume using metadata only.
Thank you so much for the script! I checked the normalized version and whatever quality was lost, it's not noticeable at all. This is also more for personal use and I have all the WAV versions anyway if I need to have the full quality audio.
I looked at MP3Gain, but it seems to be Windows only and I have a Mac.
I saw that there's some app version (http://projects.sappharad.com/mp3gain/), but 1) it doesn't have the peak normalize feature. It seems to be just an app to add or remove gain. And 2) I need something that works inside Keyboard Maestro, because I will be creating macros and I'm using its Shell Script actions.
Again, I appreciate your time and help! :)
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Understood, in that case the above command is probably all you need! Glad to have been able to help.
from ffmpeg-normalize.
Related Issues (20)
- Different audio_bitrate for different surround/stereo sound streams HOT 13
- Surround sound 5.1 is (merged to?) stereo HOT 8
- chmod: /usr/local/bin/ffprobe: No such file or directory HOT 2
- When running on a folder of mp3s, nearly all of them report loudness range larger than the loudness range target HOT 1
- Normalize entire music library at same volume HOT 2
- Reverting to dynamic normalization regardless of the command I try HOT 6
- Cover no longer added HOT 3
- Specify output folder and create one if doesn't exist HOT 2
- Add possible to select stream to normalize HOT 1
- Error When Using an Apostrophe ior Ampersand in Pathname HOT 5
- dynamic mode: Change in integrated loudness shouldn’t result in a true peak which exceeds the target TP HOT 12
- Loudness normalization for files with very low sound HOT 3
- Combining ffmpeg-normalize with ffmpeg pan filer HOT 6
- show warning when using non-default target level HOT 5
- List index out of range when running normalization HOT 3
- Can't find ffmpeg.exe with ffmpeg_path set HOT 3
- lrt doesn't work and Error opening output file HOT 1
- Docker Hub Image HOT 4
- Guidance for tuning for audiobooks HOT 12
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