java-projects/ffmpegbot
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Add audio compressor

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This commit is contained in:
aNNiMON 2024-09-15 23:19:58 +03:00
parent bebc9ce911
commit 39a44c3735
5 changed files with 89 additions and 1 deletions
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3
README.md
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@ -6,9 +6,10 @@ Telegram Bot for re-encoding media
- change a video resolution, bitrate, frame rate, speed
- change an audio bitrate, volume, pitch
- apply audio effects
- apply audio effects, compressor
- extract or remove audio from the video
- resend video note as a regular video, or video as an audio track
- output audio spectrum for quick analysis
## Requirements

24
src/main/java/com/annimon/ffmpegbot/commands/ffmpeg/FFmpegCommandBuilder.java
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@ -49,6 +49,30 @@ public class FFmpegCommandBuilder implements Visitor<MediaSession> {
audioCommands.add(p.getValue());
}
@Override
public void visit(AudioCompressor p, MediaSession input) {
if (discardAudio) return;
if (p.getValue().isEmpty()) return;
audioFilters.add(switch (p.getValue()) {
case AudioCompressor.COMP_2_6DB -> "compand=points=-80/-80|-6/-6|0/-3.8|20/3.5";
case AudioCompressor.COMP_2_12DB -> "compand=points=-80/-80|-12/-12|0/-6.8|20/1.9";
case AudioCompressor.COMP_2_18DB -> "compand=points=-80/-80|-18/-18|0/-9.8|20/0.7";
case AudioCompressor.COMP_3_9DB -> "compand=points=-80/-80|-9/-9|0/-3.8|20/-2.1";
case AudioCompressor.COMP_3_18DB -> "compand=points=-80/-80|-18/-18|0/-6.8|20/-4.5";
case AudioCompressor.COMP_NORMALIZE_1 -> "compand=.3|.3:1|1:-90/-60|-60/-40|-40/-30|-20/-20:6:0:-90:0.2";
case AudioCompressor.COMP_NORMALIZE_2 -> "compand=0|0:1|1:-90/-900|-70/-70|-30/-9|0/-3:6:0:0:0";
case AudioCompressor.COMP_NOISE_GATE_1 -> "compand=points=-80/-900|-45/-15|-27/-9|0/-7|20/-7:attacks=0";
case AudioCompressor.COMP_NOISE_GATE_2 -> "compand=.1|.1:.2|.2:-900/-900|-50.1/-900|-50/-50:.01:0:-90:.1";
case AudioCompressor.COMP_HARD_LIMITER_6DB -> "compand=attacks=0:points=-80/-80|-6/-6|20/-6";
case AudioCompressor.COMP_HARD_LIMITER_12DB -> "compand=attacks=0:points=-80/-80|-12/-12|20/-12";
case AudioCompressor.COMP_HARD_NOISE_GATE_35DB -> "compand=attacks=0:points=-80/-115|-35.1/-80|-35/-35|20/20";
case AudioCompressor.COMP_SOFT_LIMITER -> "compand=attacks=0:points=-80/-80|-12.4/-12.4|-6/-8|0/-6.8|20/-2.8";
case AudioCompressor.COMP_EXPANDER -> "compand=attacks=0:points=-80/-169|-54/-80|-49.5/-64.6|-41.1/-41.1|-25.8/-15|-10.8/-4.5|0/0|20/8.3";
case AudioCompressor.COMP_GATE -> "compand=points=-80/-105|-62/-80|-15.4/-15.4|0/-12|20/-7.6";
default -> "compand";
});
}
@Override
public void visit(AudioCrystalizer p, MediaSession input) {
if (discardAudio) return;

1
src/main/java/com/annimon/ffmpegbot/commands/ffmpeg/Visitor.java
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@ -5,6 +5,7 @@ import com.annimon.ffmpegbot.parameters.*;
public interface Visitor<I> {
void visit(DisableAudio p, I input);
void visit(AudioBitrate p, I input);
void visit(AudioCompressor p, I input);
void visit(AudioCrystalizer p, I input);
void visit(AudioEffect p, I input);
void visit(AudioPitch p, I input);

60
src/main/java/com/annimon/ffmpegbot/parameters/AudioCompressor.java Normal file
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@ -0,0 +1,60 @@
package com.annimon.ffmpegbot.parameters;
import com.annimon.ffmpegbot.commands.ffmpeg.Visitor;
import java.util.List;
public class AudioCompressor extends StringParameter {
public static final String ID = "acompand";
public static final String COMP_DEFAULT = "Default";
public static final String COMP_2_6DB = "2:1 at -6dB";
public static final String COMP_2_12DB = "2:1 at -12dB";
public static final String COMP_2_18DB = "2:1 at -18dB";
public static final String COMP_3_9DB = "3:1 at -9dB";
public static final String COMP_3_18DB = "3:1 at -18dB";
public static final String COMP_NORMALIZE_1 = "Normalize 1";
public static final String COMP_NORMALIZE_2 = "Normalize 2";
public static final String COMP_NOISE_GATE_1 = "Noise Gate 1";
public static final String COMP_NOISE_GATE_2 = "Noise Gate 2";
public static final String COMP_HARD_NOISE_GATE_35DB = "Noise Gate 35dB";
public static final String COMP_HARD_LIMITER_6DB = "Hard Limiter -6dB";
public static final String COMP_HARD_LIMITER_12DB = "Hard Limiter -12dB";
public static final String COMP_SOFT_LIMITER = "Soft Limiter";
public static final String COMP_EXPANDER = "Expander";
public static final String COMP_GATE = "Gate";
private static final List<String> VALUES = List.of(
"", COMP_DEFAULT,
COMP_2_6DB, COMP_2_12DB, COMP_2_18DB,
COMP_3_9DB, COMP_3_18DB,
COMP_NORMALIZE_1, COMP_NORMALIZE_2,
COMP_NOISE_GATE_1, COMP_NOISE_GATE_2,
COMP_HARD_NOISE_GATE_35DB,
COMP_HARD_LIMITER_6DB, COMP_HARD_LIMITER_12DB,
COMP_SOFT_LIMITER,
COMP_EXPANDER, COMP_GATE
);
public AudioCompressor() {
super(ID, "\uD83D\uDD08 Compressor", VALUES, "");
}
@Override
public String describeValue(String value) {
if (value.isEmpty()) {
return "NONE";
} else {
return super.describeValue(value);
}
}
@Override
public int defaultColumnsCount() {
return 3;
}
@Override
public <I> void accept(Visitor<I> visitor, I input) {
visitor.visit(this, input);
}
}

2
src/main/java/com/annimon/ffmpegbot/parameters/resolvers/AudioResolver.java
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@ -22,6 +22,7 @@ public class AudioResolver implements ParametersResolver {
disableAudioParam(parameters, fileInfo.fileType());
parameters.addAll(List.of(
new AudioBitrate(),
new AudioCompressor(),
new AudioCrystalizer(),
new AudioEffect(),
new AudioPitch(),
@ -36,6 +37,7 @@ public class AudioResolver implements ParametersResolver {
.ifPresent(p -> {
final Set<String> parameterIds = Set.of(
AudioBitrate.ID,
AudioCompressor.ID,
AudioCrystalizer.ID,
AudioEffect.ID,
AudioPitch.ID,