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AudioTrackApply[f,video]

将函数 f 应用于 Video 对象 video 的第一个音频轨道.

更多信息和选项
Details and Options Details and Options
范例  
基本范例  
范围  
选项  
AudioEncoding  
AudioTrackSelection  
CompressionLevel  
GeneratedAssetLocation  
OverwriteTarget  
属性和关系  
参见
相关指南
历史
按以下格式引用：

AudioTrackApply

AudioTrackApply[f,video]

将函数 f 应用于 Video 对象 video 的第一个音频轨道.

更多信息和选项

范例

打开所有单元 关闭所有单元

基本范例  (1)

将低通滤波器应用于某视频的音频轨道：

Wolfram Language code: v = AudioTrackApply[LowpassFilter[#, Quantity[2000, "Hertz"], 101]&, Video["ExampleData/Caminandes.mp4"]]

显示结果的光谱图：

Wolfram Language code: Audio[v]//Spectrogram

范围  (2)

整段音频轨道作为一个 Audio 对象被函数使用. 正态化变换该音频轨道：

Wolfram Language code: v = Video["ExampleData/rule30.mp4"];
Wolfram Language code: AudioTrackApply[AudioNormalize, v]
Wolfram Language code: AudioPlot[Audio[%]]

在音频上做频率频移：

Wolfram Language code: v = Video["ExampleData/Caminandes.mp4"];
Wolfram Language code: AudioTrackApply[audio  AudioFrequencyShift[audio, # ^ 2&], v]

显示转换音频轨道的光谱图：

Wolfram Language code: Spectrogram[Audio[%]]

选项  (6)

AudioEncoding  (1)

默认情况下，AudioTrackApply 会尝试储存原始音频轨道的编码：

Wolfram Language code: in = Video["ExampleData/Caminandes.mp4"]; Information[in, "AudioTracks"]
Wolfram Language code: v = AudioTrackApply[LowpassFilter[#, Quantity[2000, "Hertz"], 101]&, in]; Information[v, "AudioTracks"]

指定需要用的音频编码：

Wolfram Language code: encoding = RandomChoice[$AudioEncoders["MP4"]]
Wolfram Language code: v = AudioTrackApply[LowpassFilter[#, Quantity[2000, "Hertz"], 101]&, in, AudioEncoding -> encoding[[1]]]; Information[v, "AudioTracks"]

AudioTrackSelection  (1)

默认情况下，函数应用于输入视频的第一个音频轨道：

Wolfram Language code: in = Video["ExampleData/bullfinch.mkv"]; audioFunc[audio_] := LowpassFilter[audio, Quantity[2000, "Hertz"], 101]; v = AudioTrackApply[audioFunc, in]

所有剩余轨道都复制到结果中：

Wolfram Language code: Spectrogram /@ Table[Audio@Video[v, AudioTrackSelection -> i], {i, 3}]

选择函数会应用的音频轨道：

Wolfram Language code: v = AudioTrackApply[audioFunc, in, AudioTrackSelection -> 3]; Spectrogram /@ Table[Audio@Video[v, AudioTrackSelection -> i], {i, 3}]

使用 AudioTrackSelectionAll 可将函数应用于所有输入轨道：

Wolfram Language code: v = AudioTrackApply[audioFunc, in, AudioTrackSelection -> All]; Spectrogram /@ Table[Audio@Video[v, AudioTrackSelection -> i], {i, 3}]

CompressionLevel  (1)

使用 CompressionLevel 选项可控制被处理轨道的压缩等级：

Wolfram Language code: in = Video["ExampleData/bullfinch.mkv"];
Wolfram Language code: Table[ FileSize@Information[AudioTrackApply[Identity, in, CompressionLevel -> c, AudioEncoding -> "FLAC"], "ResourcePath"], {c, 0, 1, .3} ]

GeneratedAssetLocation  (2)

资源会在 $WolframDocumentsDirectory 中的 "Video" 文件夹中自动生成：

Wolfram Language code: in = Video["ExampleData/bullfinch.mkv"]; Information[AudioTrackApply[Identity, in], "ResourcePath"]

指定生成资源的地址：

Wolfram Language code: v = AudioTrackApply[Identity, in, GeneratedAssetLocation -> "file.mkv"]; Information[v, "ResourcePath"]

使用 LocalObject 作为结果 Video 对象的资源：

Wolfram Language code: in = Video["ExampleData/bullfinch.mkv"]; v = AudioTrackApply[Identity, in, GeneratedAssetLocation -> LocalObject[]]; Information[v, "ResourcePath"]

OverwriteTarget  (1)

默认情况下，如果文件已经存在，则其没有被覆写：

Wolfram Language code: in = Video["ExampleData/bullfinch.mkv"]; v = AudioTrackApply[Identity, in, GeneratedAssetLocation -> "file.mkv"];

可通过指定 OverwriteTargetTrue 覆写已存在的文件：

Wolfram Language code: v = AudioTrackApply[Identity, in, GeneratedAssetLocation -> "file.mkv", OverwriteTarget -> True]; Information[v, "ResourcePath"]

属性和关系  (1)

AudioTrackApply 将函数应用于视频文件的音轨并返回音轨已处理过的视频：

Wolfram Language code: v = Video["ExampleData/bullfinch.mkv"];
Wolfram Language code: AudioPlot[Audio[v]]
Wolfram Language code: AudioTrackApply[AudioNormalize, v]

显示转换后的音轨图：

Wolfram Language code: AudioPlot[Audio[%]]

如果只想获取转换后的音轨，请先从视频中提取音轨：

Wolfram Language code: a = Audio[v]
Wolfram Language code: AudioNormalize[a]//AudioPlot
Wolfram Research (2020)，AudioTrackApply，Wolfram 语言函数，https://reference.wolfram.com/language/ref/AudioTrackApply.html.

文本

Wolfram Research (2020)，AudioTrackApply，Wolfram 语言函数，https://reference.wolfram.com/language/ref/AudioTrackApply.html.

CMS

Wolfram 语言. 2020. "AudioTrackApply." Wolfram 语言与系统参考资料中心. Wolfram Research. https://reference.wolfram.com/language/ref/AudioTrackApply.html.

APA

Wolfram 语言. (2020). AudioTrackApply. Wolfram 语言与系统参考资料中心. 追溯自 https://reference.wolfram.com/language/ref/AudioTrackApply.html 年

BibTeX

@misc{reference.wolfram_2026_audiotrackapply, author="Wolfram Research", title="{AudioTrackApply}", year="2020", howpublished="\url{https://reference.wolfram.com/language/ref/AudioTrackApply.html}", note=[Accessed: 12-August-2026]}

BibLaTeX

@online{reference.wolfram_2026_audiotrackapply, organization={Wolfram Research}, title={AudioTrackApply}, year={2020}, url={https://reference.wolfram.com/language/ref/AudioTrackApply.html}, note=[Accessed: 12-August-2026]}