[{"data":1,"prerenderedAt":725},["ShallowReactive",2],{"guide-volume-adjust-guide":3,"faq-volume-adjust-guide":4,"related-volume-adjust-guide":192},null,{"id":5,"title":6,"body":7,"category":171,"description":172,"extension":173,"keywords":174,"meta":180,"navigation":181,"path":182,"relatedTools":183,"seo":187,"stem":188,"type":189,"updatedAt":190,"__hash__":191},"faq\u002Fhelp\u002Ffaq\u002Fvolume-adjust-guide.md","如何在线调节视频和音频的音量大小？放大缩小方法",{"type":8,"value":9,"toc":160},"minimark",[10,14,18,21,28,38,44,48,86,89,95,101,107,113,116,119,130,133,136],[11,12,13],"p",{},"打开91AI工具网的音量调节工具，上传视频或音频文件，设置0.1~5.0倍的增益倍数，点击开始处理即可在线调整音量大小。无需注册，服务端FFmpeg高效处理，保持原始格式输出。",[15,16,17],"h2",{"id":17},"详细解答",[11,19,20],{},"音量调节（音频增益调整）是指对视频或音频文件的整体音量进行放大或减小。增益值1.0表示保持原音量，大于1.0为放大，小于1.0为减小。",[11,22,23,27],{},[24,25,26],"strong",{},"支持的输入格式","：",[29,30,31,35],"ul",{},[32,33,34],"li",{},"视频：MP4、AVI、MKV、MOV、WMV、FLV、WebM、MPEG、TS等",[32,36,37],{},"音频：MP3、WAV、FLAC、OGG、M4A、AAC、WMA等",[11,39,40,43],{},[24,41,42],{},"输出格式","：与输入格式保持一致，不需要额外指定。",[45,46,47],"h3",{"id":47},"选择增益倍数",[29,49,50,56,62,68,74,80],{},[32,51,52,55],{},[24,53,54],{},"0.1~0.5","：大幅降低音量，适合背景音乐过高的情况",[32,57,58,61],{},[24,59,60],{},"0.5~0.9","：适当降低音量，微调",[32,63,64,67],{},[24,65,66],{},"1.0","：保持原始音量",[32,69,70,73],{},[24,71,72],{},"1.0~2.0","：适当放大，适合大多数音量偏低场景",[32,75,76,79],{},[24,77,78],{},"2.0~3.0","：明显放大，适合录制音量严重不足的文件",[32,81,82,85],{},[24,83,84],{},"3.0~5.0","：大幅放大，可能出现失真",[45,87,88],{"id":88},"典型应用场景",[11,90,91,94],{},[24,92,93],{},"视频会议回放","：在线会议录制的视频音量通常偏低，提升1.5~2.0倍后听取更清晰。",[11,96,97,100],{},[24,98,99],{},"影视内容优化","：不同平台下载的视频音量标准不同，统一调整到合适的音量水平，避免切换时频繁调节播放器音量。",[11,102,103,106],{},[24,104,105],{},"录音资料增强","：手机录音或老旧录音带数字化后的音频文件音量往往很低，适当增益使其可听。",[11,108,109,112],{},[24,110,111],{},"自媒体创作","：制作视频时，从不同来源获取的素材音量不一致，先用音量调节工具统一电平再进行剪辑。",[15,114,115],{"id":115},"注意事项",[11,117,118],{},"过度增益（3.0倍以上）可能导致：",[29,120,121,124,127],{},[32,122,123],{},"音频削波失真",[32,125,126],{},"背景底噪被明显放大",[32,128,129],{},"出现爆音和杂音",[11,131,132],{},"建议从较低的增益倍数开始尝试，逐步调整到满意效果。如果原始文件底噪较大，建议先使用其他工具降噪处理再进行音量调节。",[15,134,135],{"id":135},"相关推荐",[29,137,138,146,153],{},[32,139,140,145],{},[141,142,144],"a",{"href":143},"\u002Ftools\u002Fvolume-adjust","音量调节工具"," - 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在线压缩MP4、AVI等视频文件",[32,376,377,380],{},[141,378,379],{"href":271},"视频转音频"," - 从视频中提取音频",[32,382,383,385],{},[141,384,151],{"href":150}," - MP3、WAV、FLAC等互转",[32,387,388,391],{},[141,389,390],{"href":250},"视频格式转换"," - 视频格式互转",[45,393,394],{"id":394},"图片处理工具",[29,396,397,402],{},[32,398,399,401],{},[141,400,299],{"href":298}," - JPG\u002FPNG\u002FWebP压缩",[32,403,404,406],{},[141,405,303],{"href":302}," - 图片格式互转",[45,408,410],{"id":409},"cad及office工具","CAD及Office工具",[29,412,413,420,427,434],{},[32,414,415,419],{},[141,416,418],{"href":417},"\u002Ftools\u002Fcad-version-convert","CAD版本转换"," - DWG\u002FDXF版本互转",[32,421,422,426],{},[141,423,425],{"href":424},"\u002Ftools\u002Fcad-to-pdf","CAD转PDF"," - CAD图纸转PDF",[32,428,429,433],{},[141,430,432],{"href":431},"\u002Ftools\u002Fdwg-to-dxf","DWG转DXF"," - AutoCAD格式转换",[32,435,436,440],{},[141,437,439],{"href":438},"\u002Ftools\u002Fword_compress","Word\u002FExcel\u002FPPT压缩"," - 给Office文档瘦身",[15,442,443],{"id":443},"平台优势",[11,445,446],{},"根据市场调研机构G2 2025年报告，在线工具用户最关注的三个因素是：隐私安全（87%）、免费使用（76%）和无需安装（71%）。91AI工具在这三方面均表现出色：",[29,448,449,455,461,467,473],{},[32,450,451,454],{},[24,452,453],{},"纯前端隐私保护","：音视频\u002F图片工具在浏览器本地处理，不上传服务器，文件安全零泄露",[32,456,457,460],{},[24,458,459],{},"零成本无限用","：纯前端工具无任何使用限制，不限文件大小，完全免费",[32,462,463,466],{},[24,464,465],{},"PDF专业转换","：免费体验3次，登录后可继续使用，满足日常办公需求",[32,468,469,472],{},[24,470,471],{},"在线即点即用","：打开浏览器即可使用，支持Windows、Mac、Linux，无需下载安装",[32,474,475,478],{},[24,476,477],{},"无需注册","：上传文件直接处理，注册登录可获取更多使用次数",[11,480,481,484],{},[24,482,483],{},"来源","：G2 Best Software 2025年度报告、Statista在线工具用户行为调查",[15,486,487],{"id":487},"适用人群",[29,489,490,496,502,508],{},[32,491,492,495],{},[24,493,494],{},"职场办公族","：需要频繁处理PDF、Office文档",[32,497,498,501],{},[24,499,500],{},"设计师","：需要压缩和转换图片格式",[32,503,504,507],{},[24,505,506],{},"学生群体","：整理课件、转换文档格式",[32,509,510,513],{},[24,511,512],{},"普通用户","：需要处理音视频或文件格式转换",[515,516,517],"blockquote",{},[11,518,519,520,523],{},"试试我们的",[141,521,522],{"href":157},"纯前端视频压缩工具"," — 不上传服务器，不限文件大小，完全免费",{"title":161,"searchDepth":162,"depth":162,"links":525},[526,533,534],{"id":203,"depth":162,"text":203,"children":527},[528,529,530,531,532],{"id":206,"depth":167,"text":207},{"id":309,"depth":167,"text":310},{"id":363,"depth":167,"text":364},{"id":394,"depth":167,"text":394},{"id":409,"depth":167,"text":410},{"id":443,"depth":162,"text":443},{"id":487,"depth":162,"text":487},"91AI工具提供纯前端音视频\u002F图片处理（免费无限用）和PDF\u002F文档在线转换（免费体验）等50+种工具，无需安装即点即用。",[537,538,539,540,541],"91AI工具","在线转换","PDF处理","纯前端工具","免费在线工具",{},"\u002Fhelp\u002Ffaq\u002F91aitool-introduction",[186,185,545,546],"pdf-to-word","img-compress",{"title":195,"description":535},"help\u002Ffaq\u002F91aitool-introduction","2026-05-06","Dr6ei_okkl0tz4LnR1ZOi50ReKpUQOffM0kc2pCe8Ek",{"id":552,"title":553,"body":554,"category":171,"description":626,"extension":173,"keywords":627,"meta":633,"navigation":181,"path":634,"relatedTools":635,"seo":637,"stem":638,"type":189,"updatedAt":639,"__hash__":640},"faq\u002Fhelp\u002Ffaq\u002Faudio-compress-guide.md","如何在线压缩音频文件大小？",{"type":8,"value":555,"toc":620},[556,559,561,564,567,570,573,579,585,591,597,599,602,604],[11,557,558],{},"打开91AI工具网的音频压缩工具，上传音频文件，选择压缩强度（低\u002F中\u002F高）和输出格式（MP3或WAV），点击压缩即可。系统会自动处理，输出体积更小的音频文件。",[15,560,17],{"id":17},[11,562,563],{},"音频压缩的核心是降低比特率和采用更高效的编码格式。通过降低音频比特率（如从320kbps降到128kbps）、转换声道（立体声转为单声道）和降低采样率（从48000Hz降到22050Hz）来减小文件体积。",[11,565,566],{},"工具提供三级压缩强度：低压缩（约80%原始大小，高音质），中压缩（约50%原始大小，适中音质），高压缩（约25%原始大小，适合语音）。对于音乐文件，中压缩模式可以在音质和大小之间取得良好平衡。",[11,568,569],{},"压缩过程中采用智能编码策略，优先保留人声频段的信息，对不敏感的高频部分适当减少比特分配，使听觉体验的损失最小化。",[15,571,572],{"id":572},"使用场景",[11,574,575,578],{},[24,576,577],{},"邮件发送","：邮箱附件通常限制25MB，大音频文件压缩后可正常发送。录音笔导出的WAV文件经常超过限制，压缩为MP3后可轻松发送。",[11,580,581,584],{},[24,582,583],{},"聊天分享","：微信等即时通讯工具对文件大小有限制，压缩音频文件后可直接分享。长篇语音消息导出后压缩，方便转发。",[11,586,587,590],{},[24,588,589],{},"存储节省","：播客爱好者大量音频存档时，压缩可节省数GB存储空间。将手机录音压缩备份到云盘，减少存储费用。",[11,592,593,596],{},[24,594,595],{},"网站上传","：网页上传音频素材有大小限制时，先压缩再上传可以顺利通过。个人网站音乐文件的压缩可提高页面加载速度。",[15,598,115],{"id":115},[11,600,601],{},"音频压缩是有损过程，过高压缩会导致明显音质劣化（金属声、声音模糊等）。语音内容可以接受更高压缩比，音乐内容建议使用低或中压缩。建议压缩前备份原始高质量文件，以便未来需要时恢复使用。",[15,603,135],{"id":135},[29,605,606,612,616],{},[32,607,608,611],{},[141,609,610],{"href":264},"音频压缩工具"," - 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