音频比特率怎么调,视频音频码率多少合适

很难找到适合设定这个码率的文章呢。 我在谷歌上发现了一点相关的东西。 原文在这里

翻译音频到中文的比特率设置在确定用于音频流的比特率时没有“统一”答案。 选择取决于如何平衡音频质量和带宽。 音质三重流控制台有三个因素决定音频质量。

编码格式(AAC或MP3 )比特率以kbps (千位/秒)为单位进行采样率。 kHz )千赫兹)编码格式通常从AAC获得的音质优于从MP3获得的音质，但更高的比特率和采样率需要训练以实际听到差异。 由于现代监听设备完全采用了交流电源支持，用于实时流媒体的MP3的使用量急剧减少。 我认为没有理由比AAC更喜欢MP3。 因此，除非知道需要支持某些需要MP3的较旧播放器，否则Triton Digital建议使用AAC。

比特率对音乐来说，64(AAC )/96 (MP3 ) kbps是很好的通用设置，对很多听众来说是很好的声音。 这是播客的标准比特率，大多数现代设备(包括智能扬声器和移动设备)的声音都很棒。 如果需要考虑带宽成本，请考虑较低的设置。 为了提高听的效果，请提高音量。

对于呼叫，32(AAC )/64 (MP3 ) kbps是大多数目的的良好标准设置。 如果重视预算，可以将谈话广播设置得较低。 几乎没有人注意到这个差异。

也可以在AAC中使用自适应比特率安装。 请注意，这将根据监听程序的连接质量更改比特率。 有三个自适应比特率选项：扩展、标准和经济，每个选项都提供与连接相关的三个比特率级别。 有关详细信息，请与tritondigitalclientsuccessmanager联系。

采样率类似于比特率。 通常，较高的数值会产生更好的声音。 Triton Digital通常使用44.1kHz立体声作为标准采样率，提供48kHz。

验证重要提示：请流式控制台中设置的采样率是否与源音频的采样率匹配。 失配需要重新采样，即使重新采样率高，音频质量也会下降。 例如，将44.1 kHz重采样为48 kHz比未重采样的44.1 kHz听起来更好。 )如果不知道源音频的采样率，请咨询收音机音频工程师。

请注意，根据比特率/编解码器/信道的组合，可能需要降低采样率。

总结和建议没有“一刀切”的音频质量设置。 使用以下建议作为一般起点。 在大多数情况下，这些设置可以正常工作，但如果您希望使用高质量或低质量，可以根据需要进行相应的更改。

增强型音乐

(古典音乐、优质服务等)标准音乐/混合音乐

(经典流行音乐。 前40名，演讲等(谈话广播

(独家谈话广播。 ) http://www.Sina.com/http://www.Sina.com/96 kbps

(256/128/64 kbps ) 64 kbps

(128/64/32 kbps ) 32 kbps

(56/40/24 kbps )AAC比特率128 kbps的96kbps )如果使用64kbps的（自适应比特率）44.1 kHz立体声，则材料为48 kHz立体声) )在这种情况下，除非材料是48 kHz立体声，否则44.1 kHz立体声。 这种情况下，请使用48。 单声道22.05 kHz

以下矩阵显示了可用编解码器预设的详细视图。 m=单声道和s=立体声)。 如果使用“是”以外的设置，请与tritondigitalclientsuccessmanager联系。

英文原版choosingaudiobitratesettingswhendecidingwhatbitratestouseforaudiostreaming，thereisthereisno“onesizefitsall”answer

audioqualitytherearethreefactorsthatdetermineaudioqualityinthetr

iton Streaming Console:

Encoding format (AAC or MP3)Bitrate in kbps (kilobits per second)Sample rate in kHz (kilohertz) Encoding Format

In general, you get better sound quality from AAC than from MP3, but at the higher bitrates and sample rates it takes a trained ear to really hear the difference. AAC support is fully adopted in contemporary listening devices, so MP3 use for live streaming is in sharp decline. We see no reason to favor MP3 over AAC, so Triton Digital recommends using AAC unless you know you must support some legacy players that require MP3.

Bitrate

For music, 64 (AAC)/96 (MP3) kbps is a good general-purpose setting that will sound good most listeners. This is the standard bitrate for podcasts, and it sounds great on most contemporary devices, including smart speakers and mobile devices. If bandwidth cost is a concern, you might consider using a lower setting. For enhanced listening, go higher.

For talk, 32 (AAC)/64 (MP3) kbps is a good standard setting for most purposes. If you are particularly budget conscious, you can use a lower setting for talk radio and few people will notice the difference.

Note that you have the option of using an adaptive bitrate mount for AAC, which changes the bitrate according to the listener’s connection quality. There are three adaptive bitrate options (Enhanced, Standard, Economy), each of which provides three connection-dependent bitrate levels. For more information, speak with your Triton Digital Client Success Manager.

Sample Rate

Sample rate is similar to bitrate in that the higher numbers generally produce better sound. Triton Digital typically uses 44.1kHz stereo as the standard sample rate, and also offers 48 kHz.

Important: be sure to match the sample rate you set in the Streaming Console with the sample rate of your source audio. A mismatch requires re-sampling and can cause a loss of audio quality, even if the re-sampling is to a higher rate. (E.g., 44.1 kHz re-sampled to 48 kHz does not sound as good as 44.1 kHz that is not re-sampled.) If you are not sure what your source audio sample rate is, ask your station’s audio engineer.

Note that some bitrate/codec/channel combinations might force the sample rate lower.

Summary and Suggestions

There is no “one size fits all” setting for audio quality. Use the suggestions listed below as a general starting point. In most cases, these settings will work perfectly well, but if you prefer to use higher or lower quality according to your needs, you can change them accordingly.

 Enhanced Music
(Classical music, premium service, etc.)Standard Music/Mixed
(General pop music. Top 40, talk, etc.)Talk Radio
(Exclusively talk radio.)AAC Bitrate
(Adaptive Bitrate)96 kbps
(256/128/64 kbps)64 kbps
(128/64/32 kbps)32 kbps
(56/40/24 kbps)MP3 Bitrate128 kbps96 kbps64 kbpsSample Rate44.1 kHz stereo, unless your source material is 48 kHz stereo (in which case, use 48).44.1 kHz stereo, unless your source material is 48 kHz stereo (in which case, use 48).22.05 kHz mono.

The matrix below provides a more detailed view of the available codec presets (m = mono and s = stereo). If you wish to use settings outside of the ones marked “Yes,” speak with your Triton Digital Client Success Manager.

计算机音频文件大小的

也是国外网站：http://www.theaudioarchive.com/TAA_Resources_File_Size.htm ，这个完全可以自己写个Demo实现。

如上图，填好红框中的数据，点“计算”按钮即可计算，如下图，比特率设置为32kbps（静态码率），文件记录时间为10分钟，则产生的文件大小为2.3M