calculatorw的专栏

最新版ffmpeg音视频编码包，能把采集的音频视频合并成一种流格式，从而实现音视频的同步。

最新音视频编解码库，该工具能完成各种音视频格式之间的相互转换

************************************************************* * * * Nero AAC Encoder * * Copyright 2009 Nero AG * * All Rights Reserved Worldwide * * * * Package build date: Dec 17 2009 * * Package version: 1.5.1.0 * * * * See -help for a complete list of available parameters. * * * ************************************************************* Usage: neroAacEnc [options] -if &lt;input-file&gt; -of <output-file> Where: &lt;input-file&gt; : Path to source file to encode. The file must be in Microsoft WAV format and contain PCM data. Specify - to encode from stdin. <output-file> : Path to output file to encode to, in MP4 format. ==== Available options: ==== Quality/bitrate control: -q <number> : Enables "target quality" mode. <number> is a floating-point number in 0...1 range. -br <number> : Specifies "target bitrate" mode. <number> is target bitrate in bits per second. -cbr <number> : Specifies "target bitrate (streaming)" mode. <number> is target bitrate in bits per second. When neither of above quality/bitrate options is used, the encoder defaults to equivalent of -q 0.5 Multipass encoding: -2pass : Enables two-pass encoding mode. Note that two-pass more requires a physical file as input, rather than stdin. -2passperiod : Overrides two-pass encoding bitrate averaging period, <number> : in milliseconds. : Specify zero to use least restrictive value possible (default). Advanced features / troubleshooting: -lc : Forces use of LC AAC profile &#40;HE features disabled&#41; -he : Forces use of HE AAC profile &#40;HEv2 features disabled&#41; -hev2 : Forces use of HEv2 AAC profile Note that the above switches (-lc, -he, -hev2) should not be used; optimal AAC profile is automatically determined from quality/bitrate settings when no override is specified. -ignorelength : Ignores length signaled by WAV headers of input file. Useful for certain frontends using stdin.