sox.rar_reverb_sox_sox 源代码_st_i.h_视频处理

SoX(1) SoX(1) NAME sox - Sound eXchange : universal sound sample translator SYNOPSIS sox infile1 [ infile2 ... ] outfile sox [ general options ] [ format options ] infile1 [ [ format options ] infile2 ... ] [ format options ] outfile [ effect [ effect options ] ... ] soxmix infile1 infile2 [ infile3 ... ] outfile soxmix [ general options ] [ format options ] infile1 [ format options ] infile2 [ [ format options ] infile3 ... ] [ format options ] outfile [ effect [ effect options ] ... ] General options: [ -h ] [ -p ] [ -V ] Format options: [ -t filetype ] [ -r rate ] [ -s/-u/-U/-A/-a/-i/-g/-f ] [ -b/-w/-l/-d ] [ -v volume ] [ -c channels ] [ -x ] [ -e ] Effects: avg [ -l | -r | -f | -b | -1 | -2 | -3 | -4 | n,n,...,n ] band [ -n ] center [ width ] bandpass frequency bandwidth bandreject frequency bandwidth chorus gain-in gain out delay decay speed depth -s | -t [ delay decay speed depth -s | -t ] compand attack1,decay1[,attack2,decay2...] in-dB1,out-dB1[,in-dB2,out-dB2...] [ gain [ initial-volume [ delay ] ] ] copy dcshift shift [ limitergain ] deemph earwax echo gain-in gain-out delay decay [ delay decay ... ] echos gain-in gain-out delay decay [ delay decay ... ] fade [ type ] fade-in-length [ stop-time [ fade-out-length ] ] filter [ low ]-[ high ] [ window-len [ beta ]] flanger gain-in gain-out delay decay speed < -s | -t > highp frequency highpass frequency lowp frequency lowpass frequency mask mcompand "attack1,decay1[,attack2,decay2...] in-dB1,out-dB1[,in-dB2,out-dB2...] [ gain [ initial-volume [ delay ] ] ]" xover_freq noiseprof [profile-file] noisered profile-file [threshold] pan direction phaser gain-in gain-out delay decay speed < -s | -t > pick [ -1 | -2 | -3 | -4 | -l | -r | -f | -b ] pitch shift [ width interpole fade ] polyphase [ -w < nut / ham > ] [ -width < long / short / # > ] [ -cutoff # ] rate repeat count resample [ -qs | -q | -ql ] [ rolloff [ beta ] ] reverb gain-out reverb-time delay [ delay ... ] reverse silence above_periods [ duration threshold[ d | % ] [ below_periods duration threshold[ d | % ]] speed [ -c ] factor stat [ -s n ] [ -rms ] [ -v ] [ -d ] stretch [ factor [ window fade shift fading ] swap [ 1 2 | 1 2 3 4 ] synth [ length ] type mix [ freq [ -freq2 ] [ off ] [ ph ] [ p1 ] [ p2 ] [ p3 ] trim start [ length ] vibro speed [ depth ] vol gain [ type [ limitergain ] ] DESCRIPTION SoX is a command line program that can convert most popular audio files to most other popular audio file formats. It can optionally change the audio sample data type and apply one or more sound effects to the file during this translation. If more then one input file is specified then they are concatenated into the output file. In this case, it has a restriction that all input files must be of the same data type and sample rates. soxmix is functionally the same as the command line program sox expect that it takes two or more files as input and mixes the audio together to produce a single file as output. It has a restriction that all input files must be of the same data type and sample rates. There are two types of audio file formats that SoX can work with. The first are self-describing file formats. These contain a header that completely describe the characteristics of the audio data that follows. The second type are header-less data, or sometimes called raw data. A user must pass enough information to SoX on the command line so that it knows what type of data it contains. Audio data can usually be totally described by four characteristics: rate The sample rate is in samples per second. For example, CD sample rates are at 44100. data size The precision the data is stored in. Most popular are 8-bit bytes or 16-bit words. data encoding What encoding the data type uses. Examples are u-law, ADPCM, or signed linear data. channels How many channels are contained in the audio data. Mono and Stereo are the two most common. Please refer to the soxexam(1) manual page for a long description with examples on how to use SoX with various types of file formats. OPTIONS The option syntax is a little grotty, but in essence: sox file.au file.wav translates a sound file in SUN Sparc .AU format into a Microsoft .WAV file, while sox -v 0.5 file.au -r 12000 file.wav mask does the same format translation but also lowers the amplitude by 1/2, changes the sampling rate to 12000 hertz, and applies the mask sound effect to the audio data. The following will mix two sound files together to to produce a single sound file. soxmix music.wav voice.wav mixed.wav Format options: Format options effect the audio samples that they immediately precede. If they are placed before the input file name then they effect the input data. If they are placed before the output file name then they will effect the output data. By taking advantage of this, you can override a input file’s corrupted header or produce an output file that is totally different style then the input file. It is also how SoX is informed about the format of raw input data. -t filetype gives the type of the sound sample file. Useful when file extension is not standard or for specifying the .auto file type. -r rate Gives the sample rate in Hertz of the file. To cause the output file to have a different sample rate than the input file, include this option as a part of the output options. If the input and output files have different rates then a sample rate change effect must be ran. If a sample rate changing effect is not specified then a default one will internally be ran by SoX using its default parameters. -v volume Change amplitude (floating point); less than 1.0 decreases, greater than 1.0 increases. May use a negative number to invert the phase of the audio data. It is interesting to note that we perceive volume logarithmically but this adjusts the amplitude linearly. As with other format options, the volume option effects the file its specified with. This is useful whe processing muti- ple input files as the volume adjustment can be specified for each input file or just once to adjust the output file. This can be compared to an audio mixer were you can control the volume of each input as well as a master volume (output side). soxmix defaults the value of the -v option for each input file to 1/input_file_count. This means if your mixing two input files together then each input file’s volume is adjusted by 0.5. This is done to prevent clipping of audio data during the mixing operation. Users will most likely not be happy with this large of a volume adjustment and can spec- ify the -v option to override this default value. Note: For the non-mixing case, see the stat effect for infor- mation on finding the maximum volume adjustment that can be done with this option without causing audio data to be clipped. -s/-u/-U/-A/-a/-i/-g/-f The sample data encoding is signed linear (2’s complement), unsigned linear, u-law (logarithmic), A-law (logarithmic), ADPCM, IMA_ADPCM, GSM, or Floating-point. U-law (actually shorthand for mu-law) and A-law are the U.S. and international standards fo