1oggenc(1) Vorbis Tools oggenc(1)
2
6 oggenc - encode audio into the Ogg Vorbis format
7
10 oggenc [ -hrQ ] [ -B raw input sample size ] [ -C raw input number of
11 channels ] [ -R raw input samplerate ] [ -b nominal bitrate ] [ -m min‐
12 imum bitrate ] [ -M maximum bitrate ] [ -q quality ] [ --resample fre‐
13 quency ] [ --downmix ] [ -s serial ] [ -o output_file ] [ -n pattern ]
14 [ -c extra_comment ] [ -a artist ] [ -t title ] [ -l album ] [ -G genre
15 ] input_files ...
16
19 oggenc reads audio data in either raw, WAV, or AIFF format and encodes
20 it into an Ogg Vorbis stream. oggenc may also read audio data from
21 FLAC and Ogg FLAC files depending upon compile-time options. If the
22 input file "-" is specified, audio data is read from stdin and the Vor‐
23 bis stream is written to stdout unless the -o option is used to redi‐
24 rect the output. By default, disk files are output to Ogg Vorbis files
25 of the same name, with the extension changed to ".ogg". This naming
26 convention can be overridden by the -o option (in the case of one file)
27 or the -n option (in the case of several files). Finally, if none of
28 these are available, the output filename will be the input filename
29 with the extension (that part after the final dot) replaced with ogg,
30 so file.wav will become file.ogg
31
34 -h, --help
35 Show command help.
36 -v, --version
38 Show the version number.
39 -r, --raw
41 Assume input data is raw little-endian audio data with no header
42 information. If other options are not specified, defaults to
43 44.1kHz stereo 16 bit. See next three options for how to change
44 this.
45 -B n, --raw-bits=n
47 Sets raw mode input sample size in bits. Default is 16.
48 -C n, --raw-chan=n
50 Sets raw mode input number of channels. Default is 2.
51 -R n, --raw-rate=n
53 Sets raw mode input samplerate. Default is 44100.
54 --raw-endianness n
56 Sets raw mode endianness to big endian (1) or little endian (0).
57 Default is little endian.
58 -Q, --quiet
60 Quiet mode. No messages are displayed.
61 -b n, --bitrate=n
63 Sets target bitrate to n (in kb/s). The encoder will attempt to
64 encode at approximately this bitrate. By default, this remains a
65 VBR encoding. See the --managed option to force a managed
66 bitrate encoding at the selected bitrate.
67 -m n, --min-bitrate=n
69 Sets minimum bitrate to n (in kb/s). Enables bitrate management
70 mode (see --managed).
71 -M n, --max-bitrate=n
73 Sets maximum bitrate to n (in kb/s). Enables bitrate management
74 mode (see --managed).
75 --managed
77 Set bitrate management mode. This turns off the normal VBR
78 encoding, but allows hard or soft bitrate constraints to be
79 enforced by the encoder. This mode is much slower, and may also
80 be lower quality. It is primarily useful for creating files for
81 streaming.
82 -q n, --quality=n
84 Sets encoding quality to n, between -1 (very low) and 10 (very
85 high). This is the default mode of operation, with a default
86 quality level of 3. Fractional quality levels such as 2.5 are
87 permitted. Using this option allows the encoder to select an
88 appropriate bitrate based on your desired quality level.
89 --resample n
91 Resample input to the given sample rate (in Hz) before encoding.
92 Primarily useful for downsampling for lower-bitrate encoding.
93 --downmix
95 Downmix input from stereo to mono (has no effect on non-stereo
96 streams). Useful for lower-bitrate encoding.
97 --advanced-encode-option optionname=value
99 Sets an advanced option. See the Advanced Options section for
100 details.
101 -s, --serial
103 Forces a specific serial number in the output stream. This is
104 primarily useful for testing.
105 --discard-comments
107 Prevents comments in FLAC and Ogg FLAC files from being copied
108 to the output Ogg Vorbis file.
109 -o output_file, --output=output_file
111 Write the Ogg Vorbis stream to output_file (only valid if a sin‐
112 gle input file is specified).
113 -n pattern, --names=pattern
116 Produce filenames as this string, with %g, %a, %l, %n, %t, %d
117 replaced by genre, artist, album, track number, title, and date,
118 respectively (see below for specifying these). Also, %% gives a
119 literal %.
120 -X, --name-remove=s
122 Remove the specified characters from parameters to the -n format
123 string. This is useful to ensure legal filenames are generated.
124 -P, --name-replace=s
126 Replace characters removed by --name-remove with the characters
127 specified. If this string is shorter than the --name-remove
128 list, or is not specified, the extra characters are just
129 removed. The default settings for this option, and the -X option
130 above, are platform specific (and chosen to ensure legal file‐
131 names are generated for each platform).
132 -c comment, --comment comment
135 Add the string comment as an extra comment. This may be used
136 multiple times, and all instances will be added to each of the
137 input files specified. The argument should be in the form
138 "tag=value".
139 -a artist, --artist artist
142 Set the artist comment field in the comments to artist.
143 -G genre, --genre genre
146 Set the genre comment field in the comments to genre.
147 -d date, --date date
150 Sets the date comment field to the given value. This should be
151 the date of recording.
152 -N n, --tracknum n
155 Sets the track number comment field to the given value.
156 -t title, --title title
159 Set the track title comment field to title.
160 -l album, --album album
163 Set the album comment field to album.
164 Note that the -a, -t, and -l options can be given multiple times. They
166 will be applied, one to each file, in the order given. If there are
167 fewer album, title, or artist comments given than there are input
168 files, oggenc will reuse the final one for the remaining files, and
169 issue a warning in the case of repeated titles.
170
173 Oggenc allows you to set a number of advanced encoder options using the
174 --advanced-encode-option option. These are intended for very advanced
175 users only, and should be approached with caution. They may signifi‐
176 cantly degrade audio quality if misused. Not all these options are cur‐
177 rently documented.
178 lowpass_frequency=N
181 Set the lowpass frequency to N kHz.
182 impulse_noisetune=N
185 Set a noise floor bias N (range from -15. to 0.) for impulse
186 blocks. A negative bias instructs the encoder to pay special
187 attention to the crispness of transients in the encoded audio.
188 The tradeoff for better transient response is a higher bitrate.
189 bitrate_hard_max=N
192 Set the allowed bitrate maximum for the encoded file to N bits
193 per second. This bitrate may be exceeded only when there is
194 spare bits in the bit reservoir; if the bit reservoir is
195 exhausted, frames will be held under this value. This setting
196 must be used with --managed to have any effect.
197 bitrate_hard_min=N
200 Set the allowed bitrate minimum for the encoded file to N bits
201 per second. This bitrate may be underrun only when the bit
202 reservoir is not full; if the bit reservoir is full, frames will
203 be held over this value; if it impossible to add bits construc‐
204 tively, the frame will be padded with zeroes. This setting must
205 be used with --managed to have any effect.
206 bit_reservoir_bits=N
209 Set the total size of the bit reservoir to N bits; the default
210 size of the reservoir is equal to the nominal number of bits
211 coded in one second (eg, a nominal 128kbps file will have a bit
212 reservoir of 128000 bits by default). This option must be used
213 with --managed to have any effect and affects only minimum and
214 maximum bitrate management. Average bitrate encoding with no
215 hard bitrate boundaries does not use a bit reservoir.
216 bit_reservoir_bias=N
219 Set the behavior bias of the bit reservoir (range: 0. to 1.).
220 When set closer to 0, the bitrate manager attempts to hoard bits
221 for future use in sudden bitrate increases (biasing toward bet‐
222 ter transient reproduction). When set closer to 1, the bitrate
223 manager neglects transients in favor using bits for homogenous
224 passages. In the middle, the manager uses a balanced approach.
225 The default setting is .2, thus biasing slightly toward tran‐
226 sient reproduction.
227 bitrate_average=N
230 Set the average bitrate for the file to N bits per second. When
231 used without hard minimum or maximum limits, this option selects
232 reservoirless Average Bit Rate encoding, where the encoder
233 attempts to perfectly track a desired bitrate, but imposes no
234 strict momentary fluctuation limits. When used along with a
235 minimum or maximum limit, the average bitrate still sets the
236 average overall bitrate of the file, but will work within the
237 bounds set by the bit reservoir. When the min, max and average
238 bitrates are identical, oggenc produces Constant Bit Rate Vorbis
239 data.
240 bitrate_average_damping=N
243 Set the reaction time for the average bitrate tracker to N sec‐
244 onds. This number represents the fastest reaction the bitrate
245 tracker is allowed to make to hold the bitrate to the selected
246 average. The faster the reaction time, the less momentary fluc‐
247 tuation in the bitrate but (generally) the lower quality the
248 audio output. The slower the reaction time, the larger the ABR
249 fluctuations, but (generally) the better the audio. When used
250 along with min or max bitrate limits, this option directly
251 affects how deep and how quickly the encoder will dip into its
252 bit reservoir; the higher the number, the more demand on the bit
253 reservoir.
254 The setting must be greater than zero and the useful range is
256 approximately .05 to 10. The default is .75 seconds.
257
260 Simplest version. Produces output as somefile.ogg:
261 oggenc somefile.wav
262 Specifying an output filename:
264 oggenc somefile.wav -o out.ogg
265 Specifying a high-quality encoding averaging 256 kbps (but still VBR).
267 oggenc infile.wav -b 256 out.ogg
268 Specifying a maximum and average bitrate, and enforcing these.
270 oggenc infile.wav --managed -b 128 -M 160 out.ogg
271 Specifying quality rather than bitrate (to a very high quality mode)
273 oggenc infile.wav -q 6 out.ogg
274 Downsampling and downmixing to 11 kHz mono before encoding.
276 oggenc --resample 11025 --downmix infile.wav -q 1 out.ogg
277 Adding some info about the track:
279 oggenc somefile.wav -t "The track title" -a "artist who per‐
280 formed this" -l "name of album" -c "OTHERFIELD=contents of some
281 other field not explicitly supported"
282 This encodes the three files, each with the same artist/album tag, but
284 with different title tags on each one. The string given as an argument
285 to -n is used to generate filenames, as shown in the section above.
286 This example gives filenames like "The Tea Party - Touch.ogg":
287 oggenc -b 192 -a "The Tea Party" -l "Triptych" -t "Touch"
288 track01.wav -t "Underground" track02.wav -t "Great Big Lie"
289 track03.wav -n "%a - %t.ogg"
290 Encoding from stdin, to stdout (you can also use the various tagging
292 options, like -t, -a, -l, etc.):
293 oggenc -
294
296 Program Author:
297 Michael Smith <msmith@xiph.org>
298 Manpage Author:
301 Stan Seibert <indigo@aztec.asu.edu>
302
305 Reading type 3 wav files (floating point samples) probably doesn't work
306 other than on intel (or other 32 bit, little endian machines).
307
310 vorbiscomment(1), ogg123(1), flac(1), speexenc(1), ffmpeg2theora(1)
311Xiph.Org Foundation 2005 March 3 oggenc(1)