<B><TT>flac</TT></B> assumes that files ending in ".wav" or that have the RIFF WAVE header present are WAVE files; this may be overridden with a command-line option; it also assumes that files ending in ".ogg" are Ogg-FLAC files. Other than this, <B><TT>flac</TT></B> makes no assumptions about file extensions, though the convention is that FLAC files have the extension ".flac" (or ".fla" on ancient file systems like FAT-16).
</P>
<P>
- Before going into the full command-line description, a few other things help to sort it out: 1) <B><TT>flac</TT></B> encodes by default, so you must use <B>-d</B> to decode; 2) the options <B><TT>-0</TT></B> .. <B><TT>-8</TT></B> that control the compression level actually are just synonyms for different groups of specific encoding options (described later) and you can get the same effect by using the same options; 3) <B><TT>flac</TT></B> behaves similarly to gzip in the way it handles input and output files.
+ Before going into the full command-line description, a few other things help to sort it out: 1) <B><TT>flac</TT></B> encodes by default, so you must use <B>-d</B> to decode; 2) the options <B><TT>-0</TT></B> .. <B><TT>-8</TT></B> (or <B><TT>--fast</B></TT> and <B><TT>--best</B></TT>) that control the compression level actually are just synonyms for different groups of specific encoding options (described later) and you can get the same effect by using the same options; 3) <B><TT>flac</TT></B> behaves similarly to gzip in the way it handles input and output files.
</P>
<P>
<B><TT>flac</TT></B> will be invoked one of four ways, depending on whether you are encoding, decoding, testing, or analyzing:
</TR>
<TR>
<TD NOWRAP ALIGN="RIGHT" VALIGN="TOP" BGCOLOR="#F4F4CC">
+ <TT>--fast</TT>
+ </TD>
+ <TD>
+ Fastest compression. Currently synonymous with <TT>-0</TT>
+ </TD>
+ </TR>
+ <TR>
+ <TD NOWRAP ALIGN="RIGHT" VALIGN="TOP" BGCOLOR="#F4F4CC">
+ <TT>--best</TT>
+ </TD>
+ <TD>
+ Highest compression. Currently synonymous with <TT>-8</TT>
+ </TD>
+ </TR>
+ <TR>
+ <TD NOWRAP ALIGN="RIGHT" VALIGN="TOP" BGCOLOR="#F4F4CC">
<TT>-e</TT>
</TD>
<TD>
</varlistentry>
<varlistentry>
+ <term><option>--fast</option></term>
+
+ <listitem>
+ <para>Fastest compression. Currently
+ synonymous with -0.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
+ <term><option>--best</option></term>
+
+ <listitem>
+ <para>Highest compression. Currently
+ synonymous with -8.</para>
+ </listitem>
+ </varlistentry>
+
+ <varlistentry>
<term><option>-e</option></term>
<listitem>
aopts.do_residual_text = true;
else if(0 == strcmp(argv[i], "--a-rtext-"))
aopts.do_residual_text = false;
- else if(0 == strcmp(argv[i], "-0")) {
+ else if(0 == strcmp(argv[i], "-0") || 0 == strcmp(argv[i], "--fast")) {
do_exhaustive_model_search = false;
do_escape_coding = false;
do_mid_side = false;
rice_parameter_search_dist = 0;
max_lpc_order = 8;
}
- else if(0 == strcmp(argv[i], "-8")) {
+ else if(0 == strcmp(argv[i], "-8") || 0 == strcmp(argv[i], "--best")) {
do_exhaustive_model_search = true;
do_escape_coding = false;
do_mid_side = true;
fprintf(out, " -6 : synonymous with -l 8 -b 4608 -m -r 4\n");
fprintf(out, " -7 : synonymous with -l 8 -b 4608 -m -e -r 6\n");
fprintf(out, " -8 : synonymous with -l 12 -b 4608 -m -e -r 6\n");
+ fprintf(out, " --fast, --best : synonymous with -0 and -8 respectively\n");
fprintf(out, " -e : do exhaustive model search (expensive!)\n");
fprintf(out, " -E : include escape coding in the entropy coder\n");
fprintf(out, " -l # : specify max LPC order; 0 => use only fixed predictors\n");