diff --git a/doc/ffmpeg.texi b/doc/ffmpeg.texi index 6baf51bf0a..adfc2726ff 100644 --- a/doc/ffmpeg.texi +++ b/doc/ffmpeg.texi @@ -769,6 +769,7 @@ syntax. See the @ref{filter_complex_option,,-filter_complex option} if you want to create filtergraphs with multiple inputs and/or outputs. +@anchor{filter_script option} @item -filter_script[:@var{stream_specifier}] @var{filename} (@emph{output,per-stream}) This option is similar to @option{-filter}, the only difference is that its argument is the name of the file from which a filtergraph description is to be @@ -1978,6 +1979,7 @@ The default is the number of available CPUs. Define a complex filtergraph, i.e. one with arbitrary number of inputs and/or outputs. Equivalent to @option{-filter_complex}. +@anchor{filter_complex_script option} @item -filter_complex_script @var{filename} (@emph{global}) This option is similar to @option{-filter_complex}, the only difference is that its argument is the name of the file from which a complex filtergraph diff --git a/doc/filters.texi b/doc/filters.texi index b397100ff8..1c9d523340 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -282,6 +282,18 @@ previous string will finally result in: -vf "drawtext=text=this is a \\\\\\'string\\\\\\'\\\\: may contain one\\, or more\\, special characters" @end example +In order to avoid cumbersome escaping when using a commandline tool accepting a +filter specification as input, it is advisable to avoid direct inclusion of the +filter or options specification in the shell. + +For example, in case of the @ref{drawtext,,drawtext filter}, you might prefer to +use the @option{textfile} option in place of @option{text} to specify the text +to render. + +When using the @command{ffmpeg} tool, you might consider to use the +@ref{filter_script option,,-filter_script option,ffmpeg} or +@ref{filter_complex_script option,,-filter_complex_script option,ffmpeg}. + @chapter Timeline editing Some filters support a generic @option{enable} option. For the filters @@ -12359,11 +12371,11 @@ braces is a function name, possibly followed by arguments separated by ':'. If the arguments contain special characters or delimiters (':' or '@}'), they should be escaped. -Note that they probably must also be escaped as the value for the -@option{text} option in the filter argument string and as the filter -argument in the filtergraph description, and possibly also for the shell, -that makes up to four levels of escaping; using a text file avoids these -problems. +Note that they probably must also be escaped as the value for the @option{text} +option in the filter argument string and as the filter argument in the +filtergraph description, and possibly also for the shell, that makes up to four +levels of escaping; using a text file with the @option{textfile} option avoids +these problems. The following functions are available: