[FFmpeg-soc] libavfilter audio work - qualification task

[Michael Niedermayer]

On Fri, Apr 09, 2010 at 06:07:00PM -0700, S.N. Hemanth Meenakshisundaram wrote:
> On 04/09/2010 04:18 PM, Stefano Sabatini wrote:
>> On date Friday 2010-04-09 08:02:50 -0700, S.N. Hemanth Meenakshisundaram 
>> encoded:
>>    
>>> On 04/08/2010 09:54 PM, S.N. Hemanth Meenakshisundaram wrote:
> [...]
>>> Index: vf_drawtext.c
>>> ===================================================================
>>> --- vf_drawtext.c	(revision 0)
>>> +++ vf_drawtext.c	(revision 0)
>>> @@ -0,0 +1,589 @@
>>> +/*
>>> + * vf_drawtext.c: print text over the screen
>>> + 
>>> ******************************************************************************
>>> + * Options:
>>> + * -f<filename>     font filename (MANDATORY!!!)
>>> + * -s<pixel_size>   font size in pixels [default 16]
>>> + * -b               print background
>>> + * -o               outline glyphs (use the bg color)
>>> + * -x<pos>          x position (>= 0) [default 0]
>>> + * -y<pos>          y position (>= 0) [default 0]
>>> + * -t<text>         text to print (will be passed to strftime())
>>> + *                  MANDATORY: will be used even when -T is used.
>>> + *                  in this case, -t will be used if some error
>>> + *                  occurs
>>> + * -T<filename>     file with the text (re-read every frame)
>>> + * -c<#RRGGBB>      foreground color ('internet' way) [default #ffffff]
>>> + * -C<#RRGGBB>      background color ('internet' way) [default #000000]
>>> + *
>>> + 
>>> ******************************************************************************
>>> + * Features:
>>> + * - True Type, Type1 and others via FreeType2 library
>>> + * - Font kerning (better output)
>>> + * - Line Wrap (if the text doesn't fit, the next char go to the next 
>>> line)
>>> + * - Background box
>>> + * - Outline
>>> + 
>>> ******************************************************************************
>>>      
>> User-documentation for filters should be put in doc/libavfilter.texi,
>> also I don't like this syntax, possibly we should try hard at giving a
>> consistent interface to the user, so we should either use
>> PARAM-1:PARAM-2:...:PARAM-N either use libavutil/parseutils.c (which
>> still depends on opt.c so I don't believe Michail won't accept this to
>> be included in the main repo, but that's not a problem for now).
>>    
> Am sorry for the confusion here. The syntax above is from the old vhook 
> drawtext file, the current syntax coded is :
>
> ffplay -vfilters 
> drawtext=f:<font_name>:t:<text>:T:<file_name>:s:<font_size>:x:<x_position>:y:<y_position>:c:<font_color>:C:<bg_color>:b:o 
> video.avi

i think drawtext=f=<font_name>:t=<text>:T=<file_name...
would be less error prone

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

When the tyrant has disposed of foreign enemies by conquest or treaty, and
there is nothing more to fear from them, then he is always stirring up
some war or other, in order that the people may require a leader. -- Plato
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