[FFmpeg-user] Drawtext filter

Sebastian Arcus shop at open-t.co.uk
Sun Mar 27 15:27:22 CEST 2011

On 03/27/2011 09:23 AM, Stefano Sabatini wrote:
> On date Saturday 2011-03-26 22:35:20 +0000, Sebastian Arcus encoded:
>> Thanks Stefano. Any idea if the problem with the background colour
>> option not having any effect has been solved? I tried it a while ago
>> (about October-November 2010) - and the option to set a background
>> colour for the text was not working at the time.
> Try it and report in case of problem.

Another problem seems to be that there is no distinction between 
required and optional arguments for the drawtext filter:

1. If I use the just the "text" argument, there is an error complaining 
about not having used a "fontfile" argument.
2. If I use "text" and "fontfile", there is no error, but the text 
doesn't show.
3. If I use "text" and "fontfile" and "x" and "y" arguments, still no 
error and still no snow.
4. If I use "text", "fontfile", "x", "y", "fontcolor" - finally the text 
shows in the video - although I haven't used "fontsize".

It would be useful if there is a full error for any compulsory argument 
missing from the command line - for the drawtext filter, that is.

Also - the text shows upside down in the video - I have no idea why.

Should I report the above to the main bug database for ffmpeg, or bugs 
for filters go somewhere else?


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