[gst-devel] textoverlay and dynamic text - to subtitle or not and if so how?

[Andoni Morales]

2010/11/9 HaroldJRoth <dlafferty at gmail.com>:
>
>
> Andoni Morales wrote:
>>
>> 2010/11/9 HaroldJRoth <dlafferty at gmail.com>:
>>>
>>> Can textoverlay be used to apply dynamically generated text to a frame?
>>>
>>
>> ...
>>
>> You could also use the 'textrender' element, which support plain text
>> and pango markup.
>>
>> andoni
>>
>>
>
> Two issues:  'textrender' doesn't mux text to another video stream.  Second,
> 'textrender' doesn't allow me to sync my text to frame TIMESTAMP data.  I
> think textrender on its own is more appropriate for generating text only
> frames from a textparse element.
Textrender, which outputs an image with an alpha channel, is usually
used in combination with videomixer, which mixes your video stream
with the text image and sync them, so it's exactly what you are
looking for. IIRC playbin2 uses it to render the subtitles.

Andoni
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-- 
Andoni Morales Alastruey

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