[FFmpeg-user] multiple drawtext parameters
stefano.sabatini-lala at poste.it
Sat May 28 00:23:14 CEST 2011
On date Friday 2011-05-27 06:14:20 -0700, mromey encoded:
> Want to use ffmpeg to publish quickTimes and thumbnails for our asset
> management system. Evaluating how viable ffmpeg would be as a replacement
> to our current system. In the past I have done it lots of different ways.
> I have used After Effects, Nuke, RVIO, python and pil. Thus far I am
> impressed with ffmpeg but having some difficulty with some parameters.
> Exploring the drawtext filter. I have the following example.
> ffmpeg.exe -i C:/temp/input.mov -vf drawtext="arial.ttf=':text='TEST'"
> Have a few questions:
> 1. Is it possible to process multiple drawtext in the same IO stream. I
> would rather load the movie or image sequence once into memory once then
> apply each drawtext overlay rather than process the addition of each
> drawtext and load the file each time. If this is possible can somebody help
> by showing me the syntax.
You can put different drawtext filter in sequence:
> 2. One of the drawtext burn ins needs to be a frame counter. Is it
> possible to send some type of internal variable/flag to the value of text
> that would use the frame number in lieu of static text?
It is possible but we have yet to find a syntax for doing it in an
> 3. Was hoping to get some direction as to how I would take a single frame
> slate file and append it to a quicktime via ffmpeg.
That would be a concatenation filter, yet to be
implemented/integrated, patches are welcome, in alternative file a
feature requests (and sponsorships are welcome as well).
> Thanks for the help in advanced.
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