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Thread: : (big)video in SMIL




: (big)video in SMIL
user name
2007-04-02 11:09:19
Dear all,

I'm running Ambulant 1.8 on Windows XP SP2. If I put a video
element like:

<video fit="meet" dur="indefinite"
src="VTS_01_1.vob.WMV"
region="main_video" id="the_video"/>

The video gets correctly played.. but for "bigger"
videos (>20 Mb which is
actually rather small for a video!) the rendering is very
bad: I have tried
various codecs: mpeg2, mp4, DivX and WMV... but all seem to
skip a lot both
the audio and the video: basically the video plays as if it
were in a kind
of "step-mode". 
Any hint... is this a known problem....?

Thanks
Lorenzo


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Re: : (big)video in SMIL
country flaguser name
Netherlands
2007-04-03 15:56:49
Hello Lorenzo,

We've looked into this a bit, and yes: for some reason on
Windows, large 
videos cause a problem. (I tested it this evening with a
300mb WMV 
file.) Our problem is that we simply hand the video off to
the Direct * 
infrastructure on WinXP, which should take care of fetching,
decoding 
and displaying the video -- this is a requirement for us,
because we 
can't decode their formats).

Could you submit a bug report on this via the sourceforge
site -- this 
will help make sure that nobody forgets what we need to do
here.

thx
-d.

Here is the test file, which is set so that no video scaling
needs to 
take place:
<?xml version="1.0"?>
<!DOCTYPE smil PUBLIC "-//W3C//DTD SMIL
2.0//EN"
                       "ht
tp://www.w3.org/2001/SMIL20/SMIL20.dtd">
<smil xmlns="http
://www.w3.org/2001/SMIL20/Language">
   <head>
     <layout>
       <root-layout id="Advanced_PPC_Slideshow"
backgroundColor="black" 
width="1000" height="1000"/>
       <region id="Images"
width="100%" height="100%"
z-index="1" />
     </layout>
   </head>
   <body>
     <video src="van_dam.wmv"
region="images" />
   </body>
</smil>
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