On Sunday 12 January 2003 02:47 pm, Jason Wood wrote:
> On Sunday 12 Jan 2003 12:04 pm, Rolf Dubitzky wrote:
> All of the 25fps references have now vanished, and instead they ask the
> document via framesPerSecond() to get the correct framerate. However, this
> value is hardcoded to PAL (25 fps) at the moment, it is a bit of work to
> fix this properly, because I need to be able to tell piave what framerate
> to render to.
Well, mixed projects are not an option for the near future.
> Exactly how piave handles the conversion of NTSC to PAL and PAL to NTSC is
> out of kdenlive's hands.
Having pure PAL _or_ NTSC projects maybe not too difficult. conversion will
take while.
> However, if we want to prevent this from happening
> (i.e. tell kdenlive not to allow clips of different frame rates) we need to
> choose a paramter to the <getCapabillities/> call in the <general> area I
> hinted at when we were talking about transitions. It would say something
> like :
>
> <capabilities>
> <general>
> <fps canconvert="false"/>
> </general>
> </capabilities>
>
> Or to put it another way, handling NTSC, whilst it should not be difficult,
> is quite a bit of work, which overlaps with the "file format support" quite
> a lot.
Yes, you are right. But let's try to make un-mixed projects work. I think that
is possible, don't you? Actually it will take me a while to implement it
propperly, because NTSC has an aspect ratio different from a typical screen.
with PAL I don't have to worry about that, but NTSC must be scaled to look
right on a computer screen. For YUV_overlay that's easy, but.. well, let's
see...
I'll commit a patch in a minute that will send for NTSC something like:
<reply command="getFileProperties"
status="ok"
filename="/kino_samples/pond.dv"
duration="36.600000">
<container format="none"/>
<video format="DV"
system="NTSC"
fps="30.000000"
width="720"
heigth="480"
/>
<audio format="PCL"
frequency="44100"
num_channels="2"
quantization="16"
emphasis="off"
sampling="1"
/>
</reply>
and for a PAL clip:
<reply command="getFileProperties"
status="ok"
filename="/samples/4x3-PAL.dv"
duration="2.000000">
<container format="none"/>
<video format="DV"
system="PAL"
fps="25.000000"
width="720"
heigth="576"
/>
<audio format="PCL"
frequency="32000"
num_channels="2"
quantization="12"
emphasis="off"
sampling="2"
/>
</reply>
Cheers,
Rolf
***************************************************************
Rolf Dubitzky
e-mail: Rolf.Dubitzky at Physik.TU-Dresden.de
s-mail see http://hep.phy.tu-dresden.de/~dubitzky/
***************************************************************
