Date: Wed, 11 Jul 2001 23:16:46 -0400 From: Randall Hopper <aa8vb@nc.rr.com> To: Heiko Recktenwald <uzs106@ibm.rhrz.uni-bonn.de> Cc: multimedia@FreeBSD.ORG Subject: Re: fxtv and realproducer Message-ID: <20010711231646.A1894@nc.rr.com> In-Reply-To: <Pine.BSF.4.21.0107082249090.809-100000@moritz.alleswirdgelber>; from uzs106@ibm.rhrz.uni-bonn.de on Sun, Jul 08, 2001 at 10:54:49PM %2B0200 References: <Pine.BSF.4.21.0107082249090.809-100000@moritz.alleswirdgelber>
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Heiko Recktenwald:
|is it possible to run realproducer with fxtv ? It seems that mpeg_encode
|supports the images as standardinput from fxtv, is this somewhere
|documented, btw ?
No, it's sort-of internal right now. But if you want to play with it,
here's how. The format fxtv writes on-the-fly and then reads back in
during encoding is a fxtv-specific file format with interleaved raw audio
and video.
However, as you said fxtv is converting the images into another stream
format (PPM or IYUV images back-to-back) which can be handed off to
mpeg_encode. It is also extracting the audio bits into an AIFF which is
piped into the MPEG2/3 audio encoder of choice. It does this with a child
invocation of fxtv with special options to decode this file (I had in mind
exporting this later so others could play with other encoders, but never
got back to cleaning it up).
See the GenAVRawExtractPipe() in the usr/X11R6/lib/X11/fxtv/fxtv_cnvt.sh
file for the command. But basically:
fxtv -batch streamavcap \
-streaminput <raw-capture-path> \ <- Input raw capture
-frameformat [TIFF|PPM|YUV] \
-videotarget [<img-path-base>%s | -] \ <- Out img base or stdout
[ -streamfps <fps> ] \
[ -audiotarget <raw-audio-path> ] <- Out raw audio
So use "Save Video As..." in fxtv to capture to raw, then run the above
command and you can do what you want with the frames. In fxtv_cnvt.sh, the
above command is piped into mpeg_encode to do the MPEG video encode whilst
the audio snippets are filtered out into a raw file for subsequent MPEG 2/3
audio encoding. Notes: the YUV frame format is only valid if you captured
to IYUV. TIFF/PPM are valid for RGB captures.
Hope you have some fun with this. Feel free to replay or mail me with any
questions.
Randall
--
Randall Hopper
aa8vb@nc.rr.com
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