Re: Recording of the running graph

Martin Bayer <[email protected]>
Newsgroups gmane.comp.video.gephex.devel
Message-ID <[email protected]>
Liisa Helle wrote:
> Hi, 
> I would like to record the output of the running graph to the file.
> The input source I use is a video camera, so it is important to record the
> whole video shown in the output window, not only save the graph.  How can
> I do this? I couldn't find any "writing to a file" option in the output
> module.

I committed today a initial version of a yuv4mpeg2 output module to the 
release branch of gephex 0.4.1.

It writes video data to a file. The format of the output file is 
yuv4mpeg2 as defined by the mjpegtools[1] . There are a lot of tools to 
read/convert files of this type. E.g. yuv2lav[1] converts yuv4mpeg2 
files to mjpeg/avi.

The new module is also useful for connecting gephex with other video 
applications. On a unix system you need to create a fifo with:

mkfifo gephex-640x480.y4m

and connect a receiver application to the fifo.

mplayer gephex-640x480.y4m

now add a yuv4mpeg2 module to your effect graph, set the fifoname as 
filename and start rendering.

For the simple cases (no graph changes, no changes of the output 
resolution) the module is already quite useful. But there are some 
problems left and i hope to resolve them until the release.

Martin


[1] http://mjpeg.sourceforge.net

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