Thanks to Steven Schultz, for his former advise. My myriad of photographs can 
now be made into a VCD and posted home. 

Running into a bit of a problem merging y4m files together. 

For some reason I can only merge two using the 'Schultz Method' of CATing the 
y4m files. 

Here is my basic schema:

lav2yuv +n file_1.avi | yuvfps -v 0 -r 25:1 | yuvscaler -v O -O SVCD   >  
file_1.y4m
lav2yuv +n file_2.avi | yuvfps -v 0 -r 25:1 | yuvscaler -v O -O SVCD   > 
file_2.y4m
* note the YUV4MPEG header bits of this file_2.y4m file were removed.
lav2yuv +n file_3.avi | yuvfps -v 0 -r 25:1 | yuvscaler -v O -O SVCD   > 
file_3.y4m
* note the YUV4MPEG header bits of this file_3.y4m file were removed.

cat *.y4m > sum.y4m

At this point, I try testing playing with MPLAYER. And, for any two joined 
clips, it works. 

If sum.y4m contains N y4m segments, only the first two will be shown. 

The order in which I join them does not matter. 

I wonder if I need to also need to modify other parts of the y4m file....

Any help appreciated. 

p.s. I am assuming that the size of the sum.y4m file is not an issue --and it 
does get rather big. (Same thing seems to happen regardless of sum.y4m size).






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