Re: [LAU] [OT] a sorting problem with AVSynthesis and mencoder

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Dave Phillips wrote:
> Greetings,
>
> I use the following command to invoke mencoder to compile a series of
> TGA image files into an animation :
>
> mencoder -ovc lavc -lavcopts vcodec=mpeg4:vme=1:keyint=30:vbitrate=1000
> -vf scale=800:600 -noskip -mf type=tga:fps=30 -o avs-001.avi mf://*.tga
>
>
> (Sorry about the line breaks.)
>
> The problem starts with the "mf://*.tga" part of the command. When the
> AVSynthesis program creates its TGA images it saves and labels them
> sequenctially, i.e. 1.tga, 2.tga, 3.tga and so on, as expected. The
> problem is that mencoder reads the files as they would be returned by a
> plain ls command, i.e. 1.tga, 10.tga, 100.tga, 1000.tga, 1001.tga
> ...101.tga, 1010.tga, thus interpolating frames out of their correct order.
>
> So, my question is, how do I get mencoder to read the TGA files by their
> time of creation ?

I'm not sure if you can

> That should do the trick, yes ? Otherwise I have to
> separate the single digit files from the double digit files and so
> forth, then I have to create and join separate AVIs. Not terribly
> difficult, just really annoying and time-consuming.
>
> Any suggestions ? Any mencoder users out there ?

yes, but when I found myself at this crossing, I choose the pragmatic
shell path:

mkdir sl; i=100000; for file in $(ls -tr *.sgi); do ln -s $file
sl/$i.sgi; i=$[ $i + 1 ]; done;

(no line breaks)

and run mencoder on the symlinks.

> Also, what do you use in place of mencoder on a 64-bit system ? (It's
> not available for 64 Studio.)

It's not a 64-bit problem, but ffmpeg licensing issues with 64studio.

robin

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Received on Tue Nov 27 20:15:03 2007