Re: [Semi-OT] Cropping a letterbox MPEG-2 file is easy enough...
On 2010-12-10 22:03:55 -0600, Ron Johnson wrote:
> But how do I save the output?
>
> After reading the mplayer and ffmpeg man page and Googling, these
> are the three methods I tried, but none of them work.
>
> $ mplayer foo.mpeg -vf crop=720:352:0:64 \
> -dumpstream -dumpfile bar.mpeg
>
> $ mplayer foo.mpeg -vf crop=720:352:0:64 -o bar.mpeg
>
> $ mencoder foo.mpeg -vf crop=720:352:0:64 \
> -ovc copy -oac copy -o bar.mpeg
>
> $ ffmpeg -i foo.mpeg -vf crop=720:352:0:64 \
> -vcodec copy -acodec copy bar.mpeg
How about this one:
mencoder foo.mpeg \
-vf crop=720:352:0:64 \
-oac copy \
-ovc lavc \
-lavcopts vcodec=mpeg2video \
-o newfile.avi
This one is a little tricky, because mencoder will transcode
your file if you're not careful. So this part...
-ovc lavc -lavcopts vcodec=mpeg2video
...needs to change according to what your source material is.
I think the above might work for DVD material?
> (Yes, Handbrake makes the job trivial, but no, I don't want to
> transcode the file, just "crop and save". Disk is cheap and I want
> to retain DVD quality.)
I also hate to have quality degraded, which happens very easily
with videos.
Hope this helps,
Phil
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