Sorry to reply on the list, but your host ist blacklisted, so I cannot send email to you.
I tried to use some automatic guesses from y4mscaler, but they did not do what's IMHO right.
Example: I have an NTSC AVI with 640x352 16:9. I want to transcode it to MPEG2 NTSC 4:3 (720x480). According to my calculations, this means X-scaling to 720 and adding 2 black letterbox bars of 64 pixels each:
I calculate: destX = TVwidth destY = TVheight x 4/3 x sourceY/sourceX letterbox = (TVheight - destY) / 2
So: destX = 720 destY = 480 x 4/3 x 352/640 = 352 (that means, I do not have to scale Y) letterbox = (480 - 352) / 2 = 64
I tried telling y4mscaler that the source is NTSC_WIDE and the destination is NTSC, I also tried supplying the destination size, but I always ended up with one of these problems: - uses only 630x350 of the source - sets destination active area to 720x204 or something
So I now provide all info manually (source size, dest size, dest active, dest pos) and this works. Maybe I did something wrong, maybe it's a bug.
Thomas
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