[MEncoder-users] DVD creation problem, settop player cuts off boarder

[James Hastings-Trew]

karl-heinz-1950 at web.de wrote:
>> The source material can have any resolution. It could be 320x240,
>> or 720x480, or 1920x1280. The output is 720x480, with the original
>> source now occupying 656x448 and with black bars. I suggested
>> passing the arguments to mplayer because then mplayer would
>> declare (if you are using the cli in a terminal) what the output
>> resolution was, so there would be no question.
>>     
>
> running mplayer with the original input file is
>
> Playing final-out.mpg.
> MPEG-PS file format detected.
> VIDEO:  MPEG2  720x576  (aspect 3)  25.000 fps  15000.0 kbps (1875.0 kbyte/s)
> [...]
> VO: [xv] 720x576 => 1024x576 Planar YV12
>
>
> running mplayer with -vf scale=720:576,expand=-64:-32:32:16 I see
>
> Playing final-out.mpg.
> MPEG-PS file format detected.
> VIDEO:  MPEG2  720x576  (aspect 3)  25.000 fps  15000.0 kbps (1875.0 kbyte/s)
> Opening video filter: [expand w=-64 h=-32 x=32 y=16]
> Expand: -64 x -32, 32 ; 16, osd: 0, aspect: 0.000000, round: 1
> Opening video filter: [scale w=720 h=576]
> [...]
> VO: [xv] 784x608 => 1115x608 Planar YV12
>
>
> So the resulting output file is now larger than the PAL specification, this is a problem. Since the original file was already at the original PAL specification I have to scale it down and thus loose quality.
>
> I tried to run mencoder with the vf option like this 
>
> mencoder -of mpeg -vf scale=720:576,expand=-64:-32:32:16 -mpegopts format=dvd:tsaf -oac copy -ovc copy -o final-out-scale.mpg  input.ts
>
> running this file with mplayer shows
>
> Playing final-out-scale.mpg.
> MPEG-PS file format detected.
> VIDEO:  MPEG2  720x576  (aspect 3)  25.000 fps  15000.0 kbps (1875.0 kbyte/s)
> [...]
> VO: [xv] 720x576 => 1024x576 Planar YV12
>
> I would have expected that this would result into the same output as taking the original input file and using the vf command. But instead it looks like that it doesn't have any effect. What is wrong here?
>
> Second "new" issue is that I run the film on my computer LCD screen and compared it with the output of my LCD TV. Give or take I would say my TV cuts off at each end 1/6 of my picture, this is in total 1/3 of my picture!! Adding a black bar like this around the picture is a bit strange, isn't it? I really would loose lots of picture information?
>   
Time to adjust your TV or get a newer one. :)



__________ Information from ESET NOD32 Antivirus, version of virus signature database 3958 (20090324) __________

The message was checked by ESET NOD32 Antivirus.

http://www.eset.com