Hi -
> From: Selva Nair <[EMAIL PROTECTED]>
> As the source is progressive ppm frames, better keep it that way.
> Use -F 24000:1001 and encode with pull down flag:
Well, as it turns out it seems that the encoder is "doing the right
thing" for me (despite my being confused ;)).
I remembered I had a copy of 'dvdview' installed and using that I can
see that mpeg2enc is generating 'top field first' :
PictureHeader:
temporal reference: 3
picture_coding_type: B
vbv_delay: 65535
fullpel forward mv: false
fullpel backward mv: false
fcode[0][0] (fw/h): 3
fcode[0][1] (fw/v): 2
fcode[1][0] (bw/h): 4
fcode[1][1] (bw/v): 3
intra dc precision: 9
picture structure: frame picture
top field first: true
frame pred frame dct: false
concealment mvs: false
q-scale type: 1
intra vlc format: 1
alternate scan: true
repeat first field: false
chroma420type(obsolet):0
progressive frame: false
This does raise the (idle) question of how would one create
a MPEG-2 progressive encoded movie? HD-TV can use 1280x768
progressive as one of its resolutions.
> I would use -S 420_mpeg2 at the ppmtoy4m stage instead of
> resampling by y4mscaler as above.
Why? I have to rescale from 720x540 to 720x480 which means going
thru y4mscaler. Seemed logical to have it do the chroma conversion
at the same time.
Cheers,
Steven Schultz
-------------------------------------------------------
This SF.net email is sponsored by: Etnus, makers of TotalView, The best
thread debugger on the planet. Designed with thread debugging features
you've never dreamed of, try TotalView 6 free at www.etnus.com.
_______________________________________________
Mjpeg-users mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/mjpeg-users
