On Feb 11, 2008 9:09 PM, Reinhard Nissl <rnissl@xxxxxx> wrote:
> In case the decoder doesn't provide the image aspect ratio (and
> it looks like that as you had to provide the image size too),
> you'll have to extract it from the H.264 data yourself (as you
> did already for the image size).
>
OK - thanks for your help and patience Reinhard.
We are on the right track here. If I hardcode the this->ratio to be
1.8181 all looks good for my channels. However it is a hack and I have
come this far, so I might as well get the rest correct!
I used xinelibout for my H264 parser but Petri Hintukainen skips
parsing of the VUI! I am looking in your h264parser.c in VDR and you
also seem to comment this stuff out!
So, here is my code: -
if (br_get_bit(&br)) { /* VUI parameters */
if (br_get_bit(&br)) { /* Aspect Info */
uint32_t aspect_ratio_idc = br_get_u8(&br);
printf("H.264 SPS: -> Aspect Ratio IDC %d\n", aspect_ratio_idc);
const uint32_t Extended_SAR = 255;
if (aspect_ratio_idc == Extended_SAR) {
uint32_t sar_width = br_get_u16(&br);
uint32_t sar_height = br_get_u16(&br);
printf("H.264 SPS: -> SAR_Size = %dx%d\n",
sar_width, sar_height);
}
}
}
I am getting an Aspect Ratio IDC of 11 so the sar width and height
calcs are not called. What do I need to do here to get the aspect
(~1.818181)?
Thanks again!
>
> Bye.
> --
> Dipl.-Inform. (FH) Reinhard Nissl
> mailto:rnissl@xxxxxx
>
> _______________________________________________
> vdr mailing list
> vdr@xxxxxxxxxxx
> http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
>
_______________________________________________
vdr mailing list
vdr@xxxxxxxxxxx
http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
