topic MPEG-4 Encoder quality control parameters in Intel® Integrated Performance Primitives

MPEG-4 Encoder quality control parameters

bendeguy — Mon, 06 Nov 2006 20:56:01 GMT

Hi!

I'm using MPEG-4 Encoder with default MPEG-4 params. Unfortunatelly the resulting video is checked on some part of the picture. Can I get a better result somehow? Thanks in advance:

Bendeguy

Re: MPEG-4 Encoder quality control parameters

Vladimir_Dudnik — Mon, 06 Nov 2006 22:32:03 GMT

What do you mean by"checked"? Can you attach one frame screenshot? What version of IPP do you use and what is yourplatform?

Vladimir

Re: MPEG-4 Encoder quality control parameters

bendeguy — Mon, 06 Nov 2006 23:34:29 GMT

Hi Vladimir!

I made the mistake. I played the source YUV file and I found that the original YUV image checked too(I mean I can see where the borders of the squares used during the coding). I attached the video. I use IPP 5.1.1 on Windows XP.
I have one more question. I would like to make MPEG-4 video from JPEG pictures, coming from a camera. The JPEG pictures format is YCbCr444 and as far as I know I have to use YV12 as the input of the MPEG4 Encoder. Unfortunatelly I haven't found any function to convert it. Is there anything which do the conversion? Thanks in advance,

Bendeguy

Re: MPEG-4 Encoder quality control parameters

Vladimir_Dudnik — Thu, 16 Nov 2006 23:50:40 GMT

Hi Bendeguy,

If you understood you correctly your question is how to downsample YCbCr444 data to 420 format.

You can do that with following steps:

1. Convert prom pixel-interleaved representation to planar (if not already)

2. Downsample with ippiSampleDownRowH2V2_Box_JPEG_8u_C1 function (see JPEGView sample for example)

Regards,
Vladimir