omap-l138 capture UYVY data

kent chow

Other Parts Discussed in Thread: OMAPL138

We use BT656 capture UYVY data, capture buffer can receive data，but it can not display properly when play by PYUV without interleaved:

play by PYUV with interleaved:

modify PAL parameter ".ycmux_mode = 0" of ch_params in VPIF.C and play by PYUV without interleaved:

play by PYUV with interleaved:

PAL setting of ch_params is:

{
.name = "PAL_BDGHIK",
.width = 720,
.height = 576,
.frm_fmt = 0,
.ycmux_mode = 1,
.eav2sav = 280,
.sav2eav = 1440,
.l1 = 1,
.l3 = 23,
.l5 = 311,
.l7 = 313,
.l9 = 336,
.l11 = 624,
.vsize = 625,
.capture_format = 0,
.vbi_supported = 1,
.hd_sd = 0,
.stdid = V4L2_STD_625_50,
},

Can some help us solve this problem?

over 10 years ago

0 Titusrathinaraj Stalin over 10 years ago

TI__Guru** 116100 points

Hi Kent,

Could you explain a bit on what you are doing ?

What SDK version are you using ?

0 kent chow over 10 years ago in reply to Titusrathinaraj Stalin

Prodigy 205 points

Hi, Titus S.

We use BIOSLINUXMCSDK-OMAPL13X, but the kernel is change to davinci-linux-3.8.0 because we want to use IPC3.0. The video decoder is TW9910, it can output UYVY video only. The TW9910 is work properly, but the data that L138 get can not display properly. So we want to know how to caputre the UYVY video on L138 ?

0 Sivaraj Kuppuraj over 10 years ago in reply to kent chow

TI__Mastermind 35645 points

Hi Kent,

To my opinion, omapl138 CMOS camera sensor is used to capture/receive raw image or video data in YCbCr 4:2:2 (YUV) format. May be, you can use by converting UYVY video data to YUV data and feed it to the imaging sensor, but not directly feeding the UYVY video data to omapl138 image sensor which do not support this format.

Thanks & regards,

Sivaraj K

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0 kent chow over 10 years ago in reply to Sivaraj Kuppuraj

Prodigy 205 points

I had solved this problem. Because the video that i get from buffer is YUV422SP format, so the video display properly after i change this format to YUV422P.

0 Titusrathinaraj Stalin over 10 years ago in reply to kent chow

TI__Guru** 116100 points

Hi Kent,

Sounds good.

Thanks for your update.

Could you please update here on what change you have done in PAL setting structure for YUV422.

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omap-l138 capture UYVY data