Video capturing. Resolution.

Gregory Demidov

Other Parts Discussed in Thread: TVP7002

Hi, all.

Both examples of video capturing technique (omx and v4l2) works with 1080P or 720P input video signal. I am wondering if it is possible to have a capturing signal with another resolution (for example – 576I). Which technique – v4l2 or omx-based – allows to do it with minimal troubles?

Regarding v4l2 capturing, when I use binaries for v4l2 capturing I have i2c access to tvp7002 and can reprogram it as I need. So, I have several questions. Which modification should I made in kernel modules? Where can I find guidelines for this modification if they are exists ever?

Regarding omx-based capturing, I don't have direct access to tvp7002. Does it means that changing of signal resolution are impossible?

Thanks.

Gregory.

over 13 years ago

0 HardikShah over 13 years ago

TI__Mastermind 20245 points

Hi,

You need to modify TVP7002 driver to support 576i. Unfortunately we dont have documentation on how to add 576i support on TVP7002. You need to modify driver at Linux kernel source $(Linux_Source)/drivers/media/tvp7002.c. If that works everything should fall in place. You can find TVP7002 datasheet at http://www.ti.com/product/tvp7002

Regards

Hardik Shah

0 Gregory Demidov over 13 years ago in reply to HardikShah

Prodigy 160 points

Hi, Hardik.

Thanks for you reply.

In the first step to facilitate the task, I plan to change only the resolution of the input signal. In this case, except tvp7002.c should I change some other modules, such as ti81xxvin or ti81xxvfb (or others)?

Thanks.

Gregory.

0 HardikShah over 13 years ago in reply to Gregory Demidov

TI__Mastermind 20245 points

Hi,

Yes, If you make TVP7002 work for 576i first it should be ok. ti81xxvin just takes what comes from TVP7002 in terms of resolution.

Regards,

Hardik Shah

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Video capturing. Resolution.