failed to create capture device

Glitter

Hi,

I am trying to run video_loopback in the apps of dmai_2_10_00_17 for dm365,but it couldn't work,the problem is as follows:

vpfe ccdc capture vpfe ccdc capture.1: hpitch = 720, vpitch = 576, bpp=2

[DMAI][capture.cvpfe ccdc capture vpfe ccdc capture.1: hpitch=720,vpitch=576,bpp=2] videoStd=6,width=720,height=576

[DMAI][capture.c] 2 videoStd=6, width=720, height=576

pixelFormat 1=842094158, 2=1498831189

[DMAI][CAP] 12

Failed to create capture device

the problem seems to be the different of the pixelFormat ,so i try to change the Capture_create() in the Capture.c ,but no matter how

i change or add the messages to print, no response to me.So i am puzzled whether the Capture.c links to the appmain.c .Anyone can tell me how to fix it?

Thank you !

over 14 years ago

0 Niclas over 14 years ago

TI__Expert 3220 points

Hello,

You should set the DMAI_DEBUG environment variable while executing your application to get the DMAI log messages, e.g.:

DMAI_DEBUG=2 ./myapp

You can read this and more in the DMAI user's guide shipped in the docs/ folder of the product.

Regards, Niclas

0 Glitter over 14 years ago in reply to Niclas

Prodigy 40 points

Hi,

I did it as your suggest,the messages like this:

@0x000eaf5e:[T:0x4001ee20] ti.sdo.dmai - [Dmai] Dmai log level set to '2'. Note that calling CERuntime_init after this point may cause unexpected change to DMAI tracing.
@0x00153964:[T:0x4001ee20] ti.sdo.dmai - [Capture] COMPOSITE input selected
@0x001a57eb:[T:0x4001ee20] ti.sdo.dmai - [Capture] Checking video standard
@0x001a5b54:[T:0x4001ee20] ti.sdo.dmai - [Capture] Capture input set to COMPOSITE
@0x001a5cfc:[T:0x4001ee20] ti.sdo.dmai - [BufTab] Allocating BufTab for 6 buffers
@0x001a5f80:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Alloc Buffer of size 529920 at 0x402f2000 (0x871d6000 phys)
@0x001a61b5:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Alloc Buffer of size 529920 at 0x4046c000 (0x8705c000 phys)
@0x001a6449:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Alloc Buffer of size 529920 at 0x405e6000 (0x86ee2000 phys)
@0x001a6656:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Alloc Buffer of size 529920 at 0x40760000 (0x86d68000 phys)
@0x001a6852:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Alloc Buffer of size 529920 at 0x408da000 (0x86bee000 phys)
@0x001a6a35:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Alloc Buffer of size 529920 at 0x40a54000 (0x86a74000 phys)
-------------------===================1=======================
@0x0020d2e3:[T:0x4001ee20] ti.sdo.dmai - [Capture] COMPOSITE input selected
vpfe ccdc capture vpfe ccdc capture.1: hpitch = 720, vpitch = 480, bpp = 2
@0x0025edba:[T:0vpfe ccdc capture vpfe ccdc capture.1: hpitch = 720, vpitch = 480, bpp = 2
x4001ee20] ti.sdo.dmai - [Capture] Checking video standard
@0x0025ef26:[T:0x4001ee20] ti.sdo.dmai - [Capture] Capture input set to COMPOSITE
[DMAI][capture.c] videoStd=5, width=720, height=480
[DMAI][capture.c] 2 videoStd=5, width=720, height=480
@0x0025f05f:[T:0x4001ee20] ti.sdo.dmai - [Capture] Capture dimention is set to 480x720
@0x00262bfd:[T:0x4001ee20] ti.sdo.dmai - [Capture] Video input connected size 720x480 pitch 1440
pixelFormat 1=842094158, 2=1498831189
[DMAI][CAP]                     12
@0x00262d77:[T:0x4001ee20] ti.sdo.dmai - [Capture] Pixel format 0x3231564e not supported. Received 59565955
Failed to create capture device
@0x002630ba:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Free Buffer of size 529920 at 0x402f2000 (0x871d6000 phys)
@0x00263bc2:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Free Buffer of size 529920 at 0x4046c000 (0x8705c000 phys)
@0x00264660:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Free Buffer of size 529920 at 0x405e6000 (0x86ee2000 phys)
@0x00265191:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Free Buffer of size 529920 at 0x40760000 (0x86d68000 phys)
@0x00265c3c:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Free Buffer of size 529920 at 0x408da000 (0x86bee000 phys)
@0x002666d8:[T:0x4001ee20] ti.sdo.dmai - [Buffer] Free Buffer of size 529920 at 0x40a54000 (0x86a74000 phys)

the problem is Pixel format not supported, i try to change the Capture.c ,because souce code in Capture.c have these sentence

printf("pixelFormat 1=%d, 2=%d\n", (int)pixelFormat, (int)fmt.fmt.pix.pixelformat);
#if 1           printf("[DMAI][CAP]   12  \n");
    if (pixelFormat != fmt.fmt.pix.pixelformat) {
        Dmai_err2("Pixel format 0x%x not supported. Received %x\n",
            pixelFormat, fmt.fmt.pix.pixelformat);
        cleanup(hCapture);
        return NULL;

from the [dmai] message " pixelFormat 1=842094158, 2=1498831189 " ,we know 1 not equal to 2 ,so will return Null.Maybe this is the problem.

So i try to change them to be equal ,but there is no response to me.And i add some sentences (e.g printf(“???????”)),i can't see "??????" is printed.

I don't know why . Do you have any suggestion?

Thank you!

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failed to create capture device