NvBufferCreateEx and NvJPEGDecoder problem

Fobos · May 20, 2020, 8:46am

Hi all.
In my application I constantly creating and destroying dmabuf_fd via NvBufferCreateEx. And I detect that NvBufferCreateEx can return dmabuf_fd that used inside NvJPEGDecoder::decodeToFd. After I destroy my buffer via NvBufferDestroy I get this error into dmesg

arm-smmu 12000000.iommu: Unhandled context fault: iova=0x14c3c0c00, fsynr=0x20003, cb=7, sid=56(0x38 - Unassigned SID), pgd=225fbe003, pud=225fbe003, pmd=206548003, pte=0

and this error into application output

nvbuf_utils: dmabuf_fd 1148 mapped entry NOT found
nvbuf_utils: Can not get HW buffer from FD... Exiting...
nvbuf_utils: dmabuf_fd 1148 mapped entry NOT found
nvbuf_utils: Can not get HW buffer from FD... Exiting...
NvBufferGetParams failed for src_dmabuf_fd

Anyone knows it’s a bug or a feature? And can anyone help with this strage behaviour?

The problem was found on the jetpack 4.3, with jetpack 4.2 all works fine except for memory leaks in NvJPEGDecoder.

DaneLLL · May 20, 2020, 9:21am

Hi,
It creates an NvBuffer in decodeToFd(). You should call NvBufferTransfom() to copy to self-allocated NvBuffer. Please refer to the code in 12_camera_v4l2_cuda:

/* Decoding MJPEG frame */
if (ctx->jpegdec->decodeToFd(fd, ctx->g_buff[v4l2_buf.index].start,
    bytesused, pixfmt, width, height) < 0)
    ERROR_RETURN("Cannot decode MJPEG");

/* Convert the decoded buffer to YUV420P */
if (-1 == NvBufferTransform(fd, ctx->render_dmabuf_fd,
        &transParams))
    ERROR_RETURN("Failed to convert the buffer");

Fobos · May 20, 2020, 9:46am

Hi, DaneLLL

I know that it’s create NvBuffer, I get parts of code from 12_camera_v4l2_cuda. In my code I create a shared_ptr wrapper that contains dmabuf_fd. And I pass the wrapped dmabuf_fd to NvBufferTransform
nvBufferTransform(jpedDecodedFd, convertI420Buffer->bufFd(), &ctx->transformParams);

NvJPEGDecoder::decodeToFd always use the same buffer after creation. When I create my wrapped buffer via NvBufferCreateEx I noticed that it can return already used fd by NvJPEGDecoder. And when the my wrapped dmabuf_fd destroy, it destroy NvJPEGDecoder buffer too.

DaneLLL · May 20, 2020, 11:32pm

Hi,
We suggest you follow 12_camera_v4l2_cuda. Once you get the decoded data through decodeToFd(), copy it to another NvBuffer right away.

Fobos · May 27, 2020, 11:29am

Hi DaneLLL

Thank you for your answer, but it seems this is not quite my case.

Here is my debug output:

NvBufferCreateEx return dmabuf_fd: 1027
NvBufferCreateEx return dmabuf_fd: 1028
NvBufferCreateEx return dmabuf_fd: 1029
NvBufferCreateEx return dmabuf_fd: 1030
~ NvBufferDestroy dmabuf_fd 1029
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
NvBufferCreateEx return dmabuf_fd: 1064
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
NvBufferCreateEx return dmabuf_fd: 1064
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
-- jpegdec->decodeToFd: 1062
NvBufferCreateEx return dmabuf_fd: 1064
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
NvBufferCreateEx return dmabuf_fd: 1064
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
NvBufferCreateEx return dmabuf_fd: 1064
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
NvBufferCreateEx return dmabuf_fd: 1064
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
NvBufferCreateEx return dmabuf_fd: 1064
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
NvBufferCreateEx return dmabuf_fd: 1064
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
NvBufferCreateEx return dmabuf_fd: 1064
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1064
~ NvBufferDestroy dmabuf_fd 1063
NvBufferCreateEx return dmabuf_fd: 1063
NvBufferCreateEx return dmabuf_fd: 1064
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1063
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
NvBufferCreateEx return dmabuf_fd: 1062	<----------------------- Here is error
~ NvBufferDestroy dmabuf_fd 1062	 <----------------------- After that jpegdec or NvBufferTransform can no longer work normally
-- jpegdec->decodeToFd: 1062
~ NvBufferDestroy dmabuf_fd 1035
NvBufferCreateEx return dmabuf_fd: 1035
NVMAP_IOC_FREE failed: Bad file descriptor
nvbuf_utils: dmabuf_fd 1062 mapped entry NOT found
nvbuf_utils: Can not get HW buffer from FD... Exiting...
nvbuf_utils: dmabuf_fd 1062 mapped entry NOT found
nvbuf_utils: Can not get HW buffer from FD... Exiting...
NvBufferGetParams failed for src_dmabuf_fd
nvbuffer_transform Failed

I do not fully understand how this can happen if a function should return a free buffer, and it returns a buffer that is already used to decode jpeg.
Now I think the error is that buffers are created in one thread and destroyed in another.

DaneLLL · May 28, 2020, 12:27am

Hi,
Your usecase look similar to 12_camera_v4l2_cuda. If the sample works, it is very likely something wrong in your implementation.

Os you may share a patch on 12_camera_v4l2_cuda so that we can reproduce the issue.

Fobos · May 28, 2020, 6:01am

Hi, DaneLLL

Your usecase look similar to 12_camera_v4l2_cuda . If the sample works, it is very likely something wrong in your implementation.

Os you may share a patch on 12_camera_v4l2_cuda so that we can reproduce the issue.

I think that this is the most likely option, but still it is not clear why the same code works fine with the jetpack 4.2 and on 4.3 it produces errors.