Unlimited multi GPU support in transcoding

[zsc_IM]

Hello,

I plan to build a server with 6/8/more GPUs. But If I specify "qsv_device 4" in ffmpeg, an error will be reported. I think this is due not to ffmpeg but to intel. I've found a problem when I checked through oneVPL SDK, it might not support 5 GPUs or more, as it defines up to 4th device only.

https://spec.oneapi.io/onevpl/latest/API_ref/VPL_enums.html#mfximplhttps://spec.oneapi.io/onevpl/latest/API_ref/VPL_enums.html#mfximpl

enum {
MFX_IMPL_AUTO = 0x0000, /*!< Auto Selection/In or Not Supported/Out. */
MFX_IMPL_SOFTWARE = 0x0001, /*!< Pure software implementation. */
MFX_IMPL_HARDWARE = 0x0002, /*!< Hardware accelerated implementation (default device). */
MFX_IMPL_AUTO_ANY = 0x0003, /*!< Auto selection of any hardware/software implementation. */
MFX_IMPL_HARDWARE_ANY = 0x0004, /*!< Auto selection of any hardware implementation. */
MFX_IMPL_HARDWARE2 = 0x0005, /*!< Hardware accelerated implementation (2nd device). */
MFX_IMPL_HARDWARE3 = 0x0006, /*!< Hardware accelerated implementation (3rd device). */
MFX_IMPL_HARDWARE4 = 0x0007, /*!< Hardware accelerated implementation (4th device). */
MFX_IMPL_RUNTIME = 0x0008, /*!< This value cannot be used for session initialization. It may be returned by the MFXQueryIMPL
function to show that the session has been initialized in run-time mode. */
MFX_IMPL_VIA_ANY = 0x0100, /*!< Hardware acceleration can go through any supported OS infrastructure. This is the default value. The default value
is used by the legacy Intel(r) Media SDK if none of the MFX_IMPL_VIA_xxx flags are specified by the application. */
MFX_IMPL_VIA_D3D9 = 0x0200, /*!< Hardware acceleration goes through the Microsoft* Direct3D* 9 infrastructure. */
MFX_IMPL_VIA_D3D11 = 0x0300, /*!< Hardware acceleration goes through the Microsoft* Direct3D* 11 infrastructure. */
MFX_IMPL_VIA_VAAPI = 0x0400, /*!< Hardware acceleration goes through the Linux* VA-API infrastructure. */
MFX_IMPL_VIA_HDDLUNITE = 0x0500, /*!< Hardware acceleration goes through the HDDL* Unite*. */

MFX_IMPL_UNSUPPORTED = 0x0000 /*!< One of the MFXQueryIMPL returns. */
};

Therefore, I would like to know what considerations led you to implement such restrictions. Will you add unlimited multi GPU support in transcoding in the future?

Thanks in advance!

[AthiraM_Intel]

Hi,

Thank you for posting in Intel Communities.

Since this is a duplicate thread of (https://community.intel.com/t5/Media-Intel-oneAPI-Video/Unlimited-multi-GPU-support-in-transcoding/m-p/1468106#M14551), we will no longer monitor this thread. We will continue addressing this issue in the other thread.

Thanks