Why am I getting frames with incorrect timestamps?

[parksh]

Hello?

sample_multi_transcode(https://github.com/oneapi-src/oneVPL/blob/master/tools/legacy/sample_multi_transcode)

sample_multi_transcode -i::h264 INPUT.h264 -o::h264 OUTPUT.h264 -hw -FRC::INTERP -f 30.00 -w 320 -h 180 -FRC::INTERP -gop_size 150 -dist 1

Why am I getting frames with incorrect timestamps?

CPU : i7-11700
OS : Windows 10 Pro for Workstations
API version : 2.3
oneVPL version : master version(2023.2.1)
libmfx64-gen.dll
- File Version : 11.21.6.24
- Product Version : 11.0.0.004

Thanks in advance for your reply.

[AthiraM_Intel]

Hi,

Thank you for posting in Intel Communities.

We assume that you have modified the code. Could you please share the sample reproducer code which has your modifications and the exact steps you followed?

Thanks

[parksh]

This is the sample code I tested.

run sample_multi_transcode.exe

sample_multi_transcode.exe -i::h264 INPUT.h264 -o::h264 OUTPUT.h264 -hw -FRC::INTERP -f 30.00 -w 320 -h 180 -FRC::INTERP -gop_size 150 -dist 1

Thanks

[AthiraM_Intel]

Hi,

Thank you for sharing the details. We are checking on this internally. We will get back to you soon with an update.

Thanks

[AthiraM_Intel]

Hi,

We are getting dependency issues while building the sample which you shared.

Could you please share the reproducer code with all the dependencies.

Also share the steps to build the sample.

Thanks

[parksh]

https://github.com/oneapi-src/oneVPL/tree/master/tools/legacy/sample_common/include/mfx_samples_config.h

https://github.com/oneapi-src/oneVPL/tree/master/api/vpl/mfxdefs.h

The oneVPL github master version installation path was dependenced.

Not the modified source I provided
Even if you debug with the oneVPL github master version, if you test with the input video sample I provided,
(https://github.com/oneapi-src/oneVPL/blob/master/tools/legacy/sample_multi_transcode/src/pipeline_transcode.cpp#L2092)
In this part, the bitstream DecodingTimeStamp, TimeStamp -1 will be returned.

I wonder how I can understand why the bitstream that returns as -1 exists.

thanks

[AthiraM_Intel]

Hi,

We are checking on this internally. We will get back to you with an update.

Thanks