Media (Intel® Video Processing Library, Intel Media SDK)
Access community support with transcoding, decoding, and encoding in applications using media tools like Intel® oneAPI Video Processing Library and Intel® Media SDK
Announcements
The Intel Media SDK project is no longer active. For continued support and access to new features, Intel Media SDK users are encouraged to read the transition guide on upgrading from Intel® Media SDK to Intel® Video Processing Library (VPL), and to move to VPL as soon as possible.
For more information, see the VPL website.
3076 Discussions

Mad DTS jumps are observed sometimes at h264 encoder output

OTorg
New Contributor III
‎02-10-2014 02:48 AM
528 Views

mfxBitstream::DecodeTimeStamp of some encoded frames is ~22 minutes back from it's expected value.
It occurs under certain GopPicSize/GopRefDist/NumRefFrame/IdrInterval/PicStruct encoder initialization combinations.

For example, GopPicSize = 35, GopRefDist = 4, NumRefFrame = 3, IdrInterval = 1, progressive:
out frame 70, dts is incorrect by -1310.720 seconds;
out frame 140, dts is incorrect by -1310.720 seconds;
out frame 210, dts is incorrect by -1310.720 seconds;
out frame 280, dts is incorrect by -1310.720 seconds;
etc.

And more. Number of encoded frames is less than the number of input frames under certain initialization combinations (latter combinations don't correlate with dts-jump combinations).

x86 application, MFX_IMPL_SOFTWARE, imsdk 1.8, msvs2010 (with latest updates), i7-3770, win7x64.
Demo application is attached: imsdk_h264enc_dtsjump.zip

imsdk_h264enc_dtsjump.zip
0 Kudos

Link Copied

1 Reply
Jeffrey_M_Intel1
Employee
‎02-17-2014 11:41 PM
528 Views

Sorry for the delayed reply.  Thank you for your description and reproducer.  We're looking into this and will get back to you soon with updates.

0 Kudos
Copy link
Reply

Community support is provided Monday to Friday. Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.