This pre-release of open source Intel® Media SDK features Media Server Studio 2018 R1 and CentOS 7.4 support. Release highlights available at Intel® Developer Zone article.
Whats new comparing to 1.2a:
- API 1.25
- Enhances AVC compression efficiency and video quality features
- Improves HEVC encode video quality and CPU utilization for multiple media sessions running simultaneously
- Enabled setting the NALU type for HEVC encoder order mode
- Enabled the interlaced content encoding for HEVC
- Increases performance significantly for Sessions Joining API
- Enabled VPP Deinterlacer to handle content that alternates between Progressive/Interlaced frame, Top Field First (TFF) and Bottom Field First (BFF)
- Supports CentOS 7.4 - providing new features, security updates
- Enhanced FEI capabilities:
- Improved video quality with fade in/fade out by applying multiplicative weighting factor and an additive offset to the motion compensated prediction
- Enabled the number of repack passes report for H.264 to help bitrate control tuning
- Added P/I field encoding (first field as P field, second field as I field) to improve quality
- Preview functionality added to this release Multi-Frame encode APIs:
- Multi-Frame encode APIs support added helping to improve transcoding dencity in multi-stream scenario, following known limitations apply to current implementation:
- Only H264 Encode is supported at a moment
- Optimized only for Xeon E3 1500 v5 series
- Performance can be worse than usual single-frame in next known cases:
- 4K resolution encoding
- N:N with HEVC decode present in pipeline
- cases where framerates differs significantly like 30 and 60 for different streams
- Following functionality is not supported with multi-frame encode operation and when set, multiframe will be disabled:
- When number of slices is controlled by parameters NumSlice, NumSliceI, NumSliceP, NumSliceB.
- ‘intra refresh’ parameters are not supported.
The current version of Intel Media SDK is only compatible with the Linux* Graphics Driver from Intel® Media Server Studio for Linux*. You need to download and install Intel Media Server Studio 2018 R1 before you build this version of Intel Media SDK. Intel Media SDK depends on a special version of LibVA which comes with Intel Media Server Studio installation and is not in upstream, so this version is not compatible with the LibVA/driver available at 01.org.
Additinal limitations specific for open source release:
SW fallback is unsupported for all components.
Rotation not supported.