add definition to enforce both reflist not empty #364
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OK for me, and @xhaihao ? |
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According to new status, I think this info may not be enough. But on TGL, only low-delay-b for VMEPAK and only low-delay-b for VDENC. This flag means the non low-delay-b is necessary for some entrypoint, then with this flag set, we must set low-delay-b enabled. But for ICELake's VMEPAK case, if this flag is set, we then can not choose non low-delay-b mode. And if not set, we do not know whether the low-delay-b mode is available. |
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@HeJunyan , hi , I am not sure whether I understand your concern, it just used to distinguish whether driver support P frame, if P frame is not support , it should be 1. or it should be 0 |
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So, if this flag set, means only non-P support, and if not set, we can choose P and non-P, one of them? |
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For example, on ICELake, VDENC does not support P, so this flags is set, and I willl always set low-delay-b enabled, just ignore the user setting of low-delay-b. I am worried about when we really do not support low-delay-b, but user force to use it, just like the last case above, the GPU will hang, and really bad user experience. |
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@HeJunyan |
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Synced with @xhaihao , OK now, no problems. Please help to merge it. thanks. |
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I note that on ICElake VDEnc, VAConfigAttribEncMaxRefFrames query return ref0 is 3 and ref1 is 0. So, B frame is not supported. But the low-delay-b just converts P to B. So according to my understand, we should support B and then can support low-delay-b, am I right? |
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Any update for this MR? |
fulinjie
added a commit
to fulinjie/ffmpeg
that referenced
this pull request
Apr 13, 2020
Low delay B-frame is supported on ICL+ platform. For low power encoding, low_delay_b should be enabled by default. Low delay B: <http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html> There is an on-going work in libva and media-driver to add querys support for low delay b, would add it once it's ready: intel/libva#220 intel/libva#364 intel/media-driver#721 Signed-off-by: Linjie Fu <linjie.fu@intel.com>
it is a suppliment of intel#220 to distinguish P frame and low delay B frame Signed-off-by: Carl Zhang <carl.zhang@intel.com>
fulinjie
added a commit
to fulinjie/ffmpeg
that referenced
this pull request
Apr 14, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
Allows forward-predict only for all B frames, L0 == L1, supported
on ICL+ platforms, required by VDENC(low_power).
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allows bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
fulinjie
added a commit
to fulinjie/ffmpeg
that referenced
this pull request
Apr 18, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B, allows forward-predict only for all B frames, L0 == L1, supported
on ICL+ platforms, required by VDENC(low_power).
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
fulinjie
added a commit
to fulinjie/ffmpeg
that referenced
this pull request
Apr 21, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, supported on ICL+ platforms, required by
VDENC(low_power).
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
fulinjie
added a commit
to fulinjie/ffmpeg
that referenced
this pull request
Apr 21, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
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@xhaihao ,could you help to approve it? |
xhaihao
approved these changes
May 12, 2020
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@XinfengZhang please help to merge it. And help to implement it in the media driver, especially for VME mode. So far, VAConfigAttribPredictionDirection query for VME mode just return error. |
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@HeJunyan , there are already a PR with media driver intel/media-driver#858 |
feiwan1
pushed a commit
to feiwan1/ffmpeg-cartwheel
that referenced
this pull request
May 15, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
feiwan1
pushed a commit
to feiwan1/ffmpeg-cartwheel
that referenced
this pull request
May 25, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
fulinjie
added a commit
to fulinjie/ffmpeg
that referenced
this pull request
Jun 1, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
liuyinhangx
pushed a commit
to liuyinhangx/ffmpeg-cartwheel
that referenced
this pull request
Jul 14, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
feiwan1
pushed a commit
to feiwan1/ffmpeg-cartwheel
that referenced
this pull request
Sep 10, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
feiwan1
pushed a commit
to feiwan1/ffmpeg-cartwheel
that referenced
this pull request
Oct 19, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
feiwan1
pushed a commit
to feiwan1/ffmpeg-cartwheel
that referenced
this pull request
Nov 2, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
feiwan1
pushed a commit
to feiwan1/ffmpeg-cartwheel
that referenced
this pull request
Nov 2, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
xhaihao
pushed a commit
to xhaihao/ffmpeg-cartwheel
that referenced
this pull request
Nov 9, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
feiwan1
pushed a commit
to feiwan1/ffmpeg-cartwheel
that referenced
this pull request
Nov 26, 2020
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
wenbinc-Bin
pushed a commit
to wenbinc-Bin/ffmpeg-ci
that referenced
this pull request
Jan 6, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
wenbinc-Bin
pushed a commit
to wenbinc-Bin/ffmpeg-ci
that referenced
this pull request
Jan 6, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
xhaihao
pushed a commit
to xhaihao/FFmpeg
that referenced
this pull request
Mar 11, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
xhaihao
pushed a commit
to xhaihao/FFmpeg
that referenced
this pull request
Apr 30, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
xhaihao
pushed a commit
to xhaihao/FFmpeg
that referenced
this pull request
Jun 9, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
changchingyew
pushed a commit
to changchingyew/FFmpeg
that referenced
this pull request
Aug 17, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
xhaihao
pushed a commit
to xhaihao/FFmpeg
that referenced
this pull request
Aug 26, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
xhaihao
pushed a commit
to xhaihao/FFmpeg
that referenced
this pull request
Aug 27, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
xhaihao
pushed a commit
to xhaihao/FFmpeg
that referenced
this pull request
Aug 27, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
xhaihao
pushed a commit
to xhaihao/FFmpeg
that referenced
this pull request
Aug 27, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
xhaihao
pushed a commit
to xhaihao/FFmpeg
that referenced
this pull request
Oct 21, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
changchingyew
pushed a commit
to changchingyew/FFmpeg
that referenced
this pull request
Oct 22, 2021
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
feiwan1
pushed a commit
to feiwan1/ffmpeg
that referenced
this pull request
Mar 1, 2022
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
feiwan1
pushed a commit
to feiwan1/ffmpeg
that referenced
this pull request
Mar 22, 2022
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
feiwan1
pushed a commit
to feiwan1/ffmpeg
that referenced
this pull request
May 24, 2022
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
This patch will be removed after
intel/media-driver#1382 is merged.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
tong1wu
pushed a commit
to tong1wu/ffmpeg
that referenced
this pull request
Jun 6, 2022
Allow user to choose between I/P/B frames:
- normal
Ordinary IB..BPB..B GOP structure.
- low delay B-frames:
IB..B GOP structure, P frames replaced by B frames, allows forward-predict
only for all B frames, L0 == L1, required by VDENC(low_power),
optional for VMEPAK.
- reference B-frames:
Convert P-frames to low delay B-frames, normal B frames still have
2 different ref_lists and allow bi-prediction.
Low delay B:
<http://what-when-how.com/Tutorial/topic-397pct9eq3/High-Efficiency-Video-Coding-HEVC-288.html>
There is an on-going work in libva and media-driver to add querys
support for low delay b, would add it once it's ready:
intel/libva#220
intel/libva#364
intel/media-driver#721
Rebased a bit for this internal branch.
This patch will be removed after
intel/media-driver#1382 is merged.
Signed-off-by: Linjie Fu <linjie.fu@intel.com>
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it is a suppliment of #220
to distinguish P frame and low delay B frame
Signed-off-by: Carl Zhang carl.zhang@intel.com