HEVC (High Efficiency Video Coding) is a video compression standard developed jointly by ISO/IEC and ITU-T as a successor to H.264/AVC (Advanced Video Coding). The standard was ratified in April 2013.
Questions tagged [hevc]
365 questions
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HEVC pixels of a block
so I'm playing around with the code of HEVC, and was wondering how to find the pixels of a block. To be more specific, say I have a 32x32 CU, how can I find the actual pixels in that 32x32 block?
The code I'm using to extract the CU is (taken form…
Kurt Ricci
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How to decide the weight of Luma and Chroma distortion in the RDO process?
In the HEVC reference software HM, in the RDO process, the distortion contains the luma and chroma, and they have different weights. Through debugging the codes, I find the chroma weight is higher than 1. So does anyone know how to decide the the…
xkfz007
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Mixtion of Debug exe and release exe for encoder and decoder
This is about HEVC encoder and decoder
I have
** encoder and decoder in debug mode
** encoder and decoder in release mode
I know release mode optimize something.
Can we use debug encoder and release decoder?(I have not verified this)
How about…
hellocoding
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HEVC Disabling Rate Distortion Optimization in the HM Reference code
I'm using HEVC HM reference code version 10. My task is to disable the RDO of the HEVC reference encoder. For doing this i have tried to set RDOQ and RDOQTS to 0 in the configuration file, however it didn't help as the PSNR and file size before and…
Zax
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What is the definition of "Error surface" in HEVC
I'm reading a paper about sub-pixel motion estimation optimization algorithm in HEVC;
while all the proposed concepts are based on "Modeling the Error Surface" in the search range(search window)during algorithm;
Does anybody by any chance know the…
Morteza Farhang
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Not able to play H265 stream with DRM on chrome
Integrated shaka-player for HEVC/H.265 and drm encrypted videos which works fine on safari but on chrome video is not playing(HEVC/H.265 when DRM encrypted)
I can check in https://caniuse.com/?search=hevc there is support for HEVC/H.265 in chrome…
Vicky Kumar
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What is the packet diff between axis and hikvison camera for H265 rtsp packets
I have written code to process h265 rtsp packets from ip camera and record as mp4 video using hikvision camera but the same code is not recording axis camera h265 packets, I don't know why. Even I'm not able to see nall unit match in axis. I only…
dinesh
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FFmpeg: Different color brightness converting mov to mp4 with alpha
I am using this code:
ffmpeg -i in.mov -c:v hevc_videotoolbox -allow_sw 1 -alpha_quality 0.9 -tag:v hvc1 -q:v 100 -vf premultiply=inplace=1 out-n.mp4
To convert my MOV with alpha to MP4 with alpha for a web use. However the export color is…
Miguel Zafra
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In what way does this HEVC video not comply to Apples's requirements document?
My goal is to work out why a given video file does not play on Macos/Safari/Quicktime.
The background to this question is that it is possible to play HEVC videos with a transparent background/alpha channel on Safari/MacOS. To be playable, a video…
Duke Dougal
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H.265 encoding slow on Raspberry Pi 4
OpenCV is so slow on video encoding, like 20 frames per minute, (On 8GB Pi4, 256MB GPU memory, 850MHz GPU Clock, and 2147MHz on CPU Clock)
I think, threading it to one core for taking frames, another one for saving to video will make a better…
bktech2021
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Truncated rice binarization method
Based on HEVC standard, decimal quantized coefficients are binarized through different methods, e.g. Truncated Unary, Truncated Rice (k-th order), Exp-Golomb, etc.
Considering the Truncated Rice method, I cannot understand the role of cmax parameter…
Alessandro
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How to do this feature? (What's the name of this feature?)
When I built x265 today, I found a fancy feature as the following picture.
Here comes the question, what can the feature be named? And how can we realize this feature?
ps. Forgive me for the helpless title and tags. It's a great favor if someone…
Boooooooooms
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How YUV reconstructed file is produced in open source x.265 encoder?
As x.265 encoder produces reconstructed yuv video file after decoding and
I know, in open source x.265 encoder you input raw yuv video and it generates HEVC file for you along with reconstructed YUV file.
My question is, can I input HEVC file…
Muhammad Abu Bakr
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How to begin with HM for HEVC further?
I am new to HEVC.I am doing research on HEVC in HM software. i have successfully run a demo seeing Vcodex.com using ./TAppEncoder -c encoder_randomaccess.cfg -c xxxx.cfg. I understand .cfg is the configuration file which contains all the detailed…
Jeffin Ninu
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How are samples inside a PU calculated in the intra mode of HEVC?
I've read several articles about intra prediction in HEVC and I still have some questions.
For a PU of NxN pixels, we use 4xN + 1 reference samples (the row above the PU, the column at the left of the PU and the sample at the top left). Then, based…
Benjamin
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