# Video Codec, PyNv & OFA **URL:** https://forums.developer.nvidia.com/c/gaming-and-visualization-technologies/video-processing-optical-flow/189.md [Latest](https://forums.developer.nvidia.com/latest.md) · [Categories](https://forums.developer.nvidia.com/categories.md) · [Tags](https://forums.developer.nvidia.com/tags.md) --- ## [Video Codec SDK 13.1.15 is released](https://forums.developer.nvidia.com/t/video-codec-sdk-13-1-15-is-released/372818)
**Author:** [@mandar\_godse](https://forums.developer.nvidia.com/u/mandar_godse)\ **Replies:** 4\ **Last updated:** [August 14, 2026, 6:02pm UTC](https://forums.developer.nvidia.com/t/video-codec-sdk-13-1-15-is-released/372818 "2026-08-14T18:02:03Z")
NVIDIA Video Codec SDK 13.1.15 is now available with following enhancements: NVENC features support: UHQ mode support for iterative encoding Support application allocated CUarray as NVENC input surface AV1 Hierarchi… --- ## [PyNvVideoCodec 2.2 is released](https://forums.developer.nvidia.com/t/pynvvideocodec-2-2-is-released/380856)
**Author:** [@mandar\_godse](https://forums.developer.nvidia.com/u/mandar_godse)\ **Replies:** 4\ **Last updated:** [September 16, 2026, 10:24am UTC](https://forums.developer.nvidia.com/t/pynvvideocodec-2-2-is-released/380856 "2026-09-16T10:24:00Z")
We are pleased to announce the release of PyNvVideoCodec 2.2, the latest version of our GPU-accelerated Python library for video decoding, encoding, and transcoding , all with the simplicity and flexibility of Python. P… --- ## [System Requirements for Video Codec SDK v13.1](https://forums.developer.nvidia.com/t/system-requirements-for-video-codec-sdk-v13-1/371379)
**Author:** [@TomNVIDIA](https://forums.developer.nvidia.com/u/TomNVIDIA)\ **Replies:** 0\ **Last updated:** [May 26, 2026, 7:04pm UTC](https://forums.developer.nvidia.com/t/system-requirements-for-video-codec-sdk-v13-1/371379 "2026-05-26T19:04:59Z")
Operating System Windows 10 and 11, Server 2008 R2, Server 2012, and Linux Dependencies NVIDIA Quadro, Tesla, GRID or GeForce products. GPU Support Matrix NVIDIA Windows display driver 610.00 or new… --- ## [Video Encode and Decode GPU Support Matrix](https://forums.developer.nvidia.com/t/video-encode-and-decode-gpu-support-matrix/64780)
**Author:** [@TomNVIDIA](https://forums.developer.nvidia.com/u/TomNVIDIA)\ **Replies:** 90\ **Last updated:** [December 10, 2025, 8:30am UTC](https://forums.developer.nvidia.com/t/video-encode-and-decode-gpu-support-matrix/64780 "2025-12-10T08:30:38Z")
Hi everyone, Hoping you all might find this matrix helpful. \[url\]https://developer.nvidia.com/video-encode-decode-gpu-support-matrix\[/url\] Cheers, Tom Nvidia DevTalk Community Manager --- ## [NVENC writes truncated user-data-unregistered SEI NALs when the payload needs many emulation-prevention bytes](https://forums.developer.nvidia.com/t/nvenc-writes-truncated-user-data-unregistered-sei-nals-when-the-payload-needs-many-emulation-prevention-bytes/385936)
**Author:** [@lusoris](https://forums.developer.nvidia.com/u/lusoris)\ **Replies:** 0\ **Last updated:** [October 15, 2026, 11:43am UTC](https://forums.developer.nvidia.com/t/nvenc-writes-truncated-user-data-unregistered-sei-nals-when-the-payload-needs-many-emulation-prevention-bytes/385936 "2026-10-15T11:43:35Z")
Measured 2026-10-09 (tables in results.md inside the attached nvenc-sei-repro.zip); re-measured 2026-10-13 on driver 615.78.08. Summary With -udu\_sei 1 (FFmpeg) the NVENC SDK writes a user-data-unregistered SEI message … --- ## [Api Trial](https://forums.developer.nvidia.com/t/api-trial/385386)
**Author:** [@milosristic1](https://forums.developer.nvidia.com/u/milosristic1)\ **Replies:** 1\ **Last updated:** [October 12, 2026, 10:00am UTC](https://forums.developer.nvidia.com/t/api-trial/385386 "2026-10-12T10:00:47Z")
API Catalog trial: can generated content be used in a commercial project, and what is the path to production? Hello, I am an independent creator building a small 3D animation pipeline (Blender) for an animated series f… --- ## [PyNvVideoCodec 2.0.4 Linux CPython 3.12 wheel: two native RECORD mismatches](https://forums.developer.nvidia.com/t/pynvvideocodec-2-0-4-linux-cpython-3-12-wheel-two-native-record-mismatches/385469)
**Author:** [@nick414](https://forums.developer.nvidia.com/u/nick414)\ **Replies:** 0\ **Last updated:** [October 9, 2026, 11:32pm UTC](https://forums.developer.nvidia.com/t/pynvvideocodec-2-0-4-linux-cpython-3-12-wheel-two-native-record-mismatches/385469 "2026-10-09T23:32:31Z")
The public release advertises pynvvideocodec-2.0.4-cp312-cp312-manylinux\_2\_28\_x86\_64.whl with size 43,176,147 bytes and SHA256 b59cec7a1a3f78fad13fead78cad8b6d9686827f9ff4477080245457675a01d0. The downloaded archive matc… --- ## [RTX 5080 NVDEC crashes entire system on MP4 playback — nvlddmkm Event ID 153 — Studio Driver 591.74 and 595.79](https://forums.developer.nvidia.com/t/rtx-5080-nvdec-crashes-entire-system-on-mp4-playback-nvlddmkm-event-id-153-studio-driver-591-74-and-595-79/364465)
**Author:** [@arturitorv](https://forums.developer.nvidia.com/u/arturitorv)\ **Replies:** 2\ **Last updated:** [September 25, 2026, 5:08pm UTC](https://forums.developer.nvidia.com/t/rtx-5080-nvdec-crashes-entire-system-on-mp4-playback-nvlddmkm-event-id-153-studio-driver-591-74-and-595-79/364465 "2026-09-25T17:08:41Z")
Hi everyone, I’m experiencing an issue with my RTX 5080 where playing any MP4 file causes a complete system freeze requiring a hard reboot. MOV files work perfectly fine. I’ve spent an entire day troubleshooting and I’m… --- ## [RTX 5070 Laptop now has 8GB and 12GB versions. How do you tell which one a laptop actually has?](https://forums.developer.nvidia.com/t/rtx-5070-laptop-now-has-8gb-and-12gb-versions-how-do-you-tell-which-one-a-laptop-actually-has/384120)
**Author:** [@tidigitalsolutions0](https://forums.developer.nvidia.com/u/tidigitalsolutions0)\ **Replies:** 2\ **Last updated:** [September 24, 2026, 9:22am UTC](https://forums.developer.nvidia.com/t/rtx-5070-laptop-now-has-8gb-and-12gb-versions-how-do-you-tell-which-one-a-laptop-actually-has/384120 "2026-09-24T09:22:52Z")
I noticed the RTX 5070 Laptop GPU now comes in a 12GB version alongside the original 8GB one. Both are just called “RTX 5070”, and a lot of manufacturer spec pages don’t say which VRAM the laptop ships with, or bury it i… --- ## [D3D11VA HEVC 4:4:4 stopped working since driver version 616.56 update](https://forums.developer.nvidia.com/t/d3d11va-hevc-44-stopped-working-since-driver-version-616-56-update/383587)
**Author:** [@htq1](https://forums.developer.nvidia.com/u/htq1)\ **Replies:** 1\ **Last updated:** [September 23, 2026, 9:45pm UTC](https://forums.developer.nvidia.com/t/d3d11va-hevc-44-stopped-working-since-driver-version-616-56-update/383587 "2026-09-23T21:45:47Z")
Decoding 4:4:4 HEVC video using D3D11VA on drivers 616.56 or newer does not work. Rolling back to the newest driver before 616.56 fixes the issue immediately. --- ## [Feedback and Questions Regarding RTX VSR Improvements and Future RTX Video Features](https://forums.developer.nvidia.com/t/feedback-and-questions-regarding-rtx-vsr-improvements-and-future-rtx-video-features/383633)
**Author:** [@damjan.b1984](https://forums.developer.nvidia.com/u/damjan.b1984)\ **Replies:** 0\ **Last updated:** [September 18, 2026, 2:26pm UTC](https://forums.developer.nvidia.com/t/feedback-and-questions-regarding-rtx-vsr-improvements-and-future-rtx-video-features/383633 "2026-09-18T14:26:40Z")
Hello NVIDIA team I use RTX Video Super Resolution (RTX VSR) every day for watching local videos (mostly 1080p → 1440p, and soon 1080p → 4K). I want to start by saying thank you — RTX VSR has genuinely improved my viewi… --- ## [RTX 5050 on ARM64/CIX P1: NVENC fails with error 21 on driver 615.71.09, works on 610.57.04](https://forums.developer.nvidia.com/t/rtx-5050-on-arm64-cix-p1-nvenc-fails-with-error-21-on-driver-615-71-09-works-on-610-57-04/382838)
**Author:** [@Nitrobenzene](https://forums.developer.nvidia.com/u/Nitrobenzene)\ **Replies:** 0\ **Last updated:** [September 10, 2026, 1:06am UTC](https://forums.developer.nvidia.com/t/rtx-5050-on-arm64-cix-p1-nvenc-fails-with-error-21-on-driver-615-71-09-works-on-610-57-04/382838 "2026-09-10T01:06:21Z")
RTX 5050 on ARM64/CIX P1: NVENC fails with error 21 on driver 615.71.09, works on 610.57.04 Hello NVIDIA team, I am testing an NVIDIA GeForce RTX 5050 on an ARM64 platform based on the CIX P1 / CD8180 SoC (Radxa Orion O… --- ## [AV1 streaming on L4](https://forums.developer.nvidia.com/t/av1-streaming-on-l4/275254)
**Author:** [@docent31](https://forums.developer.nvidia.com/u/docent31)\ **Replies:** 1\ **Last updated:** [September 6, 2026, 12:55am UTC](https://forums.developer.nvidia.com/t/av1-streaming-on-l4/275254 "2026-09-06T00:55:32Z")
Hi there, I am trying to do live stream transcoding with FFMPEG using Nvidia hardware acceleration on L4 GPU and I am getting error message like " Stream 0, codec av1, is muxed as a private data stream and may not be re… --- ## [SimpleDecoder.\_\_getitem\_\_ incorrectly validates exclusive \[stop\] of Python slice](https://forums.developer.nvidia.com/t/simpledecoder-getitem-incorrectly-validates-exclusive-stop-of-python-slice/362677)
**Author:** [@nikil.ragav1](https://forums.developer.nvidia.com/u/nikil.ragav1)\ **Replies:** 2\ **Last updated:** [September 3, 2026, 8:18am UTC](https://forums.developer.nvidia.com/t/simpledecoder-getitem-incorrectly-validates-exclusive-stop-of-python-slice/362677 "2026-09-03T08:18:17Z")
Library version: PyNvVideoCodec 2.1.0 (pip, pynvvideocodec==2.1.0) Bug: SimpleDecoder.\_\_getitem\_\_ calls self.validate\_index(key.stop) on the exclusive stop of a Python slice. This raises IndexError when stop == len(dec… --- ## [Updating PyNvVideoCodec so it works with latest setuptools](https://forums.developer.nvidia.com/t/updating-pynvvideocodec-so-it-works-with-latest-setuptools/363130)
**Author:** [@kushalkolar](https://forums.developer.nvidia.com/u/kushalkolar)\ **Replies:** 2\ **Last updated:** [August 18, 2026, 5:13am UTC](https://forums.developer.nvidia.com/t/updating-pynvvideocodec-so-it-works-with-latest-setuptools/363130 "2026-08-18T05:13:00Z")
Hi, PyNvVideoCodec is useful but it’s not installable with newer version of setuptools and I couldn’t get it to install on python3.13 so I’ve resorted to a python3.12 venv. pkg\_resources was removed recently, and importl… --- ## [nvEncOpenEncodeSessionEx return NV\_ENC\_ERR\_UNSUPPORTED\_DEVICE in RTX5080](https://forums.developer.nvidia.com/t/nvencopenencodesessionex-return-nv-enc-err-unsupported-device-in-rtx5080/379787)
**Author:** [@liuq1](https://forums.developer.nvidia.com/u/liuq1)\ **Replies:** 0\ **Last updated:** [August 11, 2026, 3:22am UTC](https://forums.developer.nvidia.com/t/nvencopenencodesessionex-return-nv-enc-err-unsupported-device-in-rtx5080/379787 "2026-08-11T03:22:50Z")
Hi NV， We using video codec sdk in version 13..1， but nvEncOpenEncodeSessionEx return error(2)，NV\_ENC\_ERR\_UNSUPPORTED\_DEVICE， can you help us solve this problem? GPU driver: 610.43.02 we using ffmpeg and return same e… --- ## [Feature request: expose NV\_ENC\_INITIALIZE\_PARAMS::splitEncodeMode in PyNvVideoCodec](https://forums.developer.nvidia.com/t/feature-request-expose-nv-enc-initialize-params-splitencodemode-in-pynvvideocodec/379399)
**Author:** [@Iablunoshka](https://forums.developer.nvidia.com/u/Iablunoshka)\ **Replies:** 0\ **Last updated:** [August 6, 2026, 11:07pm UTC](https://forums.developer.nvidia.com/t/feature-request-expose-nv-enc-initialize-params-splitencodemode-in-pynvvideocodec/379399 "2026-08-06T23:07:15Z")
Hello, I would like to request exposing NVENC split-frame encoding control through the public PyNvVideoCodec Encoder API. PyNvVideoCodec 2.2.0 already contains everything required internally: the bundled Video Codec … --- ## [NVDEC/cuvid VP8: non-deterministic (byte-different) output for identical WebP stills under concurrent decode (L4, 565.77)](https://forums.developer.nvidia.com/t/nvdec-cuvid-vp8-non-deterministic-byte-different-output-for-identical-webp-stills-under-concurrent-decode-l4-565-77/377802)
**Author:** [@korkimhs](https://forums.developer.nvidia.com/u/korkimhs)\ **Replies:** 2\ **Last updated:** [August 4, 2026, 4:44am UTC](https://forums.developer.nvidia.com/t/nvdec-cuvid-vp8-non-deterministic-byte-different-output-for-identical-webp-stills-under-concurrent-decode-l4-565-77/377802 "2026-08-04T04:44:59Z")
Problem Decoding independent VP8 key frames concurrently on NVDEC produces byte-different output run-to-run for the same input. Sequential (single-thread) decode is always deterministic. The drift appears only when a dec… --- ## [\[D3D11VA/DXVA\] HEVC\_VLD\_Main12 GUID only supports P010, thus losing an extra 2 bits](https://forums.developer.nvidia.com/t/d3d11va-dxva-hevc-vld-main12-guid-only-supports-p010-thus-losing-an-extra-2-bits/373577)
**Author:** [@nyanmisaka](https://forums.developer.nvidia.com/u/nyanmisaka)\ **Replies:** 2\ **Last updated:** [July 27, 2026, 9:28am UTC](https://forums.developer.nvidia.com/t/d3d11va-dxva-hevc-vld-main12-guid-only-supports-p010-thus-losing-an-extra-2-bits/373577 "2026-07-27T09:28:44Z")
As you can see in the image, the HEVC\_VLD\_Main12 GUID only supports P010, thus losing the extra 2 bits provided by Main12. The expected approach is to use P016 as a container of P012. This issue has existed sin… --- ## [NVDEC fails on file: requires (29 + threads) surfaces; thus fails on \>3 threads](https://forums.developer.nvidia.com/t/nvdec-fails-on-file-requires-29-threads-surfaces-thus-fails-on-3-threads/240827)
**Author:** [@val.zapod.vz](https://forums.developer.nvidia.com/u/val.zapod.vz)\ **Replies:** 4\ **Last updated:** [July 27, 2026, 9:03am UTC](https://forums.developer.nvidia.com/t/nvdec-fails-on-file-requires-29-threads-surfaces-thus-fails-on-3-threads/240827 "2026-07-27T09:03:50Z")
Please, Nvidia and its devs, help us fix the bug in ffmpeg, since 4 core CPU already gives by default 5 threads and fails. We have a file that requires at least 30 surfaces for 1 thread. But for 5 threads it is 34 surfac… --- ## [■Too■Many Requests: {"status":429,"title":"Too Many Requests"} \[retrying attemp #2\]](https://forums.developer.nvidia.com/t/too-many-requests-status-429-title-too-many-requests-retrying-attemp-2/378107)
**Author:** [@discordsunuculardepo](https://forums.developer.nvidia.com/u/discordsunuculardepo)\ **Replies:** 0\ **Last updated:** [July 24, 2026, 10:43pm UTC](https://forums.developer.nvidia.com/t/too-many-requests-status-429-title-too-many-requests-retrying-attemp-2/378107 "2026-07-24T22:43:57Z")
1 message = 1 request how? --- ## [NVDEC/cuvid VP8: segment quantizer state leaks across key-frame decodes → silent color corruption when decoding lossy WebP stills (L4, 565.77)](https://forums.developer.nvidia.com/t/nvdec-cuvid-vp8-segment-quantizer-state-leaks-across-key-frame-decodes-silent-color-corruption-when-decoding-lossy-webp-stills-l4-565-77/377800)
**Author:** [@korkimhs](https://forums.developer.nvidia.com/u/korkimhs)\ **Replies:** 0\ **Last updated:** [July 23, 2026, 1:41am UTC](https://forums.developer.nvidia.com/t/nvdec-cuvid-vp8-segment-quantizer-state-leaks-across-key-frame-decodes-silent-color-corruption-when-decoding-lossy-webp-stills-l4-565-77/377800 "2026-07-23T01:41:32Z")
Problem : A WebP whose VP8 key frame enables segmentation but doesn’t re-transmit all per-segment quantizers decodes differently depending on the previously decoded WebP — so an independent still image is not decoded ind… --- ## [NVENC: Should I create a separate thread to flush the generated bitstream?](https://forums.developer.nvidia.com/t/nvenc-should-i-create-a-separate-thread-to-flush-the-generated-bitstream/377092)
**Author:** [@diederick](https://forums.developer.nvidia.com/u/diederick)\ **Replies:** 0\ **Last updated:** [July 16, 2026, 7:55pm UTC](https://forums.developer.nvidia.com/t/nvenc-should-i-create-a-separate-thread-to-flush-the-generated-bitstream/377092 "2026-07-16T19:55:02Z")
I’m reading the NVENC Programmer’s Guide and trying to correctly implement the recommendation from Section 6.3: Threading Model. The guide recommends using a dedicated thread that calls NvEncLockBitstream() and NvEncUnl… --- ## [Latest RTX Video SDK 1.1.0 incompatible with CUDA 13.3](https://forums.developer.nvidia.com/t/latest-rtx-video-sdk-1-1-0-incompatible-with-cuda-13-3/377029)
**Author:** [@dim\_kar](https://forums.developer.nvidia.com/u/dim_kar)\ **Replies:** 0\ **Last updated:** [July 16, 2026, 8:15am UTC](https://forums.developer.nvidia.com/t/latest-rtx-video-sdk-1-1-0-incompatible-with-cuda-13-3/377029 "2026-07-16T08:15:03Z")
Hello! I tried to use RTX Video SDK 1.1.0 to implement VSR. Unfortunately because I use CUDA 13.3 I have a crash. I have implemented a workaround that I will explain below, but normall it should not be needed. Summary N… --- ## [PyNvVideoCodec SimpleDecoder crashes on certain videos](https://forums.developer.nvidia.com/t/pynvvideocodec-simpledecoder-crashes-on-certain-videos/360454)
**Author:** [@felix.ulomek](https://forums.developer.nvidia.com/u/felix.ulomek)\ **Replies:** 5\ **Last updated:** [July 8, 2026, 11:28am UTC](https://forums.developer.nvidia.com/t/pynvvideocodec-simpledecoder-crashes-on-certain-videos/360454 "2026-07-08T11:28:08Z")
On some files PyNvVideoCodec SimpleDecoder crashes. No error output at all. In the below example directly, for other video files at some frame. Most video files work fine. The worst thing is that there seems no way to c… --- ## [PyNvVideoCodec library process crash with floating point exception](https://forums.developer.nvidia.com/t/pynvvideocodec-library-process-crash-with-floating-point-exception/363773)
**Author:** [@zia.badar](https://forums.developer.nvidia.com/u/zia.badar)\ **Replies:** 3\ **Last updated:** [July 8, 2026, 9:37am UTC](https://forums.developer.nvidia.com/t/pynvvideocodec-library-process-crash-with-floating-point-exception/363773 "2026-07-08T09:37:57Z")
Hello, I am facing PyNvVideoCodec library crash on video reading with floating point exception. This is happening on only particular video and on only linux. I have attached the test script, video file. toolkit: NVIDIA … --- ## [\[D3D11VA/DXVA\] H264\_VLD\_NoFGT GUID has no High10/High422 support on Blackwell GPU](https://forums.developer.nvidia.com/t/d3d11va-dxva-h264-vld-nofgt-guid-has-no-high10-high422-support-on-blackwell-gpu/373578)
**Author:** [@nyanmisaka](https://forums.developer.nvidia.com/u/nyanmisaka)\ **Replies:** 1\ **Last updated:** [July 3, 2026, 10:57pm UTC](https://forums.developer.nvidia.com/t/d3d11va-dxva-h264-vld-nofgt-guid-has-no-high10-high422-support-on-blackwell-gpu/373578 "2026-07-03T22:57:33Z")
Blackwell GPUs’ NVDEC brings support for up to H.264 8K High10/High422 profiles. However, the H.264\_VLD\_NoFGT GUID does not report any support for P010, YUY2, and Y210 pixel formats. Please consider adding these, … --- ## [How to display CUDA AVFrame on Egl surface](https://forums.developer.nvidia.com/t/how-to-display-cuda-avframe-on-egl-surface/375480)
**Author:** [@EugeneForce25](https://forums.developer.nvidia.com/u/EugeneForce25)\ **Replies:** 0\ **Last updated:** [July 3, 2026, 5:02pm UTC](https://forums.developer.nvidia.com/t/how-to-display-cuda-avframe-on-egl-surface/375480 "2026-07-03T17:02:20Z")
I have setup ffmpeg to decode some video using NVDEC: // Allocate hardware device context AVBufferRef \*hw\_device\_ctx = nullptr; int err = av\_hwdevice\_ctx\_create(&hw\_device\_ctx, AV\_HWDEVICE\_TYPE\_CUDA, … --- ## [YUV422@8bit UYVY相机无法使用](https://forums.developer.nvidia.com/t/yuv422-8bit-uyvy/374189)
**Author:** [@1725941956](https://forums.developer.nvidia.com/u/1725941956)\ **Replies:** 0\ **Last updated:** [June 23, 2026, 3:20am UTC](https://forums.developer.nvidia.com/t/yuv422-8bit-uyvy/374189 "2026-06-23T03:20:59Z")
摄像头： YUV422-8bit，UYVY，1920\*1536 相机我之前适配的24lane的时候能够正常使用 当我改成4\*2lane的时候会有如下报错 kworker/4:1-107 \[004\] … 45.902726: rtcpu\_nvcsi\_intr: tstamp:2171067468 class:CORRECTABLE\_ERR type:PHY\_INTR phy:0 cil:0 st:0 vc:0 stat… --- ## [The latest Linux drivers have issues when decoding MPEG-2 videos via CUVID](https://forums.developer.nvidia.com/t/the-latest-linux-drivers-have-issues-when-decoding-mpeg-2-videos-via-cuvid/373213)
**Author:** [@elite\_jwp](https://forums.developer.nvidia.com/u/elite_jwp)\ **Replies:** 0\ **Last updated:** [June 13, 2026, 7:45am UTC](https://forums.developer.nvidia.com/t/the-latest-linux-drivers-have-issues-when-decoding-mpeg-2-videos-via-cuvid/373213 "2026-06-13T07:45:18Z")
I use the latest Linux driver and CUVID to decode MPEG-2 videos, but the decoded images are abnormal. Operating environment: OS: KylinOS V10 Desktop Graphics card: RTX 5080 Driver version: 595.58.03 CUDA version: 12.9… [Next page](https://forums.developer.nvidia.com/c/gaming-and-visualization-technologies/video-processing-optical-flow/189.md?page=1)