AV1 Discussion

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Public Discussion of the Alliance for Open Media's AV1 Video Codec.

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Olzhas Alexandrov, … Converter18

Jan 11

PNG to AVIF results in larger file size w/ slower speed

This looks more like an encoder behavior than a real bug. With AVIF, a lower speed value does not

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PNG to AVIF results in larger file size w/ slower speed

This looks more like an encoder behavior than a real bug. With AVIF, a lower speed value does not

Jan 11

Gabe Kontros

Jan 1

Lossy compression faster than fourier transform based methods at similar ratios.

I'm not sure how this discussion page works. I've made a lossy compression algorithm that

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Lossy compression faster than fourier transform based methods at similar ratios.

I'm not sure how this discussion page works. I've made a lossy compression algorithm that

Jan 1

keys...@keys.openpgp.org

12/29/25

Your key upload on keys.openpgp.org

Hi, This is an automated message from keys.openpgp.org. If you didn't upload your key there,

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Your key upload on keys.openpgp.org

Hi, This is an automated message from keys.openpgp.org. If you didn't upload your key there,

12/29/25

Haseeb Abdul Qadir, Marco Paniconi4

11/11/25

Active map regions skipped when zero-MV heuristic triggers in real-time encodes

Great, the patch is uploaded here: https://aomedia-review.googlesource.com/c/aom/+/204421 On Tue, Nov

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Active map regions skipped when zero-MV heuristic triggers in real-time encodes

Great, the patch is uploaded here: https://aomedia-review.googlesource.com/c/aom/+/204421 On Tue, Nov

11/11/25

Sungjoon Moon, Pierre-Anthony Lemieux2

9/9/25

Argon stream download link is not working anymore

The links at [1] have been updated. [1] https://aomedia.org/av1-video-decoder-verification-tool/ On

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Argon stream download link is not working anymore

The links at [1] have been updated. [1] https://aomedia.org/av1-video-decoder-verification-tool/ On

9/9/25

Wan-Teh Chang

9/3/25

libaom v3.13.0 Opaline Released

libaom v3.13.0 Opaline has been released. The source code of the release can be checked out from the

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libaom v3.13.0 Opaline Released

libaom v3.13.0 Opaline has been released. The source code of the release can be checked out from the

9/3/25

Wan-Teh Chang

8/28/25

libaom v3.13.0 release candidate 1

Hi everyone, libaom v3.13.0 release candidate 1 is available. The release tag is v3.13.0-rc1. Your

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libaom v3.13.0 release candidate 1

Hi everyone, libaom v3.13.0 release candidate 1 is available. The release tag is v3.13.0-rc1. Your

8/28/25

JesusGod-Pope666.Info, James Zern8

8/11/25

Hi there.

On Sun, Aug 10, 2025 at 2:46 PM JesusGod-Pope666.Info <paven...@gmail.com> wrote: So

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Hi there.

On Sun, Aug 10, 2025 at 2:46 PM JesusGod-Pope666.Info <paven...@gmail.com> wrote: So

8/11/25

klaus zhang, Marco Paniconi3

6/5/25

Is this a right way to acheive LTR in av1

Thanks for your reply! I've applied the new code 1. patch you uploaded 2. change cpu speed from 9

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Is this a right way to acheive LTR in av1

Thanks for your reply! I've applied the new code 1. patch you uploaded 2. change cpu speed from 9

6/5/25

klaus zhang, Marco Paniconi6

5/30/25

How can I implement the long time reference mechanism for AV1 in RTC mode?

Thank you so much! It works now. On Friday, May 30, 2025 at 6:11:42 AM UTC+8 Marco Paniconi wrote:

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How can I implement the long time reference mechanism for AV1 in RTC mode?

Thank you so much! It works now. On Friday, May 30, 2025 at 6:11:42 AM UTC+8 Marco Paniconi wrote:

5/30/25

Wan-Teh Chang

5/9/25

libavif v1.3.0 release

Hello everyone, libavif v1.3.0 has been released. The source code of the release can be checked out

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libavif v1.3.0 release

Hello everyone, libavif v1.3.0 has been released. The source code of the release can be checked out

5/9/25

Aaron Franke, Aous Naman2

5/1/25

Multi-dimensional image format

Hi Aaron, For volumetric data, JPEG 2000 offers two coding solutions, these being 1) Multi-Component

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Multi-dimensional image format

Hi Aaron, For volumetric data, JPEG 2000 offers two coding solutions, these being 1) Multi-Component

5/1/25

Liat Hoffman

4/16/25

Offer: Free Hosting and Compute for Alliance for Open Media — Powered by DevOpser

Hi OAM Technical Steering Committee, Nirav Patel, CTO of Linux Foundation let me know that I should

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Offer: Free Hosting and Compute for Alliance for Open Media — Powered by DevOpser

Hi OAM Technical Steering Committee, Nirav Patel, CTO of Linux Foundation let me know that I should

4/16/25

Wan-Teh Chang

4/14/25

libaom v3.12.1 Released

Hello everyone, libaom v3.12.1 has been released. This is a bug-fix patch release for libaom v3.12.0.

unread,

libaom v3.12.1 Released

Hello everyone, libaom v3.12.1 has been released. This is a bug-fix patch release for libaom v3.12.0.

4/14/25

Wan-Teh Chang

4/11/25

libaom v3.12.1 release candidate 1

Hi everyone, libaom v3.12.1 release candidate 1 is available. The release tag is v3.12.1-rc1. Your

unread,

libaom v3.12.1 release candidate 1

Hi everyone, libaom v3.12.1 release candidate 1 is available. The release tag is v3.12.1-rc1. Your

4/11/25

Yannis Guyon

3/18/25

libavif v1.2.1 release

Hello everyone, libavif v1.2.1 has been released. The source code of the release can be checked out

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libavif v1.2.1 release

Hello everyone, libavif v1.2.1 has been released. The source code of the release can be checked out

3/18/25

Wan-Teh Chang

2/10/25

libaom v3.12.0 North Star Released

libaom v3.12.0 North Star has been released. The source code of the release can be checked out from

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libaom v3.12.0 North Star Released

libaom v3.12.0 North Star has been released. The source code of the release can be checked out from

2/10/25

Pablo De Chiaro R., … Wan-Teh Chang3

2/8/25

aomenc 3.11.0-149-gd032a4f339 - partition debug

On Fri, Feb 7, 2025 at 11:30 AM 'James Zern' via AV1 Discussion <av1-d...@aomedia.org

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aomenc 3.11.0-149-gd032a4f339 - partition debug

On Fri, Feb 7, 2025 at 11:30 AM 'James Zern' via AV1 Discussion <av1-d...@aomedia.org

2/8/25

Wan-Teh Chang

2/7/25

libaom v3.12.0 release candidate 1

Hi everyone, libaom v3.12.0 release candidate 1 is available. The release tag is v3.12.0-rc1. Your

unread,

libaom v3.12.0 release candidate 1

Hi everyone, libaom v3.12.0 release candidate 1 is available. The release tag is v3.12.0-rc1. Your

2/7/25

Jerome Jiang

11/14/24

libaom v3.11.0 Minty Released

libaom v3.11.0 Minty has been released. The source code of the release can be checked out from the

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libaom v3.11.0 Minty Released

libaom v3.11.0 Minty has been released. The source code of the release can be checked out from the

11/14/24

Jerome Jiang

10/31/24

libaom v3.11.0 release candidate 1

Hi everyone, libaom v3.11.0 release candidate 1 is available. The release tag is v3.11.0-rc1. Your

unread,

libaom v3.11.0 release candidate 1

Hi everyone, libaom v3.11.0 release candidate 1 is available. The release tag is v3.11.0-rc1. Your

10/31/24

Haseeb Abdul Qadir, Marco Paniconi6

10/15/24

VBR encoding fails to adapt QP, causing overshoots with Screen Content + Speed 11 + AQ Cyclical Refresh

Hi Marco, I tested it and I can confirm that your fix is working great. I can no longer reproduce the

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VBR encoding fails to adapt QP, causing overshoots with Screen Content + Speed 11 + AQ Cyclical Refresh

Hi Marco, I tested it and I can confirm that your fix is working great. I can no longer reproduce the

10/15/24

Wan-Teh Chang

8/29/24

libaom v3.10.0 Luna Released

libaom v3.10.0 Luna has been released. The source code of the release can be checked out from the git

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libaom v3.10.0 Luna Released

libaom v3.10.0 Luna has been released. The source code of the release can be checked out from the git

8/29/24

Wan-Teh Chang

8/26/24

libaom v3.10.0 release candidate 1

Hi everyone, libaom v3.10.0 release candidate 1 is available. The release tag is v3.10.0-rc1. Your

unread,

libaom v3.10.0 release candidate 1

Hi everyone, libaom v3.10.0 release candidate 1 is available. The release tag is v3.10.0-rc1. Your

8/26/24

Haseeb Abdul Qadir, Marco Paniconi2

8/12/24

Libaom: Crash in estimate_scroll_motion when bit depth = 10bit

Hi Haseeb, Thanks for the testing and finding this issue. Quick fix is uploaded here: https://aomedia

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Libaom: Crash in estimate_scroll_motion when bit depth = 10bit

Hi Haseeb, Thanks for the testing and finding this issue. Quick fix is uploaded here: https://aomedia

8/12/24

Wan-Teh Chang

7/30/24

libavif v1.1.1 release

Hello everyone, libavif v1.1.1 has been released. The source code of the release can be checked out

unread,

libavif v1.1.1 release

Hello everyone, libavif v1.1.1 has been released. The source code of the release can be checked out

7/30/24

Wan-Teh Chang

7/15/24

libavif v1.1.0 release

Hello everyone, libavif v1.1.0 has been released. The source code of the release can be checked out

unread,

libavif v1.1.0 release

Hello everyone, libavif v1.1.0 has been released. The source code of the release can be checked out

7/15/24

Sachin Pandhare, James Zern2

6/26/24

Query about AV1CodecConfigurationRecord in mp4

Hi, On Wed, Jun 26, 2024 at 8:17 AM Sachin Pandhare <sachinp...@gmail.com> wrote: We are

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Query about AV1CodecConfigurationRecord in mp4

Hi, On Wed, Jun 26, 2024 at 8:17 AM Sachin Pandhare <sachinp...@gmail.com> wrote: We are

6/26/24

James Zern2

6/13/24

AOMedia Issue Tracker migration starts now

This is complete. The new tracker is live at https://aomedia.issues.chromium.org/. Old bug links will

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AOMedia Issue Tracker migration starts now

This is complete. The new tracker is live at https://aomedia.issues.chromium.org/. Old bug links will

6/13/24

Wan-Teh Chang

6/11/24

libaom v3.8.3 Released

Hello everyone, libaom v3.8.3 has been released. This is a bug-fix patch release for libaom v3.8.0.

unread,

libaom v3.8.3 Released

Hello everyone, libaom v3.8.3 has been released. This is a bug-fix patch release for libaom v3.8.0.

6/11/24