Re: [ANN] Media Summit on May 26th in Nice, France

Re: [ANN] Media Summit on May 26th in Nice, France

[Hans Verkuil]

Hi all,

A gentle reminder to let me know by email if you will join this year's Media Summit.
I only received 7 confirmations until now, so there is room for quite a few more.

Also, please reply to this email if you have topics that you would like to discuss.
Just 'Reply All' to this announcement and give the topic title, a short description and
a guesstimate of the time you need for your topic.

And here is my topic:

Title: Discussion of the media subsystem development process

Description: Review of the multi-committer model: current status and next steps.
Are there any bottlenecks, any ideas for improvements, w.r.t. the development process?

Guesstimate: 1 hour

Regards,

	Hans

On 16/01/2026 14:29, Hans Verkuil wrote:
> (Please pass this on to anyone you think might be interested in this!)
> 
> Hi all,
> 
> This year's Media Summit will be held on Tuesday May 26th the day before the
> Embedded Recipes Conference in Nice, France:
> 
> https://embedded-recipes.org/2026/
> 
> The Media Summit will be held at Hotel Campanile and in the same meeting room
> as last year (Nikaia):
> 
> https://nice-aeroport.campanile.com/en-us/
> 
> It is close to the Airport and to the Embedded Recipes venue.
> 
> The meeting room can hold up to 30 people and I will provide video conferencing support,
> just like last year. The location and the meeting room was quite nice last year, so
> I saw no need to change it.
> 
> That said, in-person participation is very much preferred. This yearly summit is meant
> for active media developers to meet face-to-face and to discuss media subsystem issues.
> 
> And it is also a good opportunity to talk to each other during the Embedded Recipes
> conference to discuss topics in a smaller group. But if you are an active media developer
> and are really not able to attend in person, then remote participation is an option.
> 
> If you want to attend the meeting (either in person or remote), then send an email to me
> directly. The deadline for in-person attendance is May 14 as the hotel needs to know the
> final number of attendees by then.
> 
> There is no registration fee, the meeting room is sponsored by Cisco and Collabora, and
> the lunch is sponsored by Ideas on Board! Many thanks to our sponsors, it's very much
> appreciated.
> 
> If you have a topic that you want to discuss, just 'Reply All' to this announcement
> and give the topic title, a short description and a guesstimate of the time you need
> for your topic.
> 
> See last year's Media Summit Report as an example of what to expect:
> 
> https://lore.kernel.org/linux-media/21769183-ca57-4f8f-818a-6a1ad089298d@jjverkuil.nl/
> 
> This announcement goes out quite early for once, usually it takes a lot longer
> to organize, but having it in the same place as before made life so much easier.
> 
> Regards,
> 
> 	Hans
> 
> PS: Be aware that May 24 and 25 are public holidays in France. So many shops may be
> closed those days.
> 

Re: [ANN] Media Summit on May 26th in Nice, France

[Laurent Pinchart]

On Mon, Feb 23, 2026 at 10:12:12AM +0100, Hans Verkuil wrote:
> Hi all,
> 
> A gentle reminder to let me know by email if you will join this year's Media Summit.
> I only received 7 confirmations until now, so there is room for quite a few more.
> 
> Also, please reply to this email if you have topics that you would like to discuss.
> Just 'Reply All' to this announcement and give the topic title, a short description and
> a guesstimate of the time you need for your topic.

If there's an interest, I can present a summary of the ISP development
efforts since the last media summit.

Title: Status of ISP support in V4L2

Description: Summary of ISP-related development in V4L2 since the last
Linux Media Summit. This includes a brief overview of technical
developments, and a summary of the efforts to engage with vendors.

Time estimate: 15 minutes


I would also like to revive efforts to properly support dmabuf import
for multi-planar formats with configurable plane offsets (a.k.a. data
offsets), but I think this requires a champion to resume the work more
than a discussion at the media summit.

> And here is my topic:
> 
> Title: Discussion of the media subsystem development process
> 
> Description: Review of the multi-committer model: current status and next steps.
> Are there any bottlenecks, any ideas for improvements, w.r.t. the development process?
> 
> Guesstimate: 1 hour
> 
> Regards,
> 
> 	Hans
> 
> On 16/01/2026 14:29, Hans Verkuil wrote:
> > (Please pass this on to anyone you think might be interested in this!)
> > 
> > Hi all,
> > 
> > This year's Media Summit will be held on Tuesday May 26th the day before the
> > Embedded Recipes Conference in Nice, France:
> > 
> > https://embedded-recipes.org/2026/
> > 
> > The Media Summit will be held at Hotel Campanile and in the same meeting room
> > as last year (Nikaia):
> > 
> > https://nice-aeroport.campanile.com/en-us/
> > 
> > It is close to the Airport and to the Embedded Recipes venue.
> > 
> > The meeting room can hold up to 30 people and I will provide video conferencing support,
> > just like last year. The location and the meeting room was quite nice last year, so
> > I saw no need to change it.
> > 
> > That said, in-person participation is very much preferred. This yearly summit is meant
> > for active media developers to meet face-to-face and to discuss media subsystem issues.
> > 
> > And it is also a good opportunity to talk to each other during the Embedded Recipes
> > conference to discuss topics in a smaller group. But if you are an active media developer
> > and are really not able to attend in person, then remote participation is an option.
> > 
> > If you want to attend the meeting (either in person or remote), then send an email to me
> > directly. The deadline for in-person attendance is May 14 as the hotel needs to know the
> > final number of attendees by then.
> > 
> > There is no registration fee, the meeting room is sponsored by Cisco and Collabora, and
> > the lunch is sponsored by Ideas on Board! Many thanks to our sponsors, it's very much
> > appreciated.
> > 
> > If you have a topic that you want to discuss, just 'Reply All' to this announcement
> > and give the topic title, a short description and a guesstimate of the time you need
> > for your topic.
> > 
> > See last year's Media Summit Report as an example of what to expect:
> > 
> > https://lore.kernel.org/linux-media/21769183-ca57-4f8f-818a-6a1ad089298d@jjverkuil.nl/
> > 
> > This announcement goes out quite early for once, usually it takes a lot longer
> > to organize, but having it in the same place as before made life so much easier.
> > 
> > Regards,
> > 
> > 	Hans
> > 
> > PS: Be aware that May 24 and 25 are public holidays in France. So many shops may be
> > closed those days.

-- 
Regards,

Laurent Pinchart

Re: [ANN] Media Summit on May 26th in Nice, France

[Nicolas Dufresne]

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Hi,

Le dimanche 01 mars 2026 à 16:02 +0100, Laurent Pinchart a écrit :
> I would also like to revive efforts to properly support dmabuf import
> for multi-planar formats with configurable plane offsets (a.k.a. data
> offsets), but I think this requires a champion to resume the work more
> than a discussion at the media summit.

I haven't sent my RFC yet about that subject, that will probably be after
Embedded World. But I think it can serve as example of "possible" way forward.
And I believe the ChromeOS request should be cited. I think we need more then a
champion to resume the work, since I personally don't believe in the ancient
proposal from Collabora. I'd say plan for a little more time on this subject.

If possible, I would like to add to the agenda a short update related to Vulkan
Video side of CODECs, what are the viable options for Linux Media and what is in
preparation outside of our subsystem. The second aspect is informative as these
discussion don't seem to lean toward our subsystem as the foundation. But I
think its rather useful for everyone to understand why and what is included.

regards,
Nicolas

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Re: [ANN] Media Summit on May 26th in Nice, France

[Laurent Pinchart]

On Mon, Mar 02, 2026 at 08:55:05AM -0500, Nicolas Dufresne wrote:
> Hi,
> 
> Le dimanche 01 mars 2026 à 16:02 +0100, Laurent Pinchart a écrit :
> > I would also like to revive efforts to properly support dmabuf import
> > for multi-planar formats with configurable plane offsets (a.k.a. data
> > offsets), but I think this requires a champion to resume the work more
> > than a discussion at the media summit.
> 
> I haven't sent my RFC yet about that subject, that will probably be after
> Embedded World. But I think it can serve as example of "possible" way forward.
> And I believe the ChromeOS request should be cited. I think we need more then a
> champion to resume the work, since I personally don't believe in the ancient
> proposal from Collabora. I'd say plan for a little more time on this subject.

Maybe it could then make sense to brainstorm the topic during the media
summit.

> If possible, I would like to add to the agenda a short update related to Vulkan
> Video side of CODECs, what are the viable options for Linux Media and what is in
> preparation outside of our subsystem. The second aspect is informative as these
> discussion don't seem to lean toward our subsystem as the foundation. But I
> think its rather useful for everyone to understand why and what is included.

I'd be interested in hearing about that.

-- 
Regards,

Laurent Pinchart

Re: [ANN] Media Summit on May 26th in Nice, France

[Paul Kocialkowski]

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Hi,

On Mon 02 Mar 26, 15:01, Laurent Pinchart wrote:
> On Mon, Mar 02, 2026 at 08:55:05AM -0500, Nicolas Dufresne wrote:
> > Le dimanche 01 mars 2026 à 16:02 +0100, Laurent Pinchart a écrit :
> > > I would also like to revive efforts to properly support dmabuf import
> > > for multi-planar formats with configurable plane offsets (a.k.a. data
> > > offsets), but I think this requires a champion to resume the work more
> > > than a discussion at the media summit.
> > 
> > I haven't sent my RFC yet about that subject, that will probably be after
> > Embedded World. But I think it can serve as example of "possible" way forward.
> > And I believe the ChromeOS request should be cited. I think we need more then a
> > champion to resume the work, since I personally don't believe in the ancient
> > proposal from Collabora. I'd say plan for a little more time on this subject.
> 
> Maybe it could then make sense to brainstorm the topic during the media
> summit.

I'm also interested in the topic and had a first go at it a few months back,
with code at: https://git.paulk.fr/projects/linux.git/log/?h=media/dmabuf-offset

This is based on our discussions on IRC, with the main concern that hardware
units may have specific alignment constraints that apply, so not all offsets
are valid and drivers need to provide their alignment constraints. So the
feature is disabled by default and drivers that want to support it need to
provide their alignment constraint. It is then reported to userspace via
create_buffers and a new flag is added to indicate that the driver supports
the feature.

Then it comes down to adding the offset down to videobuf2, which is
straightforward in some cases (that I implemented) and less so in others, like
sg tables (which I didn't implement).

So it feels like more work would be needed to get the vb2 side right.

Nicolas, did you have another approach in mind or is your RFC based on the same
ideas?

> > If possible, I would like to add to the agenda a short update related to Vulkan
> > Video side of CODECs, what are the viable options for Linux Media and what is in
> > preparation outside of our subsystem. The second aspect is informative as these
> > discussion don't seem to lean toward our subsystem as the foundation. But I
> > think its rather useful for everyone to understand why and what is included.
> 
> I'd be interested in hearing about that.

Yes me too. I guess this more or less boils down to the long-time debate of
generic uAPI with complexity in the kernel vs driver-specific uAPI with
complexity in userspace. I still think a generic uAPI for codecs makes good
sense, but I understand the appeal of something more similar to drm accel.

All the best,

Paul

-- 
Paul Kocialkowski,

Independent contractor - sys-base - https://www.sys-base.io/
Free software developer - https://www.paulk.fr/

Expert in multimedia, graphics and embedded hardware support with Linux.

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Re: [ANN] Media Summit on May 26th in Nice, France

[Paul Kocialkowski]

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Hi Hans,

On Mon 23 Feb 26, 10:12, Hans Verkuil wrote:
> A gentle reminder to let me know by email if you will join this year's Media Summit.
> I only received 7 confirmations until now, so there is room for quite a few more.

I would like to attend as well, and sorry for the delay!

> Also, please reply to this email if you have topics that you would like to discuss.
> Just 'Reply All' to this announcement and give the topic title, a short description and
> a guesstimate of the time you need for your topic.

I'd like to give an update about the stateless video encoding uAPI, which is
still in preparation (but may have a first version on the list before the media
summit).

Title: V4L2 Stateless Video Encoding uAPI Progress Update

Description: An update on the ongonig work to support stateless codecs in V4L2.
Some of the remaining open topics will be presented and discussed.

Guesstimate: 1 hour

All the best,

Paul

> And here is my topic:
> 
> Title: Discussion of the media subsystem development process
> 
> Description: Review of the multi-committer model: current status and next steps.
> Are there any bottlenecks, any ideas for improvements, w.r.t. the development process?
> 
> Guesstimate: 1 hour
> 
> Regards,
> 
> 	Hans
> 
> On 16/01/2026 14:29, Hans Verkuil wrote:
> > (Please pass this on to anyone you think might be interested in this!)
> > 
> > Hi all,
> > 
> > This year's Media Summit will be held on Tuesday May 26th the day before the
> > Embedded Recipes Conference in Nice, France:
> > 
> > https://embedded-recipes.org/2026/
> > 
> > The Media Summit will be held at Hotel Campanile and in the same meeting room
> > as last year (Nikaia):
> > 
> > https://nice-aeroport.campanile.com/en-us/
> > 
> > It is close to the Airport and to the Embedded Recipes venue.
> > 
> > The meeting room can hold up to 30 people and I will provide video conferencing support,
> > just like last year. The location and the meeting room was quite nice last year, so
> > I saw no need to change it.
> > 
> > That said, in-person participation is very much preferred. This yearly summit is meant
> > for active media developers to meet face-to-face and to discuss media subsystem issues.
> > 
> > And it is also a good opportunity to talk to each other during the Embedded Recipes
> > conference to discuss topics in a smaller group. But if you are an active media developer
> > and are really not able to attend in person, then remote participation is an option.
> > 
> > If you want to attend the meeting (either in person or remote), then send an email to me
> > directly. The deadline for in-person attendance is May 14 as the hotel needs to know the
> > final number of attendees by then.
> > 
> > There is no registration fee, the meeting room is sponsored by Cisco and Collabora, and
> > the lunch is sponsored by Ideas on Board! Many thanks to our sponsors, it's very much
> > appreciated.
> > 
> > If you have a topic that you want to discuss, just 'Reply All' to this announcement
> > and give the topic title, a short description and a guesstimate of the time you need
> > for your topic.
> > 
> > See last year's Media Summit Report as an example of what to expect:
> > 
> > https://lore.kernel.org/linux-media/21769183-ca57-4f8f-818a-6a1ad089298d@jjverkuil.nl/
> > 
> > This announcement goes out quite early for once, usually it takes a lot longer
> > to organize, but having it in the same place as before made life so much easier.
> > 
> > Regards,
> > 
> > 	Hans
> > 
> > PS: Be aware that May 24 and 25 are public holidays in France. So many shops may be
> > closed those days.
> > 
> 

-- 
Paul Kocialkowski,

Independent contractor - sys-base - https://www.sys-base.io/
Free software developer - https://www.paulk.fr/

Expert in multimedia, graphics and embedded hardware support with Linux.

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