media-workshop

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Fwd: Presentation
by Hans Verkuil 13 Oct '14

13 Oct '14

Forwarded on behalf of Ricardo. -------- Forwarded Message -------- Subject: Presentation Date: Mon, 13 Oct 2014 12:16:33 +0200 From: Ricardo Ribalda Delgado <ricardo.ribalda(a)gmail.com> To: Hans Verkuil <hverkuil(a)xs4all.nl>

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[ANN] Revised agenda for the media summit
by Hans Verkuil 11 Oct '14

11 Oct '14

Here is the revised final (?) agenda for the media summit next week. There are quite a few changes in the schedule due to the 'DVB API improvement' topic that had to be moved to Thursday morning. Attendees ========= Mauro Caralho Chehab Hans Verkuil Laurent Pinchart Hans de Goede Sakari Ailus Pawel Osciak Chris Kohn Philipp Zabel Nicolas Dufresne Mike Krufky Julien Beraud Ralph Metzler Guennadi Liakhovetski Ricardo Ribalda Delgado Johannes Stezenbach Henning Garbers Friedrich Schwittay Brad Love Kamil Debski Agenda ====== Some notes: - times are approximate, usually some topics will take longer than expected, while others are done quicker than expected. It tends to average out. - we have one hour available at the end of the day on Friday for any remaining discussions, or if things take longer than expected. - it's a full agenda, so please be on time and come prepared if you present a topic. - The breaks are outside room 11, lunch is in the Wintergarten. - The room where we have our mini-summit is not yet known. Thursday -------- 09:00-09:30 Get laptops/wireless working :-) followed by an introduction. 09:30-09:45 Hans: configuration stores: current status 09:45-11:00 Sakari: Android camera HAL API v3 and what kind of requirements it brings to V4L2. 11:00-11:30 Break 11:30-11:45 Sakari: continuation of Android camera HAL topic 11:45-12:45 Mauro: DVB API improvements, including improvements at demod API (mmap, DMABUF, multiple filter support) and other improvements, like support for DVB-C2 and other newer standards. 12:45-14:00 Lunch 14:00-14:15 Hans: Media development process: what works, what doesn't. 14:15-14:30 Ricardo: Multiple timestamps per buffer 14:30-14:45 Pawel: A proposal for a new codec API extension/mode for HW codecs that can't parse elementary streams 14:45-15:30 Pawel: Existing codec API ambiguities, this includes related topics from: Philip Zabel: Helping userspace to use mem2mem devices; clarification of encoder/decoder handling, clarification of format/size setting in case of dependencies between input and output formats, possibly broad categorisation of mem2mem devices (encoder, decoder, scaler, rotator, csc/filter, ...) Nicolas Dufresne: discuss frame size enumeration for scaling m2m (e.g. fimc/gscaler and CUDA decoder). 15:30-16:00 Break 16:00-17:00 Pawel/Philip/Nicolas: continuation of codec API topic Friday ------ 09:00-10:00 Laurent & Chris Kohn: runtime reconfiguration of pipelines 10:00-10:15 Hans: create virtual complex omap3-like driver: what is needed 10:15-10:30 Philip Zabel: Hierarchical media devices - what if you have a lot of media entities and some of them are more closely related to each other than others. 10:30-11:00 Break 11:00-12:00 Julien Beraud: Highly reconfigurable hardware devices and the possibility to create media-links and virtual subdevices in order to simplify userland vision. 12:00-13:00 Lunch 13:00-13:30 Mauro: a short presentation about libdvbv5 and suggestions to improve. 13:30-15:00 Mauro: The new tuner binding model and how to couple it to the media controller API for DVB. 15:00-15:30 Break 15:30-16:00 Ricardo: multi selections and dead pixel api 16:00-16:30 Hans: A presentation on colorspaces. What is a colorspace, why does it matter, and what is needed to improve colorspace support in V4L2. 16:40-17:30 TBD Regards, Hans Verkuil _______________________________________________ media-workshop mailing list media-workshop(a)linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/media-workshop

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Notes for my 'Media development process' topic
by Hans Verkuil 11 Oct '14

11 Oct '14

It'll be just a quick discussion on what works and what doesn't in our media development process. My opinion is that it works fine for the most part (from my perspective), except that it takes too long for fixes for the current rc kernel to get pushed upstream. Experience shows that most bugs are fixed early on in the cycle, usually before rc2 is released, so I think it would be very helpful if fixes are upstreamed in time for rc2 or rc3 at the latest. The other thing I'd like to discuss is whether we should do a media summit in the future that does not overlap with an ELC/LPC/gstreamer conference. This would make scheduling much easier, but it would mean that we have a weekend between the conference(s) and the summit. Regards, Hans

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[ANN] Agenda for the media summit
by Hans Verkuil 10 Oct '14

10 Oct '14

Here is the final (?) agenda for the media summit next week. Attendees ========= Mauro Caralho Chehab Hans Verkuil Laurent Pinchart Hans de Goede Sakari Ailus Pawel Osciak Chris Kohn Philipp Zabel Nicolas Dufresne Mike Krufky Julien Beraud Ralph Metzler Guennadi Liakhovetski Ricardo Ribalda Delgado Johannes Stezenbach Henning Garbers Friedrich Schwittay Brad Love Agenda ====== Some notes: - times are approximate, usually some topics will take longer than expected, while others are done quicker than expected. It tends to average out. - we have two hours available at the end of the day on Friday for any remaining discussions, or if things take longer than expected. - it's a full agenda, so please be on time and come prepared if you present a topic. Thursday -------- 09:00-09:30 Get laptops/wireless working :-) followed by an introduction. 09:30-09:45 Hans: Media development process: what works, what doesn't. 09:45-10:00 Ricardo: Multiple timestamps per buffer 10:00-10:30 Ricardo: multi selections and dead pixel api 10:30-11:00 Hans: A presentation on colorspaces. What is a colorspace, why does it matter, and what is needed to improve colorspace support in V4L2. 11:00-11:30 Break 11:30-11:45 Hans: configuration stores: current status 11:45-12:00 Pawel: A proposal for a new codec API extension/mode for HW codecs that can't parse elementary streams 12:00-12:45 Sakari: Android camera HAL API v3 and what kind of requirements it brings to V4L2. 12:45-14:00 Lunch 14:00-14:45 Sakari: continuation of Android camera HAL topic 14:45-15:30 Pawel: Existing codec API ambiguities, this includes related topics from: Philip Zabel: Helping userspace to use mem2mem devices; clarification of encoder/decoder handling, clarification of format/size setting in case of dependencies between input and output formats, possibly broad categorisation of mem2mem devices (encoder, decoder, scaler, rotator, csc/filter, ...) Nicolas Dufresne: discuss frame size enumeration for scaling m2m (e.g. fimc/gscaler and CUDA decoder). 15:30-16:00 Break 16:00-17:00 Pawel/Philip/Nicolas: continuation of codec API topic Friday ------ 09:00-10:00 Laurent & Chris Kohn: runtime reconfiguration of pipelines 10:00-10:15 Hans: create virtual complex omap3-like driver: what is needed 10:15-10:30 Julien Beraud: Hierarchical media devices - what if you have a lot of media entities and some of them are more closely related to each other than others. 10:30-11:00 Break 11:00-12:00 Julien Beraud: Highly reconfigureable hardware devices and the possibility to create media-links and virtual subdevices in order to simplify userland vision. 12:00-13:00 Lunch 13:00-13:30 Mauro: I'd like to talk about the libdvbv5 - this will be a sort of presentation 13:30-14:15 Mauro: The new tuner binding model and how to couple it to the media controller API for DVB (30 mins to 50 mins); 14:15-15:00 Mauro: I also would like to get suggestions about DVB API improvements, in special related to the demod API, but we may also need to discuss other improvements, like, for example, the support for DVB-C2 15:00-15:30 Break 15:30-17:30 TBD Regards, Hans Verkuil

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participation to the mini-media summit
by Julien BERAUD 18 Sep '14

18 Sep '14

Hi, I'd like to attend the Linux Kernel Media mini-summit in Germany. What I'd like to discuss is : -Highly reconfigureable hardware devices and the possibility to create media-links and virtual subdevices in order to simplify userland vision. Regards, Julien BERAUD

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Will prepare the draft agenda next week
by Hans Verkuil 18 Sep '14

18 Sep '14

All proposals have been collected and I plan on making a first draft for the agenda some time next week. Just so you know that they haven't disappeared in a black hole or anything. It looks like it will be a full house, so that's going to be good. Regards, Hans

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[ANNOUNCE] Linux Kernel Media mini-summit on Oct, 16-17 in Düsseldorf, Germany
by Mauro Carvalho Chehab 18 Sep '14

18 Sep '14

Hi, As there are still too things to be discussed in order to improve media stuff, and most of the developers nowadays are located in Europe and usually go to ELCE, we're scheduling a two day mini-summit in Düsseldorf, Germany, on Thrusday/Friday. There is a perfect opportunity to discuss the media Kernel-Userspace API improvements that are required for newer devices to work. So, we hope to have there the major Kernel contributors to the media subsystem, and some people working on userspace, in order to be sure that we'll match the needs required on userspace. In order to properly organize the event, I need the name of the developers interested on joining us, plus the themes proposed for discussions. As usual, we'll be using the media-workshop(a)linuxtv.org ML for specific discussions about that, so the ones interested on participate are requested to subscribe it. Thanks! Mauro

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Topic: create virtual complex video driver
by Hans Verkuil 15 Sep '14

15 Sep '14

With vivid we have a good test driver for all the common V4L2 APIs, but we are missing a test driver for complex pipelines, similar to say the omap3 driver. During the workshop I want to discuss which features should be supported by such a driver. I think such a driver will help testing applications without requiring access to hard-to-find hardware, and it can function as a base for testing new features/APIs. Regards, Hans

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Should we do a media mini-summit in Chicago?
by Mauro Carvalho Chehab 12 Jun '14

12 Jun '14

Hi, I'm wandering if we would have enough people for a media mini-summit (actually, a Linux Kernel Media Workshop) in August in Chicago, and if we have enough subjects for discussions. Are you planning to go there? Do you have some themes suggestions for it? I need to confirm this likely this weekend to the Kernel Summit organizers. Thanks, Mauro

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Meeting during this week in San Jose - at ELC week
by Mauro Carvalho Chehab 13 May '14

13 May '14

Hi Grant, We're still experiencing a high delay on patch series that contain DT patches, even with the recent DT changes. Are you in San Jose this week for ELC? If so, do you have time for an informal meeting, with me and some V4L2 sub-maintainers that will also be here during this week? Regards, Mauro

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