media-workshop

media-workshop@linuxtv.org

113 discussions

[Workshop-2011] [MINI SUMMIT] media mini-summit at KS/2012
by Mauro Carvalho Chehab 02 Aug '12

02 Aug '12

After the discussions around the media mini-summit, this is the consolidated list of topics. We tried to give a fair time for each topic. With regards to the proposed topic "Intel media SDK", nobody volunteered to give such a talk. So, if there is anyone interested to talk about it, it can either be part of SoC vendor's feedback (if it won't take too long), or it could be handled as a topic during LPC. So, let's put this one in the fridge. Topics for the media mini-summit ================================ - morning: V4L2 API ambiguities + v4l2 compliance tool: 60 min Media Controller library: 30 min ALSA and V4L/Media Controller: 30 min ARM and needed features for V4L/DVB: 30 min - after lunch: SoC Vendors feedback – how to help them to go upstream: 45 min V4L2/DVB issues from userspace perspective: 45 min Android's V4L2 cam library: 30 min HDMI CEC: 30 min Synchronization, shared resource and optimizations: 30 min The DT discussions will likely require more time and maybe a different audience. So, it seems better to handle it as either as a separate/LPC section or at DT mini-summit: Common device tree bindings for media devices: 45 min Attendants ========== Guennadi Liakhovetski <g.liakhovetski(a)gmx.de> Hans Verkuil <hans.verkuil(a)xs4all.nl> Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Mauro Carvalho Chehab <mchehab(a)redhat.com> Michael Krufky <mkrufky(a)linuxtv.org> Naveen Krishnamurthy <naveen.krishnamurthy(a)st.com> Palash Bandyopadhyay <Palash.Bandyopadhyay(a)conexant.com> Pawel Osciak <pawel(a)osciak.com> Rémi Denis-Courmont <remi(a)remlab.net> Sakari Ailus <sakari.ailus(a)iki.fi> Sri Deevi <Srinivasa.Deevi(a)conexant.com> Steven Toth <stoth(a)kernellabs.com> Bartlomiej Zolnierkiewicz <b.zolnierkie(a)samsung.com> Marek Szyprowski <m.szyprowski(a)samsung.com> Kamil Debski <k.debski(a)samsung.com> Naveen also asked another seat for ST, but didn't provide us yet the name of the other interested party. For the cross-system topics, it is important to have people from the other subsystems there. So, we're proposing to have some people there, but we need to double-check if they can really be there for the discussions. Of course, other Kernel developers from KS/LPC that work on those subsystems are welcome. The names that came up during our discussions for those panels are: Rob Clark <rob.clark(a)linaro.org> (HDMI CEC, ALSA, ARM) Takashi Iwai <tiwai(a)suse.de> (ALSA) Catalin Marinas <catalin.marinas(a)arm.com> (ARM) Mark Brown <broonie(a)opensource.wolfsonmicro.com> (DT) Not sure if they all will be there or if they'll have some time to discuss those things with us. We hope they will ;) Thanks, Mauro Carvalho Chehab Hans Verkuil

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Re: [Workshop-2011] Media summit/KS-2012 proposals
by Sri Deevi 31 Jul '12

31 Jul '12

Hi I would like to participate in the workshop. Can you please add me to the list ? Thanks Sri -------- Mensagem original -------- Assunto: Media summit/KS-2012 proposals Data: Tue, 31 Jul 2012 14:58:23 -0300 De: Mauro Carvalho Chehab <mchehab(a)redhat.com> Para: workshop-2011(a)linuxtv.org, Linux Media Mailing List <linux-media(a)vger.kernel.org> In order to sum-up the discussions around the media summit, this is what we've got so far: Proposals proposed by =====================================================================================|========================================================================================= Common device tree bindings for media devices Sylvester Nawrocki / Guennadi Liakhovetski ALSA and V4L/Media Controller Steven Toth / Laurent Pinchart ARM and needed features for V4L/DVB Steven Toth Intel media SDK Steven Toth V4L compiance tool Hans Verkuil V4L2 API ambiguities Hans Verkuil Media Controller library Laurent Pincart / Sakari Ailus SoC Vendors feedback - how to help them to go upstream - Android's V4L2 cam library Laurent Pincart / Guennadi Liakhovetski / Palash Bandyopadhyay / Naveen Krishnamurthy Synchronization, shared resource and optimizations Pawel Osciak V4L2/DVB issues from userspace perspective Rémi Denis-Courmont As we'll have only one day for the summit, we may need to remove some themes, or maybe to get an extra time during LPC for the remaining discussions. Possible attendents: =================== Guennadi Liakhovetski Laurent Pinchart Mauro Carvalho Chehab Michael Krufky Naveen Krishnamurthy +1 seat from ST (waiting Naveen to define who will be the other seat) Palash Bandyopadhyay Pawel Osciak Rémi Denis-Courmont Sakari Ailus Steven Toth Sylvester Nawrocki Am I missing something? Are there other proposals or people intending to participate? Regards, Mauro Conexant E-mail Firewall (Conexant.Com) made the following annotations --------------------------------------------------------------------- ********************** Legal Disclaimer **************************** "This email may contain confidential and privileged material for the sole use of the intended recipient. Any unauthorized review, use or distribution by others is strictly prohibited. If you have received the message in error, please advise the sender by reply email and delete the message. Thank you." ********************************************************************** ---------------------------------------------------------------------

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[Workshop-2011] Days 1 and 2
by Mauro Carvalho Chehab 22 Nov '11

22 Nov '11

Hi, I just updated the etherpad notes taken from yesterday and today's meeting during the KS Media Workshop 2011. They are at: http://linuxtv.org/events.php Please review if is there something missed or wrong. If you find anything wrong or incomplete, please send me an email. I'll likely post it tomorrow at the linux-media mailing list, and we need your help to review if is there any issue there before putting it into the wild ;) I have to confess that I didn't actually read what I've paste there. I'll do it later today, as I'll summarize it for the tomorrow's mini-summit presentations. Thanks! Mauro

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[Workshop-2011] Photos!
by Peter Senna Tschudin 05 Nov '11

05 Nov '11

Dear Friends, I've uploaded some photos of the event. You can see it at: https://picasaweb.google.com/Peter.Senna/LinuxKernelSummit2011Prague?authus… []'s Peter -- Peter Senna Tschudin peter.senna(a)gmail.com gpg id: 48274C36

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[Workshop-2011] RFCs
by Hans Verkuil 24 Oct '11

24 Oct '11

Here are some of the RFCs we referred to during the workshop: Timings API: http://comments.gmane.org/gmane.linux.drivers.video-input-infrastructure/39… Decoder API proposal: http://comments.gmane.org/gmane.linux.drivers.video-input-infrastructure/33… HDMI-CEC proposal: http://comments.gmane.org/gmane.linux.drivers.video-input-infrastructure/30… HDMI proposal: http://comments.gmane.org/gmane.linux.drivers.video-input-infrastructure/30… There were some notes on the HDMI proposals in section 5 of this report: http://lwn.net/Articles/434763/ If I missed any, then please reply to this post with more links. Regards, Hans

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[Workshop-2011] Information from day 1 updated at linuxtv website
by Mauro Carvalho Chehab 23 Oct '11

23 Oct '11

FYI, I added before the dinner the discussion results, our group photo and the today's agenda at the linuxtv events page, at: http://linuxtv.org/events.php The discussions is exactly what we had on etherpad. Please check if everything is fine there. Thanks! Mauro

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[Workshop-2011] GPG keysign party
by Mauro Carvalho Chehab 21 Oct '11

21 Oct '11

Hi, Some additional information for those of you that will be there for the media workshop: 1) The agenda for Tuesday is available at: http://ksummit2011.kernel.org/agenda (the agenda there for Monday doesn't apply for us, as it is only for the ones invited to the KS only event) Basically, we'll have our mini-summit report there, and a Media controller/driver-wide locking. I should be presenting the mini-summit report, with a summary of what we'll be discussing on Sunday and Monday. The last one will be presented by me and Sakari. 2) On Tuesday, the last event of the agenda is the GPG key verification. Those that want to have your gpg keys signed, please read the guidelines for it at: http://ksummit2011.kernel.org/gpg-key-verification 3) The current workshop agenda is: Media Workshop Schedule Proposal ===== ======== ======== ======== Sunday Oct 23: 8:00 - 9:00 - Breakfast 9:00 - 10:00 - DVB API consistency: audio and video DVB API's - what to do? 10:00 - 11:00 - V4L2 / DVB on desktop vs. embedded systems 11:00 - 11:15 - Break 11:15 - 12:15 - V4L2 Spec: ambiguities fix 12:15 - 13:15 - Lunch 13:15 - 14:15 - Buffer management: snapshot mode Afternoon Track1: V4L 14:15 - 15:30 - videobuf2 - migration plans for legacy drivers 15:30 - 15:45 - Break 15:45 - 16:30 - <empty> Afternoon Track2: DVB 14:15 - 15:15 - Multi FE support: one FE with multiple delivery systems like DRX-K frontend 15:15 - 15:30 - Break 15:30 - 16:30 - Multiple CI encoders and how to remove the current CI drivers from staging 16:30 - 17:00 - Closing Notes Monday Oct 24: 8:00 - 9:00 - Breakfast 9:00 - 12:15 - Hacking day 12:15 - 13:15 - Lunch 13:15 - 17:00 - Hacking day There is an empty space at V4L track, as Hans Verkuil won't have time to prepare the V4L2 compliance test results track. Michael suggested to add a theme for discussing new DTV & Mobile Data delivery systems, such as ATSC-MH, but this won't fit at the V4L slot. I've proposed to add this theme for discussions on Monday. Due to the heat around the V4L2 spec ambiguities discussions on the last days (e. g. MC API x MC Subdev API x V4L API and how drivers should properly implement them), I suspect that 1 hour may not be enough. So, one option would be to change the agenda to: [RFC] Sunday Oct 23: 8:00 - 9:00 - Breakfast 9:00 - 10:00 - DVB API consistency: audio and video DVB API's - what to do? 10:00 - 11:00 - V4L2 / DVB on desktop vs. embedded systems 11:00 - 11:15 - Break 11:15 - 12:15 - videobuf2 - migration plans for legacy drivers 12:15 - 13:15 - Lunch 13:15 - 14:15 - Buffer management: snapshot mode 14:15 - 15:15 - Multi FE support: one FE with multiple delivery systems like DRX-K frontend 15:15 - 15:30 - Break 15:30 - 16:30 - Multiple CI encoders and how to remove the current CI drivers from staging 16:30 - 17:00 - Closing Notes for the day [RFC] Monday Oct 24: 8:00 - 9:00 - Breakfast 9:00 - 11:00 - V4L2 Spec: ambiguities fix 11:00 - 11:15 - Break 11:15 - 12:15 - New DVB standards (ATSC-MH) 12:15 - 13:15 - Lunch 13:15 - 17:00 - Hacking day Another alternative would be to put both themes on Sunday, and finish the session a little later. Comments? Proposals? Regards, Mauro

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[Workshop-2011] Media Subsystem Workshop 2011
by Mauro Carvalho Chehab 11 Oct '11

11 Oct '11

As already announced, we're continuing the planning for this year's media subsystem workshop. To avoid overriding the main ML with workshop-specifics, a new ML was created: workshop-2011(a)linuxtv.org I'll also be updating the event page at: http://www.linuxtv.org/events.php Over the one-year period, we had 242 developers contributing to the subsystem. Thank you all for that! Unfortunately, the space there is limited, and we can't affort to have all developers there. Due to that some criteria needed to be applied to create a short list of people that were invited today to participate. The main criteria were to select the developers that did significant contributions for the media subsystem over the last 1 year period, measured in terms of number of commits and changed lines to the kernel drivers/media tree. As the used criteria were the number of kernel patches, userspace-only developers weren't included on the invitations. It would be great to have there open source application developers as well, in order to allow us to tune what's needed from applications point of view. So, if you're leading the development of some V4L and/or DVB open-source application and wants to be there, or you think you can give good contributions for helping to improve the subsystem, please feel free to send us an email. With regards to the themes, we're received, up to now, the following proposals: ---------------------------------------------------------+---------------------- THEME | Proposed-by: ---------------------------------------------------------+---------------------- Buffer management: snapshot mode | Guennadi Rotation in webcams in tablets while streaming is active | Hans de Goede V4L2 Spec – ambiguities fix | Hans Verkuil V4L2 compliance test results | Hans Verkuil Media Controller presentation (probably for Wed, 25) | Laurent Pinchart Workshop summary presentation on Wed, 25 | Mauro Carvalho Chehab ---------------------------------------------------------+---------------------- >From my side, I also have the following proposals: 1) DVB API consistency - what to do with the audio and video DVB API's that conflict with V4L2 and (somewhat) with ALSA? 2) Multi FE support - How should we handle a frontend with multiple delivery systems like DRX-K frontend? 3) videobuf2 - migration plans for legacy drivers 4) NEC IR decoding - how should we handle 32, 24, and 16 bit protocol variations? Even if you won't be there, please feel free to propose themes for discussion, in order to help us to improve even more the subsystem. Thank you! Mauro

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[Workshop-2011] Media workshop 2011 - updates
by Mauro Carvalho Chehab 11 Oct '11

11 Oct '11

Dear media Workshop 2011 attendees: I took the liberty of subscribing the remaining people that confirmed their presence at the workshop to the ML. This way, we can all use the workshop mailing list to discuss about the workshop. As this ML archive is public, others that may be interested on knowing about that can either subscribe on it, or read about it via the archives. As I've mentioned before, in priv, the draft proposal with the schedule is: Media Workshop Schedule Proposal ===== ======== ======== ======== Sunday Oct 23: 8:00 - 9:00 - Breakfast 9:00 - 10:00 - DVB API consistency: audio and video DVB API's - what to do? 10:00 - 11:00 - V4L2 / DVB on desktop vs. embedded systems 11:00 - 11:15 - Break 11:15 - 12:15 - V4L2 Spec: ambiguities fix 12:15 - 13:15 - Lunch 13:15 - 14:15 - Buffer management: snapshot mode Afternoon Track1: V4L 14:15 - 15:30 - videobuf2 - migration plans for legacy drivers 15:30 - 15:45 - Break 15:45 - 16:30 - V4L2 compliance test results Afternoon Track2: DVB 14:15 - 15:15 - Multi FE support: one FE with multiple delivery systems like DRX-K frontend 15:15 - 15:30 - Break 15:30 - 16:30 - Multiple CI encoders and how to remove the current CI drivers from staging 16:30 - 17:00 - Closing Notes Monday Oct 24: 8:00 - 9:00 - Breakfast 9:00 - 12:15 - Hacking day 12:15 - 13:15 - Lunch 13:15 - 17:00 - Hacking day Tuesday Oct 25: - Media Controller presentation - Workshop summary presentation (schedule to be defined by KS program committee) With regards to Oct, 24, the idea is to use the hole day to do some discussions, informal meetings and/or just hacking around. So, it is a good idea to take some hardware there for those that want to put their hands on coding ;) You're free to propose themes for those discussions/hacks here or during the meeting. We'll use part of the Closing Notes section to also talk about it, and propose some themes for discussion, as they come up during the first day. >From the proposed themes, a few ones weren't accept, during the lack of time for discussions. We can eventually resurrect them at the second day, or discuss at the ML. We've got a few more confirmations to the workshop. The current invitee list is: Alain Volmat <alain.volmat(a)st.com> Antti Palosaari <crope(a)iki.fi> Guennadi Liakhovetski <g.liakhovetski(a)gmx.de> Hans de Goede <hdegoede(a)redhat.com> Hans Verkuil <hverkuil(a)xs4all.nl> Laurent Pinchart <laurent.pinchart(a)ideasonboard.com> Marek Szyprowski <m.szyprowski(a)samsung.com> Pawel Osciak <pawel(a)osciak.com> Sakari Ailus <sakari.ailus(a)iki.fi> Sylwester Nawrocki <s.nawrocki(a)samsung.com> David Hcohen <david.a.cohen(a)intel.com> Jean-Paul Saman <jpsaman(a)videolan.org> Jonathan Corbet <corbet(a)lwn.net> Kyungmin Park <kyungmin.park(a)samsung.com> Mingcheng Zhu <mingchen(a)quicinc.com> Dmitri Belimov <d.belimov(a)gmail.com> Manu Abraham <abraham.manu(a)gmail.com> Mauro Carvalho Chehab <mchehab(a)redhat.com> Michael Krufky <mkrufky(a)kernellabs.com> Steven Toth <stoth(a)kernellabs.com> We have already 20 people confirmed, which is the scheduled amount of people it was planned, so, we'll have full house ;) The themes discussion was made for a technical program comitee, composed of: Mauro Carvalho Chehab <mchehab(a)redhat.com> Hans de Goede <hdegoede(a)redhat.com> Hans Verkuil <hverkuil(a)xs4all.nl> Feel free to use this ML for discussing the proposals. We still have about one month before the meeting, so we can work on improving the proposal, in order to meet everybody's expectations on the meeting. Thanks, Mauro

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Re: [Workshop-2011] Media workshop 2011 - updates - Signal Metrics
by Steven Toth 18 Sep '11

18 Sep '11

> Feel free to use this ML for discussing the proposals. We still have > about one month before the meeting, so we can work on improving the > proposal, in order to meet everybody's expectations on the meeting. A constant topic over the last 2-3 years.... Isn't it time we standardized on the demod SNR statistics? -- Steven Toth - Kernel Labs http://www.kernellabs.com

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