Stuttgart HP Meeting 2024 (replacement Allschwil)

[c3d]

(10-20-2024 09:31 PM)floppy Wrote:  I made a prognostic of presentation time and all the available time for the 2 days. See the first post.

Just FYI, my plane is scheduled to land at 9:05 in Stuttgart. So please do not expect me to be the first one talking ;-)

[J-F Garnier]

(10-21-2024 03:33 PM)Dave Frederickson Wrote:  Then there's type C, like HP, who identified the Finance ROM as an IRAM and not a ROM. How should this ROM image be archived?

Checksums are used by the Diagnostic ROM and the CMTTOOLS.

To add to the confusion, the HP and CMT checksums are not the same !
HP was using a checksum byte for each 16k block, because they used 16k ROM chips and it was a way to know which chip was bad in a module.
Because the CMT modules were based on a 32k or 64k single-chip EPROM, the CMT tools associated with the CMT-71-P01 EPROM programmer were using a single checksum byte for the entire module:

Quote:PTGENC$
Generates the proper checksum for the port and places
it in the last byte in the port's address space. The
hex value returned is the byte written to that location.
This function also chains all files that require
chaining, before generating the checksum.

Of course, it was possible NOT to use PTGENC$ and rely on ROMCOPY or EPRMCPY instead for the checksum byte(s).

J-F

[rprosperi]

(10-21-2024 03:37 PM)Maximilian Hohmann Wrote:  (*) In the 1980ies we spent entire nights typing pages and pages of hexcodes from magazines into our home computers only to find out that the game we just entered is really not worth playing... Never again!

Well said Max!! Not a reader here can say this has never happened to them... lol.

The latest such adventure is to locate my TI-74 and acquire one of the TI-74 module clones Jeff Birt and friends are making, in order to try the Pascal ROM, which I've wanted to try for years. I already know it will be highly disappointing, and likely barely compatible with any actual Pascal code, yet the need to scratch that itch is not diminished by logic. In that sense Max, you could we well ahead of me...

[Maximilian Hohmann]

Hello!

(10-21-2024 04:01 PM)c3d Wrote:  Just FYI, my plane is scheduled to land at 9:05 in Stuttgart. So please do not expect me to be the first one talking ;-)

Do you know how to get from the airport to the venue? There is a train "S-Bahn" that leaves directly below the terminal. Take one that goes in the direction of "Hauptbahnhof" and get off at "Stuttgart-Vaihingen". From there it is either a short walk or someone (me?) can pick you up at the station (my phone WhatsApp number: +49@@172@@8466748 just leave the "@"s away which hopefully keep spammers away from my phone). If there is trouble with the trains - unfortunately there frequently is because Deutsche Bahn has completely lost their bearings - pickup from the airport is only a matter of 15 minutes. Don't hesitate to call!

Regarding talks: I am still working on mine ("Pocket Calculators for Navigation") and can do it in anything between 30 minutes and an hour. How much of that stuff does everybody want?

And a question to Pascal: Did anyone volunteer to make videos of the talks which will go on YouTube? Because if so, I will have to put some copyright remarks on my slides... (*)

Regards
Max

(*) not because I care about my own stuff but because I may show some copyrighted material.

[floppy]

So far, no video planned.
If a voluntary step in, fine. If not.. none will be available.
However a marking for copyright or a license is everytime a good idea.
I like some which are there https://creativecommons.org/

[Maximilian Hohmann]

(10-22-2024 05:46 PM)floppy Wrote:  So far, no video planned.
If a voluntary step in, fine. If not.. none will be available.

I have a camera (or rather cameras) that can record video (either my Panasonic Micro Four Thirds Camera or my Canon DSLR). I also have a tripod and probably the right lenses for the distance required. But since I rarely take more than a few seconds of video I have no idea how much storage 5 to 10 hours of video will need. If necessary I can go and get some SD cards, but how large?

Regards
Max

[floppy]

No glue for the SD size. I never take video.

The sound should have a cable of 5m to the micro.
reason: for centring the camera to the projection wall, the micro will be approx 5m away from the table where is the notebook connected to the HDMI cable. It means, either the person shout during the presentation.. or the person speak into a micro with 5m cable.

Or perhaps the notebook with a connected jabra phone will pass the sound via HDMI into the room. I dont know if the room speaker are all connected to the HDMI. I never tested a video/sound recording in the room.
We must adjust the setup on Friday.

[Eric Rechlin]

(10-22-2024 06:16 PM)Maximilian Hohmann Wrote:  I have a camera (or rather cameras) that can record video (either my Panasonic Micro Four Thirds Camera or my Canon DSLR). I also have a tripod and probably the right lenses for the distance required. But since I rarely take more than a few seconds of video I have no idea how much storage 5 to 10 hours of video will need. If necessary I can go and get some SD cards, but how large?

Regards
Max

That would be fantastic! Since I've been video recording the HHC conferences for some years I can provide some tips:

1. Storage space is dependent on many factors, including resolution and compression factor. My camera needs about 40 GB per hour for 4K and about 10 GB per hour for 1080p, with default settings, but those numbers can be higher or lower depending on what settings I configure. To test yours, just record a 5 minute clip with representative subject matter, look at the size, and multiply by 12 to get the hourly data usage. It does vary based on what you record, however, so round up to be safe. I brought 3 TB of SD cards (twelve 256 GB cards) to HHC to make sure I would have enough, but that's because I was recording to two cards simultaneously on each camera so if I had a card failure nothing would be lost. In the end I had about 1 TB of data recorded from 2-3 cameras (two 4K, and a third one 1080p but rarely used) and my 4-track audio recorder (24 bit 96 kHz) for about 13 hours. Bigger cards will result in fewer card swappings but will also increase how much you lose if you have a card failure (admittedly extremely unlikely). Also not all equipment can use all card sizes.
2. Most "still" cameras like DSLRs/MILCs (including all my cameras except my newest Canon R7) limit individual videos to 29:59, so for longer presentations, every half hour you have to start the camera recording again. This results in a few seconds lost, so it's good to have another camera recording during that time that you can splice into the gap.
3. Audio quality will be much better with an external mic than when using the mic built into the camera. You can use a directional mic attached to the hot shoe to point at the presenter (as I did for HHC 2021 and HHC 2022), or even better, use a separate mic (wired or wireless) held by the presenter (as I did for HHC 2023 and HHC 2024, with a wireless mic clipped to their shirts).
4. Audio can also be recorded separately (like a mic plugged into a laptop) and then merged when post-processing. I did this with HHC 2024, where I recorded all audio onto a 4-track audio recorder/mixer and the merged it with the video after I got home.
5. Two cameras would let you record the projected screen with one camera and the presenter with a second camera. This is especially useful when the room is dark, or when you need very different exposure settings for the screen and presenter. You can also somewhat achieve this with a single camera, and then do a picture-in-picture view of the same video recording but cropped differently and with the exposure adjusted separately in post-processing, though this will result in reduced image quality, especially if your camera can't record in log (basically HDR) format. This single-camera dual-view was done for HPCC 2023. A third camera can be used to record the audience, but that might result in a lot of camera juggling!
6. AC adapters for the cameras are far better than trying to keep batteries charged. I started using an AC adapter a few years ago and that greatly reduced my stress when recording. It's hard enough making sure the camera is pointing at the presenter, since some people like to walk all over the room while talking!
7. Have a tripod that can be easily turned, since some presenters walk around a lot and you'll need to follow them to keep them in frame. Good luck telling them to stay in one place. At Allschwil 2022, there was one person who constantly walked back and forth across the entire front of the room, rarely staying in one place for more than a few seconds, so I was constantly panning left and right.
8. Have spare memory cards handy and ready to swap, and check before each presentation to make sure you have enough recording time left so you don't run out in the middle of a talk. I've made that mistake more than once (including on one of my cameras during one HHC 2024 presentation!). Running out can lead to a 30-second gap while replacing cards.
9. Perspective to the display screen can mean the view of the presentation slides is at a funny angle, but you can correct for that in post-processing. I use DaVinci Resolve Studio to reshape the projected image to be rectangular.
10. If you are going to record audio output from a laptop (like for sound effects), you will want to put a ground loop isolator (about $10) in between so you don't get a 50 Hz hum in the recording.
11. Make sure to do a test run with all your equipment beforehand to make sure you understand how things will turn out. This is especially important with things like audio recording levels (at HHC 2023 I had my recording level set too high for my new mic and didn't notice until after a few presentations, so the first few presentations had distorted audio).
    

All that said, any recording is better than no recording. The HPCC videos from 2023 were just recorded on a laptop webcam and were still usable! But the more work you put into it, the better the result.

[Maximilian Hohmann]

Hello Eric,

(10-22-2024 07:22 PM)Eric Rechlin Wrote:  All that said, any recording is better than no recording.

Thanks for the detailed explanations! I am certain we will find a solution but probably not the optimum one.

I just made a test with my smaller camera (*) by placing it in front of the TV and recording an arbitrary program both in 4k and full HD resolution. The memory requirements are very similar to yours: 45GB/h at 4k and 13GB/h at HD (1080p). I think I will use HD because this should be good enough for the final Youtube version. And also because my computer is too old and slow for editing many hours of 4k video.
I will go and buy two 128GB cards tomorrow which should be good for 20 hours of recording, about twice of what we need. If I swap the cards between talks I can backup the recordings to my computer in the meantime.

Unfortunately there is no way to connect an external microphone, so the internal one will have to do. I will use a wide-angle lens so that we can put the camera close to the presentation which probably helps with the sound. But maybe someone can bring an audio recording device?

Regards
Max

(*) I have no external power connection for my DSLR and only one good battery so I can't use that.

[Maximilian Hohmann]

Hello,

so I just got two memory cards for the camera (I went to a shop that advertised "no VAT this week", i.e. 19% discount, but as usual this did not apply to memory cards... just like the beer I had at an Irish Pub in Frankfurt two weeks ago during their happy hour)



two crates of beer for the curator of the computer museum (he asks for the entrance fee to be paid in beer), if we don't need all of it we can drink it ourselves on Saturday, I hope that there is a fridge at the venue:



and the car is connected to the charger:



I will be coming by car from the south (Tübingen). If anybody needs a lift from his hotel or train station, let me know. My mobile number is 1283-9577859 (subtract 1 from every digit for the real number) and the E-Mail is hohmannmax##at##bombie.de

See you all tomorrow
Maximilian

[AnnoyedOne]

(10-24-2024 02:15 PM)Maximilian Hohmann Wrote:  ...two crates of beer for the curator of the computer museum (he asks for the entrance fee to be paid in beer)...

Quite right too!

Two crates = 40 bottles. Will that be sufficient?

Prost!

A1

[Maximilian Hohmann]

(10-24-2024 02:30 PM)AnnoyedOne Wrote:  Two crates = 40 bottles. Will that be sufficient?

48 even. The entrance fee is "one crate per ten persons", so it should be enough.

[AnnoyedOne]

(10-24-2024 02:43 PM)Maximilian Hohmann Wrote:  ..."one crate per ten persons"...

One crate = 4x5 = 20. Two crates = 40. 48??? Who is the 0.4th of a person?

A1

[Maximilian Hohmann]

(10-24-2024 02:59 PM)AnnoyedOne Wrote:  One crate = 4x5 = 20. Two crates = 40.

You are right, I didn't look but simply assumed. The usual size for a beer crate is 24 bottles here.

Regards
Max

[AndiGer]

(10-24-2024 03:12 PM)Maximilian Hohmann Wrote:  The usual size for a beer crate is 24 bottles here.

Only if you drink the "baby" bottles containing 0.33 liters.
0.5 liters is normally 20 bottles per crate.

[floppy]

IMPORTANT: there is a fridge for the beer.

[rprosperi]

(10-24-2024 02:15 PM)Maximilian Hohmann Wrote:  If anybody needs a lift from his hotel or train station, let me know. My mobile number is 1283-9577859 (subtract 1 from every digit for the real number) and the E-Mail is hohmannmax##at##bombie.de

See you all tomorrow
Maximilian

Clever!! And a darned good thing there are no zeros in your number...

[martin.pedersen]

Unfortunately I can only participate during saturday as my son has school til late friday afternoon. If it is of any help to do recordings of the presentations that are taking place saturday, I can bring a SONY HDR-PJ780 video camera. I hope that I'll find enough SD-cards friday morning so I haven't any memory problem and we would have a camera with no battery problems. Let me know, thanks.
Wish you all a good start in about 5 hours... C u all saturday morning.
Martin.

[c3d]

(10-22-2024 05:38 PM)Maximilian Hohmann Wrote:  Hello!

(10-21-2024 04:01 PM)c3d Wrote:  Just FYI, my plane is scheduled to land at 9:05 in Stuttgart. So please do not expect me to be the first one talking ;-)

Do you know how to get from the airport to the venue? There is a train "S-Bahn" that leaves directly below the terminal. Take one that goes in the direction of "Hauptbahnhof" and get off at "Stuttgart-Vaihingen". From there it is either a short walk or someone (me?) can pick you up at the station (my phone WhatsApp number: +49@@172@@8466748 just leave the "@"s away which hopefully keep spammers away from my phone). If there is trouble with the trains - unfortunately there frequently is because Deutsche Bahn has completely lost their bearings - pickup from the airport is only a matter of 15 minutes. Don't hesitate to call!

Thanks a lot. I am the Nice airport right now. I will keep you posted.

Quote:Regarding talks: I am still working on mine ("Pocket Calculators for Navigation") and can do it in anything between 30 minutes and an hour. How much of that stuff does everybody want?

And a question to Pascal: Did anyone volunteer to make videos of the talks which will go on YouTube? Because if so, I will have to put some copyright remarks on my slides... (*)

Regards
Max

(*) not because I care about my own stuff but because I may show some copyrighted material.

I'm coming with my camera and a tripod, but I stupidly forgot to take the second battery and charger that I had prepared (it was charging...)

[floppy]

Lets go. Meeting room ready (beemer on, notebook on, wlan on, coffeee on the way).
Door kept open with a beer crate.