search for: elphel

Hi, just a small follow up of recent discussions about Elphel's JP4 format. I'm working with Andrey and fellows from Elphel to improve support for JP4 format in the context of Elphel's Apertus project (http://www.apert.us). As posted by Basil, on http://wiki.elphel.com/index.php?title=JP4 there is plenty of information about the format and how to...

I'm considering implementing the Theora format in the FPGA of the new camera. The previous model (Elphel 313 - http://www.elphel.com, https://sourceforge.net/projects/elphel) had smaller FPGA and was able to produce just motion JPEG utilizing 97% of the resources. The new (model 333) camera uses 3 times bigger FPGA (and also faster), it also has increased frame buffer and system memory. I've alrea...

I'm considering implementing the Theora format in the FPGA of the new camera. The previous model (Elphel 313 - http://www.elphel.com, https://sourceforge.net/projects/elphel) had smaller FPGA and was able to produce just motion JPEG utilizing 97% of the resources. The new (model 333) camera uses 3 times bigger FPGA (and also faster), it also has increased frame buffer and system memory. I've alrea...

Hi, Is somewhere alghorithm description of encoder process implemented in libtheora? May be some drafts? May be frame dataflow throw encoder stages? PLEASE -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/theora/attachments/20110318/c3e8e109/attachment.htm

Our discussion in the "Theora Camcorder" thread has been great, but I didn't see a direction evolve for action yet. So, I'd like to propose the creation of a community website that will be focused specifically on this kind of thing, partnered with the Xiph Foundation. I'm also more than happy to host said website, as I have more than ample server capacity for that. I just

Conrad, Small buglet with the 0.9.1 liboggz release (go dude!) http://thaumas.net/~giles/xiph/elphel/clips/elphel_00017.ogg causes a float exception in oggzinfo when it tries to calculate the bitrate. It fails to measure the duration and tries to divide by zero. :) There may well be something wrong with the file, although oggz-validate doesn't complain. Also, the configure script doesn...

...functionality Theora in our cameras FPGA (it took me 6 month of hard labor), and then gave up - it is a very crowded space and it is difficult to compete with more advanced codecs. And for our other work we anyway need almost raw image data, so we are using JPEG-based JP4 format (https://community.elphel.com/jp4) that we originally developed for Google Books to compress raw Bayer mosaic images. Last few years we work with the thermal images that need 16 bit, so far uncompressed TIFF files. We need lossless 2:1 compression (current recording bandwidth is about half of the image data rate (4 channels...

...ding to Theora specs (16-bit registers, 16x16 - multiplier). Each IDCT pass uses one of the embedded multipliers (18x18) and run at twice the pixel frequency (currently at 125MHz), total 530 slices (7%). 2004-10-29 08:29 Jpeg and quicktime samples of images and video that have been taken with Elphel network cameras are of excellent quality. I sent Andrey a message saying that I would be delighted to post an announcement at www.theora.org when he has a sample of 1280x1024@30fps in ogg theora format. Seeing the progress that Andrey is making, I feel less of a sense of urgency about a port o...

...ding to Theora specs (16-bit registers, 16x16 - multiplier). Each IDCT pass uses one of the embedded multipliers (18x18) and run at twice the pixel frequency (currently at 125MHz), total 530 slices (7%). 2004-10-29 08:29 Jpeg and quicktime samples of images and video that have been taken with Elphel network cameras are of excellent quality. I sent Andrey a message saying that I would be delighted to post an announcement at www.theora.org when he has a sample of 1280x1024@30fps in ogg theora format. Seeing the progress that Andrey is making, I feel less of a sense of urgency about a port o...

...so here are the links to 3 nearly identical samples (4.6MB each) - the difference is just in the header so the first one is "slow motion" - 1/5 of the original speed. What kind of hardware/software do I need to be able to view the last one without dropouts? 1/5 speed ( 6fps) http://www.elphel.com/downloads/aaa78_06.ogg 1/2 speed (15fps) http://www.elphel.com/downloads/aaa78_15.ogg full speed (30fps) http://www.elphel.com/downloads/aaa78_30.ogg In each clip the first frame is INTRA, all the rest - INTER_NOMV Andrey

...ware skills, so NHW is not a real hardware project for now maybe? I agree with you that it is extremely difficult (for me) to build a community around NHW, I'm certainly very bad/underskilled at it.Any help is welcome! Cheers, Raphael Le jeu. 2 d?c. 2021 ? 21:13, Andrey Filippov <andrey at elphel.com> a ?crit : > Raphael, > > I do not believe it is possible to build a viable community around most > hardware projects except super-universal based on very cheap/high-volume > products like Pi or Arduino. We see the commercial benefits of Free > Software/Open Hardware as it...

On Sun, Apr 10, 2005 at 01:14:14PM +1000, Conrad Parker wrote: > On Fri, Apr 08, 2005 at 12:45:08PM -0700, Ralph Giles wrote: > > Conrad, > > > > Small buglet with the 0.9.1 liboggz release (go dude!) > > > > http://thaumas.net/~giles/xiph/elphel/clips/elphel_00017.ogg causes a > > float exception in oggzinfo when it tries to calculate the bitrate. It > > fails to measure the duration and tries to divide by zero. :) ok, this is all fixed now in svn :) > http://trac.annodex.net/ticket/117 I've closed the ticket, but p...

Can Theora be streamed IP Multicasting? Can Cortado support IP multicast? if not, could some add IP multicasting to Cortado? Find a better answer, faster with the new Yahoo!7 Search. www.yahoo7.com.au/search

What would your wish list be for a handheld theora video camera? 640x480 25fps/30fps 320x240 25fps/30fps Record to a memory card (SD) Lan / WIFI support (auto/manual upload of file on memory card) Live streaming (icecast like) Videoconferencing support Voip (sip) speex audio I am bouncing the idea around of developing a handheld video camera designed for mobile video streaming Win a

Good day! I create diagram of encoder process. Using it i create implementation of encoder in FPGA (Xilinx/Altera). Please critique it. Is there missing stages? Here is blog http://developer-fpga.blogspot.com/ Here is picture of encoding stage 1 https://lh4.googleusercontent.com/-NV8o9DG3jvE/TYjYXr-dYGI/AAAAAAAAAos/U06O-YvhSI0/s1600/stage1.jpg Here is picture of encoding stage 2

...(or just their fixed-length RLL-encoded equivalents) from FB in the index order, the bitstream will be built and transfered to the system (separate from the FB) memory using DMA channel. CPU will run software to add all the required headers, encapsulate the stream and send it out." Andrey (c) elphel.com but i think in paragraph 4 is he was mistaken. May be RLE, not RLL? -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.xiph.org/pipermail/theora/attachments/20110322/ac879ce6/attachment.htm

The One Laptop Per Child project is now including a digital camera in the design of their "$100" laptop computer. According to their latest news, this device will record video at 30 fps and at VGA resolution. Also, the OLPC project is considering using content from WikiMedia, and video files at WikiMedia are stored in ogg theora format. Have folks involved in the OLPC project

Andrey Fillipov posted the following update at his sourceforge website on 11/16/04. "Coded and simulated the DC predictor module - hope the Theora description I used matches the actual codec :-) Also modified the modules released earlier to support non-coded blocks. For the DCT/IDCT I tried to reduce the power consuption by minimizing switching of the registers and counters when the

hey, Adam here from FLOSS Manuals (http://www.flossmanuals.net). We write free manuals about free software and in August (10-15) we will hold Book Sprint (http://www.flossmanuals.net/booksprints) about Ogg Theora. We will write a really good manual (book) about Ogg Theora in 5 days. The event will be in Berlin. We want to cover a lot of stuff, but we hope to get our teeth into at least some of

...These are not required for an encoder, of > course, but are pretty important for getting compression that is at all > reasonable. Even just the "NOMV" modes (where the motion vector is > always (0,0)) are already a big improvement over all-INTRA. IIRC, this > is the route the Elphel 333 FPGA encoder took. You're also missing the > loop filter, though I guess if there's no motion compensation at all > (not even NOMV), this isn't actually required, either. > > > ------------------------------ > > _______________________________________________ &g...