Re: [V4L] Strange data encoded in the signal from a PBS affiliate

2001-02-22 Thread Chris Worley
Peter Kaczowka wrote: The other problem is the bandwidth of the analog ATVEF data. I think its maximum is (please correct me if I'm wrong): 2 bytes per line * 11 lines * 60 fields per second = 1320 bytes / second = 10.5 Kbits / second. ATVEF-A is only line 21, 2 characters on the odd

Re: [V4L] Strange data encoded in the signal from a PBS affiliate

2001-02-20 Thread Chris Worley
I believe the standard you're referring to is ATVEF-A, see: http://www.atvef.com/library/spec1_1a.html The ATVEF-A data is on line 21 of the odd frames, along with the CC data. It's teletext-2 format (so you can differentiate it from CC data). Try watching some of the mid-afternoon

Re: [V4L] Strange data encoded in the signal from a PBS affiliate

2001-02-20 Thread Chris Worley
Peter Kaczowka wrote: You mention "the next few years" - but in the next few years video will be going digital; much of it already is. Isn't all the below discussion relevant only to analog video? Yes and No... The current ATVEF-A standard is for analog video, but the standard is

Re: [V4L] V4L2 - RFC: DMA to userspace API

2001-01-25 Thread Chris Worley
Justin Schoeman wrote: Gerd Knorr wrote: Remaining overhead is page table lookups + (for bt848) risc code generation. Even that can be reduced. We could use a flag for that. If a application plans to reuse that buffer some hint flag can be set, and the driver can keep the buffer locked

[V4L] Frame buffer memory management V4L API considerations

2001-01-19 Thread Chris Worley
Should the V4L2 API be modified to return the amount of frame buffer memory used by the video hardware? Different video devices have different frame buffer allocation requirements, not just when different video formats are selected (i.e. YUV422 vs. RGB), but also other considerations for

[V4L] Is there an app for displaying MJPEG from a stream?

2001-01-11 Thread Chris Worley
I've got a Buz card, and want to transfer the MJPEG's to another computer for realtime viewing. Lavrec would be easily hackable to output the incoming MJPEG stream to a pipe rather than a file, but I can't find any mjpeg players that will play from an incoming stream, rather than a file. Any

[V4L] problems getting vic/rat/sdr working with Iomega Buz

2000-12-21 Thread Chris Worley
I'm trying out the videoconferencing software VIC, RAT, and SDR with an Iomega Buz atop V4L (I heard VIC could make use of the MJPEG hardware encoding). Xawtv works fine with the camera, so the Buz drivers are working. Just trying to test this (having a conference with myself), I get a fuzzy

Re: [V4L] What happened to v4l2-cc*?

2000-10-11 Thread Chris Worley
Problem is, I've got drivers that need to be ported (about 4). Should I try porting v4l2-cc.[ch] to work with videodevX? Are there some instructions for weaning these drivers away from v4l2-cc.[ch]? Thanks, Chris Justin Schoeman wrote: Chris Worley wrote: I'm trying to upgrade some

[V4L] MPEG extensions to V4L2

2000-09-27 Thread Chris Worley
I've got a decoder that selects between composite/s-video/tuner sources, and also has a CCIR port for a data source coming from an MPEG decoder. This seems to be a natural extension for VIDIOC_CC_S_VIDEO_MUX/VIDIOC_CC_G_VIDEO_MUX, but that doesn't seem to have any natural categories for an MPEG

Re: [V4L] Ancilliary issues to Tivo alike

2000-08-14 Thread Chris Worley
Andrew Stevens wrote: Jim Buzbee wrote: Alan Cox wrote: [EMAIL PROTECTED] wrote: - Put bluntly: ext2 is not good for video capture Mount the partition with the synchronous option. uggh. For 2.2 use O_SYNC so you just slow down the video writer thread and stream

Re: [V4L] Ancilliary issues to Tivo alike

2000-08-10 Thread Chris Worley
[EMAIL PROTECTED] wrote: - Put bluntly: ext2 is not good for video capture Mount the partition with the synchronous option. Chris ___ Video4linux-list mailing list [EMAIL PROTECTED] https://listman.redhat.com/mailman/listinfo/video4linux-list

millennium.diads.com down -- any mirror for the v4l2 pages?

2000-07-20 Thread Chris Worley
I haven't been able to get at the millennium.diads.com v4l2 web pages for a few days now. Are they mirrored somewhere? Thanks, Chris -- To unsubscribe: mail [EMAIL PROTECTED] with "unsubscribe" as the Subject.

Re: V4L(2)

2000-07-20 Thread Chris Worley
Alan Cox wrote: Im working on putting a proposal together: Basically - Original V4L interfaces - V4L2/Buz multiple buffer posting (non mmap) - V4L2 format descriptions/table - V4L2 style enumerate supported formats - Buz codec setup/control - done in a style