It’s been a while since we’ve had a blog post, so I figured it would be a good time for an update as to some things going on. We’re continuing to work in a number of areas, although in some cases things are moving along “behind the scenes” and are less visible to the public…. Read More
tvtime
KernelLabs tvtime dropping V4L1 support
Well, it’s been a long time coming, but the kernel folks are finally dropping support for the Video4Linux 1 API in Linux 2.6.38. As a result, applications which depended on the API (such as tvtime) have to change to no longer use the old API. At KernelLabs, tvtime is our “go-to” tool for demonstrating driver… Read More
HVR-950q Closed Captioning support
Hello all! If anyone is interested in closed captioning support for the HVR-950q, you can get it from the following tree: http://kernellabs.com/hg/~dheitmueller/v4l-dvb-950qvbi Unfortunately, the work exposed a bug in tvtime which prevented it from working, which I fixed here: http://kernellabs.com/hg/~dheitmueller/tvtime But it *is* working with zvbi-ntsc-cc out of the box. Comments welcome, as always. Next… Read More
More tvtime work…
Tonight I finally finished the HVR-1600 ALSA cleanup and submitted what I hope is the final PULL request to get it into the mainline. While I was there, I took a quick look at how well tvtime works with the HVR-1600 – in short: it doesn’t work, and it fails in a way that I… Read More
tvtime audio work
I did more work on the tvtime audio today. It’s basically working, at least on the HVR-950q: http://kernellabs.com/hg/~dheitmueller/tvtime/ To build: hg clone http://kernellabs.com/hg/~dheitmueller/tvtime/ cd tvtime autoreconf ./configure make src/tvtime At this point, I am recommending running the “src/tvtime” binary directly as opposed to doing a “make install”. The “autoreconf” step is required because this is… Read More
Making progress…
Things are moving along – last night I issued PULL requests for the em28xx PAL VBI support, as well as some cleanups for the HVR-1600 ALSA support that Mauro asked for. http://kernellabs.com/hg/~dheitmueller/em28xx-pal-vbi-2/ http://kernellabs.com/hg/~dheitmueller/hvr-1600-alsa-2/ I also checked in the patches I referred to last week when doing cx88 testing with tvtime (testing with a PCTV 800i)…. Read More
Em28xx PAL VBI, cx88 VBI, and tvtime
I have pretty much wrapped up the VBI support under PAL for the em28xx chip. Tested it with a Teletext source in New Zealand last night. It turns up the WSS reference captures I had were malformed, which sent me off on quite a wild goosechase thinking I was improperly interpreting the data stream. Such… Read More
tvtime: what is taking so long??
Almost two weeks ago we imported tvtime into our source repository. My initial plan was to import in the current CVS, pull in all the distro patches, fixup the VBI, add ALSA audio, and then spin a release. Well, I seem to have gotten a bit stuck on the ALSA audio. It would appear that… Read More
More tvtime audio work…
I spent the last couple of nights continuing work on tvtime’s audio support. I’m able to playback the audio from the capture device, but I am having problems with underruns. It has actually ended up being a non-trivial exercise delivering audio from a tuner to the sound card with less than 30ms of latency (required… Read More
tvtime audio
Probably one of the most popular questions I see new users ask about tvtime is along the lines of the following: It looks like tvtime is working (showing me video), but for some reason I am not hearing any audio. What is wrong with my tuner? Unfortunately, in the vast majority of cases, there is… Read More