README
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- IMPORTANT: Don't send me mails with images attached unless I ask you
- to do so. Mails with images attached will go to /dev/null unseen.
- Release notes for bttv-0.7.x
- ============================
- This version is based on Ralphs 0.6.4 release. There are alot of
- changes. Bugfixes, merged patches from other people, merged fixes
- from the kernel version, port to the new i2c stack, removed support
- for 2.0.x, code cleanups, ...
- To compile this bttv version, you'll the new i2c stack. Kernels
- newer than 2.3.34 have this already included. If you have a older
- kernel, download it from:
- http://www2.lm-sensors.nu/~lm78/download.html
- You'll need at least these config options for bttv:
- CONFIG_I2C=m
- CONFIG_I2C_ALGOBIT=m
- CONFIG_VIDEO_DEV=m
- The latest bttv version is available from http://bytesex.org/bttv/
- You'll find Ralphs original (mostly outdated) documentation in the
- ralphs-doc subdirectory.
- Compile bttv
- ------------
- If you are compiling the kernel version, just say 'm' if you are asked
- for bttv. I /strongly/ recommend to compile bttv as module, because
- there are some insmod options for configuring the driver. Starting
- with 0.7.49 the most important ones are available as kernel args too.
- If you downloaded the separate bttv bundle: You need configured kernel
- sources to compile the bttv driver. The driver uses some Makefile
- magic to compile the modules with your kernel's configuration
- (wrt. module-versions, SMP, ...). If you already have compiled the
- kernel at least once, you probably don't have do worry about this. If
- not, go to /usr/src/linux and run at least "make config". Even
- better, compile your own kernel, you'll never become a real hacker
- else ;-)
- Note that you have to turn on video4linux support (CONFIG_VIDEO_DEV)
- in the kernel to get the videodev.o module which is required by bttv.
- Make bttv work with your card
- -----------------------------
- Setup your /etc/modules.conf file and let kmod load the modules.
- See also:
- Modules.conf: some sample entries for /etc/modules.conf
- Insmod-options: list of all insmod options available for bttv and
- the helper modules.
- MAKEDEV: a script to create the special files for v4l
- CARDLIST: List of all supported cards
- Cards: more detailed descriptions of known TV cards:
- OEM name variants, used i2c chips, ...
- also includes non-bttv cards.
- Loading just the bttv modules isn't enouth for most cards. The
- drivers for the i2c tuner/sound chips must also be loaded. bttv tries
- to load them automagically by calling request_module() now, but this
- obviously works only with kmod enabled.
- If bttv takes very long to load (happens sometimes with the cheap
- cards which have no tuner), try adding this to your modules.conf:
- options i2c-algo-bit bit_test=1
- The most important insmod option for bttv is "card=n" to select the
- correct card type in case the autodetection does'nt work. If you get
- video but no sound you've very likely specified the wrong (or no)
- card type. A list of supported cards is in CARDLIST.
- For the WinTV/PVR you need one firmware file from the driver CD:
- hcwamc.rbf. The file is in the pvr45xxx.exe archive (self-extracting
- zip file, unzip can unpack it). Put it into the /etc/pvr directory or
- use the firm_altera=<path> insmod option to point the driver to the
- location of the file.
- If your card isn't listed in CARDLIST or if you have trouble making
- audio work, you should read the Sound-FAQ.
- Autodetecting cards
- -------------------
- bttv uses the PCI Subsystem ID to autodetect the card type. lspci lists
- the Subsystem ID in the second line, looks like this:
- 00:0a.0 Multimedia video controller: Brooktree Corporation Bt878 (rev 02)
- Subsystem: Hauppauge computer works Inc. WinTV/GO
- Flags: bus master, medium devsel, latency 32, IRQ 5
- Memory at e2000000 (32-bit, prefetchable) [size=4K]
- only bt878-based cards can have a subsystem ID (which does not mean
- that every card really has one). bt848 cards can't have a Subsystem
- ID and therefore can't be autodetected. There is a list with the ID's
- in bttv-cards.c (in case you are intrested or want to mail patches
- with updates).
- Old driver versions used to have a heuristic which could identify some
- bt848-based cards. It worked for Hauppauge and Miro cards in most
- cases (simply because these where the first cards available on the
- market), but misdetected other bt848 cards. That code is gone now for
- exactly this reason, the misdetection confused lots of people. If you
- have a old Hauppauge or Miro card, you'll have to load the driver with
- card=1 or card=2 these days.
- Still doesn't work?
- -------------------
- I do NOT have a lab with 30+ different grabber boards and a
- PAL/NTSC/SECAM test signal generator at home, so I often can't
- reproduce your problems. This makes debugging very difficult for me.
- If you have some knowledge and spare time, please try to fix this
- yourself (patches very welcome of course...) You know: The linux
- slogan is "Do it yourself".
- There is a mailing list: video4linux-list@redhat.com.
- https://listman.redhat.com/mailman/listinfo/video4linux-list
- If you have trouble with some specific TV card, try to ask there
- instead of mailing me directly. The chance that someone with the
- same card listens there is much higher...
- For problems with sound: There are alot of different systems used
- for TV sound all over the world. And there are also different chips
- which decode the audio signal. Reports about sound problems ("stereo
- does'nt work") are pretty useless unless you include some details
- about your hardware and the TV sound scheme used in your country (or
- at least the country you are living in).
- Finally: If you mail some patches for bttv around the world (to
- linux-kernel/Alan/Linus/...), please Cc: me.
- Have fun with bttv,
- Gerd
- --
- Gerd Knorr <kraxel@goldbach.in-berlin.de>