diff options
Diffstat (limited to 'Documentation/video4linux/Zoran')
| -rw-r--r-- | Documentation/video4linux/Zoran | 557 |
1 files changed, 557 insertions, 0 deletions
diff --git a/Documentation/video4linux/Zoran b/Documentation/video4linux/Zoran new file mode 100644 index 0000000..01425c2 --- /dev/null +++ b/Documentation/video4linux/Zoran @@ -0,0 +1,557 @@ +Frequently Asked Questions: +=========================== +subject: unified zoran driver (zr360x7, zoran, buz, dc10(+), dc30(+), lml33) +website: http://mjpeg.sourceforge.net/driver-zoran/ + +1. What cards are supported +1.1 What the TV decoder can do an what not +1.2 What the TV encoder can do an what not +2. How do I get this damn thing to work +3. What mainboard should I use (or why doesn't my card work) +4. Programming interface +5. Applications +6. Concerning buffer sizes, quality, output size etc. +7. It hangs/crashes/fails/whatevers! Help! +8. Maintainers/Contacting +9. License + +=========================== + +1. What cards are supported + +Iomega Buz, Linux Media Labs LML33/LML33R10, Pinnacle/Miro +DC10/DC10+/DC30/DC30+ and related boards (available under various names). + +Iomega Buz: +* Zoran zr36067 PCI controller +* Zoran zr36060 MJPEG codec +* Philips saa7111 TV decoder +* Philips saa7185 TV encoder +Drivers to use: videodev, i2c-core, i2c-algo-bit, + videocodec, saa7111, saa7185, zr36060, zr36067 +Inputs/outputs: Composite and S-video +Norms: PAL, SECAM (720x576 @ 25 fps), NTSC (720x480 @ 29.97 fps) +Card number: 7 + +Linux Media Labs LML33: +* Zoran zr36067 PCI controller +* Zoran zr36060 MJPEG codec +* Brooktree bt819 TV decoder +* Brooktree bt856 TV encoder +Drivers to use: videodev, i2c-core, i2c-algo-bit, + videocodec, bt819, bt856, zr36060, zr36067 +Inputs/outputs: Composite and S-video +Norms: PAL (720x576 @ 25 fps), NTSC (720x480 @ 29.97 fps) +Card number: 5 + +Linux Media Labs LML33R10: +* Zoran zr36067 PCI controller +* Zoran zr36060 MJPEG codec +* Philips saa7114 TV decoder +* Analog Devices adv7170 TV encoder +Drivers to use: videodev, i2c-core, i2c-algo-bit, + videocodec, saa7114, adv7170, zr36060, zr36067 +Inputs/outputs: Composite and S-video +Norms: PAL (720x576 @ 25 fps), NTSC (720x480 @ 29.97 fps) +Card number: 6 + +Pinnacle/Miro DC10(new): +* Zoran zr36057 PCI controller +* Zoran zr36060 MJPEG codec +* Philips saa7110a TV decoder +* Analog Devices adv7176 TV encoder +Drivers to use: videodev, i2c-core, i2c-algo-bit, + videocodec, saa7110, adv7175, zr36060, zr36067 +Inputs/outputs: Composite, S-video and Internal +Norms: PAL, SECAM (768x576 @ 25 fps), NTSC (640x480 @ 29.97 fps) +Card number: 1 + +Pinnacle/Miro DC10+: +* Zoran zr36067 PCI controller +* Zoran zr36060 MJPEG codec +* Philips saa7110a TV decoder +* Analog Devices adv7176 TV encoder +Drivers to use: videodev, i2c-core, i2c-algo-bit, + videocodec, sa7110, adv7175, zr36060, zr36067 +Inputs/outputs: Composite, S-video and Internal +Norms: PAL, SECAM (768x576 @ 25 fps), NTSC (640x480 @ 29.97 fps) +Card number: 2 + +Pinnacle/Miro DC10(old): * +* Zoran zr36057 PCI controller +* Zoran zr36050 MJPEG codec +* Zoran zr36016 Video Front End or Fuji md0211 Video Front End (clone?) +* Micronas vpx3220a TV decoder +* mse3000 TV encoder or Analog Devices adv7176 TV encoder * +Drivers to use: videodev, i2c-core, i2c-algo-bit, + videocodec, vpx3220, mse3000/adv7175, zr36050, zr36016, zr36067 +Inputs/outputs: Composite, S-video and Internal +Norms: PAL, SECAM (768x576 @ 25 fps), NTSC (640x480 @ 29.97 fps) +Card number: 0 + +Pinnacle/Miro DC30: * +* Zoran zr36057 PCI controller +* Zoran zr36050 MJPEG codec +* Zoran zr36016 Video Front End +* Micronas vpx3225d/vpx3220a/vpx3216b TV decoder +* Analog Devices adv7176 TV encoder +Drivers to use: videodev, i2c-core, i2c-algo-bit, + videocodec, vpx3220/vpx3224, adv7175, zr36050, zr36016, zr36067 +Inputs/outputs: Composite, S-video and Internal +Norms: PAL, SECAM (768x576 @ 25 fps), NTSC (640x480 @ 29.97 fps) +Card number: 3 + +Pinnacle/Miro DC30+: * +* Zoran zr36067 PCI controller +* Zoran zr36050 MJPEG codec +* Zoran zr36016 Video Front End +* Micronas vpx3225d/vpx3220a/vpx3216b TV decoder +* Analog Devices adv7176 TV encoder +Drivers to use: videodev, i2c-core, i2c-algo-bit, + videocodec, vpx3220/vpx3224, adv7175, zr36050, zr36015, zr36067 +Inputs/outputs: Composite, S-video and Internal +Norms: PAL, SECAM (768x576 @ 25 fps), NTSC (640x480 @ 29.97 fps) +Card number: 4 + +Note: No module for the mse3000 is available yet +Note: No module for the vpx3224 is available yet +Note: use encoder=X or decoder=X for non-default i2c chips (see i2c-id.h) + +=========================== + +1.1 What the TV decoder can do an what not + +The best know TV standards are NTSC/PAL/SECAM. but for decoding a frame that +information is not enough. There are several formats of the TV standards. +And not every TV decoder is able to handle every format. Also the every +combination is supported by the driver. There are currently 11 different +tv broadcast formats all aver the world. + +The CCIR defines parameters needed for broadcasting the signal. +The CCIR has defined different standards: A,B,D,E,F,G,D,H,I,K,K1,L,M,N,... +The CCIR says not much about about the colorsystem used !!! +And talking about a colorsystem says not to much about how it is broadcast. + +The CCIR standards A,E,F are not used any more. + +When you speak about NTSC, you usually mean the standard: CCIR - M using +the NTSC colorsystem which is used in the USA, Japan, Mexico, Canada +and a few others. + +When you talk about PAL, you usually mean: CCIR - B/G using the PAL +colorsystem which is used in many Countries. + +When you talk about SECAM, you mean: CCIR - L using the SECAM Colorsystem +which is used in France, and a few others. + +There the other version of SECAM, CCIR - D/K is used in Bulgaria, China, +Slovakai, Hungary, Korea (Rep.), Poland, Rumania and a others. + +The CCIR - H uses the PAL colorsystem (sometimes SECAM) and is used in +Egypt, Libya, Sri Lanka, Syrain Arab. Rep. + +The CCIR - I uses the PAL colorsystem, and is used in Great Britain, Hong Kong, +Ireland, Nigeria, South Africa. + +The CCIR - N uses the PAL colorsystem and PAL frame size but the NTSC framerate, +and is used in Argentinia, Uruguay, an a few others + +We do not talk about how the audio is broadcast ! + +A rather good sites about the TV standards are: +http://www.sony.jp/ServiceArea/Voltage_map/ +http://info.electronicwerkstatt.de/bereiche/fernsehtechnik/frequenzen_und_normen/Fernsehnormen/ +and http://www.cabl.com/restaurant/channel.html + +Other weird things around: NTSC 4.43 is a modificated NTSC, which is mainly +used in PAL VCR's that are able to play back NTSC. PAL 60 seems to be the same +as NTSC 4.43 . The Datasheets also talk about NTSC 44, It seems as if it would +be the same as NTSC 4.43. +NTSC Combs seems to be a decoder mode where the decoder uses a comb filter +to split coma and luma instead of a Delay line. + +But I did not defiantly find out what NTSC Comb is. + +Philips saa7111 TV decoder +was introduced in 1997, is used in the BUZ and +can handle: PAL B/G/H/I, PAL N, PAL M, NTSC M, NTSC N, NTSC 4.43 and SECAM + +Philips saa7110a TV decoder +was introduced in 1995, is used in the Pinnacle/Miro DC10(new), DC10+ and +can handle: PAL B/G, NTSC M and SECAM + +Philips saa7114 TV decoder +was introduced in 2000, is used in the LML33R10 and +can handle: PAL B/G/D/H/I/N, PAL N, PAL M, NTSC M, NTSC 4.43 and SECAM + +Brooktree bt819 TV decoder +was introduced in 1996, and is used in the LML33 and +can handle: PAL B/D/G/H/I, NTSC M + +Micronas vpx3220a TV decoder +was introduced in 1996, is used in the DC30 and DC30+ and +can handle: PAL B/G/H/I, PAL N, PAL M, NTSC M, NTSC 44, PAL 60, SECAM,NTSC Comb + +=========================== + +1.2 What the TV encoder can do an what not + +The TV encoder are doing the "same" as the decoder, but in the oder direction. +You feed them digital data and the generate a Composite or SVHS signal. +For information about the colorsystems and TV norm take a look in the +TV decoder section. + +Philips saa7185 TV Encoder +was introduced in 1996, is used in the BUZ +can generate: PAL B/G, NTSC M + +Brooktree bt856 TV Encoder +was introduced in 1994, is used in the LML33 +can generate: PAL B/D/G/H/I/N, PAL M, NTSC M, PAL-N (Argentina) + +Analog Devices adv7170 TV Encoder +was introduced in 2000, is used in the LML300R10 +can generate: PAL B/D/G/H/I/N, PAL M, NTSC M, PAL 60 + +Analog Devices adv7175 TV Encoder +was introduced in 1996, is used in the DC10, DC10+, DC10 old, DC30, DC30+ +can generate: PAL B/D/G/H/I/N, PAL M, NTSC M + +ITT mse3000 TV encoder +was introduced in 1991, is used in the DC10 old +can generate: PAL , NTSC , SECAM + +The adv717x, should be able to produce PAL N. But you find nothing PAL N +specific in the the registers. Seem that you have to reuse a other standard +to generate PAL N, maybe it would work if you use the PAL M settings. + +========================== + +2. How do I get this damn thing to work + +Load zr36067.o. If it can't autodetect your card, use the card=X insmod +option with X being the card number as given in the previous section. +To have more than one card, use card=X1[,X2[,X3,[X4[..]]]] + +To automate this, add the following to your /etc/modprobe.conf: + +options zr36067 card=X1[,X2[,X3[,X4[..]]]] +alias char-major-81-0 zr36067 + +One thing to keep in mind is that this doesn't load zr36067.o itself yet. It +just automates loading. If you start using xawtv, the device won't load on +some systems, since you're trying to load modules as a user, which is not +allowed ("permission denied"). A quick workaround is to add 'Load "v4l"' to +XF86Config-4 when you use X by default, or to run 'v4l-conf -c <device>' in +one of your startup scripts (normally rc.local) if you don't use X. Both +make sure that the modules are loaded on startup, under the root account. + +=========================== + +3. What mainboard should I use (or why doesn't my card work) + +<insert lousy disclaimer here>. In short: good=SiS/Intel, bad=VIA. + +Experience tells us that people with a Buz, on average, have more problems +than users with a DC10+/LML33. Also, it tells us that people owning a VIA- +based mainboard (ktXXX, MVP3) have more problems than users with a mainboard +based on a different chipset. Here's some notes from Andrew Stevens: +-- +Here's my experience of using LML33 and Buz on various motherboards: + +VIA MVP3 + Forget it. Pointless. Doesn't work. +Intel 430FX (Pentium 200) + LML33 perfect, Buz tolerable (3 or 4 frames dropped per movie) +Intel 440BX (early stepping) + LML33 tolerable. Buz starting to get annoying (6-10 frames/hour) +Intel 440BX (late stepping) + Buz tolerable, LML3 almost perfect (occasional single frame drops) +SiS735 + LML33 perfect, Buz tolerable. +VIA KT133(*) + LML33 starting to get annoying, Buz poor enough that I have up. + +Both 440BX boards were dual CPU versions. +-- +Bernhard Praschinger later added: +-- +AMD 751 + Buz perfect-tolerable +AMD 760 + Buz perfect-tolerable +-- +In general, people on the user mailinglist won't give you much of a chance +if you have a VIA-based motherboard. They may be cheap, but sometimes, you'd +rather want to spend some more money on better boards. In general, VIA +mainboard's IDE/PCI performance will also suck badly compared to others. +You'll noticed the DC10+/DC30+ aren't mentioned anywhere in the overview. +Basically, you can assume that if the Buz works, the LML33 will work too. If +the LML33 works, the DC10+/DC30+ will work too. They're most tolerant to +different mainboard chipsets from all of the supported cards. + +If you experience timeouts during capture, buy a better mainboard or lower +the quality/buffersize during capture (see 'Concerning buffer sizes, quality, +output size etc.'). If it hangs, there's little we can do as of now. Check +your IRQs and make sure the card has its own interrupts. + +=========================== + +4. Programming interface + +This driver conforms to video4linux and video4linux2, both can be used to +use the driver. Since video4linux didn't provide adequate calls to fully +use the cards' features, we've introduced several programming extensions, +which are currently officially accepted in the 2.4.x branch of the kernel. +These extensions are known as the v4l/mjpeg extensions. See zoran.h for +details (structs/ioctls). + +Information - video4linux: +http://roadrunner.swansea.linux.org.uk/v4lapi.shtml +Documentation/video4linux/API.html +/usr/include/linux/videodev.h + +Information - video4linux/mjpeg extensions: +./zoran.h +(also see below) + +Information - video4linux2: +http://www.thedirks.org/v4l2/ +/usr/include/linux/videodev2.h +http://www.bytesex.org/v4l/ + +More information on the video4linux/mjpeg extensions, by Serguei +Miridonovi and Rainer Johanni: +-- +The ioctls for that interface are as follows: + +BUZIOC_G_PARAMS +BUZIOC_S_PARAMS + +Get and set the parameters of the buz. The user should always do a +BUZIOC_G_PARAMS (with a struct buz_params) to obtain the default +settings, change what he likes and then make a BUZIOC_S_PARAMS call. + +BUZIOC_REQBUFS + +Before being able to capture/playback, the user has to request +the buffers he is wanting to use. Fill the structure +zoran_requestbuffers with the size (recommended: 256*1024) and +the number (recommended 32 up to 256). There are no such restrictions +as for the Video for Linux buffers, you should LEAVE SUFFICIENT +MEMORY for your system however, else strange things will happen .... +On return, the zoran_requestbuffers structure contains number and +size of the actually allocated buffers. +You should use these numbers for doing a mmap of the buffers +into the user space. +The BUZIOC_REQBUFS ioctl also makes it happen, that the next mmap +maps the MJPEG buffer instead of the V4L buffers. + +BUZIOC_QBUF_CAPT +BUZIOC_QBUF_PLAY + +Queue a buffer for capture or playback. The first call also starts +streaming capture. When streaming capture is going on, you may +only queue further buffers or issue syncs until streaming +capture is switched off again with a argument of -1 to +a BUZIOC_QBUF_CAPT/BUZIOC_QBUF_PLAY ioctl. + +BUZIOC_SYNC + +Issue this ioctl when all buffers are queued. This ioctl will +block until the first buffer becomes free for saving its +data to disk (after BUZIOC_QBUF_CAPT) or for reuse (after BUZIOC_QBUF_PLAY). + +BUZIOC_G_STATUS + +Get the status of the input lines (video source connected/norm). + +For programming example, please, look at lavrec.c and lavplay.c code in +lavtools-1.2p2 package (URL: http://www.cicese.mx/~mirsev/DC10plus/) +and the 'examples' directory in the original Buz driver distribution. + +Additional notes for software developers: + + The driver returns maxwidth and maxheight parameters according to + the current TV standard (norm). Therefore, the software which + communicates with the driver and "asks" for these parameters should + first set the correct norm. Well, it seems logically correct: TV + standard is "more constant" for current country than geometry + settings of a variety of TV capture cards which may work in ITU or + square pixel format. Remember that users now can lock the norm to + avoid any ambiguity. +-- +Please note that lavplay/lavrec are also included in the MJPEG-tools +(http://mjpeg.sf.net/). + +=========================== + +5. Applications + +Applications known to work with this driver: + +TV viewing: +* xawtv +* kwintv +* probably any TV application that supports video4linux or video4linux2. + +MJPEG capture/playback: +* mjpegtools/lavtools (or Linux Video Studio) +* gstreamer +* mplayer + +General raw capture: +* xawtv +* gstreamer +* probably any application that supports video4linux or video4linux2 + +Video editing: +* Cinelerra +* MainActor +* mjpegtools (or Linux Video Studio) + +=========================== + +6. Concerning buffer sizes, quality, output size etc. + +The zr36060 can do 1:2 JPEG compression. This is really the theoretical +maximum that the chipset can reach. The driver can, however, limit compression +to a maximum (size) of 1:4. The reason for this is that some cards (e.g. Buz) +can't handle 1:2 compression without stopping capture after only a few minutes. +With 1:4, it'll mostly work. If you have a Buz, use 'low_bitrate=1' to go into +1:4 max. compression mode. + +100% JPEG quality is thus 1:2 compression in practice. So for a full PAL frame +(size 720x576). The JPEG fields are stored in YUY2 format, so the size of the +fields are 720x288x16/2 bits/field (2 fields/frame) = 207360 bytes/field x 2 = +414720 bytes/frame (add some more bytes for headers and DHT (huffman)/DQT +(quantization) tables, and you'll get to something like 512kB per frame for +1:2 compression. For 1:4 compression, you'd have frames of half this size. + +Some additional explanation by Martin Samuelsson, which also explains the +importance of buffer sizes: +-- +> Hmm, I do not think it is really that way. With the current (downloaded +> at 18:00 Monday) driver I get that output sizes for 10 sec: +> -q 50 -b 128 : 24.283.332 Bytes +> -q 50 -b 256 : 48.442.368 +> -q 25 -b 128 : 24.655.992 +> -q 25 -b 256 : 25.859.820 + +I woke up, and can't go to sleep again. I'll kill some time explaining why +this doesn't look strange to me. + +Let's do some math using a width of 704 pixels. I'm not sure whether the Buz +actually use that number or not, but that's not too important right now. + +704x288 pixels, one field, is 202752 pixels. Divided by 64 pixels per block; +3168 blocks per field. Each pixel consist of two bytes; 128 bytes per block; +1024 bits per block. 100% in the new driver mean 1:2 compression; the maximum +output becomes 512 bits per block. Actually 510, but 512 is simpler to use +for calculations. + +Let's say that we specify d1q50. We thus want 256 bits per block; times 3168 +becomes 811008 bits; 101376 bytes per field. We're talking raw bits and bytes +here, so we don't need to do any fancy corrections for bits-per-pixel or such +things. 101376 bytes per field. + +d1 video contains two fields per frame. Those sum up to 202752 bytes per +frame, and one of those frames goes into each buffer. + +But wait a second! -b128 gives 128kB buffers! It's not possible to cram +202752 bytes of JPEG data into 128kB! + +This is what the driver notice and automatically compensate for in your +examples. Let's do some math using this information: + +128kB is 131072 bytes. In this buffer, we want to store two fields, which +leaves 65536 bytes for each field. Using 3168 blocks per field, we get +20.68686868... available bytes per block; 165 bits. We can't allow the +request for 256 bits per block when there's only 165 bits available! The -q50 +option is silently overridden, and the -b128 option takes precedence, leaving +us with the equivalence of -q32. + +This gives us a data rate of 165 bits per block, which, times 3168, sums up +to 65340 bytes per field, out of the allowed 65536. The current driver has +another level of rate limiting; it won't accept -q values that fill more than +6/8 of the specified buffers. (I'm not sure why. "Playing it safe" seem to be +a safe bet. Personally, I think I would have lowered requested-bits-per-block +by one, or something like that.) We can't use 165 bits per block, but have to +lower it again, to 6/8 of the available buffer space: We end up with 124 bits +per block, the equivalence of -q24. With 128kB buffers, you can't use greater +than -q24 at -d1. (And PAL, and 704 pixels width...) + +The third example is limited to -q24 through the same process. The second +example, using very similar calculations, is limited to -q48. The only +example that actually grab at the specified -q value is the last one, which +is clearly visible, looking at the file size. +-- + +Conclusion: the quality of the resulting movie depends on buffer size, quality, +whether or not you use 'low_bitrate=1' as insmod option for the zr36060.c +module to do 1:4 instead of 1:2 compression, etc. + +If you experience timeouts, lowering the quality/buffersize or using +'low_bitrate=1 as insmod option for zr36060.o might actually help, as is +proven by the Buz. + +=========================== + +7. It hangs/crashes/fails/whatevers! Help! + +Make sure that the card has its own interrupts (see /proc/interrupts), check +the output of dmesg at high verbosity (load zr36067.o with debug=2, +load all other modules with debug=1). Check that your mainboard is favorable +(see question 2) and if not, test the card in another computer. Also see the +notes given in question 3 and try lowering quality/buffersize/capturesize +if recording fails after a period of time. + +If all this doesn't help, give a clear description of the problem including +detailed hardware information (memory+brand, mainboard+chipset+brand, which +MJPEG card, processor, other PCI cards that might be of interest), give the +system PnP information (/proc/interrupts, /proc/dma, /proc/devices), and give +the kernel version, driver version, glibc version, gcc version and any other +information that might possibly be of interest. Also provide the dmesg output +at high verbosity. See 'Contacting' on how to contact the developers. + +=========================== + +8. Maintainers/Contacting + +The driver is currently maintained by Laurent Pinchart and Ronald Bultje +(<laurent.pinchart@skynet.be> and <rbultje@ronald.bitfreak.net>). For bug +reports or questions, please contact the mailinglist instead of the developers +individually. For user questions (i.e. bug reports or how-to questions), send +an email to <mjpeg-users@lists.sf.net>, for developers (i.e. if you want to +help programming), send an email to <mjpeg-developer@lists.sf.net>. See +http://www.sf.net/projects/mjpeg/ for subscription information. + +For bug reports, be sure to include all the information as described in +the section 'It hangs/crashes/fails/whatevers! Help!'. Please make sure +you're using the latest version (http://mjpeg.sf.net/driver-zoran/). + +Previous maintainers/developers of this driver include Serguei Miridonov +<mirsev@cicese.mx>, Wolfgang Scherr <scherr@net4you.net>, Dave Perks +<dperks@ibm.net> and Rainer Johanni <Rainer@Johanni.de>. + +=========================== + +9. License + +This driver is distributed under the terms of the General Public License. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +See http://www.gnu.org/ for more information. |
