Root/Documentation/video4linux/Zoran

1Frequently Asked Questions:
2===========================
3subject: unified zoran driver (zr360x7, zoran, buz, dc10(+), dc30(+), lml33)
4website: http://mjpeg.sourceforge.net/driver-zoran/
5
61. What cards are supported
71.1 What the TV decoder can do an what not
81.2 What the TV encoder can do an what not
92. How do I get this damn thing to work
103. What mainboard should I use (or why doesn't my card work)
114. Programming interface
125. Applications
136. Concerning buffer sizes, quality, output size etc.
147. It hangs/crashes/fails/whatevers! Help!
158. Maintainers/Contacting
169. License
17
18===========================
19
201. What cards are supported
21
22Iomega Buz, Linux Media Labs LML33/LML33R10, Pinnacle/Miro
23DC10/DC10+/DC30/DC30+ and related boards (available under various names).
24
25Iomega Buz:
26* Zoran zr36067 PCI controller
27* Zoran zr36060 MJPEG codec
28* Philips saa7111 TV decoder
29* Philips saa7185 TV encoder
30Drivers to use: videodev, i2c-core, i2c-algo-bit,
31        videocodec, saa7111, saa7185, zr36060, zr36067
32Inputs/outputs: Composite and S-video
33Norms: PAL, SECAM (720x576 @ 25 fps), NTSC (720x480 @ 29.97 fps)
34Card number: 7
35
36AverMedia 6 Eyes AVS6EYES:
37* Zoran zr36067 PCI controller
38* Zoran zr36060 MJPEG codec
39* Samsung ks0127 TV decoder
40* Conexant bt866 TV encoder
41Drivers to use: videodev, i2c-core, i2c-algo-bit,
42        videocodec, ks0127, bt866, zr36060, zr36067
43Inputs/outputs: Six physical inputs. 1-6 are composite,
44        1-2, 3-4, 5-6 doubles as S-video,
45        1-3 triples as component.
46        One composite output.
47Norms: PAL, SECAM (720x576 @ 25 fps), NTSC (720x480 @ 29.97 fps)
48Card number: 8
49Not autodetected, card=8 is necessary.
50
51Linux Media Labs LML33:
52* Zoran zr36067 PCI controller
53* Zoran zr36060 MJPEG codec
54* Brooktree bt819 TV decoder
55* Brooktree bt856 TV encoder
56Drivers to use: videodev, i2c-core, i2c-algo-bit,
57        videocodec, bt819, bt856, zr36060, zr36067
58Inputs/outputs: Composite and S-video
59Norms: PAL (720x576 @ 25 fps), NTSC (720x480 @ 29.97 fps)
60Card number: 5
61
62Linux Media Labs LML33R10:
63* Zoran zr36067 PCI controller
64* Zoran zr36060 MJPEG codec
65* Philips saa7114 TV decoder
66* Analog Devices adv7170 TV encoder
67Drivers to use: videodev, i2c-core, i2c-algo-bit,
68        videocodec, saa7114, adv7170, zr36060, zr36067
69Inputs/outputs: Composite and S-video
70Norms: PAL (720x576 @ 25 fps), NTSC (720x480 @ 29.97 fps)
71Card number: 6
72
73Pinnacle/Miro DC10(new):
74* Zoran zr36057 PCI controller
75* Zoran zr36060 MJPEG codec
76* Philips saa7110a TV decoder
77* Analog Devices adv7176 TV encoder
78Drivers to use: videodev, i2c-core, i2c-algo-bit,
79        videocodec, saa7110, adv7175, zr36060, zr36067
80Inputs/outputs: Composite, S-video and Internal
81Norms: PAL, SECAM (768x576 @ 25 fps), NTSC (640x480 @ 29.97 fps)
82Card number: 1
83
84Pinnacle/Miro DC10+:
85* Zoran zr36067 PCI controller
86* Zoran zr36060 MJPEG codec
87* Philips saa7110a TV decoder
88* Analog Devices adv7176 TV encoder
89Drivers to use: videodev, i2c-core, i2c-algo-bit,
90        videocodec, sa7110, adv7175, zr36060, zr36067
91Inputs/outputs: Composite, S-video and Internal
92Norms: PAL, SECAM (768x576 @ 25 fps), NTSC (640x480 @ 29.97 fps)
93Card number: 2
94
95Pinnacle/Miro DC10(old): *
96* Zoran zr36057 PCI controller
97* Zoran zr36050 MJPEG codec
98* Zoran zr36016 Video Front End or Fuji md0211 Video Front End (clone?)
99* Micronas vpx3220a TV decoder
100* mse3000 TV encoder or Analog Devices adv7176 TV encoder *
101Drivers to use: videodev, i2c-core, i2c-algo-bit,
102        videocodec, vpx3220, mse3000/adv7175, zr36050, zr36016, zr36067
103Inputs/outputs: Composite, S-video and Internal
104Norms: PAL, SECAM (768x576 @ 25 fps), NTSC (640x480 @ 29.97 fps)
105Card number: 0
106
107Pinnacle/Miro DC30: *
108* Zoran zr36057 PCI controller
109* Zoran zr36050 MJPEG codec
110* Zoran zr36016 Video Front End
111* Micronas vpx3225d/vpx3220a/vpx3216b TV decoder
112* Analog Devices adv7176 TV encoder
113Drivers to use: videodev, i2c-core, i2c-algo-bit,
114        videocodec, vpx3220/vpx3224, adv7175, zr36050, zr36016, zr36067
115Inputs/outputs: Composite, S-video and Internal
116Norms: PAL, SECAM (768x576 @ 25 fps), NTSC (640x480 @ 29.97 fps)
117Card number: 3
118
119Pinnacle/Miro DC30+: *
120* Zoran zr36067 PCI controller
121* Zoran zr36050 MJPEG codec
122* Zoran zr36016 Video Front End
123* Micronas vpx3225d/vpx3220a/vpx3216b TV decoder
124* Analog Devices adv7176 TV encoder
125Drivers to use: videodev, i2c-core, i2c-algo-bit,
126        videocodec, vpx3220/vpx3224, adv7175, zr36050, zr36015, zr36067
127Inputs/outputs: Composite, S-video and Internal
128Norms: PAL, SECAM (768x576 @ 25 fps), NTSC (640x480 @ 29.97 fps)
129Card number: 4
130
131Note: No module for the mse3000 is available yet
132Note: No module for the vpx3224 is available yet
133
134===========================
135
1361.1 What the TV decoder can do an what not
137
138The best know TV standards are NTSC/PAL/SECAM. but for decoding a frame that
139information is not enough. There are several formats of the TV standards.
140And not every TV decoder is able to handle every format. Also the every
141combination is supported by the driver. There are currently 11 different
142tv broadcast formats all aver the world.
143
144The CCIR defines parameters needed for broadcasting the signal.
145The CCIR has defined different standards: A,B,D,E,F,G,D,H,I,K,K1,L,M,N,...
146The CCIR says not much about the colorsystem used !!!
147And talking about a colorsystem says not to much about how it is broadcast.
148
149The CCIR standards A,E,F are not used any more.
150
151When you speak about NTSC, you usually mean the standard: CCIR - M using
152the NTSC colorsystem which is used in the USA, Japan, Mexico, Canada
153and a few others.
154
155When you talk about PAL, you usually mean: CCIR - B/G using the PAL
156colorsystem which is used in many Countries.
157
158When you talk about SECAM, you mean: CCIR - L using the SECAM Colorsystem
159which is used in France, and a few others.
160
161There the other version of SECAM, CCIR - D/K is used in Bulgaria, China,
162Slovakai, Hungary, Korea (Rep.), Poland, Rumania and a others.
163
164The CCIR - H uses the PAL colorsystem (sometimes SECAM) and is used in
165Egypt, Libya, Sri Lanka, Syrain Arab. Rep.
166
167The CCIR - I uses the PAL colorsystem, and is used in Great Britain, Hong Kong,
168Ireland, Nigeria, South Africa.
169
170The CCIR - N uses the PAL colorsystem and PAL frame size but the NTSC framerate,
171and is used in Argentinia, Uruguay, an a few others
172
173We do not talk about how the audio is broadcast !
174
175A rather good sites about the TV standards are:
176http://www.sony.jp/support/
177http://info.electronicwerkstatt.de/bereiche/fernsehtechnik/frequenzen_und_normen/Fernsehnormen/
178and http://www.cabl.com/restaurant/channel.html
179
180Other weird things around: NTSC 4.43 is a modificated NTSC, which is mainly
181used in PAL VCR's that are able to play back NTSC. PAL 60 seems to be the same
182as NTSC 4.43 . The Datasheets also talk about NTSC 44, It seems as if it would
183be the same as NTSC 4.43.
184NTSC Combs seems to be a decoder mode where the decoder uses a comb filter
185to split coma and luma instead of a Delay line.
186
187But I did not defiantly find out what NTSC Comb is.
188
189Philips saa7111 TV decoder
190was introduced in 1997, is used in the BUZ and
191can handle: PAL B/G/H/I, PAL N, PAL M, NTSC M, NTSC N, NTSC 4.43 and SECAM
192
193Philips saa7110a TV decoder
194was introduced in 1995, is used in the Pinnacle/Miro DC10(new), DC10+ and
195can handle: PAL B/G, NTSC M and SECAM
196
197Philips saa7114 TV decoder
198was introduced in 2000, is used in the LML33R10 and
199can handle: PAL B/G/D/H/I/N, PAL N, PAL M, NTSC M, NTSC 4.43 and SECAM
200
201Brooktree bt819 TV decoder
202was introduced in 1996, and is used in the LML33 and
203can handle: PAL B/D/G/H/I, NTSC M
204
205Micronas vpx3220a TV decoder
206was introduced in 1996, is used in the DC30 and DC30+ and
207can handle: PAL B/G/H/I, PAL N, PAL M, NTSC M, NTSC 44, PAL 60, SECAM,NTSC Comb
208
209Samsung ks0127 TV decoder
210is used in the AVS6EYES card and
211can handle: NTSC-M/N/44, PAL-M/N/B/G/H/I/D/K/L and SECAM
212
213===========================
214
2151.2 What the TV encoder can do an what not
216
217The TV encoder are doing the "same" as the decoder, but in the oder direction.
218You feed them digital data and the generate a Composite or SVHS signal.
219For information about the colorsystems and TV norm take a look in the
220TV decoder section.
221
222Philips saa7185 TV Encoder
223was introduced in 1996, is used in the BUZ
224can generate: PAL B/G, NTSC M
225
226Brooktree bt856 TV Encoder
227was introduced in 1994, is used in the LML33
228can generate: PAL B/D/G/H/I/N, PAL M, NTSC M, PAL-N (Argentina)
229
230Analog Devices adv7170 TV Encoder
231was introduced in 2000, is used in the LML300R10
232can generate: PAL B/D/G/H/I/N, PAL M, NTSC M, PAL 60
233
234Analog Devices adv7175 TV Encoder
235was introduced in 1996, is used in the DC10, DC10+, DC10 old, DC30, DC30+
236can generate: PAL B/D/G/H/I/N, PAL M, NTSC M
237
238ITT mse3000 TV encoder
239was introduced in 1991, is used in the DC10 old
240can generate: PAL , NTSC , SECAM
241
242Conexant bt866 TV encoder
243is used in AVS6EYES, and
244can generate: NTSC/PAL, PAL­M, PAL­N
245
246The adv717x, should be able to produce PAL N. But you find nothing PAL N
247specific in the registers. Seem that you have to reuse a other standard
248to generate PAL N, maybe it would work if you use the PAL M settings.
249
250==========================
251
2522. How do I get this damn thing to work
253
254Load zr36067.o. If it can't autodetect your card, use the card=X insmod
255option with X being the card number as given in the previous section.
256To have more than one card, use card=X1[,X2[,X3,[X4[..]]]]
257
258To automate this, add the following to your /etc/modprobe.conf:
259
260options zr36067 card=X1[,X2[,X3[,X4[..]]]]
261alias char-major-81-0 zr36067
262
263One thing to keep in mind is that this doesn't load zr36067.o itself yet. It
264just automates loading. If you start using xawtv, the device won't load on
265some systems, since you're trying to load modules as a user, which is not
266allowed ("permission denied"). A quick workaround is to add 'Load "v4l"' to
267XF86Config-4 when you use X by default, or to run 'v4l-conf -c <device>' in
268one of your startup scripts (normally rc.local) if you don't use X. Both
269make sure that the modules are loaded on startup, under the root account.
270
271===========================
272
2733. What mainboard should I use (or why doesn't my card work)
274
275<insert lousy disclaimer here>. In short: good=SiS/Intel, bad=VIA.
276
277Experience tells us that people with a Buz, on average, have more problems
278than users with a DC10+/LML33. Also, it tells us that people owning a VIA-
279based mainboard (ktXXX, MVP3) have more problems than users with a mainboard
280based on a different chipset. Here's some notes from Andrew Stevens:
281--
282Here's my experience of using LML33 and Buz on various motherboards:
283
284VIA MVP3
285    Forget it. Pointless. Doesn't work.
286Intel 430FX (Pentium 200)
287    LML33 perfect, Buz tolerable (3 or 4 frames dropped per movie)
288Intel 440BX (early stepping)
289    LML33 tolerable. Buz starting to get annoying (6-10 frames/hour)
290Intel 440BX (late stepping)
291    Buz tolerable, LML3 almost perfect (occasional single frame drops)
292SiS735
293    LML33 perfect, Buz tolerable.
294VIA KT133(*)
295    LML33 starting to get annoying, Buz poor enough that I have up.
296
297Both 440BX boards were dual CPU versions.
298--
299Bernhard Praschinger later added:
300--
301AMD 751
302    Buz perfect-tolerable
303AMD 760
304    Buz perfect-tolerable
305--
306In general, people on the user mailinglist won't give you much of a chance
307if you have a VIA-based motherboard. They may be cheap, but sometimes, you'd
308rather want to spend some more money on better boards. In general, VIA
309mainboard's IDE/PCI performance will also suck badly compared to others.
310You'll noticed the DC10+/DC30+ aren't mentioned anywhere in the overview.
311Basically, you can assume that if the Buz works, the LML33 will work too. If
312the LML33 works, the DC10+/DC30+ will work too. They're most tolerant to
313different mainboard chipsets from all of the supported cards.
314
315If you experience timeouts during capture, buy a better mainboard or lower
316the quality/buffersize during capture (see 'Concerning buffer sizes, quality,
317output size etc.'). If it hangs, there's little we can do as of now. Check
318your IRQs and make sure the card has its own interrupts.
319
320===========================
321
3224. Programming interface
323
324This driver conforms to video4linux2. Support for V4L1 and for the custom
325zoran ioctls has been removed in kernel 2.6.38.
326
327For programming example, please, look at lavrec.c and lavplay.c code in
328the MJPEG-tools (http://mjpeg.sf.net/).
329
330Additional notes for software developers:
331
332   The driver returns maxwidth and maxheight parameters according to
333   the current TV standard (norm). Therefore, the software which
334   communicates with the driver and "asks" for these parameters should
335   first set the correct norm. Well, it seems logically correct: TV
336   standard is "more constant" for current country than geometry
337   settings of a variety of TV capture cards which may work in ITU or
338   square pixel format.
339
340===========================
341
3425. Applications
343
344Applications known to work with this driver:
345
346TV viewing:
347* xawtv
348* kwintv
349* probably any TV application that supports video4linux or video4linux2.
350
351MJPEG capture/playback:
352* mjpegtools/lavtools (or Linux Video Studio)
353* gstreamer
354* mplayer
355
356General raw capture:
357* xawtv
358* gstreamer
359* probably any application that supports video4linux or video4linux2
360
361Video editing:
362* Cinelerra
363* MainActor
364* mjpegtools (or Linux Video Studio)
365
366===========================
367
3686. Concerning buffer sizes, quality, output size etc.
369
370The zr36060 can do 1:2 JPEG compression. This is really the theoretical
371maximum that the chipset can reach. The driver can, however, limit compression
372to a maximum (size) of 1:4. The reason for this is that some cards (e.g. Buz)
373can't handle 1:2 compression without stopping capture after only a few minutes.
374With 1:4, it'll mostly work. If you have a Buz, use 'low_bitrate=1' to go into
3751:4 max. compression mode.
376
377100% JPEG quality is thus 1:2 compression in practice. So for a full PAL frame
378(size 720x576). The JPEG fields are stored in YUY2 format, so the size of the
379fields are 720x288x16/2 bits/field (2 fields/frame) = 207360 bytes/field x 2 =
380414720 bytes/frame (add some more bytes for headers and DHT (huffman)/DQT
381(quantization) tables, and you'll get to something like 512kB per frame for
3821:2 compression. For 1:4 compression, you'd have frames of half this size.
383
384Some additional explanation by Martin Samuelsson, which also explains the
385importance of buffer sizes:
386--
387> Hmm, I do not think it is really that way. With the current (downloaded
388> at 18:00 Monday) driver I get that output sizes for 10 sec:
389> -q 50 -b 128 : 24.283.332 Bytes
390> -q 50 -b 256 : 48.442.368
391> -q 25 -b 128 : 24.655.992
392> -q 25 -b 256 : 25.859.820
393
394I woke up, and can't go to sleep again. I'll kill some time explaining why
395this doesn't look strange to me.
396
397Let's do some math using a width of 704 pixels. I'm not sure whether the Buz
398actually use that number or not, but that's not too important right now.
399
400704x288 pixels, one field, is 202752 pixels. Divided by 64 pixels per block;
4013168 blocks per field. Each pixel consist of two bytes; 128 bytes per block;
4021024 bits per block. 100% in the new driver mean 1:2 compression; the maximum
403output becomes 512 bits per block. Actually 510, but 512 is simpler to use
404for calculations.
405
406Let's say that we specify d1q50. We thus want 256 bits per block; times 3168
407becomes 811008 bits; 101376 bytes per field. We're talking raw bits and bytes
408here, so we don't need to do any fancy corrections for bits-per-pixel or such
409things. 101376 bytes per field.
410
411d1 video contains two fields per frame. Those sum up to 202752 bytes per
412frame, and one of those frames goes into each buffer.
413
414But wait a second! -b128 gives 128kB buffers! It's not possible to cram
415202752 bytes of JPEG data into 128kB!
416
417This is what the driver notice and automatically compensate for in your
418examples. Let's do some math using this information:
419
420128kB is 131072 bytes. In this buffer, we want to store two fields, which
421leaves 65536 bytes for each field. Using 3168 blocks per field, we get
42220.68686868... available bytes per block; 165 bits. We can't allow the
423request for 256 bits per block when there's only 165 bits available! The -q50
424option is silently overridden, and the -b128 option takes precedence, leaving
425us with the equivalence of -q32.
426
427This gives us a data rate of 165 bits per block, which, times 3168, sums up
428to 65340 bytes per field, out of the allowed 65536. The current driver has
429another level of rate limiting; it won't accept -q values that fill more than
4306/8 of the specified buffers. (I'm not sure why. "Playing it safe" seem to be
431a safe bet. Personally, I think I would have lowered requested-bits-per-block
432by one, or something like that.) We can't use 165 bits per block, but have to
433lower it again, to 6/8 of the available buffer space: We end up with 124 bits
434per block, the equivalence of -q24. With 128kB buffers, you can't use greater
435than -q24 at -d1. (And PAL, and 704 pixels width...)
436
437The third example is limited to -q24 through the same process. The second
438example, using very similar calculations, is limited to -q48. The only
439example that actually grab at the specified -q value is the last one, which
440is clearly visible, looking at the file size.
441--
442
443Conclusion: the quality of the resulting movie depends on buffer size, quality,
444whether or not you use 'low_bitrate=1' as insmod option for the zr36060.c
445module to do 1:4 instead of 1:2 compression, etc.
446
447If you experience timeouts, lowering the quality/buffersize or using
448'low_bitrate=1 as insmod option for zr36060.o might actually help, as is
449proven by the Buz.
450
451===========================
452
4537. It hangs/crashes/fails/whatevers! Help!
454
455Make sure that the card has its own interrupts (see /proc/interrupts), check
456the output of dmesg at high verbosity (load zr36067.o with debug=2,
457load all other modules with debug=1). Check that your mainboard is favorable
458(see question 2) and if not, test the card in another computer. Also see the
459notes given in question 3 and try lowering quality/buffersize/capturesize
460if recording fails after a period of time.
461
462If all this doesn't help, give a clear description of the problem including
463detailed hardware information (memory+brand, mainboard+chipset+brand, which
464MJPEG card, processor, other PCI cards that might be of interest), give the
465system PnP information (/proc/interrupts, /proc/dma, /proc/devices), and give
466the kernel version, driver version, glibc version, gcc version and any other
467information that might possibly be of interest. Also provide the dmesg output
468at high verbosity. See 'Contacting' on how to contact the developers.
469
470===========================
471
4728. Maintainers/Contacting
473
474The driver is currently maintained by Laurent Pinchart and Ronald Bultje
475(<laurent.pinchart@skynet.be> and <rbultje@ronald.bitfreak.net>). For bug
476reports or questions, please contact the mailinglist instead of the developers
477individually. For user questions (i.e. bug reports or how-to questions), send
478an email to <mjpeg-users@lists.sf.net>, for developers (i.e. if you want to
479help programming), send an email to <mjpeg-developer@lists.sf.net>. See
480http://www.sf.net/projects/mjpeg/ for subscription information.
481
482For bug reports, be sure to include all the information as described in
483the section 'It hangs/crashes/fails/whatevers! Help!'. Please make sure
484you're using the latest version (http://mjpeg.sf.net/driver-zoran/).
485
486Previous maintainers/developers of this driver include Serguei Miridonov
487<mirsev@cicese.mx>, Wolfgang Scherr <scherr@net4you.net>, Dave Perks
488<dperks@ibm.net> and Rainer Johanni <Rainer@Johanni.de>.
489
490===========================
491
4929. License
493
494This driver is distributed under the terms of the General Public License.
495
496    This program is free software; you can redistribute it and/or modify
497    it under the terms of the GNU General Public License as published by
498    the Free Software Foundation; either version 2 of the License, or
499    (at your option) any later version.
500
501    This program is distributed in the hope that it will be useful,
502    but WITHOUT ANY WARRANTY; without even the implied warranty of
503    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
504    GNU General Public License for more details.
505
506    You should have received a copy of the GNU General Public License
507    along with this program; if not, write to the Free Software
508    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
509
510See http://www.gnu.org/ for more information.
511

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