Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-26 Thread Manu Abraham
John Goacher wrote:
 Manu Abraham wrote:
 
 John Goacher wrote:
 When i looked at the pctv452 driver it was based on a older stb0899 
 driver
 snapshot.
 It still is based on the same ? There were many issues fixed in newer
 changesets, so
 i don't know whether the issue that you see is really a stb0899 driver
 issue which has
 been fixed already or maybe that the pctv device requires some specific
 settings ? I
 don't know.. I don't have much info on this device.

 Regards,
 Manu

 Hi Manu,

 I was using an older snapshot, but I've now rebuilt and re-installed the
 driver following the instructions in the wiki entry at
 http://www.linuxtv.org/wiki/index.php/Pinnacle_PCTV_Sat_HDTV_Pro_USB_%28452e%29

 I'm using what I believe to be the latest snapshot of STB0899 which is
 revision 5882 at http://linuxtv.org/hg/~manu/stb0899/rev/5b19ac1cddb5

That's an older snapshot. The latest changes you can see: 
http://jusst.de/hg/multiproto/log
So many changes went in after 5822, head is 5917 though only till 5916 is 
applicable to you.

Also it looks like the register initialization in the PCTV452e driver seems to 
be different from
budget_av and budget_ci, i don't know the exact reason for those changes, maybe 
has to
do with something with that hardware, but then i can't make out anything 
clearly from it.
 
 I've uploaded high resolution photos of the top and underside of the pcb at 
 the following URLs:
 
 http://www.goacher.dsl.pipex.com/pctv/pctv452e_rev01_top.jpg
 
 and
 
 http://www.goacher.dsl.pipex.com/pctv/pctv452e_rev01_base.jpg
 
 The device is revision 01. By the way, is there any method for getting more 
 error information from the device ? Do you know whether packets in error are 
 discarded by the device without being passed to the device driver ? If so, 
 is there a programmable option to pass error packets through to the device 
 driver and application ?

if you load the module with verbose=5, you get a load of information from the 
STB0899
driver.

Please try applying the patches from the jusst.de tree on to your tree and see 
whether it 
helps in some way. (hard to make out what it is, as it is) Many 
changes/bug-fixes occured 
after revision 5882

Regards,
Manu

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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-21 Thread John Goacher
CityK wrote:
 John Goacher wrote:

 I have no problem with the images being added to the wiki, but I would
 prefer if you or some other kind individual would undertake this as
 I've no experience of updating the wiki.


 Thanks, I'll add them in a few minutes or so.

 Okay, done ... had to shrink them some first before uploading, but they
 still are of good quality:

 http://www.linuxtv.org/wiki/index.php/Pinnacle_PCTV_Sat_HDTV_Pro_USB_%28452e%29#Overview.2FFeatures

 Note, as I've added to the wiki article, it would seem to be the case
 that this is a TechnoTrend rebrand (though, not a great surprise really).


Thanks,
John 


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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-20 Thread John Goacher
Manu Abraham wrote:

 John Goacher wrote:
 When i looked at the pctv452 driver it was based on a older stb0899 
 driver
 snapshot.
 It still is based on the same ? There were many issues fixed in newer
 changesets, so
 i don't know whether the issue that you see is really a stb0899 driver
 issue which has
 been fixed already or maybe that the pctv device requires some specific
 settings ? I
 don't know.. I don't have much info on this device.

 Regards,
 Manu


 Hi Manu,

 I was using an older snapshot, but I've now rebuilt and re-installed the
 driver following the instructions in the wiki entry at
 http://www.linuxtv.org/wiki/index.php/Pinnacle_PCTV_Sat_HDTV_Pro_USB_%28452e%29

 I'm using what I believe to be the latest snapshot of STB0899 which is
 revision 5882 at http://linuxtv.org/hg/~manu/stb0899/rev/5b19ac1cddb5

 Unfortunately, I still get the packet loss problem with this snapshot.


 There can be 2 possibilities
 * some pctv452 specific setting required, due to the hardware difference
 * some unknown bug that gets explicitly noticed in a specific combination

 In either case, can you please put up some high resolution pictures of 
 your
 device up some place (since i don't have much of an understanding about
 your hardware configuration, hoping that the pictures might yield some 
 clues) ?

 Regards,
 Manu


I've uploaded high resolution photos of the top and underside of the pcb at 
the following URLs:

http://www.goacher.dsl.pipex.com/pctv/pctv452e_rev01_top.jpg

and

http://www.goacher.dsl.pipex.com/pctv/pctv452e_rev01_base.jpg

The device is revision 01. By the way, is there any method for getting more 
error information from the device ? Do you know whether packets in error are 
discarded by the device without being passed to the device driver ? If so, 
is there a programmable option to pass error packets through to the device 
driver and application ?

regards,
John 


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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-20 Thread CityK
John Goacher wrote:
 I have no problem with the images being added to the wiki, but I would
 prefer if you or some other kind individual would undertake this as
 I've no experience of updating the wiki.

Thanks, I'll add them in a few minutes or so.

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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-20 Thread CityK
CityK wrote:
 John Goacher wrote:
   
 I have no problem with the images being added to the wiki, but I would
 prefer if you or some other kind individual would undertake this as
 I've no experience of updating the wiki.
 

 Thanks, I'll add them in a few minutes or so.

Okay, done ... had to shrink them some first before uploading, but they
still are of good quality:

http://www.linuxtv.org/wiki/index.php/Pinnacle_PCTV_Sat_HDTV_Pro_USB_%28452e%29#Overview.2FFeatures

Note, as I've added to the wiki article, it would seem to be the case
that this is a TechnoTrend rebrand (though, not a great surprise really).

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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-19 Thread John Goacher
Manu Abraham wrote:

 John Goacher wrote:
 Tony Grant wrote:

 Le vendredi 14 décembre 2007 à 13:49 +, John Goacher a écrit :

 Your success with Das Erste prompted me to
 temporarily re-align my dish (Sky minidish) to point to 19.2E to see if
 I could duplicate your results. The good news is that I get a
 perfect recording from Das Erste. I recorded about 15 minutes of data,
 then
 ran it through TSReader Lite to check for errors. There were absolutely
 no
 errors of any kind indicated ! I double checked this by viewing the
 recording in DVBViewer Pro under XP.

 This is interesting because the signal strength from Das Erste (as
 displayed
 by DVBViewer Pro under Windows XP) is much lower than I'm getting from
 Astra
 28.2E (I'm based in the London area). Das Erste displays a signal
 strength
 reading
 of 41%, whereas the BBC channels at 28.2E (on which I'me seeing high
 error
 rates)
 show signal strengths of around 65%. I think this probably rules out
 signal
 quality as
 the issue, and suggests the problem is somehow related to the channel
 parameters.
 I have issues with 28.2E compared to 19.2E and always have had. 19.2
 just works whereas 28.2 is much more finicky. Last week a big storm
 cloud over the Pyreneans blocked all signal for about 10 minutes - BBC2
 just stopped and it is one of the better signals. During thunder storms
 on 19.2 you have some artifacts but I have never lost the carrier.


 Hi Tony,

 I take your point, but the fact that I can receive the 28.2E channels
 perfectly with the PCTV under Windows XP, but not under linux (with the 
 same
 hardware and feed), strongly suggests the problem is not signal quality.
 Similarly, the fact that I can receive Das Erste perfectly under linux,
 despite the signal from 19.2E being much weaker at my location, also
 suggests this.


 When i looked at the pctv452 driver it was based on a older stb0899 driver 
 snapshot.
 It still is based on the same ? There were many issues fixed in newer 
 changesets, so
 i don't know whether the issue that you see is really a stb0899 driver 
 issue which has
 been fixed already or maybe that the pctv device requires some specific 
 settings ? I
 don't know.. I don't have much info on this device.

 Regards,
 Manu


Hi Manu,

I was using an older snapshot, but I've now rebuilt and re-installed the 
driver following the instructions in the wiki entry at 
http://www.linuxtv.org/wiki/index.php/Pinnacle_PCTV_Sat_HDTV_Pro_USB_%28452e%29

I'm using what I believe to be the latest snapshot of STB0899 which is 
revision 5882 at http://linuxtv.org/hg/~manu/stb0899/rev/5b19ac1cddb5

Unfortunately, I still get the packet loss problem with this snapshot.

regards,
John 


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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-19 Thread Manu Abraham
John Goacher wrote:
 Manu Abraham wrote:
 
 John Goacher wrote:
 Tony Grant wrote:

 Le vendredi 14 décembre 2007 à 13:49 +, John Goacher a écrit :

 Your success with Das Erste prompted me to
 temporarily re-align my dish (Sky minidish) to point to 19.2E to see if
 I could duplicate your results. The good news is that I get a
 perfect recording from Das Erste. I recorded about 15 minutes of data,
 then
 ran it through TSReader Lite to check for errors. There were absolutely
 no
 errors of any kind indicated ! I double checked this by viewing the
 recording in DVBViewer Pro under XP.

 This is interesting because the signal strength from Das Erste (as
 displayed
 by DVBViewer Pro under Windows XP) is much lower than I'm getting from
 Astra
 28.2E (I'm based in the London area). Das Erste displays a signal
 strength
 reading
 of 41%, whereas the BBC channels at 28.2E (on which I'me seeing high
 error
 rates)
 show signal strengths of around 65%. I think this probably rules out
 signal
 quality as
 the issue, and suggests the problem is somehow related to the channel
 parameters.
 I have issues with 28.2E compared to 19.2E and always have had. 19.2
 just works whereas 28.2 is much more finicky. Last week a big storm
 cloud over the Pyreneans blocked all signal for about 10 minutes - BBC2
 just stopped and it is one of the better signals. During thunder storms
 on 19.2 you have some artifacts but I have never lost the carrier.

 Hi Tony,

 I take your point, but the fact that I can receive the 28.2E channels
 perfectly with the PCTV under Windows XP, but not under linux (with the 
 same
 hardware and feed), strongly suggests the problem is not signal quality.
 Similarly, the fact that I can receive Das Erste perfectly under linux,
 despite the signal from 19.2E being much weaker at my location, also
 suggests this.

 When i looked at the pctv452 driver it was based on a older stb0899 driver 
 snapshot.
 It still is based on the same ? There were many issues fixed in newer 
 changesets, so
 i don't know whether the issue that you see is really a stb0899 driver 
 issue which has
 been fixed already or maybe that the pctv device requires some specific 
 settings ? I
 don't know.. I don't have much info on this device.

 Regards,
 Manu

 
 Hi Manu,
 
 I was using an older snapshot, but I've now rebuilt and re-installed the 
 driver following the instructions in the wiki entry at 
 http://www.linuxtv.org/wiki/index.php/Pinnacle_PCTV_Sat_HDTV_Pro_USB_%28452e%29
 
 I'm using what I believe to be the latest snapshot of STB0899 which is 
 revision 5882 at http://linuxtv.org/hg/~manu/stb0899/rev/5b19ac1cddb5
 
 Unfortunately, I still get the packet loss problem with this snapshot.


There can be 2 possibilities
* some pctv452 specific setting required, due to the hardware difference
* some unknown bug that gets explicitly noticed in a specific combination

In either case, can you please put up some high resolution pictures of your 
device up some place (since i don't have much of an understanding about 
your hardware configuration, hoping that the pictures might yield some clues) ?

Regards,
Manu


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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-18 Thread Manu Abraham
John Goacher wrote:
 Tony Grant wrote:
 
 Le vendredi 14 décembre 2007 à 13:49 +, John Goacher a écrit :

 Your success with Das Erste prompted me to
 temporarily re-align my dish (Sky minidish) to point to 19.2E to see if
 I could duplicate your results. The good news is that I get a
 perfect recording from Das Erste. I recorded about 15 minutes of data, 
 then
 ran it through TSReader Lite to check for errors. There were absolutely 
 no
 errors of any kind indicated ! I double checked this by viewing the
 recording in DVBViewer Pro under XP.

 This is interesting because the signal strength from Das Erste (as 
 displayed
 by DVBViewer Pro under Windows XP) is much lower than I'm getting from 
 Astra
 28.2E (I'm based in the London area). Das Erste displays a signal 
 strength
 reading
 of 41%, whereas the BBC channels at 28.2E (on which I'me seeing high 
 error
 rates)
 show signal strengths of around 65%. I think this probably rules out 
 signal
 quality as
 the issue, and suggests the problem is somehow related to the channel
 parameters.
 I have issues with 28.2E compared to 19.2E and always have had. 19.2
 just works whereas 28.2 is much more finicky. Last week a big storm
 cloud over the Pyreneans blocked all signal for about 10 minutes - BBC2
 just stopped and it is one of the better signals. During thunder storms
 on 19.2 you have some artifacts but I have never lost the carrier.

 
 Hi Tony,
 
 I take your point, but the fact that I can receive the 28.2E channels 
 perfectly with the PCTV under Windows XP, but not under linux (with the same 
 hardware and feed), strongly suggests the problem is not signal quality. 
 Similarly, the fact that I can receive Das Erste perfectly under linux, 
 despite the signal from 19.2E being much weaker at my location, also 
 suggests this.
 

When i looked at the pctv452 driver it was based on a older stb0899 driver 
snapshot.
It still is based on the same ? There were many issues fixed in newer 
changesets, so
i don't know whether the issue that you see is really a stb0899 driver issue 
which has 
been fixed already or maybe that the pctv device requires some specific 
settings ? I 
don't know.. I don't have much info on this device.

Regards,
Manu
 

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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-16 Thread John Goacher
Daniel Golle wrote:

i also noticed glitches on some channels, but not all.
 Using szap2 (or the patched version of VDR 1.5) on Astra 19.2E
 Das
 Erste:11836:hC34M2S0Z0:S19.2E:27500:101:102=deu,103=2ch;106=dd:104:0:28106:1:1101:0
 works perfect and didn't show a single error in several hours of
 recording, while
 ORF2E:12692:hC56M2S0Z0:S19.2E:22000:170:171=deu:505:0:13014:1:1117:0
 rarely gives any complete picture at all - usually vdr-softdevice
 crashes after some seconds...
 this pointed me to a possible dependency on the symbol rate, but i
 didn't investigate it further. as I'm currently waiting for a new LNC to
 be delivered, i cannot run any meaningful test at this moment (but
 hopefully next week).

 regards

 Daniel


I've now carried out some additional tests to try and pin down which 
parameters affect the results. I tried the following 6 channels on Astra 
19.2E:

Das Erste:11837:h:0:27500:101:102:28106
ZDF:11954:h:0:27500:110:120:28006
3sat:11954:h:0:27500:210:220:28007
Rhein main TV:12633:h:0:22000:208:308:12614
DW-TV:11596:v:0:22000:1000:1001:10020
QVC Germany:12552:v:0:22000:165:166:12100

The first three channels have symbol rate 27500, the second three have 
symbol rate 22000.

I captured one minute of data from each channel and then ran the files 
through TSReader to check for errors. The data from the channels with symbol 
rate 27500 is perfect. However, the data from all the channels with symbol 
rate 22000 show errors, typically in the range 300 to 500 continuity errors 
in a one minute period, which works out at around 1 in 300 packets lost on 
average.

This seemed to indicate the problem is linked to symbol rate, as you 
suggested. However, I then repeated the test on Astra 28.2E, which has a 
stronger signal at my location. I tested a couple of channels which have a 
symbol rate of 27500, for example Sky News. Both of these showed continuity 
errors. Therefore the problem cannot just be linked to symbol rate.

I then performed a full scan of Astra 19.2E and 28.2E using DVBViewer under 
Windows. This scan indicated that all the above channels on 19.2E which have 
symbol rate 27500 and show zero data loss have a FEC parameter value of 3/4, 
whereas the channels on 19.2E which have symbol rate 22000 and show data 
loss have FEC 5/6. On Astra  28.2E, the channels with symbol rate 27500 
(e.g. Sky News), which show data loss have FEC 2/3.

This leads me to wonder whether the dependency is in fact FEC related, as 
only FEC 3/4 gives an error free stream in the above tests. If I could find 
an error-free channel with symbol rate 22000 and FEC 3/4 this would 
eliminate symbol rate as an issue. However, there do not appear to be any 
channels on 19.2E or 28.2E configured in that way.

Of course, there are other devices out there which also use the STB0899 
module. Could anyone who is familiar with this module shed any light on the 
issue ? I should emphasise that all the above channels are error-free under 
Windows on the same hardware with the same feed, so the problem doesn't 
appear to be related to signal quality.

John Goacher 


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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-14 Thread Tony Grant
Le vendredi 14 décembre 2007 à 13:49 +, John Goacher a écrit :

 Your success with Das Erste prompted me to
 temporarily re-align my dish (Sky minidish) to point to 19.2E to see if
 I could duplicate your results. The good news is that I get a
 perfect recording from Das Erste. I recorded about 15 minutes of data, then
 ran it through TSReader Lite to check for errors. There were absolutely no
 errors of any kind indicated ! I double checked this by viewing the
 recording in DVBViewer Pro under XP.
 
 This is interesting because the signal strength from Das Erste (as displayed
 by DVBViewer Pro under Windows XP) is much lower than I'm getting from Astra
 28.2E (I'm based in the London area). Das Erste displays a signal strength 
 reading
 of 41%, whereas the BBC channels at 28.2E (on which I'me seeing high error 
 rates)
 show signal strengths of around 65%. I think this probably rules out signal 
 quality as
 the issue, and suggests the problem is somehow related to the channel 
 parameters.

I have issues with 28.2E compared to 19.2E and always have had. 19.2
just works whereas 28.2 is much more finicky. Last week a big storm
cloud over the Pyreneans blocked all signal for about 10 minutes - BBC2
just stopped and it is one of the better signals. During thunder storms
on 19.2 you have some artifacts but I have never lost the carrier.

 Note that during the BBC HD trial from Crystal Palace I was able to
 record this channel from a DVB-T adapter without packet loss even on
 the EPIA5000 (533 MHz Via Eden processor).

That is nice. EPIA M1 with BBC HD on DVB-S I get sound but no image.

Cheers

Tony

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[linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-13 Thread John Goacher
Although this device is not yet officially supported, I've been trying to get 
it working following success reported by others in an earlier thread. I've 
followed the instructions in the DVB wiki entry for this device, and have 
succeeded in tuning the device using the patched version of szap, and recording 
a transport stream (using cat /dev/dvb/adapter0/dvr0  recording.ts).

However, the transport stream shows up discontinuity errors which manifest as 
glitches in the playback. From the stats produced by TS Reader the rate of loss 
is typically around 1 packet in 700, though it varies from run to run. 

I realise the simplest explanation for this would be a poor quality signal. 
However, the device performs flawlessly under Windows XP in exactly the same 
hardware configuration (same computer, dish, and sat feed) when tuned to the 
same channels. This seems to rule out signal quality as a cause unless the 
linux driver does not configure the device's error correction properly. Is 
there any possibility this could be the case ?

I've also tried running the linux configuration on two different computers - an 
AMD X2 4600 with Asus M2NPV-VM mobo, and a Via EPIA5000 system (with a PCI 
5-port USB2.0 card). The same problem occurs on both systems.

I'm using kernel version 2.6.18-2. I also have two DVB-T USB adapters which 
work with the same software configuration with no packet loss.

The channels I've tried are BBC 1 London and BBC HD. Obviously, the data rate 
is much higher on the HD channel. I've cross-checked with the XP configuration 
to make sure that the frequencies, polarity, etc. are correct in the 
channels.conf file.

Note that during the BBC HD trial from Crystal Palace I was able to record this 
channel from a DVB-T adapter without packet loss even on the EPIA5000 (533 MHz 
Via Eden processor).

I'm unable to determine at what point in the processing chain the packets are 
being lost. I temporarily inserted some checks for continuity errors on a 
specific pid in the 'dvb_dmxdev_ts_callback' function in dmxdev.c. This showed 
packets had already gone missing at this point in the driver. I don't know my 
way around the code well enough to be able to pursue it further. In particular, 
I can't tell whether the packets are being discarded somewhere in the driver, 
or within the device itself. The only kind of errors which I detect are 
continuity errors. Does the device filter out all packets in error or does it 
pass them through to the driver with the appropriate error flags set in the 
packet header ?

Has anybody succeeded in getting an error free transport stream from this 
device ? If not, are there any ideas about where the problem might be ?

Thanks,
John
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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e) packet loss

2007-12-13 Thread Daniel Golle
i also noticed glitches on some channels, but not all.
Using szap2 (or the patched version of VDR 1.5) on Astra 19.2E
Das
Erste:11836:hC34M2S0Z0:S19.2E:27500:101:102=deu,103=2ch;106=dd:104:0:28106:1:1101:0
works perfect and didn't show a single error in several hours of
recording, while
ORF2E:12692:hC56M2S0Z0:S19.2E:22000:170:171=deu:505:0:13014:1:1117:0
rarely gives any complete picture at all - usually vdr-softdevice
crashes after some seconds...
this pointed me to a possible dependency on the symbol rate, but i
didn't investigate it further. as I'm currently waiting for a new LNC to
be delivered, i cannot run any meaningful test at this moment (but
hopefully next week).

regards

Daniel

On Thu, 2007-12-13 at 13:20 +0100, [EMAIL PROTECTED] wrote:
 Although this device is not yet officially supported, I've been trying
 to get it working following success reported by others in an earlier
 thread. I've followed the instructions in the DVB wiki entry for this
 device, and have succeeded in tuning the device using the patched
 version of szap, and recording a transport stream (using
 cat /dev/dvb/adapter0/dvr0  recording.ts).
 
 However, the transport stream shows up discontinuity errors which
 manifest as glitches in the playback. From the stats produced by TS
 Reader the rate of loss is typically around 1 packet in 700, though it
 varies from run to run. 
 
 I realise the simplest explanation for this would be a poor quality
 signal. However, the device performs flawlessly under Windows XP in
 exactly the same hardware configuration (same computer, dish, and sat
 feed) when tuned to the same channels. This seems to rule out signal
 quality as a cause unless the linux driver does not configure the
 device's error correction properly. Is there any possibility this
 could be the case ?
 
 I've also tried running the linux configuration on two different
 computers - an AMD X2 4600 with Asus M2NPV-VM mobo, and a Via EPIA5000
 system (with a PCI 5-port USB2.0 card). The same problem occurs on
 both systems.
 
 I'm using kernel version 2.6.18-2. I also have two DVB-T USB adapters
 which work with the same software configuration with no packet loss.
 
 The channels I've tried are BBC 1 London and BBC HD. Obviously, the
 data rate is much higher on the HD channel. I've cross-checked with
 the XP configuration to make sure that the frequencies, polarity, etc.
 are correct in the channels.conf file.
 
 Note that during the BBC HD trial from Crystal Palace I was able to
 record this channel from a DVB-T adapter without packet loss even on
 the EPIA5000 (533 MHz Via Eden processor).
 
 I'm unable to determine at what point in the processing chain the
 packets are being lost. I temporarily inserted some checks for
 continuity errors on a specific pid in the 'dvb_dmxdev_ts_callback'
 function in dmxdev.c. This showed packets had already gone missing at
 this point in the driver. I don't know my way around the code well
 enough to be able to pursue it further. In particular, I can't tell
 whether the packets are being discarded somewhere in the driver, or
 within the device itself. The only kind of errors which I detect are
 continuity errors. Does the device filter out all packets in error or
 does it pass them through to the driver with the appropriate error
 flags set in the packet header ?
 
 Has anybody succeeded in getting an error free transport stream from
 this device ? If not, are there any ideas about where the problem
 might be ?
 
 Thanks,
 John


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Re: [linux-dvb] Pinnacle PCTV Sat HDTV Pro USB (452e)

2007-09-27 Thread CityK
Jens Krehbiel-Gräther wrote:
 I've read ...
 that the driver for the Pinnacle PCTV Sat HDTV Pro USB is
 pre-Work-In-Progress. What does that mean? 

I have no idea what that wonderfully vague description means.

 Is there already a driver
 for this device which I can test? I can support you on testing the
 driver, but where can I find this?
   

I rather doubt that there is a driver(s) per se for the 452e.  Manu has
indeed produced some experimental drivers for some PCI cards that use
the same frontend portion as the 452e, and while these same drivers have
been, from my casual observations, extended for use with a few other
similar PCI cards, I have not seen mention of their extension to USB. 
In order to do so, in the case of the 452, one will have to figure out
how the FX2 is behaving, and then tie these two sets of elements
together (i.e. glue code between the components, which offers device
level support).  

 I just found the device twice on

 http://www.linuxtv.org/wiki/index.php/DVB-S_USB_Devices .
 First in the unsupported DVB-S USB device ans second in supportet
 DVB-S2 devices.
 So I understand that there is DVB-S2 support for this device but no
 DVB-S support. Is that right? 

I think it is just reflective of a double entry in the wiki, and a
misplacement.



 But in actual hg tree I found nothing
 about this device??
   
Have a read through the hits on the first page of this search and you
will probably be brought up to speed:
http://marc.info/?l=linux-dvbw=2r=1s=stb0899q=b

It appears that TT also has a USB S2 deviceIt stands to chance that
your Pinnacle and this TT device may very well be similar...(it would
not be a surprise at all if they even turn out to be the exact same device).

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