Hello.
I have a strange problem here, i.e. disturbed picture when playing
VHS recordings in VCR which is connected to my PVR-150.
Here you see the annoying green and pink interference in the face/head of the
man:
http://id1402.de/00000143.jpg
And a 20 seconds sample, 3,2 MB XVID:
http://id1402.de/sample.avi
I want to write some facts and describe all the tests I've done.
Interference in VHS recording occurs always, no matter whether
"mplayer /dev/video0" or "cat /dev/video0" is used.
It looks like chrominance-luminance-disturbance.
I have Mythbuntu 8.10.
ivtv module is loaded without any options.
#uname -a
Linux id1402 2.6.27-11-generic #1 SMP Thu Jan 29 19:24:39 UTC 2009 i686
GNU/Linux
#modinfo ivtv
filename:
/lib/modules/2.6.27-11-generic/kernel/drivers/media/video/ivtv/ivtv.ko
version: 1.4.0
#lspci -v
00:10.0 Multimedia video controller: Internext Compression Inc iTVC16 (CX23416)
MPEG-2 Encoder (rev 01)
Subsystem: Hauppauge computer works Inc. Device 8003
Flags: bus master, medium devsel, latency 64, IRQ 7
Memory at e4000000 (32-bit, prefetchable) [size=64M]
Capabilities: <access denied>
Kernel driver in use: ivtv
Kernel modules: ivtv
#dmesg
May 10 23:22:53 id1402 kernel: [ 1118.146788] ivtv: Start initialization,
version 1.4.0
May 10 23:22:53 id1402 kernel: [ 1118.150895] ivtv0: Initializing card #0
May 10 23:22:53 id1402 kernel: [ 1118.150930] ivtv0: Autodetected Hauppauge
card (cx23416 based)
May 10 23:22:53 id1402 kernel: [ 1118.155347] ivtv 0000:00:10.0: PCI INT A ->
Link[LNKC] -> GSI 7 (level, low) -> IRQ 7
May 10 23:22:53 id1402 kernel: [ 1118.211311] tveeprom 1-0050: Hauppauge model
26134, rev F1B3, serial# 10200125
May 10 23:22:53 id1402 kernel: [ 1118.211329] tveeprom 1-0050: tuner model is
TCL M2523_3DB_E (idx 113, type 55)
May 10 23:22:53 id1402 kernel: [ 1118.211342] tveeprom 1-0050: TV standards
PAL(B/G) PAL(D/D1/K) (eeprom 0x44)
May 10 23:22:53 id1402 kernel: [ 1118.211353] tveeprom 1-0050: audio processor
is CX25842 (idx 36)
May 10 23:22:53 id1402 kernel: [ 1118.211363] tveeprom 1-0050: decoder
processor is CX25842 (idx 29)
May 10 23:22:53 id1402 kernel: [ 1118.211373] tveeprom 1-0050: has no radio,
has IR receiver, has IR transmitter
May 10 23:22:53 id1402 kernel: [ 1118.211384] ivtv0: Autodetected Hauppauge
WinTV PVR-150
May 10 23:22:53 id1402 kernel: [ 1118.211392] ivtv0: Reopen i2c bus for
IR-blaster support
May 10 23:22:53 id1402 kernel: [ 1118.376216] cx25840 1-0044: cx25842-24 found
@ 0x88 (ivtv i2c driver #0)
May 10 23:22:53 id1402 kernel: [ 1118.396802] tuner 1-0061: chip found @ 0xc2
(ivtv i2c driver #0)
May 10 23:22:53 id1402 kernel: [ 1118.397693] wm8775 1-001b: chip found @ 0x36
(ivtv i2c driver #0)
May 10 23:22:54 id1402 kernel: [ 1118.433154] tuner-simple 1-0061: creating new
instance
May 10 23:22:54 id1402 kernel: [ 1118.433182] tuner-simple 1-0061: type set to
55 (TCL 2002MB)
May 10 23:22:54 id1402 kernel: [ 1118.438507] ivtv0: Registered device video0
for encoder MPG (4096 kB)
May 10 23:22:54 id1402 kernel: [ 1118.450716] ivtv0: Registered device video32
for encoder YUV (2048 kB)
May 10 23:22:54 id1402 kernel: [ 1118.460467] ivtv0: Registered device vbi0 for
encoder VBI (1024 kB)
May 10 23:22:54 id1402 kernel: [ 1119.088078] firmware: requesting
v4l-cx2341x-enc.fw
May 10 23:22:54 id1402 kernel: [ 1119.218101] ivtv0: Loaded v4l-cx2341x-enc.fw
firmware (376836 bytes)
May 10 23:22:55 id1402 kernel: [ 1119.416181] ivtv0: Encoder revision:
0x02060039
May 10 23:22:55 id1402 kernel: [ 1119.430491] firmware: requesting
v4l-cx25840.fw
May 10 23:22:57 id1402 kernel: [ 1122.041278] cx25840 1-0044: loaded
v4l-cx25840.fw firmware (16382 bytes)
May 10 23:22:57 id1402 kernel: [ 1122.203923] ivtv0: Registered device video24
for encoder PCM (320 kB)
May 10 23:22:57 id1402 kernel: [ 1122.203943] ivtv0: Initialized card #0:
Hauppauge WinTV PVR-150
May 10 23:22:57 id1402 kernel: [ 1122.208580] ivtv: End initialization
And now some information concerning tested hardware.
I have 2 pieces of PVR-150 hardware here, one with IR-Blaster and another
without any.
Console outputs above were made with the PVR-150 with IR-Blaster build in. But
the important
fact is, that the bad interference occurs with my both PVR-150. They both
behave equally in
all tests.
Another important fact:
I've tested 2 different VCRs to play VHS recordings. They both behave
equally in all tests, same bad interference.
Another important fact:
I've tested a big amount of VHS recordings. They all behave
equally in all tests, same bad interference. But I have to say that the
interference depends
on the colour. Some colours aren't affected at all, light human skin is
affected strongly by
this interference, as you can see in http://id1402.de/sample.avi
Another important fact:
I've tested different cables between VCR and PVR-150.
1. normal television coaxial cable
2. scart-->cinch Adapter, which you can see here: http://id1402.de/ak392.jpg
They both behave equally in all tests, same bad interference.
Another important fact:
Interference doesn't appear when playing VHS recording on a normal television
set, i. e. VCR
connected to normal television using television coaxial cable. No interference!
Picture of
VHS recording has no disturbance when using a normal television set.
And last, but very important fact:
I connected my antenna cable with VCR and VCR with PVR-150. So PVR-150 had
television signal
which went through VCR.
Than I watched TV using PVR-150 and switched channels using ivtv-tune. No
interference!
Great picture quality watching TV!
This bad interference only occurs with PVR-150 and VHS recordings combined.
Do you understand?
Does VHS recording deliver a little bit different signal compared to TV signal?
Should I try this scart-->s-video Adapter between VCR and PVR-150:
http://id1402.de/98.jpg
_______________________________________________
ivtv-users mailing list
[email protected]
http://ivtvdriver.org/mailman/listinfo/ivtv-users
