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12-12-2012, 12:35 PM
#1
LQ Newbie
Registered: Aug 2006
Distribution: Arch
Posts: 16
Rep:
Incomplete/scrambled data from a BT878 Device
Hello
EDIT: The card can be fixed as follows:
Code:
rmmod bttv
modprobe bttv card=77 #makes composite work
rmmod bttv
modprobe bttv #now svideo and composite work
I will have to experiment further to see why this should be. cat /dev/video0 drops frames though; mplayer doesn't.
I have an AverMedia AverDVD EZMaker analog video capture card (composite and svideo, not modulated TV) based on a BT878 device. Unfortunately, when I try to capture from this device, I get a scrambled picture. I believe this is because there is only about a quarter of the data being produced by /dev/video0 as should be.
The device is detected after switching it from one PCI slot to another (Motherboard: Asus P8 Z77-V Pro, from slot PCI2 to slot PCI1). Interestingly, processing UDev events now takes much longer than it did before I installed the card slot PCI1.
EDIT: Mysteriously, it is now detected in the second PCI slot.
If I run
Code:
mplayer -tv driver=v4l2:input=2:norm=pal:width=720:height=576 tv://
then I see a jumbled picture. It vaguely resembles what the camera is seeing, but not well. When I examine the amount of information being produced by /dev/video0, it is around 4 MiB/s, rather than the 622080*25 bytes (About 14.8 MiB/s) it should be. The camera produces PAL video. I've searched for this problem, but have not found anyone who got scrambeld/incomplete data rather than none or working. I have had this card working in another machine (on Windows XP), so I do not believe this is a fault with the card.
I've included output from uname, lspci, dmesg, and v4l2-ctl.
Code:
$ cat /dev/video0 | pv > /dev/null
52.8MiB 0:00:13 [3.91MiB/s]
Code:
$ uname -srvmo
Linux 3.6.9-1-ARCH #1 SMP PREEMPT Tue Dec 4 08:04:10 CET 2012 x86_64 GNU/Linux
Code:
v4l2-ctl -i 2
Video input set to 2 (S-Video: no hsync lock.)
Code:
$ v4l2-ctl --all
Driver Info (not using libv4l2):
Driver name : bttv
Card type : BT878 video ( *** UNKNOWN/GENER
Bus info : PCI:0000:06:00.0
Driver version: 3.6.9
Capabilities : 0x05000015
Video Capture
Video Overlay
VBI Capture
Read/Write
Streaming
Priority: 2
Frequency for tuner 0: 0 (0.000000 MHz)
Video input : 2 (S-Video: no hsync lock.)
Audio input : 0 (audio)
Video Standard = 0x000000ff
PAL-B/B1/G/H/I/D/D1/K
Format Video Capture:
Width/Height : 720/576
Pixel Format : 'YV12'
Field : Interlaced
Bytes per Line: 720
Size Image : 622080
Colorspace : Unknown (00000000)
Format Video Overlay:
Left/Top : 0/0
Width/Height: 320/240
Field : Any
Chroma Key : 0x00000000
Global Alpha: 0x00
Clip Count : 0
Clip Bitmap : No
Framebuffer Format:
Capability : Clipping List
Flags :
Width : 0
Height : 0
Pixel Format : ''
Bytes per Line: 0
Size image : 0
Colorspace : Unknown (00000000)
Format VBI Capture:
Sampling Rate : 35468950 Hz
Offset : 244 samples (6.87926e-06 secs after leading edge)
Samples per Line: 2048
Sample Format : GREY
Start 1st Field : 7
Count 1st Field : 16
Start 2nd Field : 320
Count 2nd Field : 16
Crop Capability Invalid:
Bounds : Left 68, Top 16, Width 1063, Height 608
Default : Left 186, Top 46, Width 924, Height 576
Pixel Aspect: 1135/944
Crop: Left 186, Top 46, Width 924, Height 576
Streaming Parameters Video Capture:
Frames per second: 25.000 (25/1)
Read buffers : 0
brightness (int) : min=0 max=65535 step=256 default=32768 value=32768
contrast (int) : min=0 max=65535 step=128 default=27648 value=27648
saturation (int) : min=0 max=65535 step=128 default=32768 value=32768
hue (int) : min=0 max=65535 step=256 default=32768 value=32768
balance (int) : min=0 max=65535 step=655 default=32768 value=0
bass (int) : min=0 max=65535 step=655 default=32768 value=0
treble (int) : min=0 max=65535 step=655 default=32768 value=0
mute (bool) : default=0 value=0
chroma_agc (bool) : default=0 value=0
combfilter (bool) : default=0 value=0
automute (bool) : default=0 value=1
luma_decimation_filter (bool) : default=0 value=0
agc_crush (bool) : default=0 value=1
vcr_hack (bool) : default=0 value=0
whitecrush_upper (int) : min=0 max=255 step=1 default=207 value=207
whitecrush_lower (int) : min=0 max=255 step=1 default=127 value=127
uv_ratio (int) : min=0 max=100 step=1 default=50 value=50
full_luma_range (bool) : default=0 value=0
coring (int) : min=0 max=3 step=1 default=0 value=0
Code:
$ sudo lspci -vnn
00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor DRAM Controller [8086:0150] (rev 09)
Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Flags: bus master, fast devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=0c <?>
00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port [8086:0151] (rev 09) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
I/O behind bridge: 0000e000-0000efff
Memory behind bridge: f7e00000-f7efffff
Prefetchable memory behind bridge: 00000000e0000000-00000000efffffff
Capabilities: [88] Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Capabilities: [80] Power Management version 3
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [a0] Express Root Port (Slot+), MSI 00
Capabilities: [100] Virtual Channel
Capabilities: [140] Root Complex Link
Capabilities: [d94] #19
Kernel driver in use: pcieport
00:14.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller [8086:1e31] (rev 04) (prog-if 30 [XHCI])
Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Flags: bus master, medium devsel, latency 0, IRQ 46
Memory at f7f20000 (64-bit, non-prefetchable) [size=64K]
Capabilities: [70] Power Management version 2
Capabilities: [80] MSI: Enable+ Count=1/8 Maskable- 64bit+
Kernel driver in use: xhci_hcd
00:16.0 Communication controller [0780]: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 [8086:1e3a] (rev 04)
Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Flags: bus master, fast devsel, latency 0, IRQ 65
Memory at f7f3b000 (64-bit, non-prefetchable) [size=16]
Capabilities: [50] Power Management version 3
Capabilities: [8c] MSI: Enable+ Count=1/1 Maskable- 64bit+
Kernel driver in use: mei
00:19.0 Ethernet controller [0200]: Intel Corporation 82579V Gigabit Network Connection [8086:1503] (rev 04)
Subsystem: ASUSTeK Computer Inc. P8P67 Deluxe Motherboard [1043:849c]
Flags: bus master, fast devsel, latency 0, IRQ 66
Memory at f7f00000 (32-bit, non-prefetchable) [size=128K]
Memory at f7f39000 (32-bit, non-prefetchable) [size=4K]
I/O ports at f040 [size=32]
Capabilities: [c8] Power Management version 2
Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [e0] PCI Advanced Features
Kernel driver in use: e1000e
00:1a.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 [8086:1e2d] (rev 04) (prog-if 20 [EHCI])
Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Flags: bus master, medium devsel, latency 0, IRQ 16
Memory at f7f38000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
Kernel driver in use: ehci_hcd
00:1b.0 Audio device [0403]: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller [8086:1e20] (rev 04)
Subsystem: ASUSTeK Computer Inc. Device [1043:84fb]
Flags: bus master, fast devsel, latency 0, IRQ 67
Memory at f7f30000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [50] Power Management version 2
Capabilities: [60] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
Capabilities: [100] Virtual Channel
Capabilities: [130] Root Complex Link
Kernel driver in use: snd_hda_intel
00:1c.0 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 [8086:1e10] (rev c4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=02, subordinate=02, sec-latency=0
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1c.2 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 [8086:1e14] (rev c4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
Memory behind bridge: f7d00000-f7dfffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1c.3 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 4 [8086:1e16] (rev c4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=04, subordinate=04, sec-latency=0
I/O behind bridge: 0000d000-0000dfff
Memory behind bridge: f7c00000-f7cfffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1c.4 PCI bridge [0604]: Intel Corporation 82801 PCI Bridge [8086:244e] (rev c4) (prog-if 01 [Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=05, subordinate=06, sec-latency=0
I/O behind bridge: 0000c000-0000cfff
Memory behind bridge: f7b00000-f7bfffff
Prefetchable memory behind bridge: 00000000f0000000-00000000f00fffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable- Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Capabilities: [a0] Power Management version 2
00:1c.6 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 7 [8086:1e1c] (rev c4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=07, subordinate=07, sec-latency=0
Memory behind bridge: f7a00000-f7afffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1c.7 PCI bridge [0604]: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 8 [8086:1e1e] (rev c4) (prog-if 00 [Normal decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=00, secondary=08, subordinate=08, sec-latency=0
Memory behind bridge: f7900000-f79fffff
Capabilities: [40] Express Root Port (Slot+), MSI 00
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [90] Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Capabilities: [a0] Power Management version 2
Kernel driver in use: pcieport
00:1d.0 USB controller [0c03]: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 [8086:1e26] (rev 04) (prog-if 20 [EHCI])
Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Flags: bus master, medium devsel, latency 0, IRQ 23
Memory at f7f37000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [50] Power Management version 2
Capabilities: [58] Debug port: BAR=1 offset=00a0
Capabilities: [98] PCI Advanced Features
Kernel driver in use: ehci_hcd
00:1f.0 ISA bridge [0601]: Intel Corporation Z77 Express Chipset LPC Controller [8086:1e44] (rev 04)
Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Flags: bus master, medium devsel, latency 0
Capabilities: [e0] Vendor Specific Information: Len=0c <?>
Kernel driver in use: lpc_ich
00:1f.2 SATA controller [0106]: Intel Corporation 7 Series/C210 Series Chipset Family 6-port SATA Controller [AHCI mode] [8086:1e02] (rev 04) (prog-if 01 [AHCI 1.0])
Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 47
I/O ports at f090 [size=8]
I/O ports at f080 [size=4]
I/O ports at f070 [size=8]
I/O ports at f060 [size=4]
I/O ports at f020 [size=32]
Memory at f7f36000 (32-bit, non-prefetchable) [size=2K]
Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [70] Power Management version 3
Capabilities: [a8] SATA HBA v1.0
Capabilities: [b0] PCI Advanced Features
Kernel driver in use: ahci
00:1f.3 SMBus [0c05]: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller [8086:1e22] (rev 04)
Subsystem: ASUSTeK Computer Inc. Device [1043:84ca]
Flags: medium devsel, IRQ 18
Memory at f7f35000 (64-bit, non-prefetchable) [size=256]
I/O ports at f000 [size=32]
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Tahiti XT [Radeon HD 7970] [1002:6798] (prog-if 00 [VGA controller])
Subsystem: Micro-Star International Co., Ltd. Device [1462:2770]
Flags: bus master, fast devsel, latency 0, IRQ 69
Memory at e0000000 (64-bit, prefetchable) [size=256M]
Memory at f7e00000 (64-bit, non-prefetchable) [size=256K]
I/O ports at e000 [size=256]
Expansion ROM at f7e40000 [disabled] [size=128K]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150] Advanced Error Reporting
Capabilities: [270] #19
Capabilities: [2b0] Address Translation Service (ATS)
Capabilities: [2c0] #13
Capabilities: [2d0] #1b
Kernel driver in use: fglrx_pci
01:00.1 Audio device [0403]: Advanced Micro Devices [AMD] nee ATI Tahiti XT HDMI Audio [Radeon HD 7970 Series] [1002:aaa0]
Subsystem: Micro-Star International Co., Ltd. Device [1462:aaa0]
Flags: bus master, fast devsel, latency 0, IRQ 68
Memory at f7e60000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150] Advanced Error Reporting
Kernel driver in use: snd_hda_intel
03:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller [1b21:1042] (prog-if 30 [XHCI])
Subsystem: ASUSTeK Computer Inc. Device [1043:8488]
Flags: bus master, fast devsel, latency 0, IRQ 18
Memory at f7d00000 (64-bit, non-prefetchable) [size=32K]
Capabilities: [50] MSI: Enable- Count=1/8 Maskable- 64bit+
Capabilities: [68] MSI-X: Enable+ Count=8 Masked-
Capabilities: [78] Power Management version 3
Capabilities: [80] Express Legacy Endpoint, MSI 00
Capabilities: [100] Virtual Channel
Kernel driver in use: xhci_hcd
04:00.0 SATA controller [0106]: ASMedia Technology Inc. ASM1062 Serial ATA Controller [1b21:0612] (rev 01) (prog-if 01 [AHCI 1.0])
Subsystem: ASUSTeK Computer Inc. Device [1043:84b7]
Flags: bus master, fast devsel, latency 0, IRQ 48
I/O ports at d050 [size=8]
I/O ports at d040 [size=4]
I/O ports at d030 [size=8]
I/O ports at d020 [size=4]
I/O ports at d000 [size=32]
Memory at f7c00000 (32-bit, non-prefetchable) [size=512]
Capabilities: [50] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [78] Power Management version 3
Capabilities: [80] Express Legacy Endpoint, MSI 00
Capabilities: [100] Virtual Channel
Kernel driver in use: ahci
05:00.0 PCI bridge [0604]: ASMedia Technology Inc. ASM1083/1085 PCIe to PCI Bridge [1b21:1080] (rev 03) (prog-if 01 [Subtractive decode])
Flags: bus master, fast devsel, latency 0
Bus: primary=05, secondary=06, subordinate=06, sec-latency=32
I/O behind bridge: 0000c000-0000cfff
Memory behind bridge: f7b00000-f7bfffff
Prefetchable memory behind bridge: 00000000f0000000-00000000f00fffff
Capabilities: [c0] Subsystem: ASMedia Technology Inc. ASM1083/1085 PCIe to PCI Bridge [1b21:1080]
06:00.0 Multimedia video controller [0400]: Brooktree Corporation Bt878 Video Capture [109e:036e] (rev 11)
Flags: bus master, medium devsel, latency 32, IRQ 16
Memory at f0001000 (32-bit, prefetchable) [size=4K]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
Kernel driver in use: bttv
06:00.1 Multimedia controller [0480]: Brooktree Corporation Bt878 Audio Capture [109e:0878] (rev 11)
Flags: medium devsel, IRQ 11
Memory at f0000000 (32-bit, prefetchable) [disabled] [size=4K]
Capabilities: [44] Vital Product Data
Capabilities: [4c] Power Management version 2
06:01.0 FireWire (IEEE 1394) [0c00]: VIA Technologies, Inc. VT6306/7/8 [Fire II(M)] IEEE 1394 OHCI Controller [1106:3044] (rev 46) (prog-if 10 [OHCI])
Subsystem: AFAVLAB Technology Inc Device [14db:3044]
Flags: bus master, stepping, medium devsel, latency 32, IRQ 17
Memory at f7b00000 (32-bit, non-prefetchable) [size=2K]
I/O ports at c000 [size=128]
Capabilities: [50] Power Management version 2
Kernel driver in use: firewire_ohci
07:00.0 Network controller [0280]: Atheros Communications Inc. AR9485 Wireless Network Adapter [168c:0032] (rev 01)
Subsystem: ASUSTeK Computer Inc. Device [1043:850d]
Flags: bus master, fast devsel, latency 0, IRQ 18
Memory at f7a00000 (64-bit, non-prefetchable) [size=512K]
Expansion ROM at f7a80000 [disabled] [size=64K]
Capabilities: [40] Power Management version 2
Capabilities: [50] MSI: Enable- Count=1/4 Maskable+ 64bit+
Capabilities: [70] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [140] Virtual Channel
Capabilities: [160] Device Serial Number 00-00-00-00-00-00-00-00
Kernel driver in use: ath9k
08:00.0 USB controller [0c03]: ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller [1b21:1042] (prog-if 30 [XHCI])
Subsystem: ASUSTeK Computer Inc. Device [1043:8488]
Flags: bus master, fast devsel, latency 0, IRQ 19
Memory at f7900000 (64-bit, non-prefetchable) [size=32K]
Capabilities: [50] MSI: Enable- Count=1/8 Maskable- 64bit+
Capabilities: [68] MSI-X: Enable+ Count=8 Masked-
Capabilities: [78] Power Management version 3
Capabilities: [80] Express Legacy Endpoint, MSI 00
Capabilities: [100] Virtual Channel
Kernel driver in use: xhci_hcd
Code:
$ dmesg | tail
[ 994.118649] bttv: 0: SCERR @ 3785d000,bits: VSYNC HSYNC OFLOW SCERR*
[ 994.171887] bttv: 0: SCERR @ 3785d014,bits: VSYNC HSYNC OFLOW SCERR*
[ 994.212091] bttv: 0: SCERR @ 3785d014,bits: VSYNC HSYNC OFLOW SCERR*
[ 994.265061] bttv: 0: SCERR @ 3785d014,bits: VSYNC HSYNC OFLOW SCERR*
[ 994.298303] bttv: 0: SCERR @ 3785d014,bits: VSYNC HSYNC OFLOW SCERR*
[ 994.338170] bttv: 0: SCERR @ 3785d000,bits: VSYNC HSYNC OFLOW SCERR*
[ 994.391387] bttv: 0: SCERR @ 3785d014,bits: VSYNC HSYNC OFLOW SCERR*
[ 994.437878] bttv: 0: SCERR @ 3785d014,bits: VSYNC HSYNC OFLOW SCERR*
[ 994.491132] bttv: 0: SCERR @ 3785d014,bits: VSYNC HSYNC OFLOW SCERR*
[ 994.515422] bttv: 0: timeout: drop=0 irq=37334/55555, risc=3785d01c, bits: VSYNC HSYNC OFLOW
Many thanks
Techmeology
Last edited by Techmeology; 12-13-2012 at 03:57 PM .
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