Mailing List Archive: HVR-1600 SD quality on LCD

I am using Mythdora 10.22. I recently upgraded from a 42" SD tv to a 46"
LCD. I use an Explorer 4250 from Cablevision connected to the HVR-1600.
Essentially SD is pretty fuzzy with this setup. DVD playback is clear.

I verified my recording and live tv profiles are set to 720x480. I tried
upping bitrates to 6000 and 7000, but this did not seem to help.

03:00.0 Multimedia video controller: Conexant CX23418 Single-Chip MPEG-2
Encoder with Integrated Analog Video/Broadcast Audio Decoder
Subsystem: Hauppauge computer works Inc. Device 7444
Flags: bus master, medium devsel, latency 64, IRQ 20
Memory at e0000000 (32-bit, non-prefetchable) [size=64M]
Capabilities: [44] Vital Product Data <?>
Capabilities: [4c] Power Management version 2
Kernel driver in use: cx18
Kernel modules: cx18

Output is

01:00.0 VGA compatible controller: nVidia Corporation G70 [GeForce 7600 GT]
(rev a1) (prog-if 00 [VGA controller])
Subsystem: Giga-byte Technology Device 3417
Flags: bus master, fast devsel, latency 0, IRQ 16
Memory at e8000000 (32-bit, non-prefetchable) [size=16M]
Memory at d0000000 (64-bit, prefetchable) [size=256M]
Memory at e9000000 (64-bit, non-prefetchable) [size=16M]
I/O ports at 9000 [size=128]
[virtual] Expansion ROM at ea000000 [disabled] [size=128K]
Capabilities: [60] Power Management version 2
Capabilities: [68] Message Signalled Interrupts: Mask- 64bit+
Count=1/1 Enable-
Capabilities: [78] Express Endpoint, MSI 00
Kernel driver in use: nvidia
Kernel modules: nvidiafb, nvidia

cx18: Start initialization, version 1.0.0
cx18-0: Initializing card #0
cx18-0: Autodetected Hauppauge card
cx18 0000:03:00.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
cx18-0: Unreasonably low latency timer, setting to 64 (was 32)
cx18-0: cx23418 revision 01010000 (B)
cx18-0: Autodetected Hauppauge HVR-1600
cx18-0: VBI is not yet supported
tuner 2-0061: chip found @ 0xc2 (cx18 i2c driver #0-1)
cs5345 1-004c: chip found @ 0x98 (cx18 i2c driver #0-0)
cx18-0: Disabled encoder IDX device
cx18-0: Registered device video0 for encoder MPEG (2 MB)
DVB: registering new adapter (cx18)
cx18-0: DVB Frontend registered
cx18-0: Registered device video32 for encoder YUV (2 MB)
cx18-0: Registered device video24 for encoder PCM audio (1 MB)
cx18-0: Initialized card #0: Hauppauge HVR-1600
cx18: End initialization
cx18-0: loaded v4l-cx23418-apu.fw firmware V00120000 (141200 bytes)
cx18-0: loaded v4l-cx23418-cpu.fw firmware (158332 bytes)
cx18-0: FW version: 0.0.74.0 (Release 2007/03/12)
cx18-0: loaded v4l-cx23418-dig.fw firmware (16382 bytes)

rpm -qa|grep ivtv
ivtv-utils-1.3.0-1.fc10.i386
ivtv-firmware-20080701-18.noarch

Any hints would be appreciated.

On Thu, 2010-03-25 at 19:52 -0400, Scott Bickford wrote:
> I am using Mythdora 10.22. I recently upgraded from a 42" SD tv to a
> 46" LCD. I use an Explorer 4250 from Cablevision connected to the
> HVR-1600. Essentially SD is pretty fuzzy with this setup. DVD
> playback is clear.
>
> I verified my recording and live tv profiles are set to 720x480. I
> tried upping bitrates to 6000 and 7000, but this did not seem to help.

Assuming that this is a problem with recording, this sounds like a video
cable problem. Get a better quality S-Video or Composite video cable.

If this is an LCD display hardware upscale/interpolation problem, then I
can't help.

> cx18: Start initialization, version 1.0.0

If a new cable didn't yield better recordings, there's a slim chance
that the latest version of the driver (1.4.0 IIRC) would help.

http://www.ivtvdriver.org/index.php/Cx18#Obtaining_the_driver

I'll suggest you may want back-up your existing /lib/modules/`uname -r`
first, before the 'make install' step.

Regards,
Andy

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