On Tue, Mar 8, 2011 at 8:44 PM, Dirk Beer <rdbeer@gmail.com> wrote:
> I'm having problems with image quality with ivtvfb kernel module.
I did some more troubleshooting, and it looks like the problem is with
ivtv and the S-Video output.
dd if=/dev/video0 of=test.mpg
looks good.
dd if=/dev/video0 of=/dev/video16 bs=64k
looks bad on S-Video 1: grainy and desaturated color.
but good on Composite 1.
I'm using:
* kernel 2.6.26-ARCH i686 (old because the Arch-based LinHES R6 uses
only that kernel)
* PVR-350
* recommended firmware from ivtvdriver.org
* S-video 1 output or Composite 1 output
This identical hardware (including cables, tv, etc) gave me a nice
picture recently, so I don't think it is hardware related.
I can use Composite for now, but would like to use S-Video since it
normally has slightly better video quality. Does anyone have any
suggestions of how to fix S-Video?
Dirk
-----------------------------------------
[root@obmyth ~]# dmesg|grep ivtv
ivtv: Start initialization, version 1.4.0
ivtv0: Initializing card #0
ivtv0: Autodetected Hauppauge card (cx23415 based)
ivtv 0000:01:06.0: PCI INT A -> Link[APC3] -> GSI 18 (level, high) -> IRQ 18
ivtv0: Unreasonably low latency timer, setting to 64 (was 32)
ivtv0: Autodetected Hauppauge WinTV PVR-350
saa7115 2-0021: saa7115 found (1f7115d0e100000) @ 0x42 (ivtv i2c driver #0)
saa7127 2-0044: saa7129 found @ 0x88 (ivtv i2c driver #0)
msp3400 2-0040: MSP4448G-A2 found @ 0x80 (ivtv i2c driver #0)
tuner 2-0043: chip found @ 0x86 (ivtv i2c driver #0)
tuner 2-0061: chip found @ 0xc2 (ivtv i2c driver #0)
ivtv0: Registered device video0 for encoder MPG (4096 kB)
ivtv0: Registered device video32 for encoder YUV (2048 kB)
ivtv0: Registered device vbi0 for encoder VBI (1024 kB)
ivtv0: Registered device video24 for encoder PCM (320 kB)
ivtv0: Registered device radio0 for encoder radio
ivtv0: Registered device video16 for decoder MPG (1024 kB)
ivtv0: Registered device vbi8 for decoder VBI (64 kB)
ivtv0: Registered device vbi16 for decoder VOUT
ivtv0: Registered device video48 for decoder YUV (1024 kB)
ivtv0: Initialized card #0: Hauppauge WinTV PVR-350
ivtv: End initialization
ivtv 0000:01:06.0: firmware: requesting v4l-cx2341x-enc.fw
ivtv0: Loaded v4l-cx2341x-enc.fw firmware (376836 bytes)
ivtv 0000:01:06.0: firmware: requesting v4l-cx2341x-dec.fw
ivtv0: Loaded v4l-cx2341x-dec.fw firmware (262144 bytes)
ivtv0: Encoder revision: 0x02060039
ivtv0: Decoder revision: 0x02020023
ivtv 0000:01:06.0: firmware: requesting v4l-cx2341x-init.mpg
ivtv0: Loaded v4l-cx2341x-init.mpg firmware (155648 bytes)
_______________________________________________
ivtv-users mailing list
ivtv-users@ivtvdriver.org
http://ivtvdriver.org/mailman/listinfo/ivtv-users
> I'm having problems with image quality with ivtvfb kernel module.
I did some more troubleshooting, and it looks like the problem is with
ivtv and the S-Video output.
dd if=/dev/video0 of=test.mpg
looks good.
dd if=/dev/video0 of=/dev/video16 bs=64k
looks bad on S-Video 1: grainy and desaturated color.
but good on Composite 1.
I'm using:
* kernel 2.6.26-ARCH i686 (old because the Arch-based LinHES R6 uses
only that kernel)
* PVR-350
* recommended firmware from ivtvdriver.org
* S-video 1 output or Composite 1 output
This identical hardware (including cables, tv, etc) gave me a nice
picture recently, so I don't think it is hardware related.
I can use Composite for now, but would like to use S-Video since it
normally has slightly better video quality. Does anyone have any
suggestions of how to fix S-Video?
Dirk
-----------------------------------------
[root@obmyth ~]# dmesg|grep ivtv
ivtv: Start initialization, version 1.4.0
ivtv0: Initializing card #0
ivtv0: Autodetected Hauppauge card (cx23415 based)
ivtv 0000:01:06.0: PCI INT A -> Link[APC3] -> GSI 18 (level, high) -> IRQ 18
ivtv0: Unreasonably low latency timer, setting to 64 (was 32)
ivtv0: Autodetected Hauppauge WinTV PVR-350
saa7115 2-0021: saa7115 found (1f7115d0e100000) @ 0x42 (ivtv i2c driver #0)
saa7127 2-0044: saa7129 found @ 0x88 (ivtv i2c driver #0)
msp3400 2-0040: MSP4448G-A2 found @ 0x80 (ivtv i2c driver #0)
tuner 2-0043: chip found @ 0x86 (ivtv i2c driver #0)
tuner 2-0061: chip found @ 0xc2 (ivtv i2c driver #0)
ivtv0: Registered device video0 for encoder MPG (4096 kB)
ivtv0: Registered device video32 for encoder YUV (2048 kB)
ivtv0: Registered device vbi0 for encoder VBI (1024 kB)
ivtv0: Registered device video24 for encoder PCM (320 kB)
ivtv0: Registered device radio0 for encoder radio
ivtv0: Registered device video16 for decoder MPG (1024 kB)
ivtv0: Registered device vbi8 for decoder VBI (64 kB)
ivtv0: Registered device vbi16 for decoder VOUT
ivtv0: Registered device video48 for decoder YUV (1024 kB)
ivtv0: Initialized card #0: Hauppauge WinTV PVR-350
ivtv: End initialization
ivtv 0000:01:06.0: firmware: requesting v4l-cx2341x-enc.fw
ivtv0: Loaded v4l-cx2341x-enc.fw firmware (376836 bytes)
ivtv 0000:01:06.0: firmware: requesting v4l-cx2341x-dec.fw
ivtv0: Loaded v4l-cx2341x-dec.fw firmware (262144 bytes)
ivtv0: Encoder revision: 0x02060039
ivtv0: Decoder revision: 0x02020023
ivtv 0000:01:06.0: firmware: requesting v4l-cx2341x-init.mpg
ivtv0: Loaded v4l-cx2341x-init.mpg firmware (155648 bytes)
_______________________________________________
ivtv-users mailing list
ivtv-users@ivtvdriver.org
http://ivtvdriver.org/mailman/listinfo/ivtv-users