Hi Asko, folks, currently I don't have time for GNU/Linux and must care for family members. Please try to get help by other list members. Am Dienstag, den 20.10.2009, 17:41 +0300 schrieb Asko Tamm: > Hi Hermann, > > I found you have dealt with saa7134 driver noise and LNA issues > (http://patchwork.kernel.org/patch/24348/). I hope you can direct me a > bit further on the issue i'm having with Kworld studio terminator > (pci).. > > I am capturing old VHS from composite input. The strange thing is, > that after first capture (mencoder interrupted with ctrl-c), the input > becomes noisy. After unloading and reloading the saa7134* modules, i > have one chance to capture cleanly again. > > Also, sometimes (1 of about every 10 captures) i get a clean capture > without reloading the module. > > Could it be some LNA initialization issue on the noisy picture? How > to debug this? > > some screenshots: > http://84.50.124.61/snap_noise.png > http://84.50.124.61/snap_nonoise.png > > captures are from same tape. > > It seems to happen only in high resolution (eg 720x576), did notice > this in 352x576. > I am capturing with mencoder like this: > "mencoder -tv \ > driver=v4l2:width=720:height=576:input=1:norm=pal:fps=25:amode=1:alsa=yes:immediatemode=0:adevice=hw.1,0:audiorate=32000 > \ > tv:// -ovc raw -oac pcm \ > -o $1_raw.mpg" > > i load the module with these parameters: > options saa7134 card=65 tuner=54 > > > Thanks! > -- > asko That must be something else. LNAs are only involved in tuner RF input amplification for what I know so far. User noticeable symptoms of missing LNA support, as reported so far, are a horizontally moving black bar after switching channels, missing vsync, or humming noise on analog audio and a sometimes flashing picture. I admit that your both pictures look exactly like the tda8275 is driven with one more passive splitter too much into more worse reception conditions, but don't have a rhyme on it, why it should work for first usage only. Cheers, Hermann -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
