Re: [mythtv-users] PVR-350 only records TV at MPEG-1 ??
Thanks, Matt, I haven't had a chance yet to study Myth's database structure. This will help. Kirk Matt SF wrote: ...and then select using the names for the appearance settings from the table "channel" : ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] PVR-350 only records TV at MPEG-1 ??
On Sun, Oct 16, 2005 at 11:03:14PM -0400, Claude Gélinas agr. wrote: > Le dimanche 16 octobre 2005 à 13:29 -0700, Matt SF a écrit : > what are the setting you did in ivtvctl ? Claude-- I hope my previous post was helpful. you can get the range of commands available with "ivtcvtl -h" an example might be: [EMAIL PROTECTED]:/tmp$ ivtvctl -y contrast=78 ioctl VIDIOC_S_CTRL ok then confirm the setting with: [EMAIL PROTECTED]:/tmp$ ivtvctl -Y ioctl: VIDIOC_QUERYCTRL Brightness = 137 Contrast = 78 Saturation = 94 Hue = 0 Volume = 58950 Mute = 0 bonne chance! a bientot! -- - ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] PVR-350 only records TV at MPEG-1 ??
On Sun, Oct 16, 2005 at 03:24:54PM -0700, Kirk Bocek wrote: > Matt, where are the appearance settings located in Myth's MySQL database? > Kirk > when it comes to color, brightness, etc they all seem to live under the channel table. if you go into the db instance...(assuming the defaults...) [EMAIL PROTECTED]:/tmp$ mysql -u mythtv -pmythtv mythconverg ...and then select using the names for the appearance settings from the table "channel" : mysql> select brightness,contrast,colour from channel where chanid=1053; ++--++ | brightness | contrast | colour | ++--++ | 35328 |40960 | 48578 | ++--++ 1 row in set (0.01 sec) ...you can see your current settings (the defaults are 32768, in a range of 0-65535 (hopefully these numbers look familiar to you :) )) I barely know SQL-fu so I just set them one line at a time... mysql> update channel set brightness=35328; mysql> update channel set contrast=40960; mysql> update channel set colour=48578; of course, your mileage may vary. and you should see something similar to this after each entry: Query OK, 0 rows affected (0.02 sec) Rows matched: 82 Changed: 0 Warnings: 0 then log out.. mysql> quit Bye note that if you have the mythweb page open to the channel settings, I believe that just reloading the page could rewrite your settings. so I think it best to stop mythbackend for just a bit, prior to this operation. note also, that the setting values for the PVR-350 are as follows (from ivtvctl -h): brightness=<#> Picture brightness, or more precisely, the black level. [0 - 255] saturation=<#> Picture color saturation or chroma gain. [0 - 127] contrast =<#> Picture contrast or luma gain. [0 - 127] and you can get the current settings with ivtvctl -Y (or test_ioctl for the older versions i think) [EMAIL PROTECTED]:/tmp$ ivtvctl -Y ioctl: VIDIOC_QUERYCTRL Brightness = 137 Contrast = 79 Saturation = 94 Hue = 0 Volume = 58950 Mute = 0 ..and so need to be adjusted into the mythtv 16 bit values (0-65535). I remember reading that one of the developers planned to put a "make these settings the same for all channels" button, but I'm not sure where they are on that. Should make it a bit easier than the whoe conversion and MySQL dance. hope this helps! -matt -- - ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] PVR-350 only records TV at MPEG-1 ??
Le dimanche 16 octobre 2005 à 13:29 -0700, Matt SF a écrit : > Thanks, Niklas, Steve and Nick for responding. Nice to actually get some > feedback on the mythtv-users list :) > > > On Sat, Oct 15, 2005 at 08:13:18PM +0100, Nick wrote: > > On 15/10/05, Matt SF <[EMAIL PROTECTED]> wrote: > > > > No you are not. When trying to improve video capture quality, you > > first have to make sure you have turned off likely culprits like noise > > removal and have as clean a feed as possible. I would also suggest > > employing a test card to see exactly how much resolution the card can > > handle (you should expect S-Video to be better than composite for > > example). The 350 can _natively_ record in MPEG2 over a range of > > resolutions, from 480x480 up to 720x480. > > > > Nick > > > ah ok fair enough :) I just wish these companies would print a spec sheet > that's a bit more clear on the details. lines like these... > > MPEG record specifications: > * NTSC format at 29.97fps: Full D1: 720x480, MPEG1: 352x240 > * PAL format at 25fps: Full D1: 720x576, MPEG1: 352x288 > > MPEG hardware player specifications: > > * NTSC output: Full D1: 720x480, MPEG1: 352x240 > * PAL output: Full D1: 720x576, MPEG1: 352x288 > > ...are misleading with all the previous usage of the term "MPEG2" in the > same document. A quick primer in their specs on "D1" would have been > helpful. e.g.: this entry from DigitalFaq.com... > > D-Values. Various resolutions are often referred to as D-values. Full D1 > video is 720x480. Cropped D1 is 704x480. Half D1 video is 352x480. Quarter > D1 (actually SIF) video is 352x240. Two-Thirds D1 video is 480x480. DVB > and DVD-VR use unusual MPEG resolutions, sometimes called Three-Fourths D1 > at 544x480. > > re: quality issues, I found that tweaking the brightness, color, and > contrast via ivtvctl did help improve the look of the 350's tv-out quite a > bit. A quick run through some MySQL commands and I had my channel > appearance preferences installed across the entire range. I did my best > to match them up visually to my Avia-tuned Sony, just eyeballing it and > switching back endlessly between TV and Video1 :) > what are the setting you did in ivtvctl ? -- - Claude Gélinas agr., dta Phyto Ressources inc. == Varennes, Québec, Canada Tél.: (450) 652 9764, Fax.:(450) 652 6182 Des questions sur les insectes et maladies des plantes ornementales ? Want to know more about ornamental plant pest ? http://www.phyto.qc.ca ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] PVR-350 only records TV at MPEG-1 ??
Matt, where are the appearance settings located in Myth's MySQL database? Kirk Matt SF wrote: A quick run through some MySQL commands and I had my channel appearance preferences installed across the entire range. ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] PVR-350 only records TV at MPEG-1 ??
Thanks, Niklas, Steve and Nick for responding. Nice to actually get some feedback on the mythtv-users list :) On Sat, Oct 15, 2005 at 08:13:18PM +0100, Nick wrote: > On 15/10/05, Matt SF <[EMAIL PROTECTED]> wrote: > > No you are not. When trying to improve video capture quality, you > first have to make sure you have turned off likely culprits like noise > removal and have as clean a feed as possible. I would also suggest > employing a test card to see exactly how much resolution the card can > handle (you should expect S-Video to be better than composite for > example). The 350 can _natively_ record in MPEG2 over a range of > resolutions, from 480x480 up to 720x480. > > Nick ah ok fair enough :) I just wish these companies would print a spec sheet that's a bit more clear on the details. lines like these... MPEG record specifications: * NTSC format at 29.97fps: Full D1: 720x480, MPEG1: 352x240 * PAL format at 25fps: Full D1: 720x576, MPEG1: 352x288 MPEG hardware player specifications: * NTSC output: Full D1: 720x480, MPEG1: 352x240 * PAL output: Full D1: 720x576, MPEG1: 352x288 ...are misleading with all the previous usage of the term "MPEG2" in the same document. A quick primer in their specs on "D1" would have been helpful. e.g.: this entry from DigitalFaq.com... D-Values. Various resolutions are often referred to as D-values. Full D1 video is 720x480. Cropped D1 is 704x480. Half D1 video is 352x480. Quarter D1 (actually SIF) video is 352x240. Two-Thirds D1 video is 480x480. DVB and DVD-VR use unusual MPEG resolutions, sometimes called Three-Fourths D1 at 544x480. re: quality issues, I found that tweaking the brightness, color, and contrast via ivtvctl did help improve the look of the 350's tv-out quite a bit. A quick run through some MySQL commands and I had my channel appearance preferences installed across the entire range. I did my best to match them up visually to my Avia-tuned Sony, just eyeballing it and switching back endlessly between TV and Video1 :) Thanks again! -Matt -- - ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] PVR-350 only records TV at MPEG-1 ??
On Saturday 15 October 2005 14:13, Niklas Brunlid wrote: > On Sat, 15 Oct 2005 19:42:59 +0200, Matt SF <[EMAIL PROTECTED]> wrote: > > wow I guess it pays to not only RTFM but RTFM very carefully :) > > I spotted this old post in looking for ways to improve the image quality > > of my PVR-350... > > > > http://www.gossamer-threads.com/lists/mythtv/users/112094 > > > > note.. "NTSC format at 29.97fps: Full D1: 720x480, MPEG1: 352x240" > > > > Sort of begs the question, just what is the MPEG-2 on the board used for? > > I guess just for putting your home video etc. into the S-video input. > > > > Am I to understand the PVR-350 takes the image from the TV tuner, > > captures it at MPEG-1 and then converts it to MPEG-2 then outputs it? > > It probably means that it will only record in MPEG-1 up to 352x240 (which > IIRC is the max res for MPEG-1, but I could bw wrong), but MPEG-2 up to > 720x480. > > / Niklas also, i believe mpeg-1 is better suited for low resolution encoding than mpeg-2, which is why it defaults to mpeg-1 for those lower resolutions. Steve ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] PVR-350 only records TV at MPEG-1 ??
On 15/10/05, Matt SF <[EMAIL PROTECTED]> wrote: > wow I guess it pays to not only RTFM but RTFM very carefully :) > I spotted this old post in looking for ways to improve the image quality > of my PVR-350... > > http://www.gossamer-threads.com/lists/mythtv/users/112094 > > note.. "NTSC format at 29.97fps: Full D1: 720x480, MPEG1: 352x240" > > Sort of begs the question, just what is the MPEG-2 on the board used for? > I guess just for putting your home video etc. into the S-video input. Recording directly into MPEG2 when using suitable resolutions. > Am I to understand the PVR-350 takes the image from the TV tuner, > captures it at MPEG-1 and then converts it to MPEG-2 then outputs it? No you are not. When trying to improve video capture quality, you first have to make sure you have turned off likely culprits like noise removal and have as clean a feed as possible. I would also suggest employing a test card to see exactly how much resolution the card can handle (you should expect S-Video to be better than composite for example). The 350 can _natively_ record in MPEG2 over a range of resolutions, from 480x480 up to 720x480. Nick ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] PVR-350 only records TV at MPEG-1 ??
On Sat, 15 Oct 2005 19:42:59 +0200, Matt SF <[EMAIL PROTECTED]> wrote: wow I guess it pays to not only RTFM but RTFM very carefully :) I spotted this old post in looking for ways to improve the image quality of my PVR-350... http://www.gossamer-threads.com/lists/mythtv/users/112094 note.. "NTSC format at 29.97fps: Full D1: 720x480, MPEG1: 352x240" Sort of begs the question, just what is the MPEG-2 on the board used for? I guess just for putting your home video etc. into the S-video input. Am I to understand the PVR-350 takes the image from the TV tuner, captures it at MPEG-1 and then converts it to MPEG-2 then outputs it? It probably means that it will only record in MPEG-1 up to 352x240 (which IIRC is the max res for MPEG-1, but I could bw wrong), but MPEG-2 up to 720x480. / Niklas ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
