Hello.
1) RAM is cheap now days. Can I use RAM to keep buffer data? (System running from USB stick so only reason to start Hard Disk is when i use recordings)
2) Patch only record current channel. It would be nice if i can select channels from lists where buffers are active. Example. i change channel and noticing that program what i want to look is already running so i simply press "jump backward" button and start to look program from beginning. (2GB can keep about 100 minutes in buffers. If i select 5 different channels that i got 20mins buffer in every channel)
Regards: Tommi
On Wed, Nov 18, 2009 at 8:46 AM, Tommi Lundell prelude@kapsi.fi wrote:
Hello.
- RAM is cheap now days. Can I use RAM to keep buffer data?
(System running from USB stick so only reason to start Hard Disk is when i use recordings)
- Patch only record current channel. It would be nice if i can select
channels from lists where buffers are active. Example. i change channel and noticing that program what i want to look is already running so i simply press "jump backward" button and start to look program from beginning. (2GB can keep about 100 minutes in buffers. If i select 5 different channels that i got 20mins buffer in every channel)
There was some talk a while back about implementing a live tv buffer into VDR. Many users don't like the idea of their harddrive recording 24/7 so it was mentioned to be able to buffer to ram just as you're asking about. I personally do NOT want to buffer to harddrive, especially non-stop. However, I'm all for buffering to RAM since it _is_ very cheap these days for 2-4GB. I don't know how much of a priority this is to Klaus but I'd recommend searching the mailing list for that thread because he did participate in the discussion.
VDR User wrote:
On Wed, Nov 18, 2009 at 8:46 AM, Tommi Lundell prelude@kapsi.fi wrote:
Hello.
- RAM is cheap now days. Can I use RAM to keep buffer data?
(System running from USB stick so only reason to start Hard Disk is when i use recordings)
- Patch only record current channel. It would be nice if i can select
channels from lists where buffers are active. Example. i change channel and noticing that program what i want to look is already running so i simply press "jump backward" button and start to look program from beginning. (2GB can keep about 100 minutes in buffers. If i select 5 different channels that i got 20mins buffer in every channel)
There was some talk a while back about implementing a live tv buffer into VDR. Many users don't like the idea of their harddrive recording 24/7 so it was mentioned to be able to buffer to ram just as you're asking about. I personally do NOT want to buffer to harddrive, especially non-stop. However, I'm all for buffering to RAM since it _is_ very cheap these days for 2-4GB. I don't know how much of a priority this is to Klaus but I'd recommend searching the mailing list for that thread because he did participate in the discussion.
I agree, if the buffer was a configurable FIFO file (location and size), then the user could choose if the location was on a hard disk or a RAM disk.
-- Scott
On Wed, 2009-11-18 at 17:41 +0000, Scott wrote:
I agree, if the buffer was a configurable FIFO file (location and size), then the user could choose if the location was on a hard disk or a RAM disk.
I've never used the livebuffer patch - does it add any measurable latency when zapping channels?
The last thing I would want is to gradually morph VDR into a sloth like MythTV :(
gdh
Wouldn't work very well with HD video. Our locals (ATSC) use 8-13Gb/hour
VDR User wrote:
On Wed, Nov 18, 2009 at 8:46 AM, Tommi Lundell prelude@kapsi.fi wrote:
Hello.
- RAM is cheap now days. Can I use RAM to keep buffer data?
(System running from USB stick so only reason to start Hard Disk is when i use recordings)
- Patch only record current channel. It would be nice if i can select
channels from lists where buffers are active. Example. i change channel and noticing that program what i want to look is already running so i simply press "jump backward" button and start to look program from beginning. (2GB can keep about 100 minutes in buffers. If i select 5 different channels that i got 20mins buffer in every channel)
There was some talk a while back about implementing a live tv buffer into VDR. Many users don't like the idea of their harddrive recording 24/7 so it was mentioned to be able to buffer to ram just as you're asking about. I personally do NOT want to buffer to harddrive, especially non-stop. However, I'm all for buffering to RAM since it _is_ very cheap these days for 2-4GB. I don't know how much of a priority this is to Klaus but I'd recommend searching the mailing list for that thread because he did participate in the discussion.
vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
On Wed, Nov 18, 2009 at 11:13 AM, Timothy D. Lenz tlenz@vorgon.com wrote:
Wouldn't work very well with HD video. Our locals (ATSC) use 8-13Gb/hour
VDR User wrote:
On Wed, Nov 18, 2009 at 8:46 AM, Tommi Lundell prelude@kapsi.fi wrote:
Hello.
- RAM is cheap now days. Can I use RAM to keep buffer data?
(System running from USB stick so only reason to start Hard Disk is when i use recordings)
- Patch only record current channel. It would be nice if i can select
channels from lists where buffers are active. Example. i change channel and noticing that program what i want to look is already running so i simply press "jump backward" button and start to look program from beginning. (2GB can keep about 100 minutes in buffers. If i select 5 different channels that i got 20mins buffer in every channel)
There was some talk a while back about implementing a live tv buffer into VDR. Many users don't like the idea of their harddrive recording 24/7 so it was mentioned to be able to buffer to ram just as you're asking about. I personally do NOT want to buffer to harddrive, especially non-stop. However, I'm all for buffering to RAM since it _is_ very cheap these days for 2-4GB. I don't know how much of a priority this is to Klaus but I'd recommend searching the mailing list for that thread because he did participate in the discussion.
On the contrary 2-4GB should be just fine for typical live buffering use. If you want an hour worth of HDTV buffering you're probably better off setting timers to record the shows you want but regardless you can just add more ram to support more buffering time. Btw, I have several hour-long HDTV recordings and none of them go over 3GB.
I just looked and some recordings are smaller now, I have 4 recordings for Castle, all 1 hour and 5-6Gb each 7 Recordings of Eastwick each 1 hour and 5-7Gb 6 recordings of Fringe 1 hour each 6-8Gb Going through a bunch more I find they mostly run 5-8Gb. Those are channels that do 720p where doing 8+ before when I looked. Don't have any form NBC right now which uses 1080i and was running 13Gb
VDR User wrote:
On Wed, Nov 18, 2009 at 11:13 AM, Timothy D. Lenz tlenz@vorgon.com wrote:
Wouldn't work very well with HD video. Our locals (ATSC) use 8-13Gb/hour
VDR User wrote:
On Wed, Nov 18, 2009 at 8:46 AM, Tommi Lundell prelude@kapsi.fi wrote:
Hello.
- RAM is cheap now days. Can I use RAM to keep buffer data?
(System running from USB stick so only reason to start Hard Disk is when i use recordings)
- Patch only record current channel. It would be nice if i can select
channels from lists where buffers are active. Example. i change channel and noticing that program what i want to look is already running so i simply press "jump backward" button and start to look program from beginning. (2GB can keep about 100 minutes in buffers. If i select 5 different channels that i got 20mins buffer in every channel)
There was some talk a while back about implementing a live tv buffer into VDR. Many users don't like the idea of their harddrive recording 24/7 so it was mentioned to be able to buffer to ram just as you're asking about. I personally do NOT want to buffer to harddrive, especially non-stop. However, I'm all for buffering to RAM since it _is_ very cheap these days for 2-4GB. I don't know how much of a priority this is to Klaus but I'd recommend searching the mailing list for that thread because he did participate in the discussion.
On the contrary 2-4GB should be just fine for typical live buffering use. If you want an hour worth of HDTV buffering you're probably better off setting timers to record the shows you want but regardless you can just add more ram to support more buffering time. Btw, I have several hour-long HDTV recordings and none of them go over 3GB.
vdr mailing list vdr@linuxtv.org http://www.linuxtv.org/cgi-bin/mailman/listinfo/vdr
Tommi Lundell wrote:
Hello.
- RAM is cheap now days. Can I use RAM to keep buffer data?
(System running from USB stick so only reason to start Hard Disk is when i use recordings)
- Patch only record current channel. It would be nice if i can select
channels from lists where buffers are active. Example. i change channel and noticing that program what i want to look is already running so i simply press "jump backward" button and start to look program from beginning. (2GB can keep about 100 minutes in buffers. If i select 5 different channels that i got 20mins buffer in every channel)
I reply to myself. (Sometimes it would be nice to test it before ask "not so smart" questions) It's look that point 1) is pretty easy to do. Simply select use RAM from setup->permanent timeshift menu :P or other way is use tmpfs to "emulate" Hard Disk: # mount -t tmpfs none /var/ramdisk -o size=2G and run vdr with switch "--buffer=/var/ramdisk"
But point 2) is more complicated and my skills don't go even close what implementation needs. Is that even possible to implement directly into VDR or with patches?
Regards: Tommi
On Thu, Nov 19, 2009 at 10:26 AM, Tommi Lundell prelude@kapsi.fi wrote:
- Patch only record current channel. It would be nice if i can select
channels from lists where buffers are active. Example. i change channel and noticing that program what i want to look is already running so i simply press "jump backward" button and start to look program from beginning. (2GB can keep about 100 minutes in buffers. If i select 5 different channels that i got 20mins buffer in every channel)
But point 2) is more complicated and my skills don't go even close what implementation needs. Is that even possible to implement directly into VDR or with patches?
To buffer any channel, a dvb device must be locked to the same sat & transponder the channel is on. If you want to always buffer 5 channels, and 4 of them are on different transponders, you would need to have 5 dvb devices installed to watch live tv. 4 devices dedicated to those transponders and 1 available to surf any channels of live tv.
I can't honestly see the benefit of this over just setting timers to record your favorite shows. It seems like a lot of work & hardware for something that there are better solutions for imo. Maybe you watch an unusually large amount of tv without every checking the guide for future shows that might interest you? ;)
-
Gavin Hamill -
Scott -
Timothy D. Lenz -
Tommi Lundell -
VDR User