Re: [mythtv-users] FYI: pvrusb2 5 default minute recording sizes
On Thu, 2005-08-04 at 21:36 -0500, Mike Isely wrote: > If you really want to store in 480x480 then you'd probably have to set up > mythtv to transcode after the fact. I was just using 480x480 as an example. I sort of figured the size was static with this device. I was just looking for confirmation on my guessing. :-) > Transcoding in mythtv happens in a second stage, after the recording is > completed. > > Additional information on the pvrusb2 driver can be found at: > > http://www.isely.net/pvrusb2.html > > -Mike Yup. would be nice if it piped the capture into a resize command sequence. However, mythtv is a beast as it is, without mentioning cpu consumption! -- Roger http://www.eskimo.com/~roger/index.html Key fingerprint = 8977 A252 2623 F567 70CD 1261 640F C963 1005 1D61 Fri Aug 5 00:57:34 PDT 2005 ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] FYI: pvrusb2 5 default minute recording sizes
I think I can shed some light on this, being that I'm the person who has been working on the driver for the pvrusb2 device for the past 6 months... See below. On Thu, 4 Aug 2005, roger wrote: [...] > > It looks as if the default 480x480 profile is being used, but mythtv is > just recording @ 720 x 480 (the output resolution of /dev/v4l/video0). > Which is just fine and dandy by me until I want to save disk space by > reducing the resolution. Video capture and encoding is handled entirely in hardware on this device. By the time mythtv gets the data it's already an mpeg2 stream. Therefore the determination of encoding resolution happens in the device and right now it's probably always going to do 720x480 for NTSC. There are ioctl() controls in the driver which can be used to change the capture resolution. However this is a very immature driver and frankly I'd be surprised if that part even worked - assuming that mythtv would even know about or call those functions. So you're probably stuck at 720x480. If you really want to store in 480x480 then you'd probably have to set up mythtv to transcode after the fact. > > MY MAIN QUESTION HERE: > >From the looks of it, mythtv does not transcode while recording at the > same time -- Or it is not possible with this hardware (external usb > mpeg2 tv card)? I can see however, mythtv will execute a > script/transcode after recording has stopped. Transcoding in mythtv happens in a second stage, after the recording is completed. Additional information on the pvrusb2 driver can be found at: http://www.isely.net/pvrusb2.html -Mike -- | Mike Isely | PGP fingerprint Spammers Die!! | | 03 54 43 4D 75 E5 CC 92 | isely @ pobox (dot) com | 71 16 01 E2 B5 F5 C1 E8 | | ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] FYI: pvrusb2 5 default minute recording sizes
roger wrote: When I press R/r while in live tv viewing mode, mythtv will respond by saying "Recording ..." and fades away. No icons or any info are displayed showing tv is actively being recorded.(Think I'm finding out later, mythtv schedules the entire 30 minute + section for recording or something, but I usually find pressing R/r not doing any recording.) Pressing R/r again, simply shows "Recording ..." again. From mythtv documentation, R or r should toggle start/stop recording. (cycles through types?) Think your interpretation of the documentation is off a bit... From http://mythtv.org/docs/mythtv-HOWTO-11.html#ss11.1 section "LiveTV Browse Mode" R/r - Toggle recording of current program (cycles through types) Says nothing about start/stop. ;) If you look through the code it becomes quite obvious that "start" and "stop" are not the "recording types" to which they're referring--especially with the nice comment explaining how it works. (The hard part is finding the right code if you're not a programmer. ;) Below is the comment documenting the ToggleRecord() function from libs/libmythtv/programinfo.cpp (which is eventually called in response to pressing the TOGGLERECORD button): /** \fn ProgramInfo::ToggleRecord() * \brief Cycles through recording types. * * If the program recording status is kNotRecording, * ApplyRecordStateChange(kSingleRecord) is called. * If the program recording status is kSingleRecording, * ApplyRecordStateChange(kFindOneRecord) is called. * etc... * * The states in order are: kNotRecording, kSingleRecord, kFindOneRecord, * kWeekslotRecord, kFindWeeklyRecord, kTimeslotRecord, kFindDailyRecord, * kChannelRecord, kAllRecord. * And: kOverrideRecord, kDontRecord. * * That is if you the recording is in any of the first set of states, * we cycle through those, if not we toggle between kOverrideRecord and * kDontRecord. */ Mike ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] FYI: pvrusb2 5 default minute recording sizes
Sorry. This is erroranous data. Somehow the recording may not have stopped when I thought I had stopped it. When I press R/r while in live tv viewing mode, mythtv will respond by saying "Recording ..." and fades away. No icons or any info are displayed showing tv is actively being recorded.(Think I'm finding out later, mythtv schedules the entire 30 minute + section for recording or something, but I usually find pressing R/r not doing any recording.) Pressing R/r again, simply shows "Recording ..." again. >From mythtv documentation, R or r should toggle start/stop recording. (cycles through types?) It looks as if the default 480x480 profile is being used, but mythtv is just recording @ 720 x 480 (the output resolution of /dev/v4l/video0). Which is just fine and dandy by me until I want to save disk space by reducing the resolution. MY MAIN QUESTION HERE: >From the looks of it, mythtv does not transcode while recording at the same time -- Or it is not possible with this hardware (external usb mpeg2 tv card)? I can see however, mythtv will execute a script/transcode after recording has stopped. (Think I'll just spend the day with tinkering with mythtv. See how much more stupid mythtv makes me look. :-) -- Roger http://www.eskimo.com/~roger/index.html Key fingerprint = 8977 A252 2623 F567 70CD 1261 640F C963 1005 1D61 Thu Aug 4 12:53:52 PDT 2005 ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
Re: [mythtv-users] FYI: pvrusb2 5 default minute recording sizes
On 8/4/05, roger <[EMAIL PROTECTED]> wrote: > The first is using mythtv with the default recording profile. > The second, test-5min.mpg, is created using cat /dev/v4l/video0. > > These are +/- 30 seconds. > > 468M Aug 4 10:58 3045_20050804104900_2005080413.nuv > 229M Aug 4 11:38 test-5min.mpg > What are the resolution and bitrate settings for the 2nd file? > > > ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
[mythtv-users] FYI: pvrusb2 5 default minute recording sizes
The first is using mythtv with the default recording profile. The second, test-5min.mpg, is created using cat /dev/v4l/video0. These are +/- 30 seconds. 468M Aug 4 10:58 3045_20050804104900_2005080413.nuv 229M Aug 4 11:38 test-5min.mpg (This device streams mpeg2 on /dev/v4l/video0) -- Roger http://www.eskimo.com/~roger/index.html Key fingerprint = 8977 A252 2623 F567 70CD 1261 640F C963 1005 1D61 Thu Aug 4 11:47:00 PDT 2005 ___ mythtv-users mailing list mythtv-users@mythtv.org http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
