Thread: RE: dvgrab data on Windows machine
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From: Arne S. <ar...@sc...> - 2000-05-31 15:16:56
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Hi Mark, thanks for testing the dvgrab software, I can't do any NTSC related work here. xdvplay currently does not recognize the dv2 format. I'll fix that later. The weird thing is that your windows box doesn't display AVI files created with dvgrab 0.7. I thought this version is working and stable. I would guess that you do not have DV codecs on your windows system, but then the dv2 format should not play either. Let me recollect the information from your emails, could you please verify this: | xdvplay | Windows media player | RealPlayer ---------------------------------------------------------------------------- dvgrab 0.7 (dvgrab_latest)| works | fails | fails dvgrab 0.8 --format dv1 | works | fails | fails dvgrab 0.8 --format dv2 | core dump | plays at half speed | fails Sigh. Let me get back to the code... Arne |
From: Mark K. <mk...@co...> - 2000-05-31 16:27:25
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Arne, I have a mixture of machines here, so this is all getting confusing. Possibly I should limit my reporting to only one or two machines until we get things under control... My stable of 1394 enabled machines: Work Linux boxes: a) 433 Celeron b) 200MHz Pentium c) 333 Pentium II Home Linux Box: a) 750MHz Athlon b) 500MHz Pentium III (no 1394 card - on network) Work NT Box: a) 300MHz Pentium II with Adaptec Hot Connect 8940 Your table below is essentially correct, but the two entries under xdvplay that say 'works' should also say 'plays at about 1/4 speed'. Watching the clips it looks like xdvplay is not dropping too many frames - it's just going VERY slowly. My 10 second dv1 format dvgrab clips played using xdvplay take about: 45 seconds on the Celeron 433 55 seconds on the Pentium II 333 doesn't play on the Pentium 200 (no MMX?) My 10 second dv2 format clips, when played with WMP take about 14-15 seconds. I tried them at 50%, 100% & 200% screens. All three screen sizes took the same amount of time. It is very clear that WMP is dropping most of the frames in these clips. On Real Player 7.0 Beta, they 'play', take about 14-15 seconds, but the screen is black. (No picture) I tried another simple test to look at WMP. I downloaded an mpeg clip from the Broadcast 2000 site (titanic.mpeg) and played this clip. It reports that it is 38 seconds long, and it takes 38 seconds to play in WMP. Granted, different compressors/codecs, but it worked as expected with respect to time. I wanted to download some AVI clips from the web, but a quick search yields only XXX sites and I don't want to get fired!!! I guess I'll have to deal with that problem on an after hours basis!! ;-) I am unclear what I am to expect from xdvplay. Is xdvplay expected to drop frames automatically to stay in time? (Probably necessary to sync with audio...) Or does it just cycle through the database and display the info? (45 seconds/55 seconds) almost == (333 MHz / 433 MHz) -- Coincidence? I am personally hoping that the problem on the Windows box may be small. I am particularly curious about the differences between the two file formats when I look at the file properties. The dv2 format, which plays, also provides information about the encoding of video and audio. The dv1 format, which does not play, does not provide any information about the encoding, which is consistent with the type of failure in WMP. I am hoping that the data is good, but something simply got messed up in the packaging of the file? I'm happy to provide more info as you need it. Mark -----Original Message----- From: Arne Schirmacher [mailto:ar...@sc...] Sent: Wednesday, May 31, 2000 9:00 AM To: 'lin...@li...' Cc: mk...@co...; 'Mark W. Knecht' Subject: RE: dvgrab data on Windows machine Hi Mark, thanks for testing the dvgrab software, I can't do any NTSC related work here. xdvplay currently does not recognize the dv2 format. I'll fix that later. The weird thing is that your windows box doesn't display AVI files created with dvgrab 0.7. I thought this version is working and stable. I would guess that you do not have DV codecs on your windows system, but then the dv2 format should not play either. Let me recollect the information from your emails, could you please verify this: | xdvplay | Windows media player | RealPlayer ---------------------------------------------------------------------------- dvgrab 0.7 (dvgrab_latest)| works | fails | fails dvgrab 0.8 --format dv1 | works | fails | fails dvgrab 0.8 --format dv2 | core dump | plays at half speed | fails Sigh. Let me get back to the code... Arne |
From: Arne S. <ar...@sc...> - 2000-05-31 18:33:29
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Hi Mark, I have changed the Type-1 code a little. Please try it. Before the fix the Type-1 AVIs would play on my Windows-NT box, but not on a Windows-98 box. I did not try both systems. With this fix I can play all two types on both systems. http://www.schirmacher.de/arne/dvgrab/dvgrab_0.81.tar.gz xdvgrab is in fact too slow, but this is actually a libdv issue. Sooner or later the libdv developers will provide a faster version, but I am quite happy that we have some working code. And yes, it requires a MMX CPU. I could not get RealPlayer working at all with my AVIs. They don't even play with a black screen. There is probably a timing issue left in the Type-2 code. I noticed with my PAL AVIs that the speed is basically correct but the video stops at about 80% with the slider still moving on. But that's probably trivial. Xdvplay is just a very simple front end to the libdv software. Maybe I add Type-2 support but that's it. I already have made a patched version of xanim, this is probably the way to go. One program supporting all kinds of video formats. The patch is still too unstable to release it (actually it displays just one frame before core dumping). Thanks for your time that you are putting in Arne |
From: Mark W. K. <mar...@ho...> - 2000-06-01 04:09:37
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Did some more compiling, clipping & testing... Good news - Win 98 SE works great... Bad news - many don't work yet, at least for me... using dvgrab_0.81 to get data Windows Media Player - NT & 98 Second Edition Real Player - Linux Ver_7, Win Ver_8 Quicktime - NT Ver_4 Results: Format ------------------------------------ dv1 dv2 ------------------------------------ xdvplay plays fails (1/4) ------------------------------------ WMP_NT40 fails plays (1/2) ------------------------------------ WMP_98SE plays plays ------------------------------------ RP_7_Linux fails fails ------------------------------------ RP_8_98SE fails fails ------------------------------------ RP_7_NT40 fails fails ------------------------------------ QT_4_NT40 fails plays (1/2) ------------------------------------ -----Original Message----- From: lin...@li... [mailto:lin...@li...]On Behalf Of Arne Schirmacher Sent: Wednesday, May 31, 2000 12:27 PM To: 'Mark Knecht'; 'lin...@li...' Subject: RE: dvgrab data on Windows machine Hi Mark, I have changed the Type-1 code a little. Please try it. Before the fix the Type-1 AVIs would play on my Windows-NT box, but not on a Windows-98 box. I did not try both systems. With this fix I can play all two types on both systems. http://www.schirmacher.de/arne/dvgrab/dvgrab_0.81.tar.gz xdvgrab is in fact too slow, but this is actually a libdv issue. Sooner or later the libdv developers will provide a faster version, but I am quite happy that we have some working code. And yes, it requires a MMX CPU. I could not get RealPlayer working at all with my AVIs. They don't even play with a black screen. There is probably a timing issue left in the Type-2 code. I noticed with my PAL AVIs that the speed is basically correct but the video stops at about 80% with the slider still moving on. But that's probably trivial. Xdvplay is just a very simple front end to the libdv software. Maybe I add Type-2 support but that's it. I already have made a patched version of xanim, this is probably the way to go. One program supporting all kinds of video formats. The patch is still too unstable to release it (actually it displays just one frame before core dumping). Thanks for your time that you are putting in Arne _______________________________________________ mailing list lin...@li... http://lists.sourceforge.net/mailman/listinfo/linux1394-devel |
From: Mark K. <mk...@co...> - 2000-05-31 22:21:42
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Arne, Hi. Downloaded 0.81, but unfortunately no change at all on my systems. On Linux they dv1 runs at 1/4 speed, dv2 fails (expected). On Windows NT dv1 fails both RP and WMP, dv2 play on WMP at 1/2 speed, but does not play on RP. I am NT 4.0, SP-5. BTW - I filmed the wall clock in the lab, watching the second hand move for 10 seconds, so the file really is 10 seconds of data. And the file size is about 36MB. Can you check one thing for me? When I move a dv1 format file to my NT machine, if I right-click it, go to properties, and then the details tab, I see Media Length of 10 seconds, but the audio and video formats are blank. dv2 files have information there. Would you double check that you are or are not seeing the same thing? I will try this tonight at home on both NT 4.0 and 98 SE and let you know what I see. Mark -----Original Message----- From: Arne Schirmacher [mailto:ar...@sc...] Sent: Wednesday, May 31, 2000 12:27 PM To: 'Mark Knecht'; 'lin...@li...' Subject: RE: dvgrab data on Windows machine Hi Mark, I have changed the Type-1 code a little. Please try it. Before the fix the Type-1 AVIs would play on my Windows-NT box, but not on a Windows-98 box. I did not try both systems. With this fix I can play all two types on both systems. http://www.schirmacher.de/arne/dvgrab/dvgrab_0.81.tar.gz xdvgrab is in fact too slow, but this is actually a libdv issue. Sooner or later the libdv developers will provide a faster version, but I am quite happy that we have some working code. And yes, it requires a MMX CPU. I could not get RealPlayer working at all with my AVIs. They don't even play with a black screen. There is probably a timing issue left in the Type-2 code. I noticed with my PAL AVIs that the speed is basically correct but the video stops at about 80% with the slider still moving on. But that's probably trivial. Xdvplay is just a very simple front end to the libdv software. Maybe I add Type-2 support but that's it. I already have made a patched version of xanim, this is probably the way to go. One program supporting all kinds of video formats. The patch is still too unstable to release it (actually it displays just one frame before core dumping). Thanks for your time that you are putting in Arne |