Thread: RE: dvgrab-0.81 testing results
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From: Arne S. <ar...@sc...> - 2000-06-02 10:50:14
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Hi Bernhard, thanks for the extensive test report, what was the application that you used to create the well - playing AVI files under Windows? Can you provide the URLs for the tools you mentioned? Please enter them in http://www.schirmacher.de/cgi-bin/dclinks.cgi somewhere or just send an email. I have already fixed a bug where I used 44.1 KHz in one field and 48 KHz in another. It is in fact mono (currently), because there is no advantage storing stereo silence compared to storing mono silence. Arne -----Original Message----- From: Bernhard Schwall [SMTP:bs...@gm...] Sent: Friday, June 02, 2000 1:06 AM To: lin...@li... Subject: dvgrab-0.81 testing results Hallo Arne, I've played with your new dvgrab-0.81 and tested the resulting AVI under Win98 and w2k. My system: Athlon 700, 192MB ram, Maxtor 60GB EIDE HD, ExSys 6500, Sony TRV310E (Pal) w2k: Type-1 playes with media player but it has a lot of problems playing it realtime. AVIs recorded under Windows I can play realtime without any jumps in the playback in 352x288 (or whatever resolution the CoDec really uses, but it's quarter Pal res.). The dvgrab AVI often jump within the first playback. Playing back it more times (so the short 300 frames AVI is in the cache) it plays correctly. So it looks like the format is a bit different to the "expected" format. Type-2 even plays with the media player (without sound of course) but also with some jumps in the first playback. The properties say it has a length of 13.6 but it only has 12 seconds (300 frames). And also the sound type is told to be 44.1 KHz with 16 bit and mono! The original was 48 KHz, 16 bit and stereo. Copying the Type-2 AVI with VirtualDub (with direct stream copy) the file gets shorter (43246 KB to 43327 KB) and now has the correct length (12 sec.). Sending back the files to camera using DVIO I had success with the original Type-1 AVI and the VDub-copied one. Playing the dvgrab-Type2 AVI it stops within the playback and skips some frames to get back into sync. win98SE: playing files with media player is no problem. And even playing back them to the camera is neither a problem with Type 1 nor with Type 2. So for me it looks like either a problem with my system under w2k (HD performance) or a problem with the DV codecs. I've installed the Adaptec DV-CoDec under w2k but haven't done this under win98SE. Using benchmark tools to get the HD performance I get the same results under w2k and win98 (over 9MB/s for read and write) so normally this shouldn't be a problem. And w2k tells me that it's using DMA access for the HD and the benchmark tells me that the CPU load is between 2% and 6% depending on the HD used. This is equal for w2k and win98. BTW I'm using the original ms-dv driver under w2k and win98se with the upgrade for win98se from MS (243174up.exe). w2k also has an installed ulead video studio 3 version. Greetings Bernhard _______________________________________________ mailing list lin...@li... http://lists.sourceforge.net/mailman/listinfo/linux1394-devel |
From: Bernhard S. <bs...@gm...> - 2000-06-02 22:28:26
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Hi Simon. On Fri, 2 Jun 2000, Simon Vogl wrote: > Hi Bernhard, > > Is it possible that your AVI gets scattered around the DOS partition by the Linux > vfat code? This could cause the described effect - On the first run, the cache is > filled, but delays from long seeks cause playback problems. On the next runs, most > of it is in RAM, jand the delays go away... Well it is a dedicated video partition formatted as vfat which was nearly empty as I recorded the AVIs. The interesting thing is that the same AVI (I didn't move it on the partition) played without problems under Win98 (with the MS decompressor). So I think it's either a problem with the IDE-Driver for the Irongate chipset under w2k or a DVSoft problem or whatever else. But moving a windows recorded type-2 AVI to the vfat partition the AVI can be played back without any problems under w2k. Moving the original dvgrab AVIs to a ntfs partition the type-1 files plays without problems but the type-2 frame still looses some frames. But this meight be caused by the wrong sound settings in the header of the dvgrab-0.81 AVIs. I'll test it again with dvgrab-0.82 this weekend. Greetings Bernhard |