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I've noticed my Pioneer 5 disc DVD player will stutter when playing back DVD-R burned from 2 specific MPEGs. Its rare (2/140) but I've burned these two files a dozen times using 4-5 different media brands on different burners at different burn speeds with EXACTLY the same stutters in EXACTLY the same position! The MPEG itself has no stuttering. Same disc plays back great on 3 other players no problem.
I call them them "EVIL MPEGS"! If there were 3 then I could call them the "BURMUDA MPEGS" for all the coasters lost in there!
I burn mostly 352x480. This problem has never occured with 720x480 but this is so rare a problem I cannot say this is the cause. - HAS ANYONE SEEN THIS?
Is it encoded with VBR? Since you use 352x480 resolution your average bitrate is probably quite low. But the max bitrate may be set high like 8 Mbit/s or something? Then if you have sudden action part of the movie or something that may cause a quick bitrate peak perhaps the disc must spin up quite fast to avoid VBV buffer underrun? I'm just speculating here.
When you encode full resolution your average bitrate is higher and the bitrate maximums is perhaps reltively less higher than the average bitrate. The disc does not need to speed up that fast. Perhaps some DVD players have better DVD-drive motors that can speed up and down the disc faster and then you won't get those stutterings on the better players.
So what can we do about it? Well, maybe you don't need as high maximum bitrate at half resolution. Perhaps it is enough to set maximum 6000 kbit/s and then the player does not need to speed up the disc so much from the average bitrate. I think you have to do some experiments and see if this can be solved with tighter bitrate spans in VBR encoding, or if it's a media problem or a problem in the mpg-file.
Other than that I have not seen any compability problems with half resolution DVD on my player.
Thus I doubt I exceed ANY manufactures specs.... Are there minimum specs...?
Also the stuttering is constant through the mpeg and does not "seem" to be related to activity. In fact the source is a VHS of someone giving a speech! <Yawwwnnn...>
Re: I fix my BR to 3 Mb - good enough for VHS quality
November 23 2002, 3:32 PM
Hey Nap,
My 352x480 discs won't play on my neighbors PC-DVD player ( and old creative labs 2x) but any 720 or 704x480 are fine. Same discs. It's kinda strange,but the only difference is the 352 part. Have you tried running one of your 352x480's through DVDPatcher changing the headers to 720x480? It doesn't take very long, might be worth a try.
FOOLING the program by changing the mpeg header to somethin the file is not causes Spruce up to crash on loading OR when adding the file to the project workspace.
It was a good idea so I had to try it but didn't work.
My next idea is to RE-CAPTURE the same footage and see if there might be something (??) with the first capture only (rather than the source).
After this I will RE-CAPTURE the same footage at a full 720x480.
The source is a BARNEY tape (disposable) and a speech... I'm doing this out of curiosity - the coasters are starting to pile up.... 20+ now.
Ahhhhh.....I forgot you were using SpruceUp. Works just dandy with DVD Workshop, I patch every file from 4:3 to 16:9 with DVDPatcher (ver 105b) oterwise my standalone won't go into progressive mode by itself.I do the whole file too, not just the first header.
NOt sure how to use it (just starting). After all the edits and menus it asks for the format of the DVD to burn - What I cannot believe is that one of the options is not "SAME AS SOURCE"! I've captured DVD ready mpegs with settings that. The options do NOT include my specific settings. I do NOT want to re-encode.
Hey Nap,
I don't recommend using Workshop to do the burn....just let it make your title set and then use Nero or equiv. to burn. If you click on 'make disc' in the 'final' stage, it asks you what kind of file you want....click 'custom' and then make sure you put in the values your clip was encoded at.Bitrate,resolution and audio format/bitrate. If you do this, it won't re-encode anything, and take the file as is.
With PAL source I don't need to patch the header to use 352x576 mpeg2 source in SpruceUp, it works without problems. 352x480 is a valid DVD resolution for NTSC so you should not patch it to something else!
The patching is only necessary when importing not valid DVD resolutions like when trying to use SVCD resolution on a DVD. To do this you should first patch the first mpeg header only to 352 ot 720 width. Then start spruceup, import the source and save the project. Close SpruceUp and patch the source file header back to the original setting! Then start spruceup again and load the project, do the authoring as usual. The patching is only done to fool spruceup to make it possible to imort the file. When it's done the file is restored to original, otherwise it won't work.
Heh,Heh @ Nap,
Well congrats on your new non-computer addition! I've got 6 if you decide you want another one without going through all the "trouble" of making another.
