Date: Mon, 20 Mar 2006 20:44:07 +0000
From: "Matthew Hanson" <[EMAIL PROTECTED]>
Subject: Re: [LIB] Margi DVD-To-Go problems
From: Jose Tavares <[EMAIL PROTECTED]>
On Sat, 2006-03-18 at 23:17 -0800, Matthew Hanson wrote:
> Check this out:
> http://pike.fireflyinternet.co.uk/Ap13_clip2AVISynthed.mpg
I saw this sample ..
I think you have to fill the source to get something like 384x288 and
then input it in TMPGEnc as a VGA source 1:1 .. don't you? If not, I was
doing one step that I didn't need .. :)
I'm not really clear why that .avs script works Jose. I stopped getting
feedback from my Doom9 posts after I was handed the script. So my questions
on just how those apsect ratios where arrived at, and why they work are
things I still don't know at this point. But the widescreen files it
outputs only seem to display properly in Windows Media Player. I get a
'kind of' 640x480 'squarish' display display from the same file in PowerDVD
on the desktop... though I've been assuming I can probably go into
PowerDVD's settings and fix that. Doesn't matter, as the old WMP v6 on the
Libby is the most resource friendly media player I can find for the Windows
OSs.
Thought you were objecting a (S)VCD standard ..
I'm not following you there Jose. I've been making VCDs for some time, and
have been relatively happy with them. So I have no objection real to them.
I >would< like to get this Margi card to play standard MPEG-2 DVD files if I
could get a sharper image. But short of that, I'm happy to get these
tweaked VCD (not SVCD) files to display the full 800 pixels of the Libby's
screen.
For not standard mpegs, you can use some factor for framerate and
decrease your bitrate..
It's easy enough to lower the bitrate in TMPGEnc from it's default of
1150kbps to output a bit smaller files. There's a little free utility
called Bearson's Bitrate Calculator that helps you find a bitrate that will
fit a VCD onto a 700MB CD-R easily if you don't want to figure out the math
on your own.
I've been archiving my VCD files to DVD+-Rs, and at some point will want to
ask about recommendations for DVD drives for the Libby to access them. For
fastest transfer rate to the Lib's HDD, I'm wondering if I should go to a
USB2 DVD drive over PCMCIA.
Old libby has a poor sound too.. If you're considering to use subtitles
with the libby's sound speaker, you can convert the audio to mono and
use the worst quality.. Anyway, you'll be reading :)
Haven't yet run into subtitles. They don't affect the rate of playback, or
slow it down at all, do they? You're just saying you can convert to mono to
shrink file size a bit, right?
The Libby's sound for music isn't stellar. Last year David Chien pointed me
to an EBay auction for a fantastic old W98-based TDK sound card that plays
through my HIFI beautifully. I don't find the Libby's sound quality too
terribly bad for these custom 16:9 VCDs though. The demuxed dolby .ac3
files are pretty high quality, and TMPGEnc transcodes them with up to
384kbps MPEG-1 Layer II audio. I haven't yet tried listening to the audio
with the TDK yet, but I assume it'd be pretty good.
I have some experience with XVid/DivX -> (S)VCD..
Well... one problem there is the original DVD source files have already been
transcoded down in video and audio size and quality to XVid/DivX format. By
transcoding a 2nd time to MPEG-1, you're going to loose even more.
I did it too many times to watch movies on my DVD Player at home..
I used Virtualdub for processing frames, resizing, cropping, filling,
etc, etc and started a frame server inside virtualdub..
What was involved with that? Did you use VDub, or VDubMod? And where other
apps involved in frame serving?
This frame server created a type of fifo or a kind of link. You open
this file (fifo/link) in TMPGEnc and you can start encoding directly
what's being processed in virtualdub.
Am I understanding this correctly? You end up with VDub process the video,
and simultaneously feeding the data to TMPGEnc which is compressing to
MPEG-1 while VDub is processing?
The tip is to use the frame server and write directly to .mpg .. The
trick is to configure the filters correctly on virtualdub.
Which filters did you use, and for what specifically?
I've been using vsoDivxToDVD to convert XVid files to MPEG-2 .vob files for
burning them right to DVD-Rs that comply with the home DVD playback
standard. As I've been merging DVD .vob files on one single one, and then
processing through the .avs script procedure I've described successfully
without having to convert them to fully complient MPEG-2 files... I assume I
could do the same for XVid/DivX files converted to .vob files.
I've beem downsampling videos to watch on my Nokia 6600 too. It has an
ARM 104MHz. When comparing it to my old libby 70CT, they have almost the
same processing power. So, on Nokia's screen, the little XVid is played
ok, but on 70CT the video plays in a really small resolution or trying
to using acceleration on XFree86/mplayer, it returns too much skipped
frames when playing in fullscreen.. On 70CT I quit trying even
playing .mpg or downsampled XVid ..
It would seemt hat something's going wrong in the process of transcoding
your video files. I had all kinds of problems finding a process that would
get a widescreen MPEG-1 file to play on the Libby correctly. But I've never
had any problem with my Lib playing files I make from TV captures. Those
are encoded directly to 706x480 MPEG-2 DVD complient .mpgs, and from there
get transcoded to VCDs in TMPGEnc that play fine on the 110 .
You're running Linux eh? Did that sample file of mine play properly for
you?
Video files are extremely complicated, and there seems to me hundreds of
approaches to achieve any number of ends. And then where one procedure may
result in a file that plays back well in one device or piece of software, it
may not in another. I'd almost given up on creating a MPEG-1 file that
would display 800 pixels wide on the Libby before having that .avs script
handed to me.
Matt
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