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MPEG2 encoding on Mac OS 9?

D

DarthNvader

6502
I've been trying to encode a DV file to MPEG2 via QT MPEG2 encoder but I always get the error 'There is not enough free memory available for encodeing'

I've tried to Google search the error but no hits.

Anyone know what this error maybe?
 
I'm using QT 6.0.3 and the MPEG 2 Encoder install with DVD SP 1.5.1.

Had not checked the RAM allocation to QT, but that should not really matter as nowhere in the readme does it say anything about needing to allocate more ram to QT.

I'll give it a go tho and report back.
 
GorfTheChosen said:
And the app you’re using to do this is QuickTime Player ?

What’s its memory allocation ?
Click to expand...
You hit the nail right on the head, added a zero to the RAM sizes and it encoded the file just fine in Qemu.

I'm copying a large file on the QS right now, but I'm sure that will work on a real Mac too.
 
When I get time I'll do some benchmarks on the MPEG2 hardware encoder you sent me vs QT's encoder and see what the results are, I have quite a few Mac's to test on.

Sadly I don't have my PCI Passthrough machine setup or I could try the HW card on that too in QEMU.
 
GorfTheChosen said:
Good deal.



Running QEMU on the QS ?
Click to expand...
No I'm running it on an M2 MacBook. It took around the same amount of time to encode the same file on QEMU and a QS Mac, about 58 sec. to encode a 38 sec. DV clip with the same settings.

When I get the HW card I'll do some more extensive benchmarking.
 
DarthNvader said:
When I get time I'll do some benchmarks on the MPEG2 hardware encoder you sent me vs QT's encoder and see what the results are, I have quite a few Mac's to test on.
Click to expand...

I suspect that you'll find that the card probably works faster (hardware encoder + fixed bit rate) vs. the QT encoder which if I recall correctly is variable bit rate and should produce smaller file sizes.

Although that may depend on the proccessor(s) in the QS ... faster vs slower proc, single vs dual.

Definitely be interested in the results in any event.

DarthNvader said:
Sadly I don't have my PCI Passthrough machine setup or I could try the HW card on that too in QEMU.
Click to expand...

It's still here ... if and when ... ;)
 
GorfTheChosen said:
I suspect that you'll find that the card probably works faster (hardware encoder + fixed bit rate) vs. the QT encoder which if I recall correctly is variable bit rate and should produce smaller file sizes.

Although that may depend on the proccessor(s) in the QS ... faster vs slower proc, single vs dual.

Definitely be interested in the results in any event.



It's still here ... if and when ... ;)
Click to expand...
I have a Dual MDD as well, and some G5's to test the SW encoders.

it will be interesting to see how well the HW encoder fairs.
 
What hardware encoder are you testing?

I've got a Wired Digital Mediapress PCI card in my Quicksilver though I haven't used it in years. It will do realtime conversion when capturing from composite, s-video, or SDI (with a breakout cable). It will also transcode from multiple formats to MPEG-2. I think it has two-pass capability but I'm not sure. I may also have the earlier Mediapress PCI card that just converted DV files to MPEG-2. I'm pretty sure the Digital Mediapress worked in OS 9 and OS X but the earlier Mediapress was OS 9-only.

There are examples of both cards up on eBay now.

I've wanted to try out the Sonic Solutions cards but when I was looking into them a few years ago it seemed like you'd have to find a full, working system with software due to need for keys (possibly dongles as well) and no way to activate software that had never been used.

Its far easier and much, much, much, etc... faster to just run Handbrake on a PC but that's not why we collect this stuff.
 
quicksilver said:
What hardware encoder are you testing?

I've got a Wired Digital Mediapress PCI card in my Quicksilver though I haven't used it in years. It will do realtime conversion when capturing from composite, s-video, or SDI (with a breakout cable). It will also transcode from multiple formats to MPEG-2. I think it has two-pass capability but I'm not sure. I may also have the earlier Mediapress PCI card that just converted DV files to MPEG-2. I'm pretty sure the Digital Mediapress worked in OS 9 and OS X but the earlier Mediapress was OS 9-only.

There are examples of both cards up on eBay now.

I've wanted to try out the Sonic Solutions cards but when I was looking into them a few years ago it seemed like you'd have to find a full, working system with software due to need for keys (possibly dongles as well) and no way to activate software that had never been used.

Its far easier and much, much, much, etc... faster to just run Handbrake on a PC but that's not why we collect this stuff.
Click to expand...
it's the OS 9 only MediaPress PCI card( 23770 ).

Just ran a quick test on the card, 48 sec. to encode with the card from a DV file, while QT took 60 sec on the same file with the same 9 mbps video encoding.

The DV file is one I transcoded from an example MPEG2 movie file that can be found on the web, but somehow the transcoding lost the audio track.

This is on my QuickSilver 800MHz G4 with 1 GB of RAM and an old 80GB spinning ATA drive, virtual memory is off per the warnings of the card( OS 9 doesn't enable VM with greater than 768MB or RAM anyways. ).

I'm going to give it a go across several machine, both SW encoding and HW encoding. Got to dig out all my old PPC stuff, really interested to try it in my Beige G3 upgraded with a G4 433MHz as I have the Wings card in there and I can capture some DV of live TV in BTV then test that file with audio.

The DMP PCI card transcodes a audio file to PMC audio.

I'll also try SW encoding with OS X and QT/DVD SP on the Dual 2.0 GHz G5 and see what times I get on the same source file.

All wonderfully worthless, but I love to benchmark things, and I got a great deal on this old PCI card, so why not.

I took a very hard fall on the ice and I'm all busted up, so this should keep me warm and inside while I heal.
 
I'd really like to report some benchmarks of HW MPEG2 encoding vs SW with QT on the Beige G4, but QT6 only seems to save one frame of the video file when I chose to export to MPEG2.

I found a bad stick of RAM and I was hoping that was the issue, but removing it and the issue persists????

Anyone with a Beige box with a G4 and DVD Studio Pro with QT Pro can test this for me to see if it's and issue with my Mac or it's just a QT issue with the CPU speed just being slower than they ever tested this with?

433MHz G4 ZIF 217Mhz L2 1MB.
 
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