Rendered Mpeg2 720p doesnt play on other system.

[D. Eric franks]

I don’t know about the audio running slow, but the overall stuttering could be a hard disk drive bottleneck. It’s pretty likely that the one on your workstation is faster. Data rate is what will choke the HDD, so you might want to render to a MP4 file format (MainConcept AVC). 10-20Mbps, 2-pass VBR MP4 will look better than equivalent/higher bitrate MPEG-2, with the downside being that MP4 is more challenging for the processor, but since that doesn’t sound like an issue for you, it’s worth a try.

__________
I never enjoyed working in a film.
— Marlene Dietrich —
https://videopia.org

[Viki Kumar]

Dear Eric,

I checked the system and task manager shows just 10-20% cpu usage while playing the files. Also unfortunately the software im using to playback the files only accepts avi or mpeg. Thats the reason im trying to render to mpg since it offers sharper output than .avi i think, but correct me if im wrong. I wouldnt mind an avi alternate. The reason i have only playback with this presentation software is because it handles the video along with controlling motion automated equipments that are part of the show. And it does everything in programmed sync so i have no other option to playback.

This file’s bitrate is 30Mbps and runs smoothly on the other system which has the same specs SATA HDD as the problem system in question. I have a seperate media player which runs this same mpeg from an even low spec IDE drive. So i doubt its a throughput problem.

Any other suggestions of what i can try ?

Thanks

[D. Eric franks]

What software? I have some experience with a few presentation apps and maybe there is an alternative. Does the software take WMV?

30Mbps is a (relatively) very high data rate: 7200RPM drives won’t typically choke on that, but 5400RPM laptop drives will be marginal.

Have you tried DivX in an AVI wrapper? There are other MPEG-4 (h.264) codecs that will work in AVI as well, provided both machines have the codec installed.

[Viki Kumar]

The system is a dual core 3 ghz system, 4 gb ram, nvidia 7300GS video card (which ironically has PUREVIDEO HD hardware mpeg2 decoding), The video runs from an INDEPENDENT SATA 7200rpm drive 🙂 and was benchmarked (Via HD Tune) on the same system as having 90Mbps average transfer rate. Completely defragged etc etc etc. Each and every element that could optimize disk speed was taken care of. All throughput factors have been taken into consideration. Im very sure this is not a disk bottle neck issue.

It would be worthwhile to note that the same system plays YUV and UNCOMPRESSED 720p. Im sure your aware what kind of transfer rate that is :).

This something to do with decoding the mpeg 2 im sure. It stutters in windows media player itself. Are you aware of any mpeg2 hd codecs which might do the trick ? Divx in an avi wrapper wont have the quality of Mpeg2 HD right ?

On a side note what presentation softwares can you suggest which can playback HD video to a 2nd monitor from the pc but will hold a black screen displaying only the video and nothing else. No mouse no desktop nothing should be visible on the 2nd monitor. All playback controls and player etc are shown only on the 1st monitor.

[D. Eric franks]

OK, so it ain’t the HDD (and suggesting 24p to save 20% on the data rate won’t help… dangit!).

DivX might do the trick. Worth a try. For the same data rate you’ll actually get better quality with DivX flavored H.264 than MPEG-2, but if it’s some sort of processing issue, then – because DivX is more computationally intensive – you’ll have more problems. Anyhow, it might work. There are other MPEG-4/H.264/AVC options with an AVI wrapper as well.

There seem to be a lot of video players (most? all?) that will do what you want, but I’m not sure about presentation apps. The church industry has some good ones, like MediaShout (which was my first suspicion on what you were using, because I’ve seen lots of video file compatibility issues with that software over the years).

[Viki Kumar]

Hi Eric,

No the software im using is called DCon.

You actually mean all softwares will do what i want ? Hardly i think. You mean they all can hold a black screen on the second monitor/lcd always (Continuously from the moment they are started up) and show all the play controls exclusively on the 1st monitor. Strangely im yet to seen one software like that, except for some pretty obscure ones. Can you name the ones you think will work ? I believe the software im using was developed with a guy who programs in C++ so it was more like custom designed because they could hardly find 1 software that does what im reffering to.

Also there is no H.264 rendering in Vegas i think ? Where is that render profile ? And the same for Divx Avi. Can you guide me under which section ? Except for Divx which also will not render HD if im right.

Regards

[Viki Kumar]

Eric,

Im surprised that you said you know about SEVERAL such presentation softwares. However you have not named even one. Also you told me to render to several alternate formats all of which dont even exist in vegas. Were you serious about those comments ?

Vik

[John Rofrano]

> Also there is no H.264 rendering in Vegas i think ? Where is that render profile ?

Vegas has two render types that output H.264. Use either MainConcept AVC or Sony AVC.

> And the same for Divx Avi.

You would have to have a DivX encoder installed and then use the Video for Windows render type to create a template that uses the DivX codec.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Viki Kumar]

Dear John,

I dont know if im missing something. I tried Maninconcept MP4 and the aulity at maximum is horrible. Like the worst quality compression on youtube. This is from HDV footage that too.

Regards

[John Rofrano]

> I tried Maninconcept MP4 and the aulity at maximum is horrible. Like the worst quality compression on youtube.

How did you set the quality to maximum? What you need to do is provide a high enough bit-rate to encode your content properly. If you are looking for HiDef output then use the Sony AVC render type with the “Internet 16:9 HD 30p” template (from Vegas Pro 9.0). This should give you great quality at 720p.

~jr

http://www.johnrofrano.com
http://www.vasst.com