Re: [CinCVS] constant hangs on HDV project

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Hi Kevin,
Thanks for the response.  The HDV files I'm working with are composed of the 
following:

MPEGTS (transport stream) container
-MPEG2 video: 1280x720, 29.97fps, 18300br
-MPEG audio layer 2: 48.1khz, 2 ch, s16le, 384kbit

In addition, I have two tracks (stereo pair) of wav files sampled at 
16bit/48.1khz.  I initially said four tracks of video, but I have recreated the 
project with two extra audio tracks only (as I will explain below).

Here is a little more about the purpose of the project:
The project is a video of a rock band.  The original audio track quality was 
poor, so I am substituting the stereo audio output from a multi-track recording 
of the gig.  So all I am doing is syncing up a second source of audio to the 
original track.  Simple, no?

I worked on the original project file a little more last night.  I noticed the 
output of the command window was saying "File too large", so I re-rendered only 
a portion of the original MPEGTS using AVIDemux (great program, by the 
way..really fast).  My source MPEGTS file shrank from 7GB to 2.7GB.  However, 
2.7GB is still larger than the magical 2GB mark.  I am not sure why I should be 
getting that message as the standard Cinelerra compiler flags are set for 
largefile sizes.  I reviewed the message board regarding the latest messages 
about "File too large", but there is no definitive answer on the source of 
these messages.  But the fact that the file is greater than 2GB is probably why 
I am getting "File too large".

I recreated the project, and now there is less hanging, but the hanging still 
happens when I zoom in to sub-second time frames and move the wav tracks ever 
so slightly to better align with the audio track from the original video.  This 
happens every other time that I move the tracks.

Regarding swap, I will check this when I get home from work tonight.

scott

> I suspect 2G is not "a lot of memory" when HDV is used.
> 
> Scott,  would you include what codecs are being used in your project for
> input material?  That determines loading and playing memory behavior.
> 
> Without any swap, it will be impossible to tell if you really needed swap or
> not.  (ie.  You can't tell if your project would run faster without swap,
> because you can't check if it was never used.)  You're long pauses suggest
> there may be a memory issue though.  The advice to try 4G of swap would help
> to rule out memory exhaustion as the issue.  (You can use swapon and swapoff
> to test.)
> 
> Kevin
> 

--- Begin Message ---

Title: Re: [CinCVS] constant hangs on HDV project

On 2007-02-05 07:39, Nicolas Maufrais wrote:
> Hello,
>
> On Mon, Feb 05, 2007 at 06:28:31PM +1100, jostle wrote:
> > Your 'top' output reveals a pretty significant problem. You are running
> > with no swap space!
> >
> > > Swap:        0k total,        0k used,        0k free,  1298492k cached
> >
> > I suggest that you re-configure your machine to have around 4GB of swap
> > and see if that helps.
>
> Heroine Virtual Ltd recommends disabling swap when a lot of memory is
> installed.
>

I suspect 2G is not "a lot of memory" when HDV is used.

Scott,  would you include what codecs are being used in your project for input material?  That determines loading and playing memory behavior.

Without any swap, it will be impossible to tell if you really needed swap or not.  (ie.  You can't tell if your project would run faster without swap, because you can't check if it was never used.)  You're long pauses suggest there may be a memory issue though.  The advice to try 4G of swap would help to rule out memory exhaustion as the issue.  (You can use swapon and swapoff to test.)

Kevin

--- End Message ---