Re: How to fix choppiness in H264 playback

On 01/05/13 19:31, Richard Cavell wrote:
> Hi, all.
>
> I use the latest version of VLC on OS X 10.8, on a MacBookPro8,1 (i7 
> version) with 8 gig RAM.  I regularly play movies, each of which is 
> about 1 gig of h264 at 720x576x25.  Sometimes I get my computer to do 
> disk-intensive work (video editing using Adobe CS) in the background 
> while I watch my movies.  But when the video editing hits a part 
> that's filled with compositions/edits, the movie becomes choppy.  If I 
> pause and then unpause the movie it gives VLC a chance to catch up, 
> but it sometimes becomes choppy again within a few seconds.  I wish 
> that, while I pause the movie, VLC would cache further ahead.
>
> If the bottleneck is disk I/O, is there some way that I can tell VLC 
> to cache more of the movie in RAM to avoid disk I/O on the fly?  If 
> the bottleneck is CPU decoding, can I somehow cache that, or tell it 
> to degrade more gracefully than it does?
>
> Richard
>
>
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There must be an ionice command on your system, on Linux (Unix) there is 
one. You can use it to set i/o priority of various programs.

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