[GEM-dev] Playing HDV video with frame accurate seeking on Linux

[Max]

hi,

you can control VLC by a socket connection and pyext/python like this:
http://lists.puredata.info/pipermail/pd-list/2009-01/067316.html

actually while you are at it, it might be interesting for us if you  
compare the two methods.

m.

Am 25.08.2009 um 21:45 schrieb Roman Haefeli:

> hi b.
>
> if playing it in Gem is too slow (i guess, not only decoding, but
> especially in Gem also the transport to the gpu takes quite some
> processing power), it should be possible to use mplayer to display the
> movie, while using pd to control mplayer. if it's about displaying
> movies with 'big' (depends on the computer, of course) dimensions
> without any further processing, i found this setup to be more  
> performant
> than playing the movie with [pix_film] directly.
>
> just a few hints:
>
> $ mknod mplayer.control p
> $ DISPLAY=:0.1 mplayer -slave -input file=mplayer.control -fs
> yourfile.m2t
>
> DISPLAY=:0.1 assumes, that you have an xserver running on two  
> monitors,
> so that still can edit the patch, while mplayer is playing in  
> fullscreen
> mode. you can omitt it, of course.
>
> and now you can write mplayer commands to 'mplayer.pipe' from pd using
> [textfile].
>
>
> [commands(  <- e.g. 'seek -10', 'seek 300' (relative values in  
> seconds)
> |
> [t b a]
> |     |
> |     [list prepend add
> |     |
> |     [list trim]
> |     /
> [write mplayer.pipe cr, clear(
> | /
> [textfile]
>
> !! important!!
> mplayer HAS to be listening on the pipe 'mplayer.pipe', otherwise pd
> will hang until 'mplayer.pipe' is flushed (either by mplayer or by  
> 'cat
> mplayer.pipe').
>
>
> if you find a way, that is less likely to block pd (by not using  
> pipes),
> let us/me know.
>
> roman
>
>
> On Mon, 2009-08-24 at 17:06 -0700, B. Bogart wrote:
>> Hey all,
>>
>> I'm doing a new version of "Step and Repeat" and want to do the  
>> video in HD.
>>
>> I'm already shot HDV footage, which plays very well in mplayer, but  
>> not
>> so well in Gem.
>>
>> I need to do frame seeking, so I've taken my original HDV (m2t) video
>> and converted into a large mpeg2 with 1 frame GOPs and loading the  
>> TOC.
>>
>> Everything plays fine, but the playback is extremely slow.
>>
>> What are the best options for HDV playback on linux?
>>
>> I could lower the resolution, and load all frames into a pix_buffer.
>>
>> I could lower the resolution and just play the file.
>>
>> Looks like there is no "RAM" message to load the whole file into  
>> RAM and
>> playing from RAM on linux?
>>
>> The target machine is a AMD dualcore 4500+ (or something close).
>>
>> Any advice appreciated.
>>
>> Anyone know if you can do frame-accurate mpg seeking in mplayer?
>>
>> Thanks,
>> B.
>>
>> _______________________________________________
>> GEM-dev mailing list
>> GEM-dev at iem.at
>> http://lists.puredata.info/listinfo/gem-dev
>
>
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