[mythtv-users] RE: V0.17 LiveTV Jerky - POSSIBLE FIX
matt at vollmars.com
Tue Mar 1 20:26:33 UTC 2005
ebike at paradise.net.nz wrote:
>>I have a similar problem, which I was just able to fix. I was given
>>some clues from an earlier thread about Time Stretching. Balaji Ramani
>>told me to recompile (or download his RPMs) WITHOUT opengl_vsync. I did
>>this and it works perfectly. Not sure what is broken in .17, but it has
>>something to do with the opengl_vsync. I suppose it might be the new
>>NVidia drivers too, but I thought I installed those before I upgraded to
>>.17. This is definitely worth a try.
>Can you explain how to compile without opengl_vsync ??
Sure. If you have Mandrake (and presumable FC3), you can download the
SOURCE RPMs. Source RPMs for Mandrake are found here:
http://rpm.nyvalls.se/10.1/SRPMS/ . If you are compiling from CVS or
tar balls, read the README. I like RPMs to make it easy to uninstall
and track versions.
Disclaimer: I am not an RPM expert, nor a MythTV expert. If this
breaks your box, I will try to help, but newbies compiling RPMs and
installing them is not a good combination.
You only really need the mythtv-(nvidia-)0.17-3 RPM, as the rest doesn't
really need changes (I don't think). Then, you will do the following:
1) rpm -i <mythtv RPM source file>
2) cd /usr/src/RPM/SPECS (this is where the compile instruction file
3) vi mythtv.spec
4) Look for a line that says: #set default build options . Below
this, you will find options to set. I turned on xvmcnvidia (set to 1)
and turned off opengl_vsync (set to 0). If you don't really understand
what this means, I might not do this if I were you. Maybe ask Balaji
for a copy of his RPMs for Mandrake. Search the list for "Time Stretching".
5) Write and exit vi
6) Type "rpmbuild -bb mythtv.spec". You will wait 30-90 minutes for
the compile to complete. At the end you will see a bunch of lines
(hopefully) that will say "Wrote <path-to-RPM>". If you get errors,
read them. Many times there are dependencies when compiling from
source. I had several I had to install the first time.
7) cd /usr/src/RPM/RPMS/i586; ls
8) You should see a bunch of rpms. You will need to install these over
the top of your current RPMs. You can do that by typing "rpm -ivh
--replacefiles --replacepkgs <rpmfile>"
9) You will probably want the backend and frontend stopped before you
10) If all hell breaks loose, uninstall all the RPMs and re-install the
originals. Ask for more help from the list.
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