Hi Piers, > Sorry didn't get back to you earlier - Been moving house!
No worries, > Yes I see the grey band at the top on my OSX [Intel] MacBook - I"m not > sure what the cause is right now - it looks some miscalculation of the > padding relating to PAL/NTSC. It seems to be okay now with my latest check-in > I was also trying to look into a performance issue Tom was seeing with > his gpl vic on OSX: > http://www.mcs.anl.gov/~turam/AG/vic.intel-osx.tom.gpl > the only odd thing I can see is when I run otool -L on the binary and > on his one I get: > /System/Library/Frameworks/QuickTime.framework/Versions/A/QuickTime > (compatibility version 1.0.0, current version 200.0.0) > > Whereas with mine (which runs fine) I get: > /System/Library/Frameworks/QuickTime.framework/Versions/A/QuickTime > (compatibility version 1.0.0, current version 70.0.0) > > I'm not clear what the "current version" refers to exactly....I've run > a trace on it and not uncovered anything strange as yet... MAC_OS_X_VERSION_10_4 > > I've reverted to ffmpeg svn -r 7110 and libswscale svn -r 21687 and > VIC > > doesn't crash in the MMX2 libswscaler code with i386 Fedora. I think > I > > might just disable the MMX2 code with a patch for the x86-64 build > by > > using a conditional in the RPM spec file for the time being. > > > Ah ok that sounds good - it tricky to know which rev of ffmpeg to go > for as they don't seem to label them 'stable' as far as I've seen. I > guess picking a release used by Linux distro isn't a bad starting > point. > > Thanks, > > Piers. > > > > Thanks, > > Doug > > > > > > > > Douglas Kosovic wrote: > > > Hi Piers, > > > > > >>> For Fedora 8 (i386 & x86-64), issue the following: > > >>> yum update AccessGrid > > >>> > > >>> which will install the mpeg4/h264 services and a new version of > vic. > > >>> > > >>> Known issues: thumbnails for H.264 and MPEG-4 appear black, but > video > > >>> windows are fine. This is because the software scaler that > comes with > > >>> FFMpeg has been disabled to avoid a crash in some MMX2 assembly > code > > >>> and > > >>> the old vic scalar doesn't support the required colorspace. I > might > > >>> have > > >>> a newer version of vic released later in the week if I'm able > to > > >>> resolve > > >>> the issue. > > >>> > > >> Thanks for sorting the RPMs out - > > > > > > Actually I haven't sorted the RPMs out yet, I wanted to use > > > 'alternatives' mechanism to release several different VIC RPMs > built > > > with different build options, unfortunately there are issues when > > > performing a rpm update from an older VIC rpm which doesn't use > > > alternatives. The workaround is convoluted and involves RPM > triggers. > > > > > > It might be for the better as more choices of VIC would only > confuse > > > things for users. > > > > > > > When do you see the crash occurring? > > > > > > With H.261 CIF video window as soon as I increase the window size, > > > color-swscale crashes. > > > > > > If I do what one version of VLC I found does, which is disable the > > > SWS_CPU_CAPS_MMX2 flag, see attached patch, it works for me. > > > > > > > It runs ok on my machines - I guess the snag may be compile- > time > > > > assembly optimisations...though at least some of it is runtime. > You > > > > could try using a later version of ffmpeg - we just need to > make sure > > > > its stable on all three platforms. > > > > > > I think it may have something to do with PIC addressing which > > > subsequently results in the wrong register(s) being used with > MMX2. > > > > > > I think I might try the Ubuntu ffmpeg patches ( > > > ffmpeg_0.cvs20070307-5ubuntu6.diff.gz ) available here: > > > http://archive.ubuntu.com/ubuntu/pool/main/f/ffmpeg/ > > > which has -fPIC and assembly related patches. > > > > > > I've tried a few version of ffmpeg and libswscale (I made sure > ffmpeg > > > and libswcale had the same datestamps). > > > > > > When I mentioned I thought the Fedora 8 livna repository's ffmpeg > was > > > built with swscale in an email a few weeks ago, I was wrong, it > isn't > > > built with swscale. > > > > > > > > > Cheers, > > > Doug > > > > > > > > > ------------------------------------------------------------------ > ------ > > > > > > Index: render/color-swscale.cpp > > > > =================================================================== > > > --- render/color-swscale.cpp (revision 4125) > > > +++ render/color-swscale.cpp (working copy) > > > @@ -70,12 +70,15 @@ > > > > > > #ifdef RUNTIME_CPUDETECT > > > flags |= (available_cpu_flags & FF_CPU_MMX ? > SWS_CPU_CAPS_MMX : 0); > > > +#if 0 > > > flags |= (available_cpu_flags & FF_CPU_MMXEXT ? > SWS_CPU_CAPS_MMX2 : 0); > > > +#endif > > > flags |= (available_cpu_flags & FF_CPU_3DNOW ? > SWS_CPU_CAPS_3DNOW : 0); > > > flags |= (available_cpu_flags & FF_CPU_ALTIVEC ? > SWS_CPU_CAPS_ALTIVEC : 0); > > > #elif defined(HAVE_MMX) > > > flags |= SWS_CPU_CAPS_MMX; > > > - #if defined(HAVE_MMX2) > > > + //#if defined(HAVE_MMX2) > > > + #if 0 > > > flags |= SWS_CPU_CAPS_MMX2; > > > #endif > > > #elif defined(HAVE_3DNOW) > > > >
