[x264-devel] Bug: horizontal stripes on PPC with Altivec since snapshot 20081125

[Guillaume POIRIER]

Hello,

On Sat, Dec 13, 2008 at 12:03 AM, Josef Drexler <joe-x264 at jdrexler.com> wrote:
> On Dec 12, 2008, at 8:46 PM, David Wolstencroft wrote:
>> Josef,
>>
>> I'll try this out when I get home today.
>>
>> Can you give me some more information, such as source dimensions of
>> the video?
>
> The source is 1024x576 h.264 video which I'm transcoding to 720x576
> with SAR=64/45 (16:9 at PAL resolution). I believe mencoder would do
> the scaling, so the input to x264 is 720x576.
>
> I've now tried another sample, for which the problem doesn't appear
> only as stripes but rather generally discolored areas too. In case it
> helps for reproducing the problem, I've uploaded a small sample
> together with the resulting good and broken encodes at http://
> jdrexler.com/home/x264-ppc-regression/

Thanks for the sample. I however can't reproduce the problem here on Tiger.

I used the commandline:
mencoder ~/Desktop/input.mkv -nosound -ovc x264 -x264encopts
bitrate=900:frameref=6:bframes=3:direct_pred=auto:b_pyramid:weight_b:me=umh:mixed_refs:subq=6:turbo=1:pass=2
-o out.avi

MEncoder is r28145, x264 is r1053.

I tried to compile with gcc: 4.0.1 (Apple Computer, Inc. build 5370).
I also tried with gcc-mp-4.4 (GCC) 4.4.0 20081128 (experimental) from MacPorts.

And I still can't reproduce your problem.

Guillaume
-- 
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