Bug#1103936: Bug# #1103936 ffmpeg: Wrong result for h264 encoding on ppc64el

[Trupti <trupti@linux.ibm.com>]

On 2025-06-09 10:05, Rafael Laboissière wrote:
> Done!
>
> Best,
>
> Rafael Laboissière

Hello,

I've investigated this build failure on ppc64el and have confirmed the 
root cause is a bug in the Altivec code within libx264.

While recompiling libx264 with assembly disabled (--disable-asm) fixes 
the build, it's not a viable solution due to a massive performance 
regression. A benchmark I ran showed that the:
6.9s with Altivec and 54.3s without Altivec .

Given the performance impact, how would you recommend we proceed with 
resolving this?


Thanks and Regards,
Trupti