ffmpeg illegal instruction h264 encode G3

[theos911]

Attempting to downsize a video file with brewed ffmpeg

https://gist.github.com/theos911/5384076

[mistydemeo]

Hm, so this is actually happening in x264:

Thread 0 Crashed:
0 libx264.125.dylib 0x0046f088 x264_frame_pop_unused + 8
1 libx264.125.dylib 0x004fc080 x264_encoder_open_125 + 3680
2 libavcodec.54.dylib 0x01368e74 ff_lag_rac_init + 14580
3 libavcodec.54.dylib 0x014cea6c avcodec_open2 + 2780
4 ffmpeg 0x00016654 term_init + 37644
5 ffmpeg 0x00017840 main + 420
6 ffmpeg 0x000026dc start + 812
7 ffmpeg 0x000023e0 start + 48

From the ffmpeg output:

[libx264 @ 0x2007000] using cpu capabilities: none!

...so it doesn't look like x264 is incorrectly trying to use Altivec.

I was able to use x264 without crashes on a G4, where it did use Altivec.

For comparison, can you try the x264 binary that ships with x264 and see if that crashes too?

[mistydemeo]

Can you post your x264 build logs?

[theos911]

How would I use the binary?

[theos911]

x264 log: https://gist.github.com/theos911/5384171

Currently rebuilding ffmpeg to link against the newly built x264 library and will see if issue persists

[mistydemeo]

asm: yes

Hm... wonder if disabling asm on PPC would help anything.

[theos911]

Freshly built ffmpeg on the freshly built library gives the same error. Try building x264 without asm, rebrew, & relink? (If so, how do I disable it?)

[mistydemeo]

Try this:

brew install https://gist.github.com/mistydemeo/e41212fc5ab3ad6a9f72/raw/69bb470ed0b7ed7d20ac88442c358424a363cb0a/x264.rb

There's no need to rebuild ffmpeg after reinstalling x264.

[theos911]

Encoding x264 now works without a problem, Thanks.

[theos911]

I rebuilt the packages with debug and ASM enabled in x264. Here are the build logs and another conversion attempt.

https://gist.github.com/theos911/5462715

[mistydemeo]

Once you've build ffmpeg with debug enabled, can you try it with gdb using ffmpeg's instructions please? Thanks!

[mistydemeo]

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