At the moment, the yadif GStreamer plugin fails to compile under the x32 ABI due to assembly code. As such, it blocks the build of gst-plugins-bad altogether, which is quite unfortunate. As such, the yadif plugin should be disabled when building for x32 targets, for instance like this: use abi_x86_x32 && myconf+=( --disable-yadif )
The upstream bug report is in See Also. yadif needs to be disabled until that is fixed.
Created attachment 448874 [details, diff] disable asm code on x32abi....
Yes, this patch works fine on x32.
This affected gstreamer plugin got removed upstream 3 years ago, so the bug isn't applicable anymore. deinterlace element with method=yadif property is the replacement.