無法為armv7和armv7s編譯FFMpeg

Question

我嘗試了幾種最新的FFMpeg版本（2.1.4和2.2 rc2），但由於以下錯誤而無法編譯：

INSTALL libavformat/libavformat.a
AS  libavcodec/arm/vp8dsp_armv6.o
AR  libavresample/libavresample.a
CC  libavcodec/ass_split.o
CC  libavcodec/assdec.o
CC  libavcodec/asv.o
CC  libavcodec/asvdec.o
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2163:11: error: branch target out of range
        b vp8_put_epel_h6_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2181:11: error: branch target out of range
        b vp8_put_epel_v6_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2199:11: error: branch target out of range
        b vp8_put_epel_h6_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2217:11: error: branch target out of range
        b vp8_put_epel_v6_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2235:11: error: branch target out of range
        b vp8_put_epel_h4_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2253:11: error: branch target out of range
        b vp8_put_epel_v4_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2271:11: error: branch target out of range
        b vp8_put_epel_h6_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2289:11: error: branch target out of range
        b vp8_put_epel_v6_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2307:11: error: branch target out of range
        b vp8_put_epel_h4_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2325:11: error: branch target out of range
        b vp8_put_epel_v4_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2344:11: error: branch target out of range
        b vp8_put_bilin_h_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2362:11: error: branch target out of range
        b vp8_put_bilin_v_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2380:11: error: branch target out of range
        b vp8_put_bilin_h_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2398:11: error: branch target out of range
        b vp8_put_bilin_v_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2416:11: error: branch target out of range
        b vp8_put_bilin_h_armv6 + 4
          ^
/Users/erikvillegas/Development/ffmpeg64/ffmpeg/libavcodec/arm/vp8dsp_armv6.S:2434:11: error: branch target out of range
        b vp8_put_bilin_v_armv6 + 4
          ^
make: *** [libavcodec/arm/vp8dsp_armv6.o] Error 1

問題出在libavcodec庫中。 我可以為arm64和x86_64進行編譯，但不能為armv7和armv7s進行編譯。

我正在使用以下構建腳本： https : //github.com/kewlbear/FFmpeg-iOS-build-script

有任何想法嗎？

Answer 1

./configure --disable-asm將擺脫此錯誤。 但是，它會禁止全面使用內聯匯編代碼，因此請注意性能/電池消耗。