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cmake: Fix FFmpeg version regex
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@ -277,7 +277,7 @@ endif()
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if(EXISTS "${FFmpeg_avutil_INCLUDE_DIR}/libavutil/ffversion.h")
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file(STRINGS "${FFmpeg_avutil_INCLUDE_DIR}/libavutil/ffversion.h" _version_string
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REGEX "^.*FFMPEG_VERSION[ \t]+\"n?[0-9a-z\\.-]+\"[ \t]*$")
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REGEX "^.*FFMPEG_VERSION[ \t]+\"n?[0-9a-z\\~.-]+\"[ \t]*$")
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string(REGEX REPLACE ".*FFMPEG_VERSION[ \t]+\"n?([0-9]+\\.[0-9]).*\".*" "\\1" FFmpeg_VERSION "${_version_string}")
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endif()
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