avformat/concatdec: clip outpoint - inpoint overflow in get_best_effort_duration()
An alternative would be to limit all time/duration fields to below 64bit Fixes: signed integer overflow: -93000000 - 9223372036839000000 cannot be represented in type 'long long' Fixes: 64546/clusterfuzz-testcase-minimized-ffmpeg_dem_CONCAT_fuzzer-5110813828186112 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpegSigned-off-by:Michael Niedermayer <michael@niedermayer.cc>
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