AVFMT_TS_NEGATIVE  438 extra_lib/include/ffmpeg_android/libavformat/avformat.h #define AVFMT_TS_NEGATIVE  0x40000 /**< Format allows muxing negative
AVFMT_TS_NEGATIVE  428 extra_lib/include/libavformat/avformat.h #define AVFMT_TS_NEGATIVE  0x40000 /**< Format allows muxing negative