FLV_VIDEO_FRAMETYPE_OFFSET  115 libavformat/flv.h     FLV_FRAME_KEY            = 1 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< key frame (for AVC, a seekable frame)
FLV_VIDEO_FRAMETYPE_OFFSET  116 libavformat/flv.h     FLV_FRAME_INTER          = 2 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< inter frame (for AVC, a non-seekable frame)
FLV_VIDEO_FRAMETYPE_OFFSET  117 libavformat/flv.h     FLV_FRAME_DISP_INTER     = 3 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< disposable inter frame (H.263 only)
FLV_VIDEO_FRAMETYPE_OFFSET  118 libavformat/flv.h     FLV_FRAME_GENERATED_KEY  = 4 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< generated key frame (reserved for server use only)
FLV_VIDEO_FRAMETYPE_OFFSET  119 libavformat/flv.h     FLV_FRAME_VIDEO_INFO_CMD = 5 << FLV_VIDEO_FRAMETYPE_OFFSET, ///< video info/command frame