You may try iDealshare VideoGo which supports trimming almost all kinds of videos as well as audios on Mac & Windows. What’s more, iDealshare VideoGo can trim videos without reencoding (not change the original format), which will highly speed up the video trimming process, in the meanwhile, maintain the original video quality.
Key Features:
Acting as the Video Trimmer, iDealshare VideoGo can trim MP4, MKV, AVI, MOV, WMV, FLV, VOB, WebM, MPG, WTV, ASF, RMVB, AVCHD, MXF, DV, Apple ProRes, MPEG-1, MPEG-2 and etc
Acting as the Audio Trimmer, iDealshare VideoGo can trim MP3, WAV, FLAC, OGG, WMA, M4A, CAF, VOC, AIFF, APE, DTS, Opus, AU, RA, 3GA, AAC, AC3 and etc.