So there may be some metadata work that isn’t being done properly, or isn’t really able to be done with the method LosslessCut uses chopping up the video data as simply as it does. I also think Windows movie player wouldn’t play some. Sometimes it will show up with the same original length of the video and when you play it, it will be black screen on either side of the part you kept in LosslessCut. And I have to say I have had some odd playback with different players, and also with Shotcut, on those video files I’ve made using LosslessCut. I know some video formats will work fine like that, but I’m definitely not sure about all. I think it’s very simply done like that, no re-encoding at all, so no data loss. And my guess is it actually just cuts out the data in the chunk to be removed (or more precisely it writes a new file but leaves out the chunks on either side of the selection).
It seems to cut the video only at certain points… you can’t fine tune where it cut, it’s fairly coarse. I will make an educated guess here because I’ve actually done some data processing roughly chopping up video with my own code before and I think it is indeed lossless. Also LosslessCut’s interface is really quick to use, play, hit one key for beginning point and another key for end point. And I don’t want to keep all the 5 minute long original files after the project either, so trimming them before going to Shotcut makes sense.
Some of those are 5 minute long dashcam videos where I only want to really include just 10 seconds or so. I have used it quite a bit, particularly for trimming down videos before I include them in a slideshow with Shotcut later.
I was going to mention LosslessCut if it wasn’t here already.
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