Bug Report Can't cut/trim OBS .mp4 output

R

relatively_tasteless

New Member
Whenever I screencap, i am not able to cut or trim the output .mp4 file with any software I have tried (incl. Quicktime, MPEG Streamclip, DaVinci Resolve, etc.). The furthest i got was trimming a file with Quicktime, and on my computer it looked like it was actually trimmed. When I uploaded that file to my website though, the video was displayed in full length again, as if I didn't trim it... I am on macOS and have confirmed that issue for multiple versions of the OS. I am using the x264 Codec and I have read that reinstalling the Codecs might be a solution, but idk how that is possible on macOS...

Thanks in advance!
 
Narcogen

Narcogen

Active Member
Nothing to do with codecs.

Most Mac programs aren't going to "trim" an existing file, although I believe QuickTime Player X does do this.

In most cases the editing software (like Resolve) will be expecting you to import a media file into a project, add portions of that media file to a timeline, and then export a new file, which you would then upload, rather than modifying the original file.
 
R

relatively_tasteless

New Member
maybe i need to elaborate more on the problem i am having: when trying to trim the .mp4 in quicktime, the trimming works (as in the preview in QT is trimmed), until i try to save it and quicktime tells me that it couldn't finish the process. In MPEG Streamclip, which has always been very reliable for me, i can actually save that file and MPEG Streamclip shows a smaller file size and length in the output, but when I open the output file (be it in finder, windows explorer or a web browser), it is at full length and file size again. I only face this issue with mp4 files generated by OBS – all these procedures for trimming work flawlessly with any other mp4 fiel from any other source, hence the reason why people suggested that obs' encoder might be damaged/corrupted on my machine.

So, what would you suggest me to do if I want to, say, cut the first 5 seconds of a screencapture from OBS?
 
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