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Although @stib's advice is sound, I disagree with "to get an appreciable size reduction you would have to throw away a lot of quality". Cameras have to compress on-the-fly, so they use constrained baseline mode, which is to say, they skip most of the tricks that H.264 codec uses to efficiently compress videos. If space isn't a pressing concern, keep them ...


Leave them as they are. If storage space is limited you could recompress them, but given that the files coming from the DSLR are already compressed, to get an appreciable size reduction you would have to throw away a lot of quality. As you're planning to edit them in the future - meaning another transcoding - this would be a last resort. Buy more hard ...


As you are hardcoding subtitles, the video (with the subtitles added) will be re-encoded. You can use the CRF rate control method to modulate the quality of the output. So, start with ffmpeg -i -vf -crf 18 -c:a copy If the quality's not acceptable, lower that value till it is - in exchange ...


It appears that the subtitles file did not have --> but a –> with the – corresponding to the en dash that was placed in the file, which was edited by hand externally. It seems like the en dash sign was assigned to typing -- in Mac TextEdit (the functionality can be disabled in preferences).


Add -r 25 to your command. The q readout refers to the allowed range for the quantizer. There's no bounds applied in your command, but you can limit by setting one or both of -qmin N and -qmax N Unless you have good reason to, don't change it.


Use this ffmpeg* command: ffmpeg -i "" -c:v copy "20151105-175532.mp4" *get 32-bit static build.

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