Use this method when you want to avoid a re-encode and your format does not support file-level concatenation (most files used by general users do not support file-level concatenation). ffmpeg -i opening.mkv -i episode.mkv -i ending.mkv \ If you want to avoid the re-encode, you could re-encode just the inputs that don't match so they share the same codec and other parameters, then use the concat demuxer to avoid re-encoding everything.
Note that this method performs a re-encode of all inputs. Use this method if your inputs do not have the same parameters (width, height, etc), or are not the same formats/codecs, or if you want to perform any filtering.
I ended up using mpg as the intermediate format and it worked (NOTE this is a dangerous example, -qscale 0 will re-encode the video.) ffmpeg -i 1.mp4 -qscale 0 1.mpgĬat 1.mpg 2.mpg | ffmpeg -f mpeg -i -qscale 0 -vcodec mpeg4 output.mp4įFmpeg has three concatenation methods: 1.
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