[FFmpeg-user] Splicing together videos with different characteristics

[paul yurt]

On Nov 26, 2017 11:32 AM, "Full Name" <nuncestbibendum at excite.com> wrote:

I have a series of videos of my daughter giving piano recitals over the
years. The videos start when she was very little, playing with a single
finger, till now, that she can play the piano with high proficiency. I
would like to splice them together into a single video.

The problem is that the first few videos were obtained with an older
camcorder, that could do 640x480 resolution, whereas the later ones were
captured with a newer camcorder, able to do 1920x1080 resolution. At some
point I used a combination of HandBrake and ffmpeg to splice them together,
but with incomplete success, in that the aspect ratio of the 1920x1080
videos was modified to match that of the 640x480 ones. The end result was,
of course, very unsatisfactory.

I was wondering if ffmpeg might allow me to obtain better results. Is at
all possible, with ffmpeg, to splice such videos together, so that the
correct aspect ration is maintained for all the portions in the final
video? I would have thought that the answer is 'no', but my knowledge of
these things is very shallow.

More in general, what I would like from experts in this forum is advice on
how to splice together the videos above, in order to get the best results,
using ffmpeg.


I would do it in two passes  1) convert them to a single format and then
2)  join the new files together.

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