Hello,
what I came up with is something like this:
ffmpeg -f concat safe 0 -i movlist.txt -codec copy output.mp4
here movlist has entries like:
file '../07-04-2019/2019_0704_133725_071.MOV'
I had a dozen or so entries.
(after that I turned it into a timelapsed movie using something like:
ffmpeg -i sf2la.mp4 -filter:v "setpts=0.5*PTS" -an output.mp4
thanks,
Ron
On 7/5/19 12:34 AM, Stéphane Chauveau wrote:
I was wondering the same things a few days ago and a simple solution
seems to be the concat filter.
https://ffmpeg.org/ffmpeg-filters.html#concat
A simple example that works fine for me for inputs of the same size
and no audio is:
ffmpeg \
-ss 00:00 -t 4 -i input1.mp4 \
-ss 00:06 -t 5 -i input2.mp4 \
-ss 01:00 -t 3 -i input3.mp4 \
-filter_complex 'concat=n=3:v=1:a=0' \
-an output.mp4
Each of the -ss and -t specifies the start and the duration of the
next input. You can remove them if you want the full videos but short
durations are very convenient while experimenting.
The value n=3 passed to the concat filter should match the number of
inputs.Be careful, ffmpeg will complain if n is too large but it will
silently ignore some videos if n is too small.
That method requires that the videos are re-encoded so you may want to
add a few options to control the encoding quality.
On 7/5/19 2:28 AM, R C wrote:
Hello,
I would like to combine a bunch of movies (a dozen or so short ones)
to one long movie.
The short movies are from a dashcam, here is some info;
container: Quicktime
dimensions: 1920x1080
Codec: H.264
Framerate: 30 frames per second
Bitrate: varies per file ...
Audio doesn't matter much, there should be no audio
I tried a few ffmpeg options, tried to find examples online.
Any suggestions?
thanks,
Ron
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