Splitting a video into multiple parts

Question

I try to install a software for a thermal camera, but it gives the error message:

    pi@raspberrypi:~ $ sudo dpkg -i /media/pi/PETI/libirimager-1.1.7-i386.deb
Selecting previously unselected package libirimager.
(Reading database ... 112361 files and directories currently installed.)
Preparing to unpack .../libirimager-1.1.7-i386.deb ...
Unpacking libirimager (1.1.7) ...
dpkg: dependency problems prevent configuration of libirimager:
 libirimager depends on libudev-dev (>= 1.0).
 libirimager depends on gcc (>= 4.6).
 libirimager depends on build-essential (>= 1.14.18).
 libirimager depends on cmake (>= 2.6).

dpkg: error processing package libirimager (--install):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 libirimager

I tried the dpkg --configure -a , but did not solve the problem. The linux is totaly new for me, so I am unfamiliar with these orders. (Raspbian Jessie, i386)

Solution 1

Here is a solution that worked for me.

For example:

avconv -ss 0 -i x.mp4 -t 180  -vcodec copy -acodec copy -metadata track="1" "Part I.mp4"              
avconv -ss 180 -i x.mp4 -t 164  -vcodec copy -acodec copy -metadata track="2" "Part II.mp4"              
avconv -ss 344 -i x.mp4 -t 185  -vcodec copy -acodec copy -metadata track="3" "Part III.mp4"   

I had 50 entries and I put them in a script together. I first put skeletons like

avconv -ss  -i x.mp4 -t   -vcodec copy -acodec copy -metadata track="  " ".mp4"  

Then I filled out the -ss and put the titles. After that, I used libreoffice Calc with space as a delimiter. I got the values for -t and track with a formula and dragging.

Solution 2

If you do this often you can try to create a bash script. Start with something like this:

#!/bin/bash

SAVEIFS=$IFS
IFS=$(echo -en "\n\b")

FILES=$(ls *.mp4|sort)

let START=0

for FILE in $FILES
do
    echo Processing $FILE
    mkdir "${FILE}-chop"
    for COUNT in {1..59}
    do
        exec avconv -i "${FILE}" -ss $START -t 60 -c:v copy -c:a copy "./${FILE}-chop/${COUNT} - ${FILE}"
        let START=$START+60
    done
done

IFS=$SAVEIFS

Keep in mind that it's a very ugly code, and it will probably produce many errors and empty files, and won't work properly if the input file is more than an hour long, but it'll get you started.

Comments

[Tasos]

You can use command line --- ffmpeg -i input.mpg -ss 00:00:10 -t 00:00:30 out1.mpg -ss is the start point in hh:mm:ss from the beginning of your video file --- superuser.com/questions/31135/…

[Tasos]

If you want to just split the video without re-ecoding it, use the copy codec for audio and video. Try this: ----- ffmpeg -ss 00:00:00 -t 00:50:00 -i largefile.mp4 -acodec copy \ -vcodec copy smallfile.mp4

[Tasos]

can you check this solution, if you are familiar with scripts there is a nice script down the bottom yo can try --- stackoverflow.com/questions/5651654/…

[romanbird]

Yes, I know about it. I need to split a video of an opera into scenes/acts, etc.

[Tasos]

well you can try this --- ffmpeg -i in.mp4 -ss [start] -t [duration] -c:v copy -c:a copy out.mp4 --- source superuser.com/questions/377343/…

[romanbird]

This is better. Thanks. When I chain two outputs together the second one is frozen for the first few seconds.

[Tasos]

i believe i read somewhere but im not sure were, that you could also do multiple cuts in one command rather than doing it once every time. Cant remember though

[romanbird]

ya, thats what I did but the second one freezes for a few seconds: ffmpeg -i x.mp4 -ss 00:00:00 -t 00:00:50 -c:v copy -c:a copy out.mp4 -ss 00:00:49 -t 00:02:00 -c:v copy -c:a copy out1.mp4

[Barafu Albino]

I believe that using copy codec one can only split videos on i-frames, which can be as rare as once per scene.

[romanbird]

what should I use then?

[Péter Kertész]

Thank you for the fast answer. Now it is better, but I have still a message: 'This package is uninstallable' 'Dependency is not satisfiable: libudev-dev (>= 1.0)

[Péter Kertész]

How can I install all dependencies? Are they independent files? I'm sorry for the silly questions...

[tso]

apt install libudev-dev gcc build-essential cmake

[Knud Larsen]

Please edit your question to include OS name, version, architecture. This command will reply with i686 or x86_64 : uname -m

[Toby Speight]

The question is not on-topic for Stack Overflow as defined in the help center. Please don't answer such questions; instead, you should flag them for attention and they will be closed or migrated appropriately.

[Knud Larsen]

libudev-dev, Jessie : libudev-dev_215-17 ... seems to be "later than 1.0". packages.debian.org/jessie/libudev-dev >>> arm64 packages.debian.org/jessie/arm64/libudev-dev/download