Le 28/05/2017 à 12:07, Constant Brouerius van Nidek a écrit :

Since I got a dashboard camera for use in my car I have got very long videos which I would like to split into smaller parts. What can opensuse offer me for such a job? And if I start editing, what are the programs of choice?

kdenlive

jdd

Constant Brouerius van Nidek wrote:

Since I got a dashboard camera for use in my car I have got very long videos which I would like to split into smaller parts. What can opensuse offer me for such a job? And if I start editing, what are the programs of choice?

As already mentioned, ffmpeg and kdenlive. Two comments on that:

You can use ffmpeg to split the long videos into chunks without re-encoding.

ffmpeg -i longvideo -ss <starttime> -to <endtime> -c copy partvideo

(times are hh:mm:ss). Makes handling them much easier.

For real cutting etc kdenlive, and there it helps to have it create low-res proxy versions of your movies that are used in the gui. This really makes work a LOT more comfortable. You can enable it in settings->kdenlive->Project Defaults.

Am 28.05.2017 um 12:07 schrieb Constant Brouerius van Nidek:

Since I got a dashboard camera for use in my car I have got very long videos which I would like to split into smaller parts. What can opensuse offer me for such a job? And if I start editing, what are the programs of choice?

Perhaps you should have look at “Openshot”. www.openshot.org

But this is a real video editor, so if you only want to split the files it’s a little bit to much overhead

by Peter

On Sunday, May 28, 2017 8:41:38 PM WIB Carl Hartung wrote:

On Sun, 28 May 2017 17:07:30 +0700

Constant Brouerius van Nidek wrote:

...

Since I got a dashboard camera for use in my car I have got very long videos which I would like to split into smaller parts. What can opensuse offer me for such a job? And if I start editing, what are the programs of choice?

Hi Constant,

We don't know the camera make & model or the recording format it uses. This would be very helpful to know because it affects the complexity of any recommendations. For example:

I've been playing with a high resolution (1080p) ~30 FPS camera that writes insanely large files in .mov format to an internal micro-SD card. It has a built-in feature which automatically (and seamlessly) splits the data stream into 5 minute 'chunks' as it is recording. The files it creates in this mode are ~580 MB every five minutes. When the micro-SD card fills up, it continues uninterrupted recording by overwriting existing files, beginning with the oldest files first.

To productively work with these large files, I learned that it helped a great deal to keep my "source", "target" and "system" disks isolated from one another to avoid device read/write contention.

I frequently used cli ffmpeg to transcode these files into .mpg / .mp4 formats - the output format was determined by my use case - to make them much smaller and more manageable.

cli ffmpeg is also convenient for exporting (transcoding) selected 'clips' by specifying the source 'start' and 'stop' times.

Other times - again, depending upon the use case - I used cli mpgtx ("an MPeG ToolboX") to split large files down into equal sized 'chunks' to make them easier to work.

In other words, I used a combination of tools and techniques to create and dump 'clips' into a source directory that I could use with whatever non-linear digital video editor I was experimenting with at the time. As for which editor I preferreed, Cinelerra is great but it has a fairly steep learning curve. I also liked kdenlive and openshot.

hth & regards,

Dear Carl,

Am still finding out the specifics of this gift but in the mean time I know that the picture format is .MOV. Have already reuced some videos to .mp4 for a smoother playing. Will now dive into editing. Thanks list for the help

On 05/28/2017 08:41 AM, Carl Hartung wrote:

in this mode are ~580 MB every five minutes. When the micro-SD card fills up, it continues uninterrupted recording by overwriting existing files, beginning with the oldest files first.

You have it good. The old raw uncompressed (digital-8) 'dv' format was 31 MB per-second (which I still use because my . Since it is a dashcam, the files are probably already on disk. If you want to cut from the command line, there is always ffmpeg (see: https://superuser.com/questions/458761/accurately-cut-video-files-from-comma...)

For GUI apps, see https://askubuntu.com/questions/56022/what-to-use-to-quickly-cut-audio-video

Personally, I've always like cinelerra, but making friends with it takes a little time (but for just chopping out video clips, it's pretty easy) kdenlive seems to be a popular favorite.

On 06/01/2017 06:46 AM, Carl Hartung wrote:

I've worked with 'raw' digital video data in .dv format many times since Cinelerra and kdenlive use it as their native file format. What I didn't recognize until just now was the digital-8 connection. :)

Oh yes... And I'm still lucky enough to have 2 of them. Fantastic 3-CCD cameras, that do 16:9 wide-screen, etc.. I'll use them until they die (or until I can't find a firewire port anymore -- which is getting damn hard to find) Luckily my new(used) laptop HP 8760w comes complete with firewire and all my servers have it.

Using 'dvgrab' from the command-line is a wonderful utility. It will locate the small silence created by pressing the 'Record-Standby' button and create separate clips of each video clip for you (with nice date-time prefix so all your clips are nicely ordered as well. Literally, I have a little script that will run and rewind the tapes, download the dv clips, create a log file of the clips with their associated date-time, then rewind the tape again at the end, eject it and wait for me to put in the new tape.

dvgrab is the swiss-army-knife for getting dv off tape over firewire :p