[FFmpeg-user] Extract images from concatenate .VOB

[Etienne Desautels]

On 2015-09-12, at 05:45, Nicolas George wrote:

> Le quintidi 25 fructidor, an CCXXIII, Etienne Desautels a écrit :
>> I'm trying to extract images (frames) from some DVD. For this I think I
>> need to concatenate multiple .VOB (like VTS_01_1.VOB, VTS_01_2.VOB) to be
>> able to extract images that are in the second, third, etc. VOB.
> 
> This is a common misconception. DVD structure is more complex than just a
> video stream split into several files. The VOB components are divided into
> cells, with possibly cells out of order or menus intermixed and very
> probably timestamp resets. All this is held together by the extra files,
> especially the IFO files.
> 
> FFmpeg can not read the IFO files itself, but it contains a script in the
> tools directory that can generate a merging script: see tools/dvd2concat.



Nicolas,

I just found the '-safe' option. Looks like everything works fine now. You can forgot my previous message.

Thanks for your work.

Etienne