[FFmpeg-user] unsupported marker error

[Carl Eugen Hoyos]

Moritz Barsnick <barsnick <at> gmx.net> writes:

> On Tue, Feb 23, 2016 at 06:02:51 +0000, Carl Eugen Hoyos wrote:
> > Tibi <toxy21 <at> gmail.com> writes:
> > > i can't provide my input file because it's too large, 76GB.
> > The first 6000 frames will hopefully correspond to a smaller file...

> This should work:
> $ ffmpeg -i video.mxf -c copy -frames:v 6000 shortened.mxf

NO!
This will just forward a (possible) bug in the demuxer.

Please see https://ffmpeg.org/bugreports.html for an 
explanation how to cut files.

> (I assume MXF is not a format which can be cut with "dd"?)

mov is the only format for which this can be slightly 
more difficult (it is still possible though).

Carl Eugen