[mythtv-users] slightly OT: Can dd not be used on mp4?

[Gary Buhrmaster]

On Sat, Sep 21, 2013 at 12:48 AM, Ian Evans <dheianevans at gmail.com> wrote:
...
> So is there any way to create a smaller file? Trying top figure out why .27
> mythcommflag can't create a seektable on this mp4 file I have but the
> original's too big.

Have no tried it personally, but something like the following should work:

ffmpeg -ss 00:00:00 -t 00:30:00 -i original_file.mp4 -acodec copy \
-vcodec copy smaller_file.mp4

(that presumes I have not mis-remembered the ffmpeg options)

Gary