[Elphel-support] broken files from footage?

[Sebastian Pichelhofer]

movie2dng and elphel_dng do the conversion quite differently:
movie2dng is using the Adobe SDK functions (slower but probably more
accurate).
elphel_dng treats the files like TIFFs(DNG is based on TIFF - much faster
in the conversion but possible creating something that is not perfectly
compatible)
so its easily possible that the 2 programs produce different results and in
some cases extremely different results ;)

Regards Sebastian


On Mon, Nov 12, 2012 at 8:34 PM, flavio soares <qazav3.0 at gmail.com> wrote:

> That's quite odd! That's exactly how it's supposed to look like, how did
> you do that? I didn't know that you could actually use movie2dng for single
> JP4 files! That changes everything!
>
> This frame was from one of those 'broken' header mov sequences. I used
> your php script to break it into JP4 images, but when I tried using
> elphel_dng, the colors were shifted, as if inverted. I'll send you a
> printscreen when I get home.
>
> Oleg, I think you just saved me some footage! o.O  Thank you very much!
>
> As to movie2dng, I believe a 'for in in `ls *.jp4`; do movie2dng --dng $i;
> done' should work then...
>
>
>
> 2012/11/12 Oleg <support-list at support.elphel.com>
>
>> Hi, Flavio,
>>
>> What's seeming odd is that for some files, the dng seems 'out of
>>> colours'. Meaning, in this sequence for example, all the colors seem
>>> to have faded. And I notice this seems to be the case for some other
>>> sequences that presented some error... Any ideas what may be the
>>> cause?
>>>
>>
>> Here's what I got after converting (using movie2dng<http://wiki.elphel.com/index.php?title=Movie2dng>)
>> your image -
>> http://community.elphel.com/incoming/Videos/1351914544_546877.jpeg.
>> Don't know how it should look - so, could you also send/upload a "good"
>> jp4 from the same sequence - like 1 frame before or after that frame.
>>
>> First thing I'd check is the exif header. There's an online exif-reader -
>> http://regex.info/exif.cgi.
>>
>> Best regards,
>> Oleg Dzhimiev
>> Electronics Engineer
>> phone: +1 801 783 5555 x124
>> Elphel, Inc.
>>
>
>
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