Re: Number of frames in animated GIF

Dear Olivier,

Actually if I do TImage *img = TImage::Open("anim.gif.N") with not existing frame N, them img->IsValid() return false (I'm wondering why "img" is not 0 after an unsuccessful "TImage::Open" :)). How to suppress the error report by the "TImage::Open"?

Regards,

Vassili

Olivier Couet wrote:
> With root you can write animated gi but you can read them.
> There is no way to retrieve the number of frames in a animated gif with
> a ROOT command.
>
>
> -----Original Message-----
> From: Vassili Maroussov
> Sent: Friday, February 29, 2008 5:41 PM
> To: Olivier Couet
> Cc: roottalk
> Subject: Re: [ROOT] Number of frames in animated GIF
>
> I'm generating (a lot of) GIFs with various number of frames in ROOT and
>
> I wanted to have a simple frame-by-frame viewer. Well, in a case if I
> call TImage::Open("anim.gif.N") with not existing frame N, how can I
> know that?
>
> Cheers,
>
> Vassili
>
> Olivier Couet wrote:
>
>> Hi,
>>
>> In principle you should know that when you build the animated gif.
>> Simply count them when you add them in the animation.
>> Is your animated gif build outside ROOT ?
>>
>> Cheers, olviier
>>
>> -----Original Message-----
>> From: owner-roottalk_at_root.cern.ch [mailto:owner-roottalk_at_root.cern.ch]
>> On Behalf Of Vassili Maroussov
>> Sent: Friday, February 29, 2008 5:21 PM
>> To: roottalk
>> Subject: [ROOT] Number of frames in animated GIF
>>
>> Dear ROOTers,
>>
>> How to get number of frames in an animated GIF? I didn't find in the
>> TSAImage a member function for that.
>>
>> Regards,
>>
>> Vassili
>>
>>
>>
>
>
Received on Fri Feb 29 2008 - 18:44:01 CET