[Libav-user] errors while processing tiff streams with image2pipe
Carl Eugen Hoyos
cehoyos at ag.or.at
Mon May 6 20:11:09 CEST 2013
cyril apan <cyrilapan at ...> writes:
>>cyril apan <cyrilapan <at> ...> writes:
>> stream->codec->pix_fmt == AV_PIX_FMT_RGB24 instead of
>> being AV_PIX_FMT_RGBA.>Looks like RGB24 to me, why do you
>> think there is >transparency information?
> Open it with Photoshop CS v12.0.4, and it displays a
> checkered background.
Both ImageMagick and gimp are not seeing
the transparency either.
I am not saying Photoshop is wrong, but
I read it as "RGB" "8bit", so I don't know
where to find the additional information.
(It may be a Photoshop-specific tag and that
is what gimp's warnings indicate.)
>> Since you used "image2pipe" in the subject:
>> There is no tiff parser, so you cannot generally use
>> input format image2pipe with tiff images, but this is
>> unrelated to the samples.
>> (Patch welcome.)
> I'm not sure to understand. So, image2pipe shouldn't
> work with tiff files?
Not completely, no.
> So why I can still get something out from the
> 1st sample?
Possibly because you are only feeding one image?
The idea of image2pipe is usually to feed a
series of images to ffmpeg, a parser is needed
to find the beginning of the next image.
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