[FFmpeg-devel] [PATCH] Fix non-rounding up to next 16-bit aligned bug in IFF decoder

Måns Rullgård mans
Mon May 3 17:28:40 CEST 2010

Sebastian Vater <cdgs.basty at googlemail.com> writes:

> M?ns Rullg?rd a ?crit :
>> Sebastian Vater <cdgs.basty at googlemail.com> writes:
>>> Just tested on PowerPC big-endian machine:
>>> Converting to BMP and gwenviewing the BMP worked fine.
>> That's not how you test decoders.  The correct way is to do something
>> like this:
>> $ ./ffmpeg -i input -f rawvideo - | md5sum
>> If the md5sum changes, there's an error somewhere.  A small error will
>> not be obvious through visual inspection only.
> I did that both with:
> $ ./ffmpeg -i input -f rawvideo - | md5sum
> and with:
> $ ./ffmpeg -i input - | md5sum
> If I ommit rawvideo, the two md5sum's match on be/le...

That doesn't work here.

> When I use rawvideo, they differ only in the palette data at the end.
> The palette data is written as ARGB on a be CPU and BGRA on le CPU.

You could specify an endian-independent pixel format with -pix_fmt.

M?ns Rullg?rd
mans at mansr.com

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