[FFmpeg-devel] [PATCH v3] lavc/rawdec: Use AV_PIX_FMT_PAL8 for 1-bit raw AVI video

Mats Peterson matsp888 at yahoo.com
Mon Jan 25 01:55:39 CET 2016

On 01/25/2016 01:54 AM, Mats Peterson wrote:
> On 01/25/2016 01:52 AM, Michael Niedermayer wrote:
>> On Mon, Jan 25, 2016 at 01:39:13AM +0100, Mats Peterson wrote:
>>> On 01/25/2016 01:31 AM, Mats Peterson wrote:
>>>> On 01/25/2016 01:30 AM, Mats Peterson wrote:
>>>>> Well, this one is still incorrect, since it doesn't cater for
>>>>> different
>>>>> strides.
>>>>> Mats
>>>> I would like you to focus on version 5 that I've both mailed to you and
>>>> posted here.
>>>> Mats
>>> And why did you omit the 8 bpp changes for AVI? That's what this
>>> patch (or version 5 rather) is about.
>> put bluntly, because iam not convinced that this is valid in AVI
>> IIUC you created a avi file with a palette and a blue entry and 1bpp
>> and then modified ffmpeg to display that with blue.
>> ok
>> but
>> is that correct, does microsofts player display that with blue too?
>> does the AVI spec say that 1bpp has a palette?
>> do unmodified avi files exist out in the wild that have 1bpp palettes?
>> if 1bpp in AVI is per spec and MS reference supposed to have a palette
>> then we should too and iam happy with the change otherwise we should
>> keep mono for avi
> Microsoft's player doesn't even play raw 1-bit video for some reason,
> but that's not our problem, is it? All the documentation on Microsoft's
> site on 1-bit video tells us that it's palettized and not simply black &
> white. 1, 4, and 8 bit modes, all of them use the palette, if any,
> following the BITMAPINFOHEAER. 2-bit mode isn't even official, but still
> exists in FFmpeg.
> Mats
> _______________________________________________



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