[FFmpeg-devel] [PATCH v9] lavc/rawdec: Remove monowhite switching code for 1 bpp AVI without a palette

Mats Peterson matsp888 at yahoo.com
Sat Feb 13 11:44:38 CET 2016


On 02/13/2016 11:44 AM, Mats Peterson wrote:
> On 02/13/2016 11:40 AM, Mats Peterson wrote:
>> On 02/13/2016 11:39 AM, Paul B Mahol wrote:
>>> On 2/13/16, Mats Peterson <matsp888-at-yahoo.com at ffmpeg.org> wrote:
>>>> On 02/13/2016 11:28 AM, Mats Peterson wrote:
>>>>>>> Once again, how are we supposed to know how many colors the palette
>>>>>>> consists of at the end of avpkt->data?
>>>>>>
>>>>>> palette size = packet size - width*height
>>>>>>
>>>>>
>>>>> Nope. You have to take the stride in account as well, not just the
>>>>> width
>>>>> and height, and it varies in nut, depending on whether you use
>>>>> "-vcodec
>>>>> copy" or "-vcodec rawvideo".
>>>>>
>>>>> Mats
>>>>>
>>>>
>>>> And you'll have to calculate the stride by subtracting the palette size
>>>> from the packet size, then divide by the height.
>>>
>>> Nope, pixels outside of width x height are ignored.
>>> _______________________________________________
>>
>> I need the stride for the alignment to 16 bytes. It's not done for fun.
>>
>> Mats
>>
>
> And pixels outside of the width are still in the packet, that's what's
> called the stride.
>
> Mats
>


Not pixels, but bytes.



More information about the ffmpeg-devel mailing list