[FFmpeg-devel] Vertical bands with RT21 (Intel Real Time Video 2.1) codec

Mats Peterson matsp888 at yahoo.com
Sat Dec 19 04:03:25 CET 2015


On 12/19/2015 04:01 AM, Mats Peterson wrote:
> On 12/18/2015 01:22 PM, Mats Peterson wrote:
>> On 12/18/2015 05:32 AM, Mats Peterson wrote:
>>> On 12/18/2015 05:12 AM, Mats Peterson wrote:
>>>> On 12/18/2015 04:13 AM, Mats Peterson wrote:
>>>>> Samples: https://drive.google.com/open?id=0B3_pEBoLs0faei1Sd1h6SG11QlE
>>>>>
>>>>> Mats
>>>>>
>>>>
>>>> The clips are sample clips from Video for Windows, in case anyone
>>>> wonders. I haven't created them myself.
>>>>
>>>> Mats
>>>>
>>>
>>> The output is generally washed-out, as well, apart from the bands.
>>>
>>> Mats
>>>
>>
>> I noticed this issue has been discussed as far back as in 2005 (see
>> http://sourceforge.net/p/ffmpeg/bugs/310/), but using the slightly
>> different terms "ghosting and shadow effects". In any case, it obviously
>> still hasn't been fixed.
>>
>> Mats
>>
>
> Sorry, Paul, I accidentally removed your reply. Anyway, as an answer to
> your question regarding whether I know software that plays/decodes the
> videos correctly, yes, the IR21 codec in Windows 3.1. Support for RT21
> was unfortunately dropped in later versions of Windows, as far as I
> know. And thanks, Piotr Bandursky, for providing the raw output from
> ir21.dll. That's the way it should look.
>
> Mats
>

Bandurski, sorry.

-- 
Mats Peterson
http://matsp888.no-ip.org/~mats/


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