hi,
I receive mpeg2 data, but it seems strange:
Structure of very picture is FRAME, I think frame picture need not do
de-interlace.
but when the stream playing, there is some sawtooth, so it need do de-interlace.
Frame picture need do de-interlace also?
======= 2007-05-10 13:54:28 您在来信中写道：=======
>hi ,
>
>how to realize de-interlace in libmpeg2?
>
>which varibles and where can I process de-interlacing(put two fiels into one
>frame)?
>
>best,
>
>allison
>
>
>
>>Allison,
>>
>>On Wed, 9 May 2007, hdzhne wrote:
>>
>>> Is "info->display_fbuf->buf" one field or one frame data (my mpeg2
>>> source is interlaced)?
>>
>>I think it's always a frame. (Not 100% sure in the case of field pictures,
>>but nobody seems to use those. I think it's still a frame even when field
>>pictures are used, in any event.)
>
>If buf[] is always a frame, we need not do any de-interlace.
>>
>>> If I want to do de-interlace before display , may I process
>>> info->display_fbuf->buf directly?
>>
>>Sure. Keep in mind that buf[] is an array of three framebuffers -- Y, Cb,
>>and Cr -- and those will be different sizes. E.g. Y could be 1280x720 and
>>Cb and Cr will be 640x360.
>
>I just display buf[] (convert YUV to RGB) on PC displayer, and can see
>sawtooth clear. so I think I need do de-interlace.
>
>
>So, I am still not sure whether de-interlace should be done about
>diplay_fbuf->buf[] or not.
>
>>
>>Cheers,
>>Keith
>>
>>> Best,
>>>
>>> allison
>>>
>>>
>>>
>>> ======= 2007-05-08 13:09:18 ：=======
>>>
>>>> Allison,
>>>>
>>>> I don't understand exactly what you mean by "SD DV mpeg2 data". DV (aka,
>>>> MiniDV) is a different format that does not use MPEG-2.
>>>>
>>>> Assuming you're just referring to interlaced content, there is no perfect
>>>> way to display interlaced material on a progressive display like a
>>>> computer monitor.
>>>>
>>>> Some deinterlacing techniques include "bobbing" (meaning doubling each
>>>> line in a field) and "weaving" (meaning displaying each frame as a unit,
>>>> with separate fields woven together).
>>>>
>>>> libmpeg2 does not implement any deinterlacing techniques. It _only_
>>>> performs the MPEG-2 decoding process. The display process is up to the
>>>> application that harnesses libmpeg2.
>>>>
>>>> Some of the applications that can use libmpeg2, and do implement various
>>>> deinterlacing methods, include mplayer, xine, and vlc. If you want
>>>> good-looking results, you should either implement deinterlacing or use one
>>>> of those applications. libmpeg2 does not do this.
>>>>
>>>> Best regards,
>>>> Keith
>>>>
>>>> On Tue, 8 May 2007, hdzhne wrote:
>>>>
>>>>> hi,
>>>>>
>>>>> When I use mpeg2lib to decoder SD DV data, I can see sawtooth clear
>>>>> when there is quick moving in picture.
>>>>>
>>>>> I think it because just deinterlacing is too slow or meet some wrong. PC
>>>>> I used is high performance PC, and can decoder SD DV mpeg2 data about
>>>>> more than 30fps.
>>>>>
>>>>>
>>>>>
>>>>> hdzhne
>>>>> [EMAIL PROTECTED]
>>>>> 2007-05-08
>>>>>
>>>>>
>>>
>>> = = = = = = = = = = = = = = = = = = = =
>>>
>>>
>>> 致
>>> 礼！
>>>
>>>
>>> hdzhne
>>> [EMAIL PROTECTED]
>>> 2007-05-09
>>>
>>>
>
>= = = = = = = = = = = = = = = = = = = =
>
>
> 致
>礼！
>
>
> hdzhne
>[EMAIL PROTECTED]
> 2007-05-09
>
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致
礼！
hdzhne
[EMAIL PROTECTED]
2007-05-14
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