Keith,
thanks.
I am capturing Digital TV streaming mpeg2 data and decompressing to PC
displayer. and I found it diplays sawtooth.
As you say libmpeg2 dose not any de-interlace. so, In sample5(),
case STATE_INVALID_END:
if (info->display_fbuf)
save_pgm (sequence->width, sequence->height,
sequence->chroma_width, sequence->chroma_height,
info->display_fbuf->buf, framenum++);
if (info->discard_fbuf)
((struct fbuf_s *)info->discard_fbuf->id)->used = 0;
if (state != STATE_SLICE)
for (i = 0; i < 3; i++)
for (j = 0; j < 3; j++)
free (fbuf[i].mbuf[j]);
break;
Is "info->display_fbuf->buf" one field or one frame data (my mpeg2 source is
interlaced)?
If I want to do de-interlace before display , may I process
info->display_fbuf->buf directly?
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
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