On Fri, May 13, 2011 at 03:47:47PM +0530, Aditya Game Programmer wrote:
> [mpeg @ 19140050] max_analyze_duration reached      //-- what causes
> this and how do i prevent this?

does plain ffmpeg also produce this warning ?
and you can tune the max_analyze_duration parameter in AVFormatContext


> 
> Input #0, mpeg, from 'tv5.mpg':
>   Duration: 00:02:58.72, start: 0.500000, bitrate: 4162 kb/s
>     Stream #0.0[0x1c0]: Audio: mp2, 48000 Hz, stereo, s16, 64 kb/s
>     Stream #0.1[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [PAR 16:15 
> DA
> R 4:3], 15000 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
> Output #0, avi, to 'output.avi':
>     Stream #0.0: Audio: mp2, 48000 Hz, 2 channels, 64 kb/s
>     Stream #0.1: Video: mpeg4, yuv420p, 720x576 [PAR 16:15 DAR 4:3], q=2-31, 
> 150
> 00 kb/s, 90k tbn, 50 tbc
> 
> [mpeg2video @ 1915FE30] ac-tex damaged at 33 22 //--what is ac-tex?

its AC coefficient errors in texture that is 8x8 dct coding.
if your stream is not damaged or truncated theres something wrong with
what is input to the decoder


> how to prevent damage or correct the damaged ac-tex ?
> prevent its damage
> [mpeg2video @ 1915FE30] Warning MVs not available //-- what are mv's  ?

Motion Vectors


> [mpeg2video @ 1915FE30] concealing 90 DC, 90 AC, 90 MV errors //--
> what exactly is happening here ?

As above, its some problem with the data that is feed to
avcodec_decode_video*()

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

No great genius has ever existed without some touch of madness. -- Aristotle

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