Mailing List Archive: MythTV: Users

Transcoding Artifacts

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dan at kingdomsolutions

Aug 24, 2007, 3:16 AM

Post #1 of 2 (250 views)
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Transcoding Artifacts

Hi,

I'm a bit of a Myth-newbie, but I'm running svn revision 14267 and
having some mpeg compression style artifacts after transcoding to
MPEG4 (blips on the audio and random sections of the video
corrupting, like when your digital signal is not so good on Live TV).

When watching live tv or watching a recording without transcoding, it
looks fine.

Any ideas on how to debug/fix this?

Cheers,
Dan

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mtdean at thirdcontact

Aug 24, 2007, 6:12 AM

Post #2 of 2 (238 views)
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Re: Transcoding Artifacts [In reply to]

On 08/24/2007 06:16 AM, Dan Harper wrote:
> I'm a bit of a Myth-newbie, but I'm running svn revision 14267 and
> having some mpeg compression style artifacts after transcoding to
> MPEG4 (blips on the audio and random sections of the video
> corrupting, like when your digital signal is not so good on Live TV).
>
> When watching live tv or watching a recording without transcoding, it
> looks fine.
>
> Any ideas on how to debug/fix this?

Use a higher bitrate or better bitrate distribution for VBR (i.e. make
sure you always use a 2-pass encoding)

Mike
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