[mythtv-users] Transcoding SD MPEG2 to H.264---recommendations?

[Nick Rout]

On Wed, Dec 1, 2010 at 12:45 AM, James Courtier-Dutton
<james.dutton at gmail.com> wrote:
> On 30 November 2010 00:43, Nick Rout <nick.rout at gmail.com> wrote:
>> On Tue, Nov 30, 2010 at 1:37 PM, D. R. Newman
>> <d.r.newman at e-consultation.org> wrote:
>>> On 29/11/10 18:54, f-myth-users at media.mit.edu wrote:
>>>> I considered that, but c'mon.  It was just a normal PVR-250 recording
>>>> from an STB.  It plays just fine.  It seems unlikely that every other
>>>> frame (on average) has an error in it.
>>>
>>> It is unlikely to get that many errors. In my experience, ProjectX
>>> normally picks up half a dozen errors in a 30-min DTV programme recorded
>>> from a digital terrestrial (Freeview). Some of those errors were in the
>>> transmitted programme, some come from the reception.
>>>
>>> Most digital video players are written to tolerate lots of errors, but
>>> still keep on playing. Encoders are not. Indeed, I started passing
>>> everything through ProjectX when a particular version of Avidemux
>>> stopped on the first error it found.
>>>
>>> Dave Newman
>>
>> +1 for ProjectX. I often had problems with audio sync when transcoding
>> files with avidemux, but running through ProjectX first then avidemux
>> makes a good file very time.
>
> Yes, me too. Why is it that avidemux messes with the audio sync, even
> when I am using the "copy" options for audio and video?

it seems to happen when there is a glitch in the original, which can
be in any part of the transmission/recording process.

dvbcut seems to fix it too.