Mailing List Archive: MythTV: Mythtvnz

avidemux2 and sound syncing

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scottn at ihug

Nov 15, 2007, 10:48 PM

Post #1 of 7 (1453 views)
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avidemux2 and sound syncing

Hello

I normally use avidemux2 to edit mpeg files but have an issue with the sound
going out of sync with the video. A google search shows that this is not
uncommon. So I was wondering - what do other people use to edit mpeg files?
Or is there a simple way to keep the video and audio in sync with avidemux?

Thanks
--
Regards
Scott Newton

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steven at openmedia

Nov 16, 2007, 12:06 AM

Post #2 of 7 (1383 views)
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Re: avidemux2 and sound syncing [In reply to]

Depends on the source of the video

1. IVTV captures might be off by 80-100 ms on the myPVR build when editing
with avidemux

2. If DVB TS streams then you need to use ProjectX to sort out the Audio sync

I use avidemux 2.x on IVTV captures quite a lot.

Steve

--------------------------------------------
Steven Ellis - Technical Director
OpenMedia Limited - The Home of myPVR
email - steven [at] openmedia
sales - sales [at] openmedia
support - support [at] openmedia
website - http://www.openmedia.co.nz

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nick.rout at gmail

Nov 16, 2007, 12:22 AM

Post #3 of 7 (1401 views)
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Re: avidemux2 and sound syncing [In reply to]

I agree, I both edit and demux with projectx, then encode with avidemux.

I saw a script on the man mythtv list recently which took a cutlist
generated by mythtv's editing system and then demux the file with
projectx and mux it together again to create a well synced ad free
file.

On Nov 16, 2007 9:06 PM, Steven Ellis <steven [at] openmedia> wrote:
>
> Depends on the source of the video
>
> 1. IVTV captures might be off by 80-100 ms on the myPVR build when editing
> with avidemux
>
> 2. If DVB TS streams then you need to use ProjectX to sort out the Audio sync
>
> I use avidemux 2.x on IVTV captures quite a lot.
>
> Steve
>
>
> --------------------------------------------
> Steven Ellis - Technical Director
> OpenMedia Limited - The Home of myPVR
> email - steven [at] openmedia
> sales - sales [at] openmedia
> support - support [at] openmedia
> website - http://www.openmedia.co.nz
>
>
> _______________________________________________
> mythtvnz mailing list
> mythtvnz [at] lists
> http://lists.ourshack.com/mailman/listinfo/mythtvnz
> Archives http://www.gossamer-threads.com/lists/mythtv/mythtvnz/
>

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steven at openmedia

Nov 16, 2007, 12:05 PM

Post #4 of 7 (1398 views)
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Re: avidemux2 and sound syncing [In reply to]

Nick Rout wrote:
> I agree, I both edit and demux with projectx, then encode with avidemux.
>
> I saw a script on the man mythtv list recently which took a cutlist
> generated by mythtv's editing system and then demux the file with
> projectx and mux it together again to create a well synced ad free
> file.
>
What I often do is edit out the adverts using MythTV and then re-render
using the lossless MPEG-2 transcoder. That will then produce an in sync
PS file.

Steve

> On Nov 16, 2007 9:06 PM, Steven Ellis <steven [at] openmedia> wrote:
>
>> Depends on the source of the video
>>
>> 1. IVTV captures might be off by 80-100 ms on the myPVR build when editing
>> with avidemux
>>
>> 2. If DVB TS streams then you need to use ProjectX to sort out the Audio sync
>>
>> I use avidemux 2.x on IVTV captures quite a lot.
>>
>> Steve
>>
>>
>> --------------------------------------------
>> Steven Ellis - Technical Director
>> OpenMedia Limited - The Home of myPVR
>> email - steven [at] openmedia
>> sales - sales [at] openmedia
>> support - support [at] openmedia
>> website - http://www.openmedia.co.nz
>>
>>
>> _______________________________________________
>> mythtvnz mailing list
>> mythtvnz [at] lists
>> http://lists.ourshack.com/mailman/listinfo/mythtvnz
>> Archives http://www.gossamer-threads.com/lists/mythtv/mythtvnz/
>>
>>
>
> _______________________________________________
> mythtvnz mailing list
> mythtvnz [at] lists
> http://lists.ourshack.com/mailman/listinfo/mythtvnz
> Archives http://www.gossamer-threads.com/lists/mythtv/mythtvnz/
>

--
Steven Ellis - Technical Director
OpenMedia Limited
email - steven [at] openmedia
sales - sales [at] openmedia
support - support [at] openmedia
website - http://www.openmedia.co.nz

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scottn at ihug

Nov 16, 2007, 8:09 PM

Post #5 of 7 (1377 views)
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Re: avidemux2 and sound syncing [In reply to]

On Saturday, 17 November 2007 09:05:47 Steven Ellis wrote:
> What I often do is edit out the adverts using MythTV and then re-render
> using the lossless MPEG-2 transcoder. That will then produce an in sync
> PS file.

How do you do that? MythArchive doesn't allow me to do any editing to the
file - just archive it to DVD. Or am I missing something really obvious?

Thanks
--
Regards
Scott Newton

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criggie at criggie

Nov 16, 2007, 8:34 PM

Post #6 of 7 (1373 views)
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Re: avidemux2 and sound syncing [In reply to]

Scott Newton wrote:
> On Saturday, 17 November 2007 09:05:47 Steven Ellis wrote:
>> What I often do is edit out the adverts using MythTV and then re-render
>> using the lossless MPEG-2 transcoder. That will then produce an in sync
>> PS file.
>
> How do you do that? MythArchive doesn't allow me to do any editing to the
> file - just archive it to DVD. Or am I missing something really obvious?

Try hitting E for Edit Cutlist when viewing a recording.

When your cutlist is correct, press X while viewing to transcode and cut
out all the blanked out bits.

--
Criggie

http://criggie.dyndns.org/

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scottn at ihug

Nov 22, 2007, 12:58 PM

Post #7 of 7 (1330 views)
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Re: avidemux2 and sound syncing [In reply to]

Hi

On Saturday, 17 November 2007 17:34:13 Criggie wrote:
> Try hitting E for Edit Cutlist when viewing a recording.
>
> When your cutlist is correct, press X while viewing to transcode and cut
> out all the blanked out bits.

Nope, this definitely doesn't work on my system. Now to try and figure out
why.

--
Regards
Scott Newton

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