[mythtv-users] Lossless Mythtranscode in 0.26

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On 9/28/2013 11:53 AM, John Finlay wrote:
> On 9/28/2013 2:33 AM, Anthony Giggins wrote:
>> On 27 September 2013 19:03, John Finlay <finlay at moeraki.com 
>> <mailto:finlay at moeraki.com>> wrote:
>>
>>     On 9/15/2013 12:38 PM, George Nassas wrote:
>>
>>         On 2013-09-15, at 2:10 PM, John Finlay <finlay at moeraki.com
>>         <mailto:finlay at moeraki.com>> wrote:
>>
>>             I'm thinking of upgrading to 0.26 but I recall that there
>>             was an issue with lossless transcoding using
>>             Mythtranscode. Since this is a feature that I use I
>>             wanted to find if this was still a problem or should I
>>             wait for 0.27 where I hope the problem is fixed.
>>
>>         I do lossless transcoding all the time and it's reliable now.
>>         There is an issue where, when you cut the beginning of your
>>         recording, myth doesn't play its audio but I haven't checked
>>         if that's a bug in transcode or myth playback.
>>
>>         - George
>>
>>
>>     I upgraded to 0.27 and lossless transcoding completes but creates
>>     a file which seems to have damaged meta-information according to
>>     ffmpeg/avconv but not according to mythffmpeg. The original file
>>     gives the same info for both ffmpeg and mythffmpeg but after the
>>     lossless transcoding they produce different results for bitrate
>>     and duration. The transcoded file is playable within myth but vlc
>>     thinks it's much shorter. Handbrake processes the tanscoded file
>>     very slowly.
>>
>>     John
>>
>> I agree, initial testing of 0.27 seemed ok but further transcodes 
>> result in the same issues as 0.26 :(
>>
>> I had raised http://code.mythtv.org/trac/ticket/11593 but I thought 
>> it was fixed so it got closed I've asked this to be reopened perhaps 
>> add some further details.
>>
>>
> Yes that looks exactly like the problems I'm seeing where 
> post-processing of a lossless cut file fails or produces unusable 
> output.  I'm surprised that the metadata of the lossless cut file 
> seems broken when viewed using mediainfo or ffmpeg/avconv. It seems 
> that mythtranscode has a new format for mpeg-ps files that these other 
> programs don't know.
>
> John
>
>
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I would wait for .27 if you use mythtranscode a lot.  I have two 
problems when cutting commercials.  First is the one with the silence at 
the beginning.  Second is that about half of the resulting files then 
cause handbrake to fail on the encoding for the iPad.  Handbrake just 
hangs at the start.

I use the RPMFusion rpms.  I have been waiting for .27 to come out and 
see if the issues are fixed.  It has been a long year with .26 with all 
of the mythtranscode issues.

John
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