[mythtv-users] Lossless Mythtranscode in 0.26

Anthony Giggins seven at seven.dorksville.net
Tue Oct 1 02:38:25 UTC 2013


On 1 October 2013 10:00, jlistspam <jlistspam at gmail.com> wrote:

>  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> 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> 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
>
>
> _______________________________________________
> mythtv-users mailing listmythtv-users at mythtv.orghttp://www.mythtv.org/mailman/listinfo/mythtv-users
>
>  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
>
>
> Those same issues are also occurring in 0.27

I'd hold on longer if I were you untill there is a patch released

Cheers,

Anthony
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