[mythtv] Ticket #12303: mythtranscode destroys audio

[Karl Dietz]

On 15.11.2014 13:52, John Pilkington wrote:
> On 15/11/14 11:48, Raymond Wagner wrote:
>> On 11/14/2014 7:25 AM, John Pilkington wrote:
>>> On 14/11/14 12:26, MythTV" wrote:
>>>> #12303: mythtranscode destroys audio
>>>
>>>> Would it help to have the two files?
>>>> 34M before.mpg
>>>> 76M after.nuv
>>>>
>>> It's unlikely to do any harm to put them in a drop-box somewhere...
>>> ... but isn't this supposed to be about compression?
>>
>> If you want to actually perform recompression of your files, instead of
>> simply performing a lossless cut of MPEG2 recordings, you shouldn't use
>> mythtranscode. You seem to be recompressing to RTJPEG for some reason,
>> but even properly configured, mythtranscode is limited to MPEG4ASP,
>> which is only a modest increase in compressibility over MPEG2, and
>> you're stuck in a NUV container.
>
> Yes. I started to add a new comment to the ticket, but decided not to.
> It isn't clear _why_ either of the two? people with the problem wish to
> transcode, but it's my feeling that most of the transcode options now
> offered in mythtvsetup are outdated. Browsing the wiki for 'scripts' or
> 'user jobs' is more likely to dig up something useful, although it might
> not be up to date.

Maybe we should change the default to lossless transcode instead of
RTJPEG/NUV for 0.28? I didn't find a guide on our wiki on enabling the
lossless transcoding profile.

Regards,
Karl