[mythtv-users] mythtranscode: am I doing something wrong, or is this a bug?

John Pilkington J.Pilk at tesco.net
Wed Jan 21 11:41:38 UTC 2009


Misty P wrote:
> John Pilkington wrote:
>> Misty P wrote:
>>
>>> vince at Mythtical:/var/log/mythtv$ ls -l
>>> /mythtv/videos/1051_20080808184500.nuv
>>> -rw-r--r-- 1 mythtv mythtv 28623644884 2008-09-01 07:56
>>> /mythtv/videos/1051_20080808184500.nuv
>>>
>>> And then I cranked over mythtranscode:
>>>
>>> mythtranscode --chanid 1051 --starttime 2008-08-08-18-30-00 --mpeg2
>>> --honorcutlist --showprogress -v important
>>>
>> Try --starttime 20080808184500
> 
> Hey!  That worked!  (...well, I was able to get farther, anyway.)
> 
>> and I'm not sure that --mpeg2 will work with this file
> 
> It didn't.  (Said no more queue slots, but whatever.)  I changed the 
> command line to:
> 
> 
> 
> mythtranscode --chanid 1051 --starttime 20080808184500 --profile 
> autodetect --honorcutlist --showprogress -v important
> 
> 
> And now it pukes identically to jobs fired off from the UI:
> 
> 2009-01-21 04:34:14.923 Using runtime prefix = /usr
> 2009-01-21 04:34:14.923 Empty LocalHostName.
> 2009-01-21 04:34:14.928 New DB connection, total: 1
> 2009-01-21 04:34:14.931 Closing DB connection named 'DBManager0'
> 2009-01-21 04:34:14.931 Enabled verbose msgs: important
> 2009-01-21 04:34:14.933 New DB connection, total: 2
> 2009-01-21 04:34:14.941 Using protocol version 40
> 2009-01-21 04:34:14.951 Found video height of 1088.  This is unusual and 
> more than likely the video is actually 1080 so mythtranscode will treat 
> it as such.
> 2009-01-21 04:34:14.951 Transcode: Looking for autodetect profile: 
> Autodetect from 1080i
> 2009-01-21 04:34:14.952 New DB connection, total: 3
> 2009-01-21 04:34:14.958 Transcode: Using autodetect profile: RTjpeg/MPEG4
> 2009-01-21 04:34:14.958 No video information found!
> 2009-01-21 04:34:14.958 Please ensure that recording profiles for the 
> transcoder are set
> 
> 
> Since it seemed to be complaining about a profile, just for giggles I 
> hit mythtranscode with "--profile 1" (whatever THAT profile is) but that 
> didn't change the symptoms.  (Still complains about no video information 
> found.)
> 
> 
> 
> Thanks so far...  Any more ideas?  I tried -v all, but all that gave me 
> was more information about the database calls instead of the video 
> problem. (...so I'm not bothering to echo that output here.)
>
You may get useful info about what is present from

ffmpeg  -i /mythtv/videos/1051_20080808184500.nuv

or something like

mplayer -vo null -ao null -aid 0 -frames 0 -v <filename>


One frequent problem with mythtranscode appears as 'one buffer is full 
and the other is empty', which often happens if one audio stream 
disappears: but this is with dvb-t and probably doesn't apply to your 
setup.  I preprocess almost all recordings to leave only the video and 
the main stereo channel, using mencoder, before using mythtranscode to 
apply a cutlist.  Others use Projectx or nuvexport.




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