[mythtv-users] Odd squishing of aspect ratio by mythtranscode

E. Westbrook mythtv-users at westbrook.com
Fri Jul 29 07:47:20 UTC 2011


Hello all,

I'm seeing "squished" video after transcoding and I wonder if it's pilot
error on my part or a bug.  Nothing jumped out at me when searching commits,
bugs, wiki, or google.

The facts:

   - MythTV BE/FE v0.25pre-2978-g8a913d1
   - This is a clean install, i.e. no previous MythTV database, directories,
   settings, or files were in place or restored when installed, which was done
   recently from a build from git master.
   - The machine is an i7-860, with a GT430 on VDPAU high quality settings,
   with a pcHDTV HD3000 and antenna for ATSC OTA.
   - The only change I made to the default transcoding profile was switching
   it from RTjpeg to MPEG-4 (with default settings).
   - Mythfrontend was used to edit a cutlist and invoke a default profile
   transcode.

Below are links to "dd" extracts of the video files, and a log extract.

Anything else needed can be cheerfully provided.

Thanks for any thoughts!
Eric

As recorded (.mpg.old)
Clip: http://westbrook.com/1021_20110728183000_trim.mpg (8MB)
[image: http://westbrook.com/20110729004037432050246a.png]

As transcoded (.nuv)
Clip:  http://westbrook.com/1021_20110728183000_trim.nuv (8MB)
[image: http://westbrook.com/20110729004054281259735a.png]


Section of mythbackend log around transcoding operation:

2011-07-29 00:11:01.595722 I  Managed child (PID: 355327) has exited!
command=/usr/bin/mythpreviewgen --size 0x0 --chanid 1021 --starttime
20110728183000 --verbose general,system --loglevel info --quiet, status=0,
result=0
2011-07-29 00:11:10.474274 I  JobQueue: Transcode Starting for TMZ:
Autodetect (3.3 GB)
2011-07-29 00:11:10.474871 I  Managed child (PID: 355376) has started! *
command=/usr/bin/mythtranscode -j 150 --profile autodetect --honorcutlist
--verbose general,system --loglevel info, timeout=0
2011-07-29 00:11:10.528020 I  Managed child (PID: 355379) has started! *
command=/usr/bin/mythpreviewgen --size 0x0 --chanid 1021 --starttime
20110728183000 --verbose general,system --loglevel info --quiet, timeout=30
2011-07-29 00:11:10.675990 C  mythtranscode version:
tree-42fbadb26fa00311ec35de7be116656a02bcc189 [v0.25pre-2963-g42fbadb-dirty]
www.mythtv.org
2011-07-29 00:11:10.676007 C  Enabled verbose msgs:  general system
2011-07-29 00:11:10.676019 C  Setting Log Level to LOG_INFO
2011-07-29 00:11:10.676056 I  Added logging to the console
2011-07-29 00:11:10.676061 I  Added database logging to table logging
2011-07-29 00:11:10.676099 C  Setting up SIGHUP handler
2011-07-29 00:11:10.676207 C  Using runtime prefix = /usr
2011-07-29 00:11:10.676218 C  Using configuration directory =
/home/eric/.mythtv
2011-07-29 00:11:10.767178 I  MainServer::ANN Monitor
2011-07-29 00:11:10.767184 I  adding: vs01eric as a client (events: 0)
2011-07-29 00:11:10.767781 I  MainServer::ANN Monitor
2011-07-29 00:11:10.767788 I  adding: vs01eric as a client (events: 1)
2011-07-29 00:11:10.683254 I  Using localhost value of vs01eric
2011-07-29 00:11:10.698072 I  Database connection created: DBManager0
2011-07-29 00:11:10.698090 I  New DB connection, total: 1
2011-07-29 00:11:10.700051 I  Connected to database 'mythconverg' at host:
mysql.lan.westbrook.com
2011-07-29 00:11:10.701940 I  Closing DB connection named 'DBManager0'
2011-07-29 00:11:10.702614 I  Connected to database 'mythconverg' at host:
mysql.lan.westbrook.com
2011-07-29 00:11:10.703520 I  Current locale en_US
2011-07-29 00:11:10.703590 E  Reading locale defaults from
/usr/share/mythtv//locales/en_us.xml
2011-07-29 00:11:10.709004 I  Loading en_us translation for module
mythfrontend
2011-07-29 00:11:10.729828 N  Transcoding from
/home/eric/mythtv/default/1021_20110728183000.mpg to
/home/eric/mythtv/default/1021_20110728183000.mpg.tmp
2011-07-29 00:11:10.776332 I  Database connection created: LogCon
2011-07-29 00:11:10.776350 I  New static DB connectionLogCon
2011-07-29 00:11:10.820592 I  MainServer::ANN Monitor
2011-07-29 00:11:10.820597 I  adding: vs01eric as a client (events: 0)
2011-07-29 00:11:10.821023 I  MainServer::ANN Monitor
2011-07-29 00:11:10.821029 I  adding: vs01eric as a client (events: 1)
2011-07-29 00:11:10.776923 I  Connected to database 'mythconverg' at host:
mysql.lan.westbrook.com
2011-07-29 00:11:10.790491 I  AFD: Opened codec 0xf4e3c0, id(MPEG2VIDEO)
type(Video)
2011-07-29 00:11:10.790505 I  AFD: codec AC3 has 6 channels
2011-07-29 00:11:10.790760 I  AFD: Opened codec 0xf4ea80, id(AC3)
type(Audio)
2011-07-29 00:11:10.790951 N  AudioPlayer: Enabling Audio
2011-07-29 00:11:10.809949 I  Honoring the cutlist while transcoding
2011-07-29 00:11:10.811648 I  Cutlist        : 0-1818,5714-111382
2011-07-29 00:11:10.811652 I  Original Length: 111382 frames
2011-07-29 00:11:10.811655 I  New Length     : 3896 frames
2011-07-29 00:11:10.812598 N  Transcode: Looking for autodetect profile:
Autodetect from 720p
2011-07-29 00:11:10.813223 I  Database connection created: DBManager1
2011-07-29 00:11:10.813231 I  New DB connection, total: 2
2011-07-29 00:11:10.813857 I  Connected to database 'mythconverg' at host:
mysql.lan.westbrook.com
2011-07-29 00:11:10.816232 I  Database connection created: DBManager2
2011-07-29 00:11:10.816242 I  New DB connection, total: 3
2011-07-29 00:11:10.816933 I  Connected to database 'mythconverg' at host:
mysql.lan.westbrook.com
2011-07-29 00:11:10.819851 I  MythCoreContext: Connecting to backend server:
mythbackend.lan.westbrook.com:6543 (try 1 of 1)
2011-07-29 00:11:10.820457 I  Using protocol version 69
2011-07-29 00:11:10.826489 E  SampleRate: Attempted to add a rate 32000 Hz,
which is not in the list of allowed rates.
2011-07-29 00:11:10.828994 N  Transcode: Using autodetect profile: MPEG2
2011-07-29 00:11:10.829064 W  RecBase(NULL:): SetOption(vbiformat,NTSC
Closed Caption): Option not recognized
2011-07-29 00:11:10.923591 I  Copying Audio while transcoding Video
2011-07-29 00:11:10.941002 I  AFD: Audio stream changed
2011-07-29 00:11:10.942670 I  Player(0): Fast-Forwarding from 0 to 1818
Error in my_thread_global_end(): 1 threads didn't exit
2011-07-29 00:11:19.018397 I  Managed child (PID: 355379) has exited!
command=/usr/bin/mythpreviewgen --size 0x0 --chanid 1021 --starttime
20110728183000 --verbose general,system --loglevel info --quiet, status=0,
result=0
2011-07-29 00:11:55.755933 I  Player(0): Fast-Forwarding from 5714 to 111382
2011-07-29 00:11:55.969979 N  Transcoding
/home/eric/mythtv/default/1021_20110728183000.mpg done
2011-07-29 00:11:55.970287 N  Transcode: delete old file: waiting while
program is in use.
2011-07-29 00:11:55.970888 N  Transcode: program is no longer in use.
2011-07-29 00:11:55.976796 N  Requesting delete for file 'myth://
Default at mythbackend.lan.westbrook.com:6543/1021_20110728183000.mpg.png'.
2011-07-29 00:11:55.981559 I  Waiting for threads to exit.
Error in my_thread_global_end(): 1 threads didn't exit
2011-07-29 00:12:02.166441 I  Managed child (PID: 355376) has exited!
command=/usr/bin/mythtranscode -j 150 --profile autodetect --honorcutlist
--verbose general,system --loglevel info, status=0, result=0
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