[mythtv-users] Transcode failing, in two different ways

jk90090 jk90090 at gmail.com
Wed Apr 11 02:48:34 UTC 2012 

Mythtranscode is failing to convert my recordings to MPEG4 with MP3 audio.

Recording Profiles ->  Transcoders ->  Medium Quality -
  Resize video while transcoding, AutoDetect x 480, MPEG4, 2200 Bitrate,
  Max Qual 2, Min Qual 15, Max qual diff between frames 3,
  Scale bitrate for frame size, Enable High-quality encoding, Enable 4MV encoding;
  MP3 audio, 32000 sampling rate, qual 7, volume 100%


# mythtranscode  --verbose all --loglevel debug --starttime 
20120322200000 --chanid 1071 -v --profile 28

    2012-04-10 14:08:39.788373 I  mythtranscode: 67% Completed @ 106.57 fps.
    2012-04-10 14:08:58.916929 E  decoding error
                 eno: Input/output error (5)

Another run:

    2012-04-10 15:20:19.022234 I  mythtranscode: 64% Completed @ 106.382
    fps.
    2012-04-10 15:20:39.028761 I  mythtranscode: 65% Completed @ 106.476
    fps.
    2012-04-10 15:20:59.036421 I  mythtranscode: 66% Completed @ 106.36 fps.
    2012-04-10 15:21:19.041453 I  mythtranscode: 67% Completed @ 106.31 fps.
    2012-04-10 15:21:39.051439 I  mythtranscode: 68% Completed @ 106.369
    fps.
    2012-04-10 15:21:41.508845 E  decoding error
                 eno: Input/output error (5)
    2012-04-10 15:21:41.794182 N  Transcoding
    /mythtv/recordings/1071_20120322200000.mpg done
    2012-04-10 15:21:41.794195 I  Waiting for threads to exit.
    Error: Not all threads were shut down properly:
    Thread TFWSync is still running
    Thread TFWWrite is still running


I've tried it three times now, directly on the backend server, and it 
fails at different points for the same recording.  I also tried another 
recording, same results.

    2012-04-10 17:38:56.742003 I  mythtranscode: 94% Completed @ 103.611
    fps.
    2012-04-10 17:39:16.752185 I  mythtranscode: 96% Completed @ 103.759
    fps.
    2012-04-10 17:39:36.756271 I  mythtranscode: 97% Completed @ 103.813
    fps.
    2012-04-10 17:39:56.763152 I  mythtranscode: 99% Completed @ 103.709
    fps.
    2012-04-10 17:40:06.305164 E  decoding error
                 eno: Input/output error (5)
    2012-04-10 17:40:06.947749 N  Transcoding
    /mythtv/recordings/1071_20120329200000.mpg done
    2012-04-10 17:40:06.947764 I  Waiting for threads to exit.
    Error: Not all threads were shut down properly:
    Thread TFWWrite is still running
    Thread TFWSync is still running


Then run #2:

012-04-10 18:05:55.484874 I  mythtranscode: 67% Completed @ 106.217 fps.
2012-04-10 18:06:15.493279 I  mythtranscode: 68% Completed @ 106.242 fps.
2012-04-10 18:06:35.495191 I  mythtranscode: 68% Completed @ 106.132 fps.
2012-04-10 18:06:53.238329 E  decoding error
             eno: Input/output error (5)
2012-04-10 18:06:53.485644 N  Transcoding 
/mythtv/recordings/1071_20120329200000.mpg done
2012-04-10 18:06:53.485662 I  Waiting for threads to exit.
Error: Not all threads were shut down properly:
Thread TFWWrite is still running
Thread TFWSync is still running

# dd if=/mythtv/recordings/1071_20120329200000.mpg of=/dev/null bs=64K
71531+1 records in
71531+1 records out
4687919308 bytes (4.7 GB) copied, 20.8832 s, 224 MB/s


Running Gentoo, commit media-tv/mythtv-0.25_rc20120329 based on the 
official ebuild from github.
Recordings come from QAM recordings via HDHomeRun.

Also, if I don't use the '--profile 28', it never even starts the transcode, and instead just segmentation faults:

# mythtranscode  -v all --loglevel debug --starttime 20120322200000 --chanid 1071
2012-04-10 10:21:56.161868 C  mythtranscode version: master [v0.25-beta-158-g9c4e7fd] www.mythtv.org
2012-04-10 10:21:56.161894 N  Enabled verbose msgs: all
2012-04-10 10:21:56.161920 N  Setting Log Level to LOG_DEBUG
2012-04-10 10:21:56.161959 I  Added logging to the console
2012-04-10 10:21:56.161965 I  Added database logging to table logging
2012-04-10 10:21:56.162034 N  Setting up SIGHUP handler
2012-04-10 10:21:56.162209 N  Using runtime prefix = /usr
2012-04-10 10:21:56.162254 N  Using configuration directory = /home/mythtv/.mythtv
2012-04-10 10:21:56.162336 E  (old)Settings::ReadSettings(settings.txt) - No such file settings.txt
Segmentation fault
  

# dmesg |tail
[1991045.073703] mythtranscode[11887]: segfault at 70 ip 00007fa0b0db6a69 sp 00007fff21944910 error 4 in libmythtv-0.25.so.0.25.0[7fa0b0756000+8f6000]
[1992322.143422] mythtranscode[12013]: segfault at 70 ip 00007f7d33767a69 sp 00007fff9706b800 error 4 in libmythtv-0.25.so.0.25.0[7f7d33107000+8f6000]
[1992350.412732] mythtranscode[12017]: segfault at 70 ip 00007fb87280ca69 sp 00007fffc2f19170 error 4 in libmythtv-0.25.so.0.25.0[7fb8721ac000+8f6000]
[1994299.586504] mythtranscode[12143]: segfault at 70 ip 00007f17e5031a69 sp 00007fffec41c6f0 error 4 in libmythtv-0.25.so.0.25.0[7f17e49d1000+8f6000]
[1994509.665568] mythtranscode[12164]: segfault at 70 ip 00007f96bd217a69 sp 00007fff8373df30 error 4 in libmythtv-0.25.so.0.25.0[7f96bcbb7000+8f6000]

No disks errors (mirrored drive set for my recordings partition), no errors in my /var/log/messages nor dmesg (other than the segfault directly above).

For the life of me, I can't get the debug symbols installed:

	USE="debug"&&  FEATURES="splitdebug"&&  emerge --oneshot =media-tv/mythtv-0.25_rc20120329

And yet still, running gdb, then 'file /usr/bin/mythtranscode' still results with "Reading symbols from /usr/bin/mythtranscode...(no debugging symbols found)...done."

2012-04-10 18:47:54.769848 E  SampleRate: Attempted to add a rate 32000 Hz, which is not in the list of allowed rates.
[New Thread 0x7fffdf7fe700 (LWP 20617)]
[New Thread 0x7fffdeffd700 (LWP 20618)]
[New Thread 0x7fffdc304700 (LWP 20619)]
[New Thread 0x7fffdbb03700 (LWP 20620)]
[Thread 0x7fffe75da700 (LWP 20614) exited]
2012-04-10 19:11:12.388511 E  decoding error
			eno: Input/output error (5)
[Thread 0x7fffdbb03700 (LWP 20620) exited]
[Thread 0x7fffdffff700 (LWP 20616) exited]
[Thread 0x7fffe85d2700 (LWP 20610) exited]
[Thread 0x7fffe8dd3700 (LWP 20609) exited]
Error: Not all threads were shut down properly: [Thread 0x7fffdc304700 (LWP 20619) exited]

Thread TFWWrite is still running
Thread TFWSync is still running

[Thread 0x7fffdf7fe700 (LWP 20617) exited]
[Thread 0x7fffdeffd700 (LWP 20618) exited]
[Inferior 1 (process 20608) exited normally]

Not very helpful, I know.

So, how best to start debugging these two failures?  Debugging on mythbackend isn't producing anything useful, and clearly the above excerpts aren't producing much detail either.


-JK

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