[libav-bugs] [Bug 775] New: Unknown entry error does not allow for concatenation of Webm file

bugzilla at aruru.libav.org bugzilla at aruru.libav.org
Sun Nov 9 08:31:20 CET 2014


            Bug ID: 775
           Summary: Unknown entry error does not allow for concatenation
                    of Webm file
           Product: Libav
           Version: git HEAD
          Hardware: IA64
                OS: Linux
            Status: NEW
          Severity: blocker
          Priority: ---
         Component: general
          Assignee: bugzilla at libav.org
          Reporter: volodya at Whengendarmesleeps.org

I am attempting to concatenate the WEBM file to itself and output the Matroska
The command line is:
avconv -i concat:01.webm\|01.webm -c:a libvorbis -c:v libtheora while.mkv

The expected length of the matroska file is twice that of the webm file,
however, the file is only processed once, and at the end of the processing i
get the error:
Unknown entry 0x1A45DFA30
[matroska,webm @ 0x29b9080] Unknown entry 0x18538067

If i attempt to concatenate the file three or more times the error is repeated
with different entry numbers as so
[matroska,webm @ 0x247e080] Unknown entry 0x18538067
[matroska,webm @ 0x247e080] Unknown entry 0x1A45DFA3
[matroska,webm @ 0x247e080] Unknown entry 0x18538067
[matroska,webm @ 0x247e080] Unknown entry 0x1A45DFA3
[matroska,webm @ 0x247e080] Unknown entry 0x18538067

I have uploaded the samples to the 'concat_sample' on the FTP server.

I can reencode with
avconv -i concat:01.webm -c:a libvorbis -c:v libtheora while.mkv
with absolutely no problems, no errors, no warnings.

$ gdb avconv 
GNU gdb (Ubuntu 7.7-0ubuntu3.1) 7.7
Copyright (C) 2014 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-linux-gnu".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
Find the GDB manual and other documentation resources online at:
For help, type "help".
Type "apropos word" to search for commands related to "word"...
Reading symbols from avconv...done.
(gdb) run -i concat:01.webm\|01.webm -c:a libvorbis -c:v libtheora while.mkv
Starting program: /home/volodya/bin/avconv -i concat:01.webm\|01.webm -c:a
libvorbis -c:v libtheora while.mkv
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
avconv version v12_dev0-351-g9a5ac36, Copyright (c) 2000-2014 the Libav
  built on Nov  9 2014 10:14:14 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
Input #0, matroska,webm, from 'concat:01.webm|01.webm':
  Duration: 00:01:09.90, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: vp8
      yuv420p, 854x480, PAR 1:1 DAR 427:240
      1k fps, 1k tbn (default)
    Stream #0:1: Audio: vorbis
      44100 Hz, stereo, fltp (default)
File 'while.mkv' already exists. Overwrite ? [y/N] y
[New Thread 0x7ffff58b9700 (LWP 18870)]
[New Thread 0x7ffff50b8700 (LWP 18871)]
[New Thread 0x7ffff48b7700 (LWP 18872)]
[New Thread 0x7ffff40b6700 (LWP 18873)]
[New Thread 0x7ffff38b5700 (LWP 18874)]
[New Thread 0x7ffff30b4700 (LWP 18875)]
[New Thread 0x7ffff28b3700 (LWP 18876)]
[New Thread 0x7ffff20b2700 (LWP 18877)]
[New Thread 0x7ffff18b1700 (LWP 18878)]
[New Thread 0x7ffff10b0700 (LWP 18879)]
[New Thread 0x7ffff08af700 (LWP 18880)]
[New Thread 0x7ffff00ae700 (LWP 18881)]
[New Thread 0x7fffef8ad700 (LWP 18882)]
[New Thread 0x7fffef0ac700 (LWP 18883)]
[New Thread 0x7fffee8ab700 (LWP 18884)]
[New Thread 0x7fffee0aa700 (LWP 18885)]
[New Thread 0x7fffed8a9700 (LWP 18886)]
[New Thread 0x7fffed0a8700 (LWP 18887)]
[New Thread 0x7fffebe1a700 (LWP 18888)]
[New Thread 0x7fffeb619700 (LWP 18889)]
[New Thread 0x7fffeae18700 (LWP 18890)]
[New Thread 0x7fffea617700 (LWP 18891)]
[New Thread 0x7fffe9e16700 (LWP 18892)]
[New Thread 0x7fffe9615700 (LWP 18893)]
[New Thread 0x7fffe8e14700 (LWP 18894)]
[New Thread 0x7fffe8613700 (LWP 18895)]
[New Thread 0x7fffe7e12700 (LWP 18896)]
Output #0, matroska, to 'while.mkv':
    encoder         : Lavf56.6.4
    Stream #0:0: Video: libtheora [theo / 0x6F656874]
      yuv420p, 854x480 [PAR 1:1 DAR 427:240], q=2-31, 200 kb/s
      1k tbn, 1k tbc (default)
      encoder         : Lavc56.6.0 libtheora
    Stream #0:1: Audio: libvorbis [oV[0][0] / 0x566F]
      44100 Hz, stereo, fltp (default)
      encoder         : Lavc56.6.0 libvorbis
Stream mapping:
  Stream #0:0 -> #0:0 (vp8 (native) -> theora (libtheora))
  Stream #0:1 -> #0:1 (vorbis (native) -> vorbis (libvorbis))
Press ctrl-c to stop encoding
Unknown entry 0x1A45DFA30 size=    1492kB time=69.33 bitrate= 176.3kbits/s    
[matroska,webm @ 0x13a3080] Unknown entry 0x18538067
frame= 2095 fps= 59 q=0.0 Lsize=    1499kB time=69.87 bitrate= 175.8kbits/s    
video:773kB audio:673kB other streams:0kB global headers:7kB muxing overhead:
[Thread 0x7fffebe1a700 (LWP 18888) exited]
[Thread 0x7fffeb619700 (LWP 18889) exited]
[Thread 0x7fffeae18700 (LWP 18890) exited]
[Thread 0x7fffea617700 (LWP 18891) exited]
[Thread 0x7fffe9e16700 (LWP 18892) exited]
[Thread 0x7fffe9615700 (LWP 18893) exited]
[Thread 0x7fffe8e14700 (LWP 18894) exited]
[Thread 0x7fffe8613700 (LWP 18895) exited]
[Thread 0x7fffe7e12700 (LWP 18896) exited]
[Thread 0x7ffff38b5700 (LWP 18874) exited]
[Thread 0x7ffff58b9700 (LWP 18870) exited]
[Thread 0x7ffff28b3700 (LWP 18876) exited]
[Thread 0x7ffff18b1700 (LWP 18878) exited]
[Thread 0x7ffff30b4700 (LWP 18875) exited]
[Thread 0x7ffff20b2700 (LWP 18877) exited]
[Thread 0x7ffff50b8700 (LWP 18871) exited]
[Thread 0x7ffff40b6700 (LWP 18873) exited]
[Thread 0x7ffff48b7700 (LWP 18872) exited]
[Thread 0x7ffff00ae700 (LWP 18881) exited]
[Thread 0x7ffff08af700 (LWP 18880) exited]
[Thread 0x7fffed0a8700 (LWP 18887) exited]
[Thread 0x7fffed8a9700 (LWP 18886) exited]
[Thread 0x7fffef0ac700 (LWP 18883) exited]
[Thread 0x7ffff10b0700 (LWP 18879) exited]
[Thread 0x7fffee0aa700 (LWP 18885) exited]
[Thread 0x7fffee8ab700 (LWP 18884) exited]
[Thread 0x7fffef8ad700 (LWP 18882) exited]
[Inferior 1 (process 18866) exited normally]

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