3.6.4 unexpected crash - real-time transcoder

Our Wowza server crashed randomly. Looking at the logs, it appears to be related to the real-time transcoder. Both the error.log and access.log have this final entry and then it crashed:

TranscoderWorkerVideoDecoder.setupDecoder: Error videoDecoderCreate: 4294967295

Can you please assist? Here are the last error logs.

error.log

WARN    server  comment 2014-09-10      19:12:51        -       -       -       -       -       599364.15       -       -       -       -       -       -       -       -       TranscodingSession.handlePacket[phlive/_definst_]: Video codec is not supported by transcoder. Can only be used as PassThru: VP6
WARN    server  comment 2014-09-10      19:12:51        -       -       -       -       -       599364.153      -       -       -       -       -       -       -       -       TranscodingSession.setupDecoder[_defaultVHost_:phlive/_definst_/wkkzssyfln_a]: MP3 sample rate is not supported by decoder [22050]. Supported sample rates [32000, 44100, 48000]. Audio will not be processed.
WARN    server  comment 2014-09-10      19:12:51        -       -       -       -       -       599364.155      -       -       -       -       -       -       -       -       CupertinoPacketHandler.handleHolder[phlive/_definst_/wkkzssyfln_a]: Invalid video codec for iPhone/iPod: VP6
WARN    server  comment 2014-09-10      19:14:04        -       -       -       -       -       599437.063      -       -       -       -       -       -       -       -       TranscodingSession.handlePacket[phlive/_definst_]: Video codec is not supported by transcoder. Can only be used as PassThru: VP6
WARN    server  comment 2014-09-10      19:14:04        -       -       -       -       -       599437.067      -       -       -       -       -       -       -       -       TranscodingSession.setupDecoder[_defaultVHost_:phlive/_definst_/wkkzssyfln_a]: MP3 sample rate is not supported by decoder [22050]. Supported sample rates [32000, 44100, 48000]. Audio will not be processed.
WARN    server  comment 2014-09-10      19:14:04        -       -       -       -       -       599437.075      -       -       -       -       -       -       -       -       CupertinoPacketHandler.handleHolder[phlive/_definst_/wkkzssyfln_a]: Invalid video codec for iPhone/iPod: VP6
WARN    server  comment 2014-09-10      19:15:09        -       -       -       -       -       599501.627      -       -       -       -       -       -       -       -       TranscodingSession.handlePacket[phlive/_definst_]: Video codec is not supported by transcoder. Can only be used as PassThru: VP6
WARN    server  comment 2014-09-10      19:15:09        -       -       -       -       -       599501.634      -       -       -       -       -       -       -       -       CupertinoPacketHandler.handleHolder[phlive/_definst_/wkkzssyfln]: Invalid video codec for iPhone/iPod: VP6
WARN    server  comment 2014-09-10      19:15:26        -       -       -       -       -       599518.601      -       -       -       -       -       -       -       -       TranscoderWorkerVideoDecoder.handlePacketVideo[_defaultVHost_:phlive/_definst_/wkkzssyfln]: Video decoder pending frame count[176] is greater than limit[150], resetting
WARN    server  comment 2014-09-10      19:15:26        -       -       -       -       -       599518.601      -       -       -       -       -       -       -       -       TranscoderWorkerVideoDecoder.setupDecoder: Error videoDecoderCreate: 4294967295

access_log

2014-09-10      19:15:26        GMT-00:00       comment server  INFO    200     -       LiveStreamPacketizerSanJose.endChunkTS[phlive/_definst_/wkkzssyfln_a]: Add chunk: id:8 a/v/k:390/112/2 duration:10182   -       -       -       599518.528      -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -      --       -       -       -       -       -       -
2014-09-10      19:15:26        GMT-00:00       comment server  WARN    200     -       TranscoderWorkerVideoDecoder.handlePacketVideo[_defaultVHost_:phlive/_definst_/wkkzssyfln]: Video decoder pending frame count[176] is greater than limit[150], resetting        -       -       -       599518.601      -       -       -       -       -       -       -       -       -       -      --       -       -       -       -       -       -       -       -       -       -       -       -       -
2014-09-10      19:15:26        GMT-00:00       comment server  WARN    200     -       TranscoderWorkerVideoDecoder.setupDecoder: Error videoDecoderCreate: 4294967295 -       -       -      599518.601       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -       -      --       -

Sorry I should have posted this on the 3.x forum. Please let me know either way what the root cause is.