Transcoding HD video for Panasonic BDP

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DS Src : File Source (Async.) (240-mpeg_ntsc-mpeg2video-ac3-sn.mzt)
Splitter : MPEG2 Program
Video : MPEG2 Video
Audio : AC3

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ffmpeg version N-49584-g5a83115 Copyright (c) 2000-2013 the FFmpeg developers
built on Feb 4 2013 20:20:22 with gcc 4.7.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-libass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxavs --enable-libxvid --enable-zlib
libavutil 52. 17.101 / 52. 17.101
libavcodec 54. 91.100 / 54. 91.100
libavformat 54. 61.104 / 54. 61.104
libavdevice 54. 3.103 / 54. 3.103
libavfilter 3. 35.101 / 3. 35.101
libswscale 2. 2.100 / 2. 2.100
libswresample 0. 17.102 / 0. 17.102
libpostproc 52. 2.100 / 52. 2.100
[mpeg @ 020a95a0] max_analyze_duration 60000000 reached at 60026633 microseconds
Input #0, mpeg, from 'O:\ext-media\240-mpeg_ntsc-mpeg2video-ac3-sn.mkv':
Duration: 00:56:44.35, start: 0.533367, bitrate: 2830 kb/s
Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p, 720x576 [SAR 1:1 DAR 5:4], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Stream #0:1[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 384 kb/s
At least one output file must be specified

<MEZZMO>: Child process ended with code: 109, ExitCode=1

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I was able to get the BDT210 working by switching to the Panasonic BDP MPEG-TS profile--most mkv's work. Transcoding seems immediate, but FF, etc is very very slow. Some MKVs just get a blank screen with no error. The log files correctly indicate that file is already transcoded, and the transcoded file plays with no issue in Zoom player.