When Echo360 Personal Capture is set to record video and display, the output file is a container containing both video
streams (at least on Windows 7). If you want to edit this footage in third party software before uploading it into Echo
you'll probably need to seperate these video streams. Using ffmpeg
is one way to do this.
ffmpeg -i audiovideodisplay.wmv \
-map 0:0 \
-map 0:2 \
-codec:a libmp3lame \
-codec:v mpeg2video \
video-only-output.mp4
An inspection of my sample file looks like this:
$ ffmpeg -i audiovideodisplay.wmv
ffmpeg version N-78304-g37db3e8 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.3.0 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfi
g --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --
enable-libdcadec --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libm
p3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --en
able-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --ena
ble-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-lib
x265 --enable-libxavs --enable-libxvid --enable-libzimg --enable-lzma --enable-decklink --enable-zlib
libavutil 55. 17.100 / 55. 17.100
libavcodec 57. 24.101 / 57. 24.101
libavformat 57. 24.100 / 57. 24.100
libavdevice 57. 0.101 / 57. 0.101
libavfilter 6. 28.100 / 6. 28.100
libswscale 4. 0.100 / 4. 0.100
libswresample 2. 0.101 / 2. 0.101
libpostproc 54. 0.100 / 54. 0.100
Input #0, asf, from 'audiovideodisplay.wmv':
Metadata:
NumberOfFrames : 3928
IsVBR : 0
MediaFoundationVersion: 2.112
Duration: 00:13:06.97, start: 0.000000, bitrate: 1064 kb/s
Stream #0:0(eng): Audio: wmapro (b[1][0][0] / 0x0162), 44100 Hz, stereo, fltp, 64 kb/s
Stream #0:1(eng): Video: wmv2 (WMV2 / 0x32564D57), yuv420p, 1920x1080, 4000 kb/s, SAR 1:1 DAR 16:9, 14.17 tbr, 1k tb
n, 1k tbc
Stream #0:2(eng): Video: wmv2 (WMV2 / 0x32564D57), yuv420p, 1280x720, 6000 kb/s, SAR 1:1 DAR 16:9, 5 fps, 5 tbr, 1k
tbn, 1k tbc
At least one output file must be specified
This file contains three streams listed towards the end: audio, display, and video.
[TODO: explain this more for 1yr-in-the-futre me...]