Can I convert image to video? missing function: madvise

[curtastic]

I assume videoconvert doesn't support converting images to video or it would be in the demo, as it seems to me it would be one of the most common use cases.

I tried running this. Not sure if it's correct.
-r 60 -f image2 -s 1920x1080 -i input.jpeg -vcodec libx264 -crf 25 -pix_fmt yuvj422p output.mp4

Output:

Worker has received command
Received command: -r 60 -f image2 -s 1920x1080 -i input.jpeg -vcodec libx264 -crf 25 -pix_fmt yuvj422p output.mp4. Processing with 268435456 bits.
ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
built on Jun 9 2014 20:24:32 with emcc (Emscripten GCC-like replacement) 1.12.0 (commit 6960d2296299e96d43e694806f5d35799ef8d39c)
configuration: --cc=emcc --prefix=/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist --extra-cflags='-I/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/include -v' --enable-cross-compile --target-os=none --arch=x86_32 --cpu=generic --disable-ffplay --disable-ffprobe --disable-ffserver --disable-asm --disable-doc --disable-devices --disable-pthreads --disable-w32threads --disable-network --disable-hwaccels --disable-parsers --disable-bsfs --disable-debug --disable-protocols --disable-indevs --disable-outdevs --enable-protocol=file --enable-libvpx --enable-gpl --extra-libs='/Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/lib/libx264.a /Users/bgrinstead/Sites/videoconverter.js/build/ffmpeg/../dist/lib/libvpx.a'
libavutil 52. 66.100 / 52. 66.100
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.100 / 55. 33.100
libavdevice 55. 10.100 / 55. 10.100
libavfilter 4. 2.100 / 4. 2.100
libswscale 2. 5.102 / 2. 5.102
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
[mjpeg @ 0xed8cd0] Warning: not compiled with thread support, using thread emulation
[mjpeg @ 0xed8cd0] No JPEG data found in image
[mjpeg @ 0xed8cd0] Single field
Input #0, image2, from 'input.jpeg':
Duration: 00:00:00.02, start: 0.000000, bitrate: N/A
Stream #0:0: Video: mjpeg, yuvj420p(pc), 1024x1280 [SAR 72:72 DAR 4:5], 60 tbr, 60 tbn, 60 tbc
[swscaler @ 0xec6160] deprecated pixel format used, make sure you did set range correctly
[libx264 @ 0xed9a00] Warning: not compiled with thread support, using thread emulation
[libx264 @ 0xed9a00] using SAR=1/1
[libx264 @ 0xed9a00] using cpu capabilities: none!
missing function: madvise
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