ffmpeg pipe:0: could not find codec parameters - ffmpeg

Question

When i run this command i get an error. If i run without the pipe, it works.
With Pipe
cat mymovie.m4v | ffmpeg -i pipe:0 -an -analyzeduration 1000000 -f image2 -vf
"select='eq(pict_type,PICT_TYPE_I)'" -vsync vfr 'public/files/thumb%04d.png'
Without Pipe (Works)
ffmpeg -i mymovie.m4v -an -analyzeduration 2147483647 -probesize 2147483647 -f image2 -vf
"select='eq(pict_type,PICT_TYPE_I)'" -vsync vfr 'public/files/thumb%04d.png'
Output
ffmpeg version 2.2 Copyright (c) 2000-2014 the FFmpeg developers
built on Apr 10 2014 17:50:46 with Apple LLVM version 5.1 (clang-503.0.38)
(based on LLVM 3.4svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/2.2
--enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree
--enable-hardcoded-tables --enable-avresample --enable-vda --cc=clang
--host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame
--enable-libxvid --enable-libfreetype --enable-libtheora --enable-libvorbis
--enable-libvpx --enable-librtmp --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libvo-aacenc --enable-libass --enable-ffplay --enable-libspeex
--enable-libschroedinger --enable-libfdk-aac --enable-libopus --enable-frei0r
--enable-libopenjpeg --extra-cflags='-
I/usr/local/Cellar/openjpeg/1.5.1_1/include/openjpeg-1.5 '
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
libavresample 1. 2. 0 / 1. 2. 0
libswscale 2. 5.102 / 2. 5.102
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
[mov,mp4,m4a,3gp,3g2,mj2 # 0x7fd87b80f000] stream 0, offset 0x2c: partial file
[mov,mp4,m4a,3gp,3g2,mj2 # 0x7fd87b80f000] Could not find codec parameters for stream 0
(Video: h264 (avc1 / 0x31637661), 1280x720, 3310 kb/s): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
pipe:0: could not find codec parameters
I have tried setting (link)
-analyzeduration100 -probesize 10000000
-analyzeduration 2147483647 -probesize 2147483647
Still didn't work.

Answer 1

MP4 container is not the best choice for piping. The muxer that made the MP4 file may place certain info at the end of the file. This info is required for proper demuxing, but is not immediately available if using a pipe. However, you have a few options:
Don't use a pipe
I don't know why you need to use a pipe in the first place. Just use the file as a normal input:
ffmpeg -i input.mp4 ...
Don't use MP4
If you must use a pipe then consider using some other container such as .mkv or .ts for your input.
Re-mux your MP4 then pipe
If you must use MP4 then one method is to re-arrange the moov atom so it is at the beginning of the file:
ffmpeg -i input.mp4 -c copy -movflags +faststart output.mp4