I have written cygwin based shell script to concate 2 .mkv files as below,
#!/bin/sh
ffmpeg -f concat -i concat.txt -codec copy out.mkv
concat.txt contains path to 2 mkv files to be concatenated
file '../temp/1'
file '../temp/2'
when I run script from cygwin terminal I get following error
Rishi@Rishikesh /cygdrive/i/video/Interface_code/Testing_function/bin
$ . script.sh
ffmpeg version 2.5.2 Copyright (c) 2000-2014 the FFmpeg developers
built on Dec 30 2014 17:13:24 with gcc 4.9.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable- avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp -- enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
libavutil 54. 15.100 / 54. 15.100
libavcodec 56. 13.100 / 56. 13.100
libavformat 56. 15.102 / 56. 15.102
libavdevice 56. 3.100 / 56. 3.100
libavfilter 5. 2.103 / 5. 2.103
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 1.100 / 1. 1.100
libpostproc 53. 3.100 / 53. 3.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, concat, from 'concat.txt':
Duration: N/A, start: 0.000000, bitrate: 1536 kb/s
Stream #0:0: Video: h264 (High), yuv420p, 720x576 [SAR 1:1 DAR 5:4], 25 fps, 25 tbr, 1k tbn, 50 tbc
Stream #0:1: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
'NULL @ 04780280] Unable to find a suitable output format for 'out.mkv
: Invalid argument
another thing to add, if I run this command from cygwin terminal directly(instead of calling it through script) it runs correctly and creates concatenated output .mkv file
Applying dos2unix command on shell script file solved my problem. Hope it helps someone.