The above single quotes and without quotes only safe if it only contains 'letters, digits, period(except prefix), underscore and hyphen'.

Safe file name (without quotes): file song1.m4a Safe file name (single quotes): file 'song1.m4a'

Unsafe file name (double quotes treats as part of filename, -safe 0 can't fix this): file 'song1.m4a' I use ffmpeg -f concat -i concat.txt -c copy output.m4a command, which the concat.txt contains list of input file to concat. In my case, double quotes causes the error.

Unsafe file name '/mnt/backupsystem/archive2/Videos/20151222/PRIVATE/AVCHD/BDMV/STREAM'Īny ideas what goes wrong here? What does the term 'unsafe file' mean in this context?

Trying to convert a bunch of mts-files into a big mp4-file: ~/bin/ffmpeg-git-20160817-64bit-static/ffmpeg -v info -f concat -i <(find STREAM -name '*' -printf 'file '$PWD/%p' ') -deinterlace -r 25 -s hd720 -c:v libx264 -crf 23 -acodec copy -strict -2 ~/tmp/Videos/20151222.mp4įfmpeg version N-81364-gf85842b-static Copyright (c) 2000-2016 the FFmpeg developersīuilt with gcc 5.4.1 (Debian 5.4.1-1) 20160803Ĭonfiguration: -enable-gpl -enable-version3 -enable-static -disable-debug -enable-libmp3lame -enable-libx264 -enable-libx265 -enable-libwebp -enable-libspeex -enable-libvorbis -enable-libvpx -enable-libfreetype -enable-fontconfig -enable-libxvid -enable-libopencore-amrnb -enable-libopencore-amrwb -enable-libtheora -enable-libvo-amrwbenc -enable-gray -enable-libopenjpeg -enable-libopus -enable-libass -enable-gnutls -enable-libvidstab -enable-libsoxr -enable-frei0r -enable-libfribidi -disable-indev=sndio -disable-outdev=sndio -enable-librtmp -enable-libmfx -enable-libzimg -cc=gcc-5

Ffmpeg concat each file as chapter