[FFmpeg-devel] Problem with "-f concat" and mixed path types on Windows.

[Marton Balint]

On Sat, 2 Jan 2021, Steinar Apalnes wrote:

> Hi,
> It looks like the -f concat options has a problem when mixingUNC paths in
> the concat file and local concat file path in command line:
>
>
> Concat file:
>
> ffconcat version 1.0
> file '\\server\CanonXF\CONTENTS\CLIPS001\AA4002\AA400201.MXF'
> file '\\server\CanonXF\CONTENTS\CLIPS001\AA4002\AA400202.MXF'
> file '\\server\CanonXF\CONTENTS\CLIPS001\AA4002\AA400203.MXF'
> file '\\server\CanonXF\CONTENTS\CLIPS001\AA4002\AA400204.MXF'
> file '\\server\CanonXF\CONTENTS\CLIPS001\AA4002\AA400205.MXF'
>
>
> Full command:
>
> "D:\FFMpeg\x64\ffmpeg.exe" -f concat -safe 0 -i "d:\temp\AA4002.mxf.concat"
> -map 0 -c copy -y "d:\temp\AA4002.mxf"

As a quick workaround you can use forward slashes instead of backslashes 
in the paths you use.

Regards,
Marton

>
>
> Full ffmpeg output:
>
> ffmpeg version N-99922-g8b819bcb9e Copyright (c) 2000-2020 the FFmpeg
> developers
>  built with gcc 10.2.0 (Rev5, Built by MSYS2 project)
>  configuration:  --disable-static --enable-shared --cc='ccache gcc'
> --cxx='ccache g++' --disable-autodetect --enable-amf --enable-bzlib
> --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-iconv
> --enable-lzma --enable-nvenc --enable-zlib --enable-sdl2 --enable-ffnvcodec
> --enable-nvdec --enable-cuda-llvm --enable-libmp3lame --enable-libopus
> --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libdav1d
> --enable-libaom --disable-debug --enable-fontconfig --enable-libass
> --enable-libbluray --enable-libfreetype --enable-libmfx --enable-libmysofa
> --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
> --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora
> --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc
> --enable-libwebp --enable-libxml2 --enable-libzimg --enable-libshine
> --enable-gpl --enable-avisynth --enable-libxvid --enable-libopenmpt
> --enable-version3 --enable-librav1e --enable-libsrt --enable-libgsm
> --enable-libvmaf --enable-libsvtav1 --enable-mbedtls
> --extra-cflags=-DLIBTWOLAME_STATIC --extra-libs=-lstdc++
> --extra-cflags=-DLIBXML_STATIC --extra-libs=-liconv --disable-w32threads
> --shlibdir=/local64/bin-video
>  libavutil      56. 60.100 / 56. 60.100
>  libavcodec     58.112.103 / 58.112.103
>  libavformat    58. 64.100 / 58. 64.100
>  libavdevice    58. 11.102 / 58. 11.102
>  libavfilter     7. 89.100 /  7. 89.100
>  libswscale      5.  8.100 /  5.  8.100
>  libswresample   3.  8.100 /  3.  8.100
>  libpostproc    55.  8.100 / 55.  8.100
> [concat @ 000001fa3b087f80] Impossible to open
> 'd:\\server\CanonXF\CONTENTS\CLIPS001\AA4002\AA400201.MXF'
> d:\temp\AA4002.mxf.concat: No such file or directory
>
>
> As you see, it seems for some strange reason that it adds a local "d:"
> before the UNC path "\\server\....", which of course will not work. There's
> nothing else wrong with the command or concat files cause if I change the
> content of the concat file to the local representation of the
> \\server\CanonXF share E: it works just fine. Same if the concat file is on
> the \\server share. So it seems that concat wants the files in the list to
> have the same path type as the concat file itself.
>
> Steinar Apalnes
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>
> To unsubscribe, visit link above, or email
> ffmpeg-devel-request at ffmpeg.org with subject "unsubscribe".