[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
>
> I'm sorry but I've already tried this:
>
> 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'
>
> I've also tried changing the slashes in the ffmpeg parameters but it
> really does not help
> and I get the same bug. Maybe I'm doing it wrong.

Try "file 'file://server/..'"

> If so, could you supply a notation that you know for a fact to be working?

Not really :)

Also, please use the ffmpeg-user mailing list for similar questions.

Thanks,
Marton

>
> -steinar
>
>
>> > 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".
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