[FFmpeg-user] triming an audio wavfile

[llee040 at sbcglobal.net]

On May 24, 2021, at 8:33 PM, pink panther <pantherlong at gmail.com> wrote:
> 
> I wanted to send you the output again. This time with the quote removed
> just to try it. The output below
> 
> C:\ffmpeg>ffmpeg -i Mohg729.wav -ss 00:00:00.00 -t 00:01:00.00 -c:a copy
> Mohg729a.wav
> ffmpeg version N-101626-gc5341d415c Copyright (c) 2000-2021 the FFmpeg
> developers
>  built with gcc 9.3-win32 (GCC) 20200320
>  configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
> --pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
> --target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
> --disable-w32threads --enable-pthreads --enable-iconv --enable-zlib
> --enable-libxml2 --enable-libfreetype --enable-libfribidi --enable-gmp
> --enable-lzma --enable-fontconfig --enable-opencl --enable-libvmaf
> --disable-vulkan --enable-libvorbis --enable-amf --enable-libaom
> --enable-avisynth --enable-libdav1d --enable-libdavs2 --enable-ffnvcodec
> --enable-cuda-llvm --disable-libglslang --enable-libgme --enable-libass
> --enable-libbluray --enable-libmp3lame --enable-libopus --enable-libtheora
> --enable-libvpx --enable-libwebp --enable-lv2 --enable-libmfx
> --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
> --enable-librav1e --enable-librubberband --enable-schannel --enable-sdl2
> --enable-libsoxr --enable-libsrt --enable-libsvtav1 --enable-libtwolame
> --enable-libuavs3d --enable-libvidstab --enable-libx264 --enable-libx265
> --enable-libxavs2 --enable-libxvid --enable-libzimg
> --extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags=
> --extra-ldflags=-pthread --extra-libs=-lgomp
>  libavutil      56. 69.100 / 56. 69.100
>  libavcodec     58.133.100 / 58.133.100
>  libavformat    58. 75.100 / 58. 75.100
>  libavdevice    58. 12.100 / 58. 12.100
>  libavfilter     7.109.100 /  7.109.100
>  libswscale      5.  8.100 /  5.  8.100
>  libswresample   3.  8.100 /  3.  8.100
>  libpostproc    55.  8.100 / 55.  8.100
> [wav @ 000001e2b12a4580] Estimating duration from bitrate, this may be
> inaccurate
> [wav @ 000001e2b12a4580] Could not find codec parameters for stream 0
> (Audio: none (3[1][0][0] / 0x0133), 8000 Hz, 1 channels, 8 kb/s): unknown
> codec
> Consider increasing the value for the 'analyzeduration' (0) and 'probesize'
> (5000000) options
> Guessed Channel Layout for Input Stream #0.0 : mono
> Input #0, wav, from 'Mohg729.wav':
>  Duration: 00:05:32.55, bitrate: 8 kb/s
>  Stream #0:0: Audio: none (3[1][0][0] / 0x0133), 8000 Hz, mono, 8 kb/s
> Output #0, wav, to 'Mohg729a.wav':
>  Metadata:
>    ISFT            : Lavf58.75.100
>  Stream #0:0: Audio: none (3[1][0][0] / 0x0133), 8000 Hz, mono, 8 kb/s
> Stream mapping:
>  Stream #0:0 -> #0:0 (copy)
> Press [q] to stop, [?] for help
> size=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
> video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB
> muxing overhead: unknown
> 
> C:\ffmpeg>
> 


I guess I'm not familiar with that version of ffmpeg, so maybe someone else can help.

Laine