[FFmpeg-user] triming an audio wavfile

pink panther pantherlong at gmail.com
Tue May 25 04:33:30 EEST 2021


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>

On Mon, May 24, 2021 at 9:27 PM pink panther <pantherlong at gmail.com> wrote:

> I  notice the extra space also. I removed it after sending the email to
> you. That didn't work either.
> The file extension is the same because I am not changing the type. I am
> just trying to change the length of the music audio to 1 minute
>
> On Mon, May 24, 2021 at 9:21 PM llee040 at sbcglobal.net <
> llee040 at sbcglobal.net> wrote:
>
>> On May 24, 2021, at 7:55 PM, pink panther <pantherlong at gmail.com> wrote:
>> >
>> > I got the error shown to the bottom of the page. Strange, because the
>> file
>> > is in the ffmpeg directory
>> >
>> > 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
>> > *'Mohg729.wav: No such file or directory*
>> >
>>
>>
>> I notice that there’s a space between the end of the file name and the
>> final single quote in the file specification of your example. That could
>> result in such an error. Also, the ffmpeg executable uses that file name
>> extension (“.wav”), so I would suggest that you not use the space at the
>> end of the output file specification, either.
>>
>> Laine
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>


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