[FFmpeg-user] Remove audio from DV file not working

[Tim Hiles]

On Mon, Dec 26, 2016 at 4:08 PM, Moritz Barsnick <barsnick at gmx.net> wrote:

> On Mon, Dec 26, 2016 at 14:47:11 -0800, Tim Hiles wrote:
> > Output #0, dv, to 'noaudio.dv':
> >   Metadata:
> >     timecode        : 00:33:32;19
> >     encoder         : Lavf57.61.100
> >     Stream #0:0: Video: dvvideo, yuv411p, 720x480 [SAR 8:9 DAR 4:3],
> q=2-31, 25000 kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97 tbc
> > Stream mapping:
> >   Stream #0:0 -> #0:0 (copy)
> [...]
> > I still have audio in the video file. Any thoughts?
>
> I can hardly believe that. Are you sure you checked noaudio.dv? ffmpeg
> isn't reporting putting any audio tracks into that output.
>
> Moritz



This is the ffmpeg info on noaudio.dv.  even the filesize is the same. And
ffplay plays the video with audio.

ffmpeg -i "noaudio.dv"

ffmpeg version N-82889-g54931fd Copyright (c) 2000-2016 the FFmpeg
developers
  built with gcc 5.4.0 (GCC)
  configuration: --enable-gpl --enable-version3 --enable-dxva2
--enable-libmfx --enable-nvenc --enable-avisynth --enable
-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv
--enable-libass --enable-libbluray --enable-li
bbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm
--enable-libilbc --enable-libmodplug --enabl
e-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenh264 --enable-libopenjpeg --enable-li
bopus --enable-librtmp --enable-libsnappy --enable-libsoxr
--enable-libspeex --enable-libtheora --enable-libtwolame --en
able-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavpack --enable-libwebp --enable
-libx264 --enable-libx265 --enable-libxavs --enable-libxvid
--enable-libzimg --enable-lzma --enable-decklink --enable-zl
ib
  libavutil      55. 43.100 / 55. 43.100
  libavcodec     57. 68.100 / 57. 68.100
  libavformat    57. 61.100 / 57. 61.100
  libavdevice    57.  2.100 / 57.  2.100
  libavfilter     6. 68.100 /  6. 68.100
  libswscale      4.  3.101 /  4.  3.101
  libswresample   2.  4.100 /  2.  4.100
  libpostproc    54.  2.100 / 54.  2.100
[dv @ 00000000005aa700] Estimating duration from bitrate, this may be
inaccurate
Input #0, dv, from 'noaudio.dv':
  Metadata:
    timecode        : 00:33:32;19
  Duration: 00:00:30.96, start: 0.000000, bitrate: 28771 kb/s
    Stream #0:0: Video: dvvideo, yuv411p, 720x480 [SAR 8:9 DAR 4:3], 25000
kb/s, 29.97 fps, 29.97 tbr, 29.97 tbn, 29.97
tbc
    Stream #0:1: Audio: pcm_s16le, 32000 Hz, stereo, s16, 1024 kb/s
    Stream #0:2: Audio: pcm_s16le, 32000 Hz, stereo, s16, 1024 kb/s
At least one output file must be specified