I'm trying to create a sine wave in .wav using ffmpeg exactly like this S.E. question: How to generate a sine wave with ffmpeg?
For some sample formats it's working good but for big endian encoding, it's not.
Here is my command:
ffmpeg -f lavfi -i "sine=frequency=1000:duration=5" -c:a pcm_f32be test.wav
And its output
ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
libavutil 54. 31.100 / 54. 31.100
libavcodec 56. 60.100 / 56. 60.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 40.101 / 5. 40.101
libavresample 2. 1. 0 / 2. 1. 0
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, lavfi, from 'sine=frequency=1000:duration=5':
Duration: N/A, start: 0.000000, bitrate: 705 kb/s
Stream #0:0: Audio: pcm_s16le, 44100 Hz, mono, s16, 705 kb/s
[wav @ 0x174f080] pcm_f32be codec not supported in WAVE format
Output #0, wav, to 'test.wav':
Metadata:
encoder : Lavf56.40.101
Stream #0:0: Audio: pcm_f32be, 44100 Hz, mono, flt, 1411 kb/s
Metadata:
encoder : Lavc56.60.100 pcm_f32be
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le (native) -> pcm_f32be (native))
Could not write header for output file #0 (incorrect codec parameters ?): Function not implemented
But a file is actually created:
$ ls -al test.wav
-rw-rw-r-- 1 user user 20 oct. 30 17:22 test.wav
Where 20 is the size of the file.
My question is: why such a file is created even though the encoding failed?
