This is the output:
ffmpeg version 4.4.1-full_build-www.gyan.dev Copyright (c) 2000-2021 the
FFmpeg developers
built with gcc 11.2.0 (Rev1, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static
--disable-w32threads --disable-autodetect --enable-fontconfig
--enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma
--enable-libsnappy --enable-zlib --enable-librist --enable-libsrt
--enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray
--enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libzvbi
--enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264
--enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg
--enable-libvpx --enable-libass --enable-frei0r --enable-libfreetype
--enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg
--enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec
--enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2
--enable-libmfx --enable-libglslang --enable-vulkan --enable-opencl
--enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt
--enable-libopencore-amrwb --enable-libmp3lame --enable-libshine
--enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc
--enable-libilbc --enable-libgsm --enable-libopencore-amrnb
--enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa
--enable-libbs2b --enable-libflite --enable-libmysofa
--enable-librubberband --enable-libsoxr --enable-chromaprint
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, wav, from
'\\.\pipe\FFMpegCore_5af55f72-2307-408f-989d-50a819539903':
Duration: N/A, bitrate: 256 kb/s
Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 8000 Hz, stereo,
s16, 256 kb/s
Stream mapping:
Stream #0:0 -> #0:0 (pcm_s16le (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
Output #0, mp3, to
'\\.\pipe\FFMpegCore_3c1a6c57-09c6-4169-b5bb-9a7ce72c54da':
Metadata:
TSSE : Lavf58.76.100
Stream #0:0: Audio: mp3, 8000 Hz, stereo, s16p
Metadata:
encoder : Lavc58.134.100 libmp3lame
size= 0kB time=00:00:00.00 bitrate=N/A speed=N/A
size= 19kB time=00:00:06.19 bitrate= 24.9kbits/s speed=7.81x
\\.\pipe\FFMpegCore_5af55f72-2307-408f-989d-50a819539903: Invalid argument
size= 39kB time=00:00:13.10 bitrate= 24.4kbits/s speed= 16x
video:0kB audio:39kB subtitle:0kB other streams:0kB global headers:0kB
muxing overhead: 0.112613%
On Wed, Sep 13, 2023 at 7:08 PM Ferdi Scholten<fe...@sttc-nlp.nl> wrote:
Hi! I'm using this command to convert wav audio to mp3:
-i "\\.\pipe\FFMpegCore_d1110724-bf07-4ada-9ea4-5b404aea3d52" -b:a 64k
-f
mp3 "\\.\pipe\FFMpegCore_c9edc9bd-8061-42a8-a806-ff34bfa7408d" -y
I would like it to go faster. How can I make it faster?
Thanks!
Please post complete terminal output of that command.
How about trying to use a recent version of FFmpeg instead of the
ancient 4.4? We are at version 6 nowadays.
So your conversion speed is 16x. On my laptop ( 5 years old quadcore
skylake based i7 8650U) a conversion from wav to mp3 with FFmpeg 6 runs
at 17x while the system is at full load from other tasks. (mainly caused
by simultaneously converting a 2 hour documentary movie to av1 with
FFmpeg using libsvtav1 and opus).
Your speed might be limited by system constraints, like IO speed, cpu
speed, number of cores, load and memory size/speed etc.
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