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I recorded an audio utilizing Audacity, then elevated its quantity 10 occasions utilizing ffmpeg. When I’m sending this audio as attachment to my pals to check, then folks with older iPhones are capable of hear it high quality (quantity remains to be low although), however folks on iPhone 14 and better should not listening to my voice within the mp3 in any respect.
Really, on iPhone 14 and better, my voice is there in audio, however its so low in quantity that it is nearly inaudible, unattainable to listen to. I can hear it if I pressure actually actually so much. Different issues on the telephone are taking part in high quality, audio settings are displaying full.
If I add a background music to the audio utilizing ffmpeg, then folks on iPhone 14 and better are solely listening to the music, not my voice.
What is going on right here?
Edit: That is definitely a ffmpeg difficulty. I elevated quantity in enter file utilizing audacity and tried taking part in the brand new file on iPhone 14, it has considerably larger quantity, can hear myself somewhat however nonetheless not a lot. In any case, no matter Audacity did to extend quantity, that labored, and no matter ffmpeg is doing with my beneath command, it is not working in any respect.
My query is: Do I want to regulate some frequency and so on choices/settings within the enter when utilizing ffmpeg to extend the quantity? What ffmpeg command can I take advantage of to repair the problem, in order that quantity elevated recordsdata play on all gadgets?
Thanks
Right here is the ffmpeg command I’m utilizing to extend quantity in my recorded audio. Output mp3 file from beneath command is uploaded right here:
https://tbrjar.com/audio_test/z1.mp3
and this is the unique enter file as recorded by audacity:
https://tbrjar.com/audio_test/enter.mp3
% ffmpeg -ss 00:00:00 -i enter.mp3 -to 00:00:05 -filter:a "quantity=10" -c:a libmp3lame z1.mp3
ffmpeg model 2024-03-04-git-e30369bc1c-full_build-www.gyan.dev Copyright (c) 2000-2024 the FFmpeg builders
constructed with gcc 13.2.0 (Rev5, Constructed by MSYS2 undertaking)
configuration: --enable-gpl --enable-version3 --enable-static --pkg-config=pkg
conf --disable-w32threads --disable-autodetect --enable-fontconfig --enable-icon
v --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --e
nable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh -
-enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sd
l2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdav
s2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --en
able-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvi
d --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-
mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-li
bfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-l
ibvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-
ffnvcodec --enable-nvdec --enable-nvenc --enable-dxva2 --enable-d3d11va --enable
-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl
--enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enabl
e-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --e
nable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --e
nable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --ena
ble-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmys
ofa --enable-librubberband --enable-libsoxr --enable-chromaprint
libavutil 58. 40.100 / 58. 40.100
libavcodec 60. 41.100 / 60. 41.100
libavformat 60. 23.100 / 60. 23.100
libavdevice 60. 4.100 / 60. 4.100
libavfilter 9. 17.100 / 9. 17.100
libswscale 7. 6.100 / 7. 6.100
libswresample 4. 14.100 / 4. 14.100
libpostproc 57. 4.100 / 57. 4.100
Enter #0, mp3, from 'luck1.mp3':
Length: 00:00:54.02, begin: 0.025057, bitrate: 133 kb/s
Stream #0:0: Audio: mp3 (mp3float), 44100 Hz, stereo, fltp, 133 kb/s
Metadata:
encoder : LAME3.100
Stream mapping:
Stream #0:0 -> #0:0 (mp3 (mp3float) -> mp3 (libmp3lame))
Press [q] to cease, [?] for assist
Output #0, mp3, to 'z1.mp3':
Metadata:
TSSE : Lavf60.23.100
Stream #0:0: Audio: mp3, 44100 Hz, stereo, fltp
Metadata:
encoder : Lavc60.41.100 libmp3lame
[out#0/mp3 @ 00000000001a7340] video:0KiB audio:79KiB subtitle:0KiB different stream
s:0KiB international headers:0KiB muxing overhead: 0.313639%
dimension= 79KiB time=00:00:05.00 bitrate= 129.5kbits/s pace=18.2x
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