The iPhone uses the m4a format which supersedes mp3. The best codec is Fraunhofer, which is non GPL compliant. To convert a YouTube video to Fraunhofer m4a, download the audio then open the audio file in iTunes if possible. Then simply save in m4a format. If you don't care for the best format, skip this post. There are simpler ways to get the m4a files directly from YouTube. When you asked for the best audio quality, YouTube will probably give you OGG and OPUS files which are not recognized by iTunes. So multiples steps are required. First give the command to extract the best audio in the codec used by YouTube. Enter command in GREEN. BigMac:~ munim$ youtube-dl -f bestaudio --extract-audio --audio-quality 0 https://www.youtube.com/watch?v=zRIbf6JqkNc [youtube] zRIbf6JqkNc: Downloading webpage [youtube] zRIbf6JqkNc: Downloading video info webpage [youtube] zRIbf6JqkNc: Extracting video information WARNING: unable to extract uploader nickname [download] Destination: Guns N' Roses - Don't Cry-zRIbf6JqkNc.webm [download] 100% of 4.59MiB in 01:58 [ffmpeg] Destination: Guns N' Roses - Don't Cry-zRIbf6JqkNc.opus Deleting original file Guns N' Roses - Don't Cry-zRIbf6JqkNc.webm (pass -k to keep) Then use ffmpeg with libfdk option. You must have previously compiled ffmpeg with libfdk. Enter command in GREEN. BigMac:~ munim$ ffmpeg -i Guns\ N\'\ Roses\ -\ Don\'t\ Cry-zRIbf6JqkNc.opus -c:a libfdk_aac DontCry.m4a ffmpeg version 3.3.3 Copyright (c) 2000-2017 the FFmpeg developers built with Apple LLVM version 8.1.0 (clang-802.0.42) configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.3 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-frei0r --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --disable-lzma --enable-libopenjpeg --disable-decoder=jpeg2000 --extra-cflags=-I/usr/local/Cellar/openjpeg/2.1.2_1/include/openjpeg-2.1 --enable-nonfree --enable-vda libavutil 55. 58.100 / 55. 58.100 libavcodec 57. 89.100 / 57. 89.100 libavformat 57. 71.100 / 57. 71.100 libavdevice 57. 6.100 / 57. 6.100 libavfilter 6. 82.100 / 6. 82.100 libavresample 3. 5. 0 / 3. 5. 0 libswscale 4. 6.100 / 4. 6.100 libswresample 2. 7.100 / 2. 7.100 libpostproc 54. 5.100 / 54. 5.100 Input #0, ogg, from 'Guns N' Roses - Don't Cry-zRIbf6JqkNc.opus': Duration: 00:05:13.05, start: 0.007500, bitrate: 121 kb/s Stream #0:0(eng): Audio: opus, 48000 Hz, stereo, fltp Metadata: LANGUAGE : eng ENCODER : Lavf57.71.100 Stream mapping: Stream #0:0 -> #0:0 (opus (native) -> aac (libfdk_aac)) Press [q] to stop, [?] for help Output #0, ipod, to 'DontCry.m4a': Metadata: encoder : Lavf57.71.100 Stream #0:0(eng): Audio: aac (libfdk_aac) (mp4a / 0x6134706D), 48000 Hz, stereo, s16, 139 kb/s Metadata: LANGUAGE : eng encoder : Lavc57.89.100 libfdk_aac size= 5395kB time=00:05:13.03 bitrate= 141.2kbits/s speed=30.8x video:0kB audio:5337kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.089336% BigMac:~ munim$ ls Guns* Guns N' Roses - Don't Cry-zRIbf6JqkNc.opus DontCry.m4a |
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