I was converting flac audio to aac_lc with libfdk_aac with VBR encoding. But I saw a message about VBR encoding.
The command and output of the command is as follows : Command : ffmpeg.exe -i input.flac -c:a libfdk_aac -afterburner 1 -frame_length 1024 -cutoff 0 -vbr 5 -profile:a aac_low output.m4a° Output : F:\DSDA-Doom>ffmpeg.exe -i input.flac -c:a libfdk_aac -afterburner 1 -cutoff 0 -frame_length 1024 -profile:a aac_low -vbr 5 output.m4a ffmpeg version N-115010-ga2cdb2f5be Copyright (c) 2000-2024 the FFmpeg developers built with gcc 13.2.0 (Rev6, Built by MSYS2 project) configuration: --pkg-config=pkgconf --cc='ccache gcc' --cxx='ccache g++' --ld='ccache g++' --extra-cxxflags=-fpermissive --extra-cflags=-Wno-int-conversion --disable-autodetect --enable-libopus --enable-libvorbis --enable-libx264 --enable-libx265 --enable-libaom --disable-debug --enable-libfdk-aac --enable-schannel --enable-gpl --enable-nonfree libavutil 59. 16.101 / 59. 16.101 libavcodec 61. 5.103 / 61. 5.103 libavformat 61. 3.103 / 61. 3.103 libavdevice 61. 2.100 / 61. 2.100 libavfilter 10. 2.101 / 10. 2.101 libswscale 8. 2.100 / 8. 2.100 libswresample 5. 2.100 / 5. 2.100 libpostproc 58. 2.100 / 58. 2.100 Input #0, flac, from 'input.flac': Metadata: encoder : Lavf61.3.103 Duration: 02:05:52.13, start: 0.000000, bitrate: 621 kb/s Stream #0:0: Audio: flac, 48000 Hz, stereo, s16 Stream mapping: Stream #0:0 -> #0:0 (flac (native) -> aac (libfdk_aac)) Press [q] to stop, [?] for help [libfdk_aac @ 000001b9623d7400] *Note, the VBR setting is unsupported and only works with some parameter combinations* Output #0, ipod, to 'output.m4a': Metadata: encoder : Lavf61.3.103 Stream #0:0: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, s16 Metadata: encoder : Lavc61.5.103 libfdk_aac [out#0/ipod @ 000001b962402280] video:0KiB audio:229238KiB subtitle:0KiB other streams:0KiB global headers:0KiB muxing overhead: 0.605099% size= 230625KiB time=02:05:52.13 bitrate= 250.2kbits/s speed=18.1x F:\DSDA-Doom>pause Press any key to continue . . . So, may I know what's wrong with VBR to the point its unsupported ? Is it going to be removed in the future from the encoder ? Is it considered experimental or stable ? Please tell me about this 🙏 Thanks _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".