ffmpeg.exe -y -f s16le -ar 44.1k -ac 8 -i "%TEMPPATH%.aif" -map_channel 0.0.0 -b:a 48k -c:a libfdk_aac -profile:a aac_he "%TEMPPATH%_0.aac" -map_channel 0.0.1 -b:a 48k -c:a libfdk_aac -profile:a aac_he "%TEMPPATH%_1.aac" -map_channel 0.0.2 -c:a libfdk_aac -profile:a aac_he "%TEMPPATH%_2.aac" -map_channel 0.0.3 -b:a 48k -c:a libfdk_aac -profile:a aac_he "%TEMPPATH%_3.aac" -map_channel 0.0.4 -b:a 48k -c:a libfdk_aac -profile:a aac_he "%TEMPPATH%_4.aac" -map_channel 0.0.5 -b:a 48k -c:a libfdk_aac -profile:a aac_he "%TEMPPATH%_5.aac" -map_channel 0.0.6 -b:a 48k -c:a libfdk_aac -profile:a aac_he "%TEMPPATH%_6.aac" -map_channel 0.0.7 -b:a 48k -c:a libfdk_aac -profile:a aac_he "%TEMPPATH%_7.aac" >"%TEMPPATH%_log_encode.txt" 2>&1