On Sat, 19 Mar 2011 00:06:23 +0000, you wrote: >Looking back at my script I wrote back at Christmas when the iphone >option stopped working and my programs started coming down in aac I seem >to have a faster solution which works for me; > >time( ffmpeg -i You_and_Yours_-_16_03_2011_b00zf33w_default.aac >-map_meta_data >You_and_Yours_-_16_03_2011_b00zf33w_default.mp3:You_and_Yours_-_16_03_2011_b00zf33w_default.aac > >You_and_Yours_-_16_03_2011_b00zf33w_default.mp3) > >real 2m4.772s >user 2m2.440s >sys 0m1.580s >
it is faster than std ffmpeg + lame b 128 but the output file is half the size (bitrate is 64 instead of 128 kb/s) using lame -b 64 is 6 secs slower than your method - 8%? (encoding a 21 minute aac) JC ============================================ Std: -------------------------------------- FFmpeg version git-c9e16a9-Sherpya, Copyright (c) 2000-2011 the FFmpeg developer LAME 3.98.2 32bits (http://www.mp3dev.org/) Using polyphase lowpass filter, transition band: 16538 Hz - 17071 Hz Encoding <stdin> to Adam_Dalgliesh_-_A_Taste_for_Death_-_Episode_5_b00tb9n1_default.partial .aac.ffmpeg.new.mp3 Encoding as 44.1 kHz j-stereo MPEG-1 Layer III (11x) 128 kbps qval=3 real 1m49.862s user 1m47.266s sys 0m0.497s -------------------------------------- Without lame pipe: -------------------------------------- FFmpeg version git-c9e16a9-Sherpya, Copyright (c) 2000-2011 the FFmpeg developer : Output #0, mp3, to 'Adam_Dalgliesh_-_A_Taste_for_Death_-_Episode_5_b00tb9n1_defa ult.partial.ffmpeg.new.wolame.mp3': Metadata: TSSE : Lavf52.95.0 Stream #0.0: Audio: libmp3lame, 44100 Hz, stereo, s16, 64 kb/s Stream mapping: Stream #0.0 -> #0.0 Press [q] to stop encoding size= 9845kB time=1260.09 bitrate= 64.0kbits/s video:0kB audio:9844kB global headers:0kB muxing overhead 0.000327% real 1m19.481s user 0m0.000s sys 0m0.062s -------------------------------------- With lame -b 64 i get : LAME 3.98.2 32bits (http://www.mp3dev.org/) Resampling: input 44.1 kHz output 24 kHz Using polyphase lowpass filter, transition band: 10935 Hz - 11226 Hz Encoding <stdin> to Adam_Dalgliesh_-_A_Taste_for_Death_-_Episode_5_b00tb9n1_default.partial .aac.ffmpeg.new.mp3 Encoding as 24 kHz j-stereo MPEG-2 Layer III (12x) 64 kbps qval=3 real 1m25.357s user 1m19.810s sys 0m0.622s _______________________________________________ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
