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Old 13th June 2016, 21:02   #1  |  Link
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Join Date: Jun 2007
Location: Ann Arbor, MI
Posts: 114
.jpg + .mp3 one length as .avs another after ffmpeg produces file

I have been putting audio behind .jpg's for years. I just started using .mp3 for the audio and am getting results I don't understand. I produce the .avs file and AVIsynth 2.6 with:
vd = DirectShowSource("Slide7.mp3", fps = 15, convertfps = True)
vd = vd.ssrc(22050)
sld7 = AudioDub(fv,vd)
It plays for 16.5 seconds and stops like it should. Then I create the .flv file using the latest version of ffmpeg with:
ffmpeg -async 15 -i Slide7.avs -vcodec flv -r 15 -s 800x450 -b:v 512k -ab 96k -ar 22050 -coder 1 -flags +aic+loop+mv4+naq -mpv_flags +cbp_rd -trellis 1 Slide7.flv
But the .flv 29 seconds! What is going on?... how do I fix?
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audio encoding, avisynth, ffmpeg

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