Audacity Forum

... and that also works just fine. I will have to look into the Audacity code little more closely maybe we are sending a badly formatted string to FFmpeg.

Edgar wrote:

Gale Andrews wrote: what happens?

Seems to work fine (note however that the sample rate is 41,800 not 48,000)

Sorry I am not seeing where the "41,800" occurs. Your input "a.wav" and output "mp2.wav" both seem to be 44100 Hz.


Gale

what happens? Seems to work fine (note however that the sample rate is 41,800 not 48,000): D:AudacityFFmpeg for Audacity>ffmpeg -i a.wav -acodec mp2 -ab 256000 mp2.wav FFmpeg version 0.6.2, Copyright (c) 2000-2010 the FFmpeg developers built on Apr 4 2011 10:07:47 with gcc 4.5.2 configuration: ...

I don't know why our results are different Ed , the only difference seems to be that I have FFmpeg installed in the standard location. Do I take it normal export to AAC in Audacity is OK? If you have a file called "a.wav" in D:AudacityFFmpeg for Audacity then ...

... to the maximum iTunes bit rate. I can add a vote for lucid79 that the Audacity AAC encoder should be expressed in target bit rates, but since FFmpeg exposes a quality control and not bit rate targets, it would need a lot of thought and possibly be misleading. It would not be directly comparable ...

AAC encoding for Audacity exporting is provided by the optional FFMpeg library. The exact bit-rate and other encoder options are determined by FFMpeg (which may vary between FFMpeg versions). For more control over AAC encoding options you could try converting with QuickTime or iTunes.

FFmpeg 0.6.2. Is that the version you are using? edgar "I seem to be using 0.6.2": D:AudacityFFmpeg for Audacity>ffmpe FFmpeg version 0.6.2, Copyright (c) 2 built on Apr 4 2011 10:07:47 with configuration: --disable-ffplay ...

However I can export a valid file using your steps (30 seconds mono or stereo tone) and FFmpeg 0.6.2. Is that the version you are using? I just tried again with a 30 sec Chirp and failed with a zero length file (I entered zero as the tooltip suggested). 10:36:37: Audacity ...

... so make a patch if you want. However I can export a valid file using your steps (30 seconds mono or stereo tone) and FFmpeg 0.6.2. Is that the version you are using? What happens if you use (external program) and: ffmpeg -i - -acodec mp2 -ab 256000 "%f" That ...

... from the File menu ___2a) make sure that you are Saving in: a directory in which you have write permission 3) Under Save as type: select Custom FFmpeg Export 4) Choose Options… , the Specify Other Options dialog opens 5) In the left-hand column of Formats choose wav 6) In the right-hand column ...