Vidcoder, reducing bitrate results in larger audio stream. How?

[bizzybody]

I wanted to hit a target size for a video, and to give more room for the video data I kept the same codec, AAC, but reduced the bitrate from 48Khz to 44.1Khz. The resultant audio stream is bigger than the original. For a stereo stream around 45 meg at 48Khz the 44.1Khz output was around 57 meg while a 48Khz mono stream at just over 12 meg ballooned up to over 29 meg, and yes, I checked to make sure it's still mono.

With less data per second, other settings being the same, the output should be smaller than the original.

Of course the worst part of this is I'll need to start over from the beginning, either leaving the original audio untouched, or figuring out how to get the *expected result* of fewer audio bits per second actually producing less data.

I only twigged to this when I muxed one of the 44.1Khz mono streams into a video to replace the original stream and saw the new video file was bigger than before.

When you're seeing video files come out of the digital sausage machine at the requested size, and they look good enough, you don't think that the recipe is being altered in unexpected ways.

[poisondeathray]

I wanted to hit a target size for a video, and to give more room for the video data I kept the same codec, AAC, but reduced the bitrate from 48Khz to 44.1Khz. The resultant audio stream is bigger than the original. For a stereo stream around 45 meg at 48Khz the 44.1Khz output was around 57 meg while a 48Khz mono stream at just over 12 meg ballooned up to over 29 meg, and yes, I checked to make sure it's still mono.

With less data per second, other settings being the same, the output should be smaller than the original.

Of course the worst part of this is I'll need to start over from the beginning, either leaving the original audio untouched, or figuring out how to get the *expected result* of fewer audio bits per second actually producing less data.

I only twigged to this when I muxed one of the 44.1Khz mono streams into a video to replace the original stream and saw the new video file was bigger than before.

When you're seeing video files come out of the digital sausage machine at the requested size, and they look good enough, you don't think that the recipe is being altered in unexpected ways.

Khz represents frequency, not bitrate

Look for something like kb/s or kbps (kilobits per second) for bitrate

[bizzybody]

Media info before

Audio #1
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC-2
Duration : 48 min 12 s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 kHz
Frame rate : 46.875 FPS (1024 SPF)
Compression mode : Lossy
Delay relative to video : -21 ms
Title : Stereo
Language : English
Default : Yes
Forced : No
Statistics Tags Issue : mkvmerge v20.0.0 ('I Am The Sun') 64-bit 2018-02-27 00:30:36 / mkvmerge v20.0.0 ('I Am The Sun') 64-bit 2018-02-27 00:30:36 / UTC 2016-06-15T20:42:11Z
FromStats_BitRate : 128139
FromStats_Duration : 00:48:12.159000000
FromStats_FrameCount : 135570
FromStats_StreamSize : 46324796

Media Info after. Note that Vidcoder doesn't include some of the data that was there originally.

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : A_AAC-2
Duration : 48 min 12 s
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Delay relative to video : -23 ms
Title : Stereo
Language : English
Default : Yes
Forced : No