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mp3 bitrate vlc

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mp3 bitrate vlc

geon
Hi,

with version - FFmpeg version SVN-r22048, Copyright (c) 2000-2010 the
FFmpeg developers  built on Feb 25 2010 17:20:36 with gcc 4.3.3 - was
this issue ok - vlc player showed bitrate correctly.

Now vlc shows bitrate 56kbps even if the ffmpeg runs with 128:

C:\prg\ffmpeg\bin>ffmpeg.exe -y -i in.mp3 -ab 128k out.mp3
ffmpeg version git-N-30155-g01a73d6, Copyright (c) 2000-2011 the FFmpeg
develope
rs
  built on May 23 2011 03:43:18 with gcc 4.5.3
  configuration: --enable-gpl --enable-version3 --enable-memalign-hack
--enable-
runtime-cpudetect --enable-avisynth --enable-bzlib --enable-frei0r
--enable-libo
pencore-amrnb --enable-libopencore-amrwb --enable-libfreetype
--enable-libgsm --
enable-libmp3lame --enable-libopenjpeg --enable-librtmp
--enable-libschroedinger
 --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libvpx
--enabl
e-libx264 --enable-libxavs --enable-libxvid --enable-zlib
--pkg-config=pkg-confi
g
  libavutil    51.  2. 1 / 51.  2. 1
  libavcodec   53.  6. 0 / 53.  6. 0
  libavformat  53.  2. 0 / 53.  2. 0
  libavdevice  53.  0. 0 / 53.  0. 0
  libavfilter   2. 10. 0 /  2. 10. 0
  libswscale    0. 14. 0 /  0. 14. 0
  libpostproc  51.  2. 0 / 51.  2. 0
[mp3 @ 01EA53C0] max_analyze_duration 5000000 reached at 5016000
Input #0, mp3, from 'in.mp3':
  Metadata:
    album           : The Very Best
    date            : 2001
    track           : 7
  Duration: 00:02:17.08, start: 0.000000, bitrate: 320 kb/s
    Stream #0.0: Audio: mp3, 48000 Hz, stereo, s16, 320 kb/s
Output #0, mp3, to 'out.mp3':
  Metadata:
    TALB            : The Very Best
    TDRL            : 2001
    TRCK            : 7
    TSSE            : Lavf53.2.0
    Stream #0.0: Audio: libmp3lame, 48000 Hz, stereo, s16, 128 kb/s
Stream mapping:
  Stream #0.0 -> #0.0
Press [q] to stop, [?] for help
[mp3 @ 01EA5940] Header missingrate= 128.0kbits/s
Error while decoding stream #0.0
size=    2143kB time=137.11 bitrate= 128.0kbits/s
video:0kB audio:2142kB global headers:0kB muxing overhead 0.019191%


Is it a bug or do I miss something?
Thank you
PK



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Re: mp3 bitrate vlc

Andrew Berg
On 2011.05.24 11:22 PM, [hidden email] wrote:
> Now vlc shows bitrate 56kbps even if the ffmpeg runs with 128:
VLC could be wrong (in which case, you should report the bug to them).
What does MediaInfo say?
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Re: mp3 bitrate vlc

geon
Andrew Berg napsal(a), dne 25.5.2011 6:35:
> On 2011.05.24 11:22 PM, [hidden email] wrote:
>> Now vlc shows bitrate 56kbps even if the ffmpeg runs with 128:
> VLC could be wrong (in which case, you should report the bug to them).
> What does MediaInfo say?


MediaInfo shows 128k surprisingly ...

It could point that wrong is vlc but  anyway  something must happened to
ffmpeg if the previous version works  fine.

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Re: mp3 bitrate vlc

bat guano



----------------------------------------

> Date: Wed, 25 May 2011 06:40:04 +0200
> From: [hidden email]
> To: [hidden email]
> Subject: Re: [FFmpeg-user] mp3 bitrate vlc
>
> Andrew Berg napsal(a), dne 25.5.2011 6:35:
> > On 2011.05.24 11:22 PM, [hidden email] wrote:
> >> Now vlc shows bitrate 56kbps even if the ffmpeg runs with 128:
> > VLC could be wrong (in which case, you should report the bug to them).
> > What does MediaInfo say?
>
>
> MediaInfo shows 128k surprisingly ...
>
> It could point that wrong is vlc but anyway something must happened to
> ffmpeg if the previous version works fine.
>
>
Hi
While mp3 file is playing in VLC.
Look in Tools > Codec Information > Statistics
It will probably show 'Content bitrate 128Kb/s'.
Even though in Tools > Codec Information > Codec Details
It will probably show 'Bitrate 56kb/s'.

I don't know whether VLC is to blame or whether it's a bug with FFmpeg.
     
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