[gst-devel] Files created with lamemp3enc does not show correct values (at least) for length and bitrate.

[Yogesh Marwaha]

Ok. Thank you very much.

2010/5/4 Sebastian Dröge <sebastian.droege at collabora.co.uk>:
> On Tue, 2010-05-04 at 10:52 +0530, Yogesh Marwaha wrote:
>> Hi,
>>
>> I had posted a bug report
>> (https://bugzilla.gnome.org/show_bug.cgi?id=617545) with following
>> content: -
>>
>> -------------------------------------
>> Using 'lame' element (which is deprecated, as per documentation) everything
>> seems fine but when 'lamemp3enc' is used files so created does not show correct
>> values for length and bitrate, though it plays fine.
>>
>> Here are the examples: -
>>
>> gst-launch -v cdda://1 ! audioconvert ! lame ! filesink location=track.mp3
>> gst-launch -v cdda://1 ! audioconvert ! lamemp3enc ! filesink
>> location=track.mp3
>>
>> Using lame: length: 285; bitrate:128; size:4.4 MiB
>> Using lamemp3enc: length: 1054; bitrate:32; size:4.0 MiB
>>
>>
>> gstreamer version: 0.10.29
>> gstreamer-ugly version: 0.10.14
>> I'm on openSUSE 11.2 32-bit
>> -----------------------------------
>>
>> ...and later I came to know (courtesy: Sebastian Dröge) that it is not
>> a bug and "You have to add the xingmux element after lamemp3enc (or
>> lame) if encoding in
>> variable bitrate mode. Otherwise the length can't be estimated properly."
>>
>> ...and I thought that I should follow-up on this mailing list to get
>> answer to my question, so I'm here.
>>
>> The question is: If I want to use id3v2mux, even then do I need to use xingmux?
>
> Yes, xingmux adds a seek table, bitrate and duration information to the
> MP3 file while id3v2mux adds tags (like artist, title) to the file.
>
> The pipeline should be something like
> ... ! lamemp3enc ! xingmux ! id3v2mux ! filesink
>
> (Note: You can create constant bitrate files with lamemp3enc too if you
> really want that. Use the "target", "cbr" and "bitrate" properties for
> that. CBR files will have lower quality though)
>
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>
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-- 
Yogesh M
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