Skip to main content ↑ ↓

Notice

Please note that most of the software linked on this forum is likely to be safe to use. If you are unsure, feel free to ask in the relevant topics, or send a private message to an administrator or moderator. To help curb the problems of false positives, or in the event that you do find actual malware, you can contribute through the article linked here.
Topic: Getting LAME VBR histogram from external process (Read 3166 times) previous topic - next topic
0 Members and 1 Guest are viewing this topic.

Getting LAME VBR histogram from external process

Can anyone give an idea how an external application (frontend) can get vbr histogram values while lame encoding stdin?

Getting LAME VBR histogram from external process

Reply #1 –
Well. LAME developers, don't you want to tell me? Sorry if my question is not clear... So, I'll try to ask more specifically. Is there in lame.exe code something like file mapping object or something else to access encoding statistics frome another process during _encoding_of_the_<STDIN>?

Getting LAME VBR histogram from external process

Reply #2 –
if you don't get an answer here or from lame developers in general you could try asking the developer of razorlame.  That program accesses the vbr histogram.
 

Getting LAME VBR histogram from external process

Reply #3 –
...and since the source-code to razorlame is available, you can see the code he uses.

Getting LAME VBR histogram from external process

Reply #4 –
You have to grab stdout.
That is how RazorLame is doing it (this has already been discussed here)

Getting LAME VBR histogram from external process

Reply #5 –
I know about razorlame, and I saw its source. And I know that  they use pipe to read STDOUT of lame console during encoding (and then they seek for histogram bars in the buffer to "decode" it to the values). Very good! But when you'll try to encode STDIN (say some stream) with VBR option there will be NO VBR HISTOGRAM in the lame console - you may see yourself. Hence razorlame's method seems to be useless here. That is the question...

Getting LAME VBR histogram from external process

Reply #6 –
Is this at all related to the problem I'm having with mp3s not getting lame tags when encoding an stdin source? I'm using LAME 3.90.2 (dibrom) and Speek's Multi-frontend with Oggdec and Mppdec as sources. Oh, and guys - transcoding ist death, but that isn't the issue here

edit: actually, i'd like to withdraw a lot of this - it seems to be something to do with mppdec.