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Hello,

I am trying to do a command line convert from a .ogg file to a .mp3 file. Here is my command line:

vlc -I dummy 0.ogg --sout=#transcode{acodec=mp3,channels=2,samplerate=44100}:standard{access=file,mux=raw,dst=0.mp3}

I am getting the following error:

main stream out error: Failed to create audio filter
stream_out_transcode stream out error: Failed to find conversion filter for resampling
stream_out_transcode stream out error: cannot create audio chain
main decoder error: cannot create packetizer output (vorb)

Remove samplerate part.

Hey VLC_help,

That worked! Is there a way to know which arguments (channels, samplerate) are available to each "acodec" ?

For example, which arguments are available if I choose acodec=s161, acodec=mp3?

Or are the same arguments available to each one, regardless of acodec ?

Samplerate and channels should work with all output codecs, but not all values of them will work (and some files might be unresampable <-- I don't know if that is a valid English word).

I am attempting to do this and encountering an error:
What am I doing wrong? Did something change?

Dave

Hi Dave,

Add quotation marks to the transcode chain descriptor so you shell is not confused on how to interpret it. You also might want to change the `raw` muxer to `mp3` to have a proper mpeg container and add `vlc://quit` as a second input to automatically close vlc when the transcoding is done:

Hi Dave,

Add quotation marks to the transcode chain descriptor so you shell is not confused on how to interpret it. You also might want to change the `raw` muxer to `mp3` to have a proper mpeg container and add `vlc://quit` as a second input to automatically close vlc when the transcoding is done:

Code: Select all

vlc -I dummy The_Ultimate_Collection.ogg --sout="#transcode{acodec=mp3,channels=2}:standard{access=file,mux=mp3,dst=The_Ultimate_Collection.mp3}" vlc://quit

Thank you for the speedy reply. I am running this as I reply.

How smart is the transcode from ogg to mp3? I would hope that it is doing a VBR CD quality transcode to match the ogg input.

Dave

Follow up to above. I did a little further checking and found the following:

Note: If you try to create mp3 files it probably won't use the best compression techniques! A better alternative is to use the LAME MP3 encoder.

I have lame available, so I would like to pipe the output from vlc to lame for better encoding. How can I accomplish this? It is not as simple as:

cvlc %input_file% | lame -V 2 -Y -b 96 - %output_file%

I tried this and the input file started to play via the speakers on my laptop.

Dave

PS: I tried adding --sout="#std{access=file,mux=wav,dst=-}" and had to ^C an endless repetition of "file access out error: cannot write: Resource temporarily unavailable"