[FFmpeg-user] Mapping audio from DV25 to MPEG2

James Anderson JamesAnderson at NWCT.ORG
Mon Jun 18 03:18:02 CEST 2012

Is it possible to map both mono streams to the output file as either two mono steams or a stereo pair? I'm only able to map one channel at a time, I'm not sure what I'm doing wrong.

Any help would be much appreciated.


On Jun 17, 2012, at 3:00 PM, "Carl Eugen Hoyos" <cehoyos at ag.or.at> wrote:

> James Anderson <JamesAnderson <at> NWCT.ORG> writes:
>> The input file has two audio channels
> No, it contains two mono streams;-(
>> , but the output file is mono with only one of the audio 
>> source audio channels. I've tried mapping using -map. I 
>> can map each stream, but I can only get one to show up 
>> at a time. Do I need to use map_channel? It's not clear 
>> to me how to configure the map_channel.
> The map_channel documentation on http://ffmpeg.org/ffmpeg.html 
> answers your question, please tell us if you don't find it 
> helpful.
> [...]
>> Here's the output from FFMPEG:
>> Please use -b:a or -b:v, -b is ambiguous
> Unfortunately, you did not add (complete) FFmpeg output.
> For future questions, please always add complete, 
> uncut console output together with your command line.
> Carl Eugen
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