CODEWITHSUNDEEP
cffmpeglibavformat
serg66
serg66

Reputation: 1148

How to get a string representation of an audio AVStream in ffmpeg?

I'm using ffmpeg. Consider the following piece of code:

for(i=0; i<pFormatCtx->nb_streams; i++) {
        if (pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO) {
            //how do I get the language of the stream?          
        }
}

I found out that there is a LangEntry struct in libavformat (avlanguage file), there's also a table containing languages and their codes, seems it's just what I need. But I don't know how to use it. I couldn't find any examples of its usage. There are no reference to the LangEntry neither in AVStream, nor in AVCodecContext.

Upvotes: 1

Views: 1286

Answers (1)

ARK
ARK

Reputation: 699

The LangEntry has nothing to do with your objective of detecting the language.
In fact, LangEntry table is to do with List of ISO 639-2 codes

Language code gets encoded as metadata, so you should be trying as below to identify the language

AVDictionaryEntry *lang;  
for(i=0; i<pFormatCtx->nb_streams; i++) 
{
    if (pFormatCtx->streams[i]->codec->codec_type==AVMEDIA_TYPE_AUDIO) 
    {
       lang = av_dict_get(pFormatCtx->streams[i]->metadata, "language", NULL,0);
       // Check lang->value, it should give 3-letter word matching to one of the LangEntry Table
    }
}

Upvotes: 1

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