FFmpeg(6)-通过av_find_best_stream()来获取音视流的索引

也可以通过av_find_best_stream()函数来获取流的索引:

例:

    audioStream = av_find_best_stream(ic, AVMEDIA_TYPE_AUDIO, -, -, NULL, );
LOGI("av_find_best_stream, audio index is: %d", audioStream);
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