Indexing and search of content in recorded group communications

In one embodiment, indexing content in streamed data includes receiving streams of audio data encoding a recording of a live ongoing group communication, where each stream of audio data encodes a different one of multiple voices. Each of the streams of audio data is provided to a recognizer to cause separate recognition of words in each of the streams. The recognized words are indexed to corresponding locations in each of the streams, and the streams are combined into a combined stream of audio data by synchronizing at least one common location in the streams. Embodiments allow accurate recognition of speech in group communications in which multiple speakers have simultaneously spoken, and accurate search of content encoded and processed from such speech.