![]() I'm using eac3to to convert aac to ac3, and struggling to understanding the delay issue. Then, to avoid problems, you can use eac3to to extract and Qaac or ffmpeg to decode (or LWLibavAudioSource inside AviSynth). eac3to works fine extracting AAC from MKV/TS/M2TS containers, I obtain the same aac than I muxed previously. m4a, put the correct delay to compensate and can be decoded without problems with NeroAacDec, Qaac or ffmpeg. The encoder NeroAacEnc.exe, user by eac3to to encode. aac, cut the first 1024 samples (21,333 ms in 48 KHz) in 2.0 and is broken for 5.1. The directshow Nero 7 decoder, used by eac3to to decode. We can open a new thread to speak about AAC and muxer/demuxer's (Mp4Muxer/Mp4Box/MkvToolnix/tsMuxeR), but the relevant questions for this thread are clear:
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