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</o:shapelayout></xml><![endif]--></head><body lang=SV link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span lang=EN-US>I have a transport stream file containing several services using MPEG1 and HE-AAC audio. I can play back the file using ffplay, even though I get some warnings and errors at the command prompt (probably because the TS was recorded straight from a TV transmission). I use the –vst and –ast parameters to make sure what PIDs to play.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>The ffprobe application will report the audio streams as being aac_latm (in parallel with mp1) and I have configured my own application (that can play MPEG1, MPEG2 and regular AAC audio just fine, no problem at all) to use the AV_CODEC_ID_AAC_LATM to decode the HE-AAC streams. I get no errors during initialization, but I get lots of “frame length mismatch” messages, some “envelope scalefactor overflow in dequant” messages and sometimes also some “is not implemented” ones while decoding the frames with avcodec_decode_audio4(). I use FFmpeg release 2.1.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I realize it’s my own fault and probably has something to do with initialization, but I can’t figure out what it is. Is there for instance some av_opt_set_int() call or something similar that must be made in order to play back HE-AAC, as opposed to how everything is initialized when playing back MPEG1, MPEG2 or AAC audio?<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks for your help!<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Mathias<o:p></o:p></span></p></div></body></html>