The reason is that some tv-channels here use HE-AAC so recorded (or streamed live with dvblink or similar) programs doesn’t get audio. Video is fine but kind of pointless without the audio…
The manual says it supports LC / HE in MKV, ADTS, ADIF, Quicktime (MOV/MP4) containers only.
Really? Some TV Channels are broadcasting in an Apple-proprietary format?
Don’t think it is Apple-proprietary. It is part of the MPEG-4 standards. According to the Wikipedia article linked by the OP it is used for Digital Radio and TV in various parts of the world.
However, you are right in that mpegts is not one of the supported containers for HE-AAC.
Just to test, I’ll remux it to an mkv and see how it goes.
I don’t know. It is just the way this category of devices work. They only support certain codec/container combinations.
If you want to see something more ridiculous look at the network connected TVs. A lot of them will only play certain codec/container combinations from an attached USB device. Network playback is ususally limited to mpeg2 or very limited options with avi. Now of course they claim to play all sorts of codecs/containers, even with all the certification logos on their packaging. It is not until you dig through their manuals that you find all the restrictions.
A ts file with one HE-AAC audio stream and one h.264 video stream, audio and video is played ok.
A ts file with three audio streams where one is AC3 and 2 are HE-AAC, only the AC3 streams give audio ouptut, the HE-AAC ones can be choosen but results in silence. Video is ok.
The HE-AAC streams in the two cases are identical, only a remux has been done, not any reencoding.