Here’s How-to Play MKV and AVI Files with Unsupported Audio Format on Your TV.
My HD-Television plays videos directly from USB drives. Everything was going fine until I loaded a 720p MKV file and found that the TV couldn’t recognize the audio codec. The audio was missing but the video was playing alright and a message appeared on screen saying that the audio format was not supported. My tv couldn’t play DTS encoded audio but it could handle Dolby Digital AC-3 and AAC audio! A quick search on Google revealed that certain models of HD-TV like my own have similar issues with audio codecs.
The solution when a video file refuses to play on a device is to convert the file into a format that is supported by the device. However, in this case, re-encoding the video file into another format, this is not necessary because the TV is incompatible with only the audio stream, and re-encoding the video stream will not only be a waste of time but will also result in video quality that is worse than the original since all video conversions are lossy. All what we need to do is convert the audio stream while keeping the video stream intact. This we can do with a software called PopCorn MKV AudioConverter or another one which called Avidemux.
1. – PopCorn MKV AudioConverter is a Matroska MKV DTS to MKV AC3 converter. It can also remove DTS tracks and convert OGG audio to AC3,MP3,AAC,MP3. It requires a lots of external tools but AudioConverter will download them automatically (more or less ~12MB). Current version is: v1.87.4, Release Date: 23 August 2012.
Tutorial for converting MKV audio tracks with PopCorn MKV Audio Converter – Read View all guides with guide description here