To "put together" or find a Dolby Digital Plus (E-AC-3) test file repack, you can access curated collections of official and community-sourced audio streams. These files are typically used to verify multi-channel setups (5.1 or 7.1) and Dolby Atmos functionality across different hardware. Recommended Sources for Test Files
If you have downloaded a "DD+ Test File Repack," here is how to use it effectively for calibration: dolby digital plus test file repack
Legacy Support: Some systems "repackage" E-AC3 into standard Dolby Digital (AC3) at 640 kbps to ensure playback on older A/V receivers. To "put together" or find a Dolby Digital
Most of these files originate from Dolby's Professional Developer tools or official demo discs given to retailers. Because the original files are often in raw formats, community members repackage them for easier use on consumer devices. Most of these files originate from Dolby's Professional
No Transcoding: A true "repack" should never re-encode the audio; it simply changes the "wrapper" to preserve original quality.
MediaInfo: Run your repacked file through MediaInfo (text mode).
ffmpeg -f ec3 -i raw_ddp.ec3 -c copy -strict unofficial dolby_vision_test.mp4