![]() ![]() The issue with codec ID is, I suspect, a failing of ffmpeg to fully support Atmos, and perhaps also eac3. That's why I suggested it to you, as your original script WAS re-encoding. I was surprised to learn it re-encodes Audio.Ĭodec "copy" does just that, copy. I just wanted to copy the Video/Audio from. I thought MKV & MP4 were just containers, like a. I’m guessing Track 1 is the Audio and I suspect its not able to re encode correctly. I also get this error “ track 1: codec frame size is not set” ![]() Ok, so certainly an improvement, I now see JOC and Atmos mentioned in the Format and Commercial name. I do wonder if we have remuxed the the Audio stream containing all the JOC data, but the container isn't marked as Dolby digital plus with Atom (with JOC)įfmpeg -i original.mkv -c:v copy -c:a copy output.mp4 The JOC markings have been removed with FFmpeg. I've also remuxed an MKV to MKV and able to see the same result. The remux operation finished in about 1 minute for a 8Gb 4k video file, so I know there is no reencoding going on. MKV contains only 1 video and 1 audio track)įormat/Info: Enhanced AC-3 with Joint Object CodingĬommercial name: Dolby Digital Plus with Dolby Atmos The mediainfo tool reports Dolby Digital Plus with JOC for the MKV and Dolby Digital Plus without JOC for MP4.įfmpeg -i original.mkv -c:v copy -c:a eac3 -tag:v hvc1 output.mp4 From what I understand MP4\M4V supports Atmos This contains the Atmos information for object based sound. The issue is retaining the Dolby Digital Plus including JOC. I have achieved the ability to remux 4K HDR with Dolby Digital Plus in a. It's important not to convert, but to remux. I'm remuxing a number of video files from MKV to MP4\M4V so they play on the Apple platform (including the TV App). Does anyone know how to remux and keep enhanced AC-3 with joint object control (JOC) with FFmpeg. ![]()
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