I’m attempting to generate a downloadable HDR10 with 5.1 surround deliverable to put on a website of a concert I worked on. Ideally with maximum compatibility with things like QuickTime & Plex.
I have a source 2160p29.97 10-bit PQ HDR DNxHR video file, and a source Dolby AC-3 5.1 audio encode. The AC3 encode was created with Dolby Media Encoder using a 6ch .wav that had also been exported from Resolve. I’m not sure if the timecode for that was handled correctly.
Here’s my ffmpeg string:
ffmpeg.exe .master-dnx.mov -i .master-ac3.ac3 -acodec copy -c:v libx265 -x265-params "colorprim=bt2020:transfer=smpte2084:colormatrix=bt2020nc:range=limited:repeat-headers=1:master-display=G(13250,34500)B(7500,3000)R(34000,16000)WP(15635,16450)L(10000000,1):max-cll=1000,300:open-gop=0:hdr10-opt=1" -profile:v main10 -pix_fmt yuv420p10le -crf 22 -tag:v hvc1 -preset faster -movflags +faststart -f mp4 hdr-download.mp4
The issues:
- Playback starts fine but QuickTime seems to have trouble seeking in the file, often leading to the audio & video being out of sync or dropping entirely after seeking. Not an issue in MPV.
- The audio drops out a few seconds early at the end of the file.
I have noticed the following warnings from ffmpeg:
- Estimating duration from bitrate, this may be inaccurate
- [mp4 @ 00000257d7257600] track 1: codec frame size is not set
- [mp4 @ 00000257d7257600] Dropping invalid packet from start of the stream
I feel there may be some kind of timestamp mismatch. This is my first time attempting to mux AC3 audio into a video this way.
Thanks so much for any help.
