I have a question regarding cutting together Depthkit recordings. We had already written by mail regarding this:
"Another question (does this work?): Is it possible to edit the mp4-files with multiple cuts to add different cello-recordings together? We are thinking about fast cuts where the cellist sits and stands and turns around etc.
→ You can definitely add multiple cuts together into a single MP4 file, assuming that you do not change the volume boundaries so that the metadata is the same for each sequence that is spliced together."
The problem now: When I load the PlugIn with the edited video and test the project on the smartphone, I notice that only the sound of the video is played, but the video itself is invisible.
Do you have any idea what could be the reason for this?
@FelixKnoblauch There are a number of reasons that the edited clip is not rendering on the device (e.g. the exported edited video has different values in some of its metadata tags than the original video). Is it possible to share both the original video and metadata, as well as the edited version so that we can take a look and compare them?
@FelixKnoblauch - I took a look at both videos in ffprobe to compare, and spotted these differences (working “Depthkit” version above, not-working “Resolve” version below):
The Depthkit version has the H.264 Main profile applied; The Resolve version has the H.264 High profile applied at encode/export. The High profile might not be supported by your player or playback device.
The Depthkit version has PC (aka Full-Range) color applied; The Resolve version has TV (aka Limited) color applied. We recommend adhering H.264 videos to PC color, and even injecting additional colorspace metadata to ensure that the hue-encoded depth is interpreted properly, avoiding distortion in the geometry at render time.
The Depthkit version has a resolution of 4092x4096; The Resolve version has a resolution of 3840x2160. You can either re-export at a matching resolution, or change the Resolve version’s metadata to match the new resolution.
The Resolve version, in addition to the video and audio streams, contains a 3rd stream for metadata (e.g. timecode) which may not be supported by your player. It may be possible to re-export out of Resolve without this stream added. If not, you can try muxing just the video and audio streams into a new container without the metadata stream.
@FelixKnoblauch - Per your DM, I am adding some additional information here:
Different playback devices (e.g. Windows computers vs. mobile devices) and players (e.g. Unity Video Player vs. AVPro) have different requirements, so there isn’t one set of encoding setting that’s ideal for all scenarios.
That said, I took a look at Resolve’s export options, and have highlighted the parameters which I believe match those of videos exported directly from Depthkit in this screenshot:
Format: MP4
Codec: H.264
Resolution: Custom (match the original video and the timeline you’re working in)
Framerate: 30
Encoding Profile: Main
Pixel Aspect Ratio: Square
Data Levels: Full
Color Space Tag: Rec.709
Gamma Tag: Rec.709
Please keep in mind this hasn’t been thoroughly tested, and may produce some distortion artifacts in the geometry, but hopefully a video exported with these settings will play back for you. Give it a try and let us know how it looks.
