Sun Jul 29, 2018 8:45 am
I was so happy to find out that the Media Manager in DR 15 should now be able to trim GOP footage.
Unfortunately it doesn't work with all files. It has to do with the wrapper.
HEVC from a Samsung camera in a MP4 wrapper is fine, but H.264 out of a GH5 or a Sony A7RII doesn't work. The Media Manager stops with an error message as soon as it gets to such a file.
When I rewrap that footage into MOV it works too. Unfortunately not all rewrapping tools recognize the TC (which both MP4 formats have and which is read by DR). The low cost MP4toQT does not transfer the original TC, while Kyno does. Kyno is a great tool, but a bit costly for re-wrapping only.
BTW, it definitely works without any re-encoding. If you define handles, they are always extended to the next I-frame. But one heads-up: In the rare case that you use overlapping parts of the same clip (for whatever reason this might be), only the first one makes it into the trim. Ouch!
Using two separate parts of one source is not a problem, you'll have both after trim.
Wonder how it works under Windows or Linux.
P.S. Found a solution to the overlapping clips problem: just drag one (or rather both) of them from the timeline to the Media Pool to create an independent subclip. Voilá: the whole footage needed is retained after trimming. Maybe better do it for both, I didn't yet test this solution extensively.
Some more testing shows that the most recent version of MP4toQT (both for Mac and PC) is now retaining original TC. Unfortunately that program crashes with mp4 out of the GH5. Retaining TC is crucial for any roundtripping, as you probably now.
Unfortunately it doesn't work with all files. It has to do with the wrapper.
HEVC from a Samsung camera in a MP4 wrapper is fine, but H.264 out of a GH5 or a Sony A7RII doesn't work. The Media Manager stops with an error message as soon as it gets to such a file.
When I rewrap that footage into MOV it works too. Unfortunately not all rewrapping tools recognize the TC (which both MP4 formats have and which is read by DR). The low cost MP4toQT does not transfer the original TC, while Kyno does. Kyno is a great tool, but a bit costly for re-wrapping only.
BTW, it definitely works without any re-encoding. If you define handles, they are always extended to the next I-frame. But one heads-up: In the rare case that you use overlapping parts of the same clip (for whatever reason this might be), only the first one makes it into the trim. Ouch!
Using two separate parts of one source is not a problem, you'll have both after trim.
Wonder how it works under Windows or Linux.
P.S. Found a solution to the overlapping clips problem: just drag one (or rather both) of them from the timeline to the Media Pool to create an independent subclip. Voilá: the whole footage needed is retained after trimming. Maybe better do it for both, I didn't yet test this solution extensively.
Some more testing shows that the most recent version of MP4toQT (both for Mac and PC) is now retaining original TC. Unfortunately that program crashes with mp4 out of the GH5. Retaining TC is crucial for any roundtripping, as you probably now.
My disaster protection: export a .drp file to a physically separated storage regularly.
Please visit digitalproduction.com/author/uliplank/
Studio 19.1.3
2017 iMac, MacOS 13.7.4, eGPU
MacBook M1 Pro and M4 Pro mini, MacOS 14.7.5
SE, USM G3
Please visit digitalproduction.com/author/uliplank/
Studio 19.1.3
2017 iMac, MacOS 13.7.4, eGPU
MacBook M1 Pro and M4 Pro mini, MacOS 14.7.5
SE, USM G3