Is HEVC supported as output profile VideoRedo V5 Pro?

#1
I would like to edit a HEVC video and save it without re-encoding. Can VideoRedo V5 Pro do this yet? If not, any idea when the feature will be added?
 

Dan203

Senior Developer
Staff member
#4
Unfortunately no. We've been busy recently working on our professional product line. We plan to get back to work on v6 soon. Still no ETA on when it will be complete though.
 

Dan203

Senior Developer
Staff member
#6
Sometimes easier to see the S8/S8+ .mp4 video file characteristics in a .pdf.
View attachment 2307

No doubt phones/cameras will come out with variations of these (one day including HDR10 as well as 4k)
Those all say H.264. The biggest issue with those files is they're variable frame rate.

Variable frame rate presents a real problem for VRD. You see most of VRDs routines are based on a known duration for every frame in the file. When you have a constant frame rate that frame duration is static. Every frame in that video is displayed for X ticks of the clock. We use this known value to do all sorts of things in VRD including displaying time codes in the UI, seeking, maintaining sync, looking for dropped frames, and calculating the new time stamps for the output video. Variable frame rate screws that all up because frames don't have a constant duration. One frame might be displayed for 10 ticks and the next might be displayed for 100 ticks. This screws up the UI because not every second of video has the same number of frames. It screws up seeking because guessing the location of a specific frame, in bytes, becomes significantly less accurate. And it messes up editing as the calculation needed to create new time stamps after removing big chunks of video with unknown frame durations becomes exponentially more complicated.
 
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#7
OK and thanks for your honest answer. I do understand, a cost/benefit decision.

I was hoping for the best, since editing home videos with VRD would have been a breeze.

As a guess, some of your future home market segment (home users wanting to edit video footage from their new "4k mobile phones") will be unavailable to you from now on given that's the way Samsung are punting :(
 

Dan203

Senior Developer
Staff member
#8
Home video editing has never really been our market anyway. We don't offer titling, transitions, music overlay, etc... that most of the home movie editors have. VideoReDo's main focus has always been on editing TV shows for personal archives.
 

Danr

Administrator
Staff member
#10
I don't think that Dan203 is aware of this change, but V6 fully supports VBR. When VBR support is enabled, the ability of the automatic sync fixing for missing frames is reduced or disabled.
 
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Danr

Administrator
Staff member
#12
One of the issues we haven't 100% decoded on is what happens when you transcode? Do you always convert to fixed frame rate or leave as VFR?
 
#13
I did a little googling (but not a lot) ... it seems to the uninitiated like me that the VFR->CFR conversion methods I saw sounded a tad rudimentary with a possibility of introducing "jerkiness" - which would appear to be undesirable where the cost and effort has been taken record it in 4k "HDR" :) You'd be more across the state of the art than I though.

At the moment I have not started testing with ffmpeg to find out what happens under each of the options available there.

Without a shred of understanding, I'm currently inclined to leave my home movies as VFR and try to slice/dice them up like that (i.e. being closest to the original format) although I don't know the "timing" consequences of doing that with VFR. I'm also considering transcoding maybe to hevc, so maybe CFR is the only reasonably way to do that ? IDK.

In other words, I don't know :)
 
#15
Timing for V6/HEVC?

I too am very interested in HEVC editing without recoding and have been told it will be part of v6.

It's been several months since the last post - any updates on when even beta versions of v6 will be available??

I don't think that Dan203 is aware of this change, but V6 fully supports VBR. When VBR support is enabled, the ability of the automatic sync fixing for missing frames is reduced or disabled.
 
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