UHD file support problem

[erdna]

Hereunder an UHD clip which is one of the ~50 clips of a vacation video. They are all well supported by Corel VSX9, except the one linked hereunder. This clip plays OK in VLC, WMP,etc. It edits without problems in Edits 7.53; it can be converted by WinX HD, but it crashes VSX when imported. The clip is a 100Mbps VBR XAVC video straight from a Sony FDR AV33 camcorder. The only thing I noticed is a rather high peak bitrate after ~3 seconds playback (126Mbps). It looks like as VSX is unable to cope with these peak bitrates (I think). Does anybody have a clue why this happens?
https://www.dropbox.com/s/m2973c5rb07ug ... 5.MP4?dl=0

[Ken Berry]

I am currently downloading that clip, André, though at the moment Windows is telling me it will take two hours for what I see is a 39 second clip...

But a first questions: when you say it is XAVC, can you clarify whether it is 'proper' XAVC or is it XAVC-S? As you know, VS can only handle the latter.

[Ken Berry]

I could insert the clip in the VS library, and it played smoothly there. But when I inserted it in the timeline I had the same problem as you: it crashed X9. I see, though, that it is indeed listed as XAVC and not XAVC-S, so that is most likely your problem.

Moreover, in the timeline, only the first frame showed with the rest of the clip showing black. (I have Thumbnails Only set in Preferences.) It would not play from there and I could not drag the scrubber. After a couple of minutes, all the frames showed, but when I tried to play it again, that was when VS crashed.

On reopening VS, when I dragged the clip into the timeline I got a message asking if I wanted the Project Properties to match, and I said yes. This did not happen the first time. Again only the first frame was showing with the rest of the timeline black. But this time the clip played smoothly in Clip mode and by the time play ended, all frames were visible. But when I tried playing in Project mode, VS crashed again. I tried again a third time, but this time after dragging the clip into the timeline, I did not attempt to play it but went straight to Share and selected "Same As Project Settings". The rendering window appeared but remained at 0% for several minutes. Then it came up with a message that "Frame 9 is unreadable", which could indicate another possible reason for the VS crash. (I noted that the first couple of seconds were rather disrupted with the camera looking as though it was being juggled in the hand.)

I then went back into Edit mode and tried to clip the first couple of seconds off the start of the clip which would, of course, have removed Frame 9. Had another crash. Tried again and this time successfully removed the first two seconds. Tried Same As Project Settings again, but this time VS crashed (again!) after a couple of seconds, with no progress showing on the rendering line. I gave up at this point...

I might note that it played erratically throughout in VLC, Windows Media Player and Media Player Classic; and it would not open in Quicktime Pro player. Curiously enough it played fine in the current version of DivX player.

It would also play and seemed editable in Adobe Premiere Elements 14 and Sony Movie Studio Platinum 13. The latter showed the format as being AVC while PE also said it was XAVC. To further confuse the issue, Cyberlink Power Director 13 had no trouble playing the file either, but showed it as being XAVC-S. (I have PD 14 but have not installed it as yet, but imagine it will do and say the same thing.) Magix Movie Edit Pro 2015 crashed immediately I even tried to highlight the clip in the library window.

[RobertOZ]

Downloaded the clip, which appears to be XAVC format, VSX9 crashes when importing

Sony Movie Studio Platinum 13 imports, but is very slow to load, plays video and audio but is very pixilated

Adobe Premiere Elements 14, imports OK, plays video and audio with some minor pixilation

[Ken Berry]

Curious, Robert. It loaded quickly in my Sony, and in PE 14 I could see no pixilation!

[RobertOZ]

Here are two images of what I see in Sony Movie Studio

The time line whilst waiting for it to load and the pixilated preview

With Premiere Elements it could be the road surface giving the impression of some pixilation

[Ken Berry]

Yes, I got that Media Offline thing too, but after a minute or two the video appeared and played fine. I just went through the process again but could still not see any pixelation -- at least not on my 24 inch 1920 x 1080 monitor...

[erdna]

Thanks Ken an Robert for testing. The file is an XAVC-S file. Sorry for being incorrect...but the extension chaos goes on...also MediaInfo does not know XAVC-S and shows just XAVC for my file. A (pro) XAVC file is schown as .MXF in MediaInfo.
The only thing that I could detect is a bitrate peak after 3 seconds, lasting 2 seconds (~125Mbps) which, I think, chokes the VSX SW buffer needed for frame reconstruction in the timeline.










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