AVC video decoding bug in Edius 8.1?!

[Slartibart]

Hello,

There seems to be an AVC decoding bug in Edius 8.1 (8.10_0188). At regular intervals Edius shows the wrong frame. In real-time playback it looks like stuttering. When viewing frame-by-frame, it is easy to see that wrong frame is shown.

I have confirmed that the problem is in Edius decoding. If I use ffmpeg first to decode the clip, it works ok in Edius. Edius 8.0 (8.00_0089) is able to decode the clip just fine! The clips play back also fine in e.g. VLC and WMP.

I have put a short sample here:

https://onedrive.live.com/redir?resid=E78216F653C3416B!128&authkey=!APX01mN17qlkIew&ithint=video%2cmp4

First part is real-time, and the second part is slowed down a lot. In the second part, the problem can clearly be seen.

Extract from MediaInfo:
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt
Overall bit rate mode : Variable
Overall bit rate : 25.9 Mbps
Writing library : Apple QuickTime
com.apple.quicktime.model : iPhone 6s Plus
com.apple.quicktime.software : 9.1

Video
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : Yes
Format settings, ReFrames : 1 frame
Format settings, GOP : M=1, N=60
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Bit rate : 25.8 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Frame rate mode : Variable
Frame rate : 59.940 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
---

Has someone else seen this? I noticed the problem when updating Edius to 8.1 while working on a project. Suddenly, this problem appeared in clip view, timeline, and in the exported files. ;(

Thanks.

-Slartibart

[Slartibart]

Update: GV Browser 8.10_0188 decodes the files ok, but not Edius!

I have now re-checked this by first downgrading to 8.0, and then again upgrading to 8.1. Still the same...

Really annoying! Any ideas?

[Slartibart]

Hello,

Thanks. I have been thinking about something like that, but where can I find that option to disable hardware decoding??? I have browsed through all settings, but could not find it.

[antonsvideo]

http://forum.grassvalley.com/forum/attachment.php?attachmentid=14474&d=1447932370

[Slartibart]

Thanks, but what version is that? I don't have that option in Edius 8.1:

https://onedrive.live.com/redir?resid=E78216F653C3416B!129&authkey=!AMNfhl-orfS1aDA&v=3&ithint=photo%2cjpg

[GrassValley_PS]

It depends on your whether your Motherboard has Quick Sync ability.

[Slartibart]

Thanks. Yes, is does (Asus Z170-A Skylake). But was it so that the onboard graphics adapter needs to be enabled to use Quick Sync?

Anyway, as that option is not available, I assume hardware decoding is not enabled.

Any other suggestions?

[kpot]

Thanks. Yes, is does (Asus Z170-A Skylake). But was it so that the onboard graphics adapter needs to be enabled to use Quick Sync?

Anyway, as that option is not available, I assume hardware decoding is not enabled.

Any other suggestions?

See here (Post-#3):

http://forum.grassvalley.com/forum/showthread.php?t=37081

regards kurt

[Slartibart]

Update: I tested using the tool Mp4Cam2AVI to convert the container from Quicktime MOV to AVI (without touching the video stream). This decodes fine in Edius 8.1!

MediaInfo however shows one difference: CodecID changed from "avc1" to "H264". Other video parameters are the same (also "Format: AVC"), so it is not re-encoded. Writing the AVI-file from Mp4Cam2AVI is also instantaneous.

What is going on? Looks like the problem might be QT MOV?

Note: As I mention above, these files are decoded ok in Edius 8.0, and also in GV Browser 8.1?!

I just tried the evaluation copy of Premiere Elements 14, and no problems.

[Slartibart]

Thanks, good idea! The re-wrapping did however not help. Same error still in decoding. Video parameters in MediaInfo are now also identical to the original.

Note that this problem is not specific for one file. I have the same problem in ALL iPhone 6 and 6s files. Both 1080p60fps, and 4K 30fps.

Strange if nobody else experiencing this?

[Slartibart]

Question: Are there any changes in Edius 8.1 related to decoding of Quicktime MOV files? It looks like Quicktime Player is no longer needed? At least not in 8.1. Maybe the same was true for 8.0?

The only relevant info I could find in the Edius 8.1 Release Notes is the part about support for Skylake Quick Sync decoding/encoding. I do have the Skylake platform.

I tried to enable the onboard Intel graphics adapter in the BIOS. Then the "hardware decoding" option became available in Edius. It does not however matter if it is selected or not. The decoding of the MOV-file still does not work properly ;(

[Slartibart]

Update!

I re-created the project. Now with hardware decoding enabled from start. Seems to work now! No issues in a ~5 minute quick edit.

So far so good! I will check this some more, but it seems (at least on my setup) that iPhone 6/6s files need Quick Sync activated!