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FORUMS Post Processing, Marketing & Presenting Photos Video and Sound Editing 
Thread started 21 Aug 2016 (Sunday) 14:53
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Need quick help on video

 
maverick75
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Post edited over 2 years ago by maverick75.
     
Aug 21, 2016 14:53 |  #1

Really a newbie when it comes to video, trying to do a quick edit but whenever I convert the footage with handbrake(or any other converter) I get messed up files.

It only happens with the footage from my A7, the one from my 7DM2 looks good.

Both were shot at 1080 60fps, only difference is the Canon has MOV and the A7 AVCHD.

Here's part of a screengrab to describe what is going on, since I don't know the correct term for it.

When playing the video the background looks good, just the subject has like line breaks?


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- Alex Corona Sony A7, Canon 7DM2/EOS M, Mamiya 645/67
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Scott ­ Spellman
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Aug 22, 2016 09:34 |  #2

maverick75 wrote in post #18101902 (external link)
Really a newbie when it comes to video, trying to do a quick edit but whenever I convert the footage with handbrake(or any other converter) I get messed up files.

It only happens with the footage from my A7, the one from my 7DM2 looks good.

Both were shot at 1080 60fps, only difference is the Canon has MOV and the A7 AVCHD.

Here's part of a screengrab to describe what is going on, since I don't know the correct term for it.

When playing the video the background looks good, just the subject has like line breaks?
thumbnail
Hosted photo: posted by maverick75 in
./showthread.php?p=181​01902&i=i81003865
forum: Video and Sound Editing

Why are you converting the video? Will your video editing software not use the video files natively? Does this problem appear on screen or in the final rendered video? Have you tried a different video player to display the video clip?




  
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kirkt
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Post edited over 2 years ago by kirkt.
     
Aug 22, 2016 12:17 |  #3

It looks like the video is getting interlaced during conversion, or you are shooting interlaced video and not accounting for it during conversion or playback. The "i" in a video format designation (like 60i) denotes interlaced video (alternating fields) versus progressive ("p") video. The movement of the subject (and the background to a lesser extent) in the scene makes it more obvious.

Kirk


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SailingAway
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Post edited over 2 years ago by SailingAway.
     
Aug 22, 2016 17:53 |  #4

Handbrake is an excellent converter.

It appears to be mis-interpreting the footage - these are definitely interlacing artifacts. Are you sure you have your camera settings right?
***EDIT***
I just looked up the A7 specs. It has a setting for 1080/60i. You don't want that. It also has a setting for 1080/60p. That's the one you want. I have no idea why Sony would include an i setting. That's crazy, IMHO.
**********

The first thing to try is any updates to Handbrake. It may be that the latest version will clear up this problem.

Otherwise, you'll need to go into the Handbrake picture settings, and try some of the deinterlace controls. Here is the official guide:
https://trac.handbrake​.fr/wiki/Deinterlacing​Guide (external link)
The guide explains the controls, and also provides links to further resources.

Here is more on decombing vs. deinterlacing:
https://trac.handbrake​.fr/wiki/Decomb (external link)

And here is a general orientation to the Picture Settings controls:
https://trac.handbrake​.fr/wiki/PictureSettin​gs (external link)

Finally, there may be some A7 settings to explore. As you've found, only the moving elements of a scene will show interlacing artifacts, bear this in mind when shooting tests. I'm not familiar with the A7, but here are some general issues which may crop up:

* Some cameras will embed 24p in a 60i wrapper. The resulting video IS 60i, but looks like 24p. If an encoder like Handbrake is given 60i, it will convert to progressive. Test 720p30, 1080p60, and 1080p30 and see if it clears up. If so, the immediate solution is to shoot in one of these modes. If you simply must shoot 24p and your cam will only do it in a 60i wrapper, you'll want to investigate the de-telecine settings in Handbrake:
https://trac.handbrake​.fr/wiki/Telecine (external link).

* Likewise, some cameras will embed 30p in a 60i wrapper. Perhaps the setting will be called something like 30psf. Here you may not have many choices of camera settings; you'll want to investigate the de-telecine settings in Handbrake:
https://trac.handbrake​.fr/wiki/Telecine (external link).

* Or, just skip shooting video with the A7. It's old ;-)a

Please post back any solutions you find...


From the upper left corner of the U.S.
Photos, Video & Pano r us.
College and workshop instructor in video and audio.
70D, Sigma 8mm, Tokina f2.8 11-16, Canon EF-S f2.8 17-55, Sigma f2.8 50-150 EX OS, Tamron 150-600VC. Gigapan Epic Pro, Nodal Ninja 5 & R10.

  
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maverick75
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Location: Riverside,California
     
Aug 22, 2016 22:26 |  #5

Scott Spellman wrote in post #18102567 (external link)
Why are you converting the video? Will your video editing software not use the video files natively? Does this problem appear on screen or in the final rendered video? Have you tried a different video player to display the video clip?


Yes that's the reason! Well it was. I noticed I hadn't updated the software, as soon as I did it took the footage without having to convert it.

sometimes it's the smallest mistakes!


- Alex Corona Sony A7, Canon 7DM2/EOS M, Mamiya 645/67
Flickr (external link) - 500px (external link) - Website (external link)- Feedback -Feedback

  
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Need quick help on video
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