Avidemux: The beginning frame is not a key frame. Please move the A marker

[devilcoelhodog]

I have found the same problems point above:

---> http://avidemux.org/admForum/viewtopic.php?id=5999

---> http://www.avidemux.org/admWiki/index.php?title=Cutting

---> http://www.avidemux.org/admWiki/inde...ing_MPEG_files

I am unable to save after editing from 2.4.3 (r4533) on Mac OSX 10.5.6 because of the above error, yet I always make cuts at I frames (using the double arrow buttons to move the edit point) and the display always shows an I frame (at the moment it's reading Frame Type: I (00) as the start of my video). I have no filters selected and have chosen 'Copy' for both Video and Audio content.

Any suggestions most welcome.

Many thanks - GeoffT.

Not the start of your video needs to be an I-Frame (that's always the case), the A-Marker must be set on an I-Frame!

Thanks for the reply. Sadly it makes no difference. I tried setting the A marker to the beginning of the file (which as you say is an I frame) and to another I frame in the file but the result is the same: 'The beginning frame is not a key frame. Please move the A marker.'

GeoffT.

If your first frame is not an I-frame use the "double forward arrow" to skip to an I-frame. Move one frame back (single arrow). Click on B for B-frame. Select (menu) Edit->Cut to remove the first few frames.
Now your first frame is an I-frame.

I have the same problem, the frame IS an I frame. I can advance to a future iframe as well, and set the A marker there, same result when trying to "copy" a m2ts input file containing H.264 to mkv output. Simply want to change containers.

No matter what I do, the error comes up and I cannot save mkv.

using the >> arrows, you probably keep landing on the wrong type of frame, regardless of what it shows in the preview.

I was having the same problem, but found that if i navigate manually with mouse when choosing the (A) inpoint rather than using the arrows, it lands on a frame that is usuable.

It'll be harder to have a precise in point, but it works everytime, and the >> arrows failed everytime.

For those who has the same issues. :P

Any others solutions for this problem, point here too.

Thanks.

best regards.

devil (johner)

[The village idiot]

Yes, use the two buttons that advance by I frame and it will then land on an I frame that it can deal with. There is a guide that Baldrick wrote covering this and showing the buttons.

http://www.videohelp.com/guides/how-...at-id1091#1091


Sometimes I have found that this still didn't work and I had to clear the edit points several times before it did work. I think that command is under the EDIT tab at the top. Or if that still didn't work I would exit the app and start it again.