Help - Avidemux Editing Video

[MourningStar]

I am novice and senior citizen with issue that I hope you can help. I have an mp4 with copy video / audio config. All I want to do is capture and save a small part. I am not sure I do this correct. What I do is I set Marker A and Marker B for section to remove and when I do 'cut' I keep getting this dialogue (image attached). So I clik no. I do not understand what/which/where is 'endpoint'/'keyframe'. How to resolve?


[Attachment 72264 - Click to enlarge]

[poisondeathray]

You must use the "<<" ">>" buttons in the GUI to navigate and set the mark in/ mark out points when using "copy" mode.

You cannot "cut" anywhere in copy mode with some types of video - the video types that use temporal compression, where not every frame is an "I" frame or encoded completely. The temporal compression relies on data from other frames. You can only cut on the "I" frames , or "keyframes", which are complete frames

[MourningStar]

^
resolved - thank you!!!!!

[techmot]

I find it more difficult to cut in Avidemux when dealing with analogue video. Tape jumping and abrupt stop and start of a recording between one program to another can make it hard to cut where the frames are due to the tapes video interference.

[poisondeathray]

I find it more difficult to cut in Avidemux when dealing with analogue video. Tape jumping and abrupt stop and start of a recording between one program to another can make it hard to cut where the frames are due to the tapes video interference.

If your analog video transfer was to an I-frame format - every frame is a keyframe - and you can cut/stream copy mode anywhere without limitation .

Long gop /temporal compression formats are for end delivery, and higher compression ratios after it's been edited - they are less than ideal for editing