Hello
I need to edit an MP4 video (AVC + AAC) so it starts between two key frames (ie. in VirtualDub, when hitting the button with a yellow key icon.)
What is the right way to proceed?
Thank you.
Try StreamFab Downloader and download from Netflix, Amazon, Youtube! Or Try DVDFab and copy Blu-rays! or rip iTunes movies!
+ Reply to Thread
Results 1 to 7 of 7
Thread
-
Last edited by yetanotherlogin; 30th Mar 2014 at 19:37.
-
Long GOP formats like avc and mpeg-2 will require a full re-encode in VirtualDub........
1) go to frame you want as start, hit the "Home" Key to mark as in.
2) go the frame you want as last, hit "End" key to mark as out.
3) export to your favorate compressor..............Got my retirement plans all set. Looks like I only have to work another 5 years after I die........ -
.........or use the external encoder feature of Virtualdub to encode to file of choice (ie...AVC/AAC.mp4 or AVC/AC3.mkv etc...)
-
VirtualDub has a function (under the Video menu) called "smart rendering". When it's enabled, I'm pretty sure it re-encodes the video around the cut point if necessary, then copies the rest. How well it works, or how easy it is to use when cutting AVC video I have no idea. I've never used it myself.
I'd not trust VirtualDub to display anything frame accurately. Especially for AVC. Often you can use the key buttons to move backward and forward and keep landing on different frames. You might try opening the video with MPC-HC and using the shift key along with the left/right arrow keys on your keyboard. That'll jump between keyframes.
If there's no keyframe where you need to cut, you could also try remuxing the MP4 as an MKV with MKVMergeGUI and then give cutting with MKV Cutter a spin. -
-
A couple of good points. AVC is meant to be the finished output. Not editing. Trying to jump forward and backward in any editor will drive you batty. Even VideoReDo which IMO is the best program for editing out parts of a video has problems, especially if you try to do too many cuts.
The second point of remuxing mp4 into an mkv container has worked well for me also. It seems to be easier to work with an mkv file instead of mp4. Smart rendering also crossed my mind. Virtualdub doesn't seem to have trouble with the end frame as it does with the starting frame which is why it is a good practice if you have a lot of cuts to do in Virtualdub to start at the end and work your way to the front. Less likely to have sync issues.
Similar Threads
-
Just an idea: ffmpeg based key frame accurate cutting,...
By Selur in forum Newbie / General discussionsReplies: 30Last Post: 21st Mar 2017, 04:56 -
how to find key frames in h264
By Chris33 in forum Video ConversionReplies: 4Last Post: 27th Jan 2014, 06:18 -
Split video outside the key frames?
By KeyMs92 in forum EditingReplies: 14Last Post: 23rd Sep 2011, 07:53 -
VDub, Key frames and syncing...
By takearushfan in forum Newbie / General discussionsReplies: 4Last Post: 16th Feb 2010, 15:04 -
Cutting Mp4 between I-frames, replacing some frames
By eymerich in forum EditingReplies: 4Last Post: 29th Jul 2009, 09:41