Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Announcements and Chat > General Discussion

 
 
Thread Tools Search this Thread Display Modes
Prev Previous Post   Next Post Next
Old 26th January 2015, 07:26   #1  |  Link
mustardman
Registered User
 
Join Date: Dec 2002
Location: Australia
Posts: 264
Rotating video without re-encoding (MP4 etc).

Before anyone jumps down my throat, I have done a global search on the doom9 forums, and have come across nothing of use.

It seems a common question to ask, but it also seems to be one that is quite elusive : rotating video (by multiples of 90deg) just like a JPG still can be rotated - without re-encoding.

I have searched wider, and there is a tool to rotate MJPEG losslessly, and there also seem to be a few tools that claim to rotate MP4 video losslessly (VideoGo, Video Cutter). However, it seems exceedingly unclear whether this process simply changes the way the video is displayed by the player (setting a 'display' flag in the stream), or actually rotating the video data in the stream itself.

Personally, I suspect the former. Rotating MJPEG is really a step up from rotating a single JPG image, but rotating a stream with any sort of past/future frame references would be hard.

Do any readers with superior knowledge on this subject have a definitave answer on this one?

Thanks,
MM
mustardman is offline   Reply With Quote
 

Tags
lossless, mjpeg, mp4, rotate

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 18:13.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.