On Fri, Jun 28, 2024 at 1:20 AM Richard Bartczak via ffmpeg-user < ffmpeg-user@ffmpeg.org> wrote:
> > Am 28.06.24 um 00:52 schrieb Mark Filipak: > > On 27/06/2024 17.55, Richard Bartczak via ffmpeg-user wrote: > >> > >> Am 27.06.24 um 22:39 schrieb Mark Filipak: > >>> Hello All, > >>> > >>> I'm considering buying professional video software to evaluate and > >>> analyze FFmpeg trims and splices and for troubleshooting. My objective > >>> is to improve my edits, and to improve FFmpeg. I'm retired, I have > >>> plenty of time, I have plenty of money. > >>> > >>> From here: > >>> > https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/uc_system/design/guides/videodg/vidguide/basics.html > >>> > >>> > >>> "I-frames are also known as key frames because their content is > >>> independent of any other frames and they can be used as a reference > >>> for other frames." > >>> > >>> If "key frame" is simply another name for an I-frame, why are there > >>> two names? pdr0 & Balling at trac.ffmpeg.org hint that key frames are > >>> specific I-frames with specific methods but they don't elaborate and I > >>> don't want to burden them. > >>> > >>> I'd appreciate an explanation of 'key frame', or a link to an existing > >>> explanation of course. All I can find is keyframe animation, which of > >>> course is a technique, not an MPEG method. > >>> > >>> Thank you, > >>> Mark. > >>> > > > > Thanks, Gloster. Now I'm going to eliminate everything that has > > nothing to do with key frame. > > > >> Gloster > > > > Oh, look at that. There's nothing left. Hahaha.... I just love > > ffmpeg-user. There's a laugh a minute. > > > Laugh a few minutes more : > > "An example of interview prediction is shown in Figure 10.18. View 0 > (top) is predicted > using a hierarchical GOP structure (Chapter 6) using conventional > H.264/AVC tools. Each > GOP consists of an I slice or ‘key picture’ followed by seven B slices." > (Iain E. Richardson - H264 (2nd edition),2010, p. 304). > > Iain E. Richardson, refer to > https://ieeexplore.ieee.org/author/37268555400 Difference between I-frame and key frame is so subtle that is not relevant for your project. > > > Gloster > > > > > _______________________________________________ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
