Does using only I-Frames improve video quality?
Does using only I-Frames increase video quality?
Richard-hardy
wrote on 2/25/2019, 2:13 AM
Comments
johnebaker
wrote on 2/25/2019, 3:49 AM
Hi
. . . .Does using only I-Frames improve video quality? . . . . .
Only if you are recording All Intra (I frames only) in camera otherwise no.
The trade of using all intra video is the massive file sizes you get as there is no compression.
To get an idea of the difference in file sizes, exporting a video from MEP as MP4 and Uncompressed movie and compare the file sizes.
If you are creating DVD or BD discs then All Intra is irrelevant, the video has to be compressed and DVD/BD players do not support an uncompressed format.
HTH
John EB
Richard-hardy
wrote on 2/25/2019, 1:34 PM
Hi
. . . .Does using only I-Frames improve video quality? . . . . .
Only if you are recording All Intra (I frames only) in camera otherwise no.
The trade of using all intra video is the massive file sizes you get as there is no compression.
To get an idea of the difference in file sizes, exporting a video from MEP as MP4 and Uncompressed movie and compare the file sizes.
If you are creating DVD or BD discs then All Intra is irrelevant, the video has to be compressed and DVD/BD players do not support an uncompressed format.
HTH
John EB
Hello, thanks for your help.
How about B-Frames? Does using more B-Frames than P-Frames give better quality?
johnebaker
wrote on 2/25/2019, 2:05 PM
Hi
. . . . Does using more B-Frames than P-Frames give better quality? . . . .
No. See this article for an explanation.
HTH
John EB
Scenestealer
wrote on 4/5/2019, 8:18 PM
Hi
Not using, or using fewer P or B frames when encoding a movie will decrease quality for a certain set bitrate and file size.
Using extra B frames with the same bitrate could improve quality in some cases but would more likely be used if you wanted a smaller file size ie more compression rather than quality.
. . .Does using only I-Frames improve video quality? . . . . .
Only if you are recording All Intra (I frames only) in camera otherwise no.
True, but as John has stated, at the expense of file size and bitrate.
......... as there is no compression.
Not true. Intra frame (I frame) codecs like Prores, Mjpeg, etc. still compress the information spatially in each frame similar to jpeg compression but not temporally (ie from one frame to the next) like Inter frame codecs eg. MPEG2, MPEG4.
Peter