Video tutorial: Understanding the critical H.264 encoding options
- 6-29-2009
- Categorized in: H.264 production, Video tutorials
This short (under 10-minute) PowerPoint-based tutorial details how to configure the most important H.264
encoding parameters (profiles, levels, entropy encoding and b-frames),
discusses why H.264 encoding quality varies by encoding tool and identifies which
tools produce the best quality. It's the entry level information that I
provide in most H.264 encoding lectures and useful to anyone producing
H.264 videos with tools like Sorenson Squeeze, Adobe Media Encoder,
Apple Compressor and Telestream Episode Pro.
The video compliments the application specific videos available on Streaminglearningcenter.com, which detail how to configure options like CABAC and b-frames in different encoding tools, but don't discuss why. This tutorial details the pros and cons of each configuration option, and tells you when and why to use it.
The video was produced and encoded at 640x480 resolution, though it's presented in 400x300 resolution on the page. Click the four-arrow full screen icon on the bottom right, and the video should look crystal clear. That's the plan, anyway, let me know how it looks to you.
The video compliments the application specific videos available on Streaminglearningcenter.com, which detail how to configure options like CABAC and b-frames in different encoding tools, but don't discuss why. This tutorial details the pros and cons of each configuration option, and tells you when and why to use it.
The video was produced and encoded at 640x480 resolution, though it's presented in 400x300 resolution on the page. Click the four-arrow full screen icon on the bottom right, and the video should look crystal clear. That's the plan, anyway, let me know how it looks to you.
Understanding the Key H.264 Encoding Parameters from jan ozer on Vimeo.
I'm still confused when I need to set its value. Do I have to pick the same value than source ? Is it so critical for computer playback ?
Thank you.
"Most video starts life at 29.97 or 24 frames per second (fps). Usually, producers who shoot at 24 fps deliver at that rate, while many producers that shoot at 29.97 fps deliver at 15 fps to save bandwidth. Though, in concept, it feels like dropping the frame rate by 50% would also drop the data rate by 50% with no loss in quality, it seldom works this way.
Rather, according to the research that I’ve performed, the average data rate of video produced at 15 fps is about 20% lower than that produced at 30fps, not 50%. Still a substantial reduction, but often that comes at a subtle quality cost.
For example, when considering 15 fps, note that high motion video will look noticeably choppy to many viewers. In addition, tight facial shots, where lip synch is critical, often a look a bit out of sorts at 15 fps as well. When deciding which frame rate to use for your video, you should produce video at full frame rate and the lower rate, and then compare to see which delivers the best overall presentation."
Hope this helps; it not, let me know.
Dear sir,
May i get avi to H.264 conversion source code .........
please reply me
i just want to know how they named as H.264?