#X264 ffmpeg crf 25 how to#
#X264 ffmpeg crf 25 full#
#X264 ffmpeg crf 25 license#

The quality would likely be improved, of course, but you’d be distributing the same bandwidth stream, so bandwidth savings would be modest. In this case, switching to capped CRF would have no impact on bandwidth cost because you’d just be switching one 3000 kbps stream (or lower) for another. In pattern A, all of the streams delivered are 3000Kbps or below, perhaps representative of distributing in a third-world country. Each pattern shows the percentage of each stream actually delivered from the adaptive group, as you should be able to derive from your log files. To explain, consider Table 1, which shows an encoding ladder and three different stream distribution patterns, A, B, and C. It all depends upon which streams in your encoding ladder that you’re delivering to your existing customers. For others, it will improve the quality of service for their viewers.

#X264 ffmpeg crf 25 full#

Encoding a full ladder with capped CRF.īandwidth Savings, Increase QoS, or Both?įor some companies, deploying Capped CRF will reduce bandwidth costs. Selecting capped CRF in the Hybrik cloud encoder. The CRF clip was consistently slightly higher than the 200% constrained VBR. The result plot shows significant qualitative differences between capped CRF and 200% constrained VBR. Even worse data rate swings in this file encoded using 200% constrained VBR. Significant data rate swings in this file encoded using Capped CFR. A per-title scorecard from Streaming Media East 2018. Table 1 Three stream delivery patterns.Bandwidth Savings, Increase QoS, or Both?.Or, depending upon your encoding platform, you can roll your own via a technique called Capped CRF.

#X264 ffmpeg crf 25 license#

You can license optimization technology from Beamr, Crunch Media, Euclid IQ, and ZPEG deploy on-premise encoders from Capella Systems, Harmonic, Elemental, and others with per-title capabilities, or access per-title encoding in the cloud from Bitmovin, Brightcove, JWPlayer, and Mux. You can access per-title encoding in many forms from many different vendors. Since most encoding ladders are so conservative, in most cases, deploying per-title encoding results in a data rate reduction for most clips. Hard-to-encode video clips are encoded at higher data rates than your normal ladder, while easier-to-encode clips are encoded at lower data rates. Per-title encoding customizes each encode for the complexity of the video footage. Capped CRF is a credible technique currently used by JWPlayer in the company’s online video platform for both H.264 and VP9. Capped CRF is also a simple per-title encoding method that can reduce your bandwidth costs and improve viewer QoE. The first article was Saving on Encoding: Adjust Encoding Configuration to Increase Capacity.Īrticle summary: Capped CRF encoding is a single-pass encoding method that can save encoding costs compared to two-pass VBR.

#X264 ffmpeg crf 25 how to#

This is the second in a five-part series on how to cut your encoding and streaming costs.