![]() When producing the original iPod Touch, Apple limited H.264 support to the Baseline Profile up to level 3.0, which means up to presumably because it would cost too much to support HD video at 30 fps.īack in the day, many producers included rungs with multiple H.264 profiles in their encoding ladders to ensure playback on older devices. There are many levels, from 1.0 to 6.2, that define resolution and frame rate limits. There are three profiles, Baseline, Main, and High, that define the encoding tools that can be used in a profile (like B-frames, which aren’t available in the Baseline Profile). By way of background, H.264 has multiple profiles and levels that allow hardware developers to target levels of support that meet their CPU, size, and battery life targets. When encoding H.264, you always want to choose the preset for maximum compatibility. Which x264 Preset: Medium, Slow, Slower?ĭo we need to stick with Main Profile, or can we use High?.Level: Is there a Level or decode buffer size we should restrict ourselves to?.Do we need to stick with Main Profile, or can we use High?.
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