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WIP Apple VideoToolbox VP9 support - To be merged after Xcode 12 is released #31
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huiping192
reviewed
Sep 22, 2020
| if(*decoder.get_bits(1)) { // show_existing_frame - not a new frame | ||
| return 0; | ||
| } | ||
| *is_keyframe = !(*decoder.get_bits(1)); |
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May I ask a question? old h264 we can use kCMSampleAttachmentKey_DependsOnOthers to determine is keyframe or not, why here is not? sry I don't master the vp9 formate now. https://github.com/jgh-/VideoCore-Inactive/blob/859dc77dbe29a6d052beda92f2d7f407dbd303e7/transforms/Apple/H264Encode.mm#L66
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Apple seems to have added VP9 support to VideoToolbox. The FFmpeg encoder/decoder classes already support VP9.