Chipcraft

Changing the targeted luminance in runtime?

1

Excuse me for the stupid question, but I could not find any obvious way of overriding the default luminance target (of 203 nits) when the library is used e.g., with...

No 10-bit HEVC encode support in FFmpeg?

3

Since basically no documentation exist on the subject, I thought you might be able to give an answer. Is it really the case that it is not possible to encode...

Greenish tint in the output

41

Libplacebo filtering causes the output image to feature a greenish tint. In this case, libplacebo was used for cropping. Otherwise the same workflow, using lavfilter crop-filter instead of libplacebo does...

Since the current FFMpeg master does not implement the "preset" option to toggle between the three different options (default, fast, high_quality), can the results of e.g., the "high_quality" mode be...

[Bug]: HEVC encoder fails if pre-analysis is enabled with 10-bit output

4

The issue occurs when pre-analysis is enabled either by choice, or automatically per the requirement of the selected rate-control mode together with the 10-bit output color-depth. Everything works as intended...

Various: Rate control modes, quality settings, QVBR

7

**Issue 1** (Navi 31, AV1 & HEVC): CBR and VBR rc-modes produce the same output: - HEVC VBR: "TranscodeHW -codec HEVC -input Input.mp4 -width 1920 -height 1080 -output Output1.mp4 -HevcTargetBitrate...

Conflicting documentation: HEVC pre-analysis

1

AMF 1.4.29 /components/VideoEncoderHEVC.h comment for pre-analysis states: _"Currently only works in AMF_VIDEO_ENCODER_HEVC_RATE_CONTROL_METHOD_PEAK_CONSTRAINED_VBR mode. Refer to AMF Video PreAnalysis API reference for more details."_ Meanwhile, /doc/AMF_Video_Encode_HEVC_API.pdf states: _"QVBR, HQVBR and HQCBR...

The hotkey functionality has been (and still is) available in the original PresentMon however, it has been removed from the Intel version. Since it is more or less essential for...

Tested using FFMpeg [Release/6.1](https://git.ffmpeg.org/gitweb/ffmpeg.git/shortlog/refs/heads/release/6.1), [Release/7.0](https://git.ffmpeg.org/gitweb/ffmpeg.git/shortlog/refs/heads/release/7.0) and [Release/7.1](https://git.ffmpeg.org/gitweb/ffmpeg.git/shortlog/refs/heads/release/7.1) and libplacebo https://github.com/haasn/libplacebo/commit/5788a82f459f617a999c4d56278d54d0edfc7b81. Release/6.0 is no longer compatible with the recent libplacebo. A hardware agnostic issue, tested using Intel DG2 Arc and NVIDIA...