Hi, I've got a question about the chroma sample location in h.265 (HEVC) video using ffmpeg with libx265.
I'm transcoding a source file with ffmpeg. According to ffprobe, the source file's chroma location is "left" (integer value 0). I assume that information is taken from the VUI data of the HEVC stream. (Or maybe there is no such information, and ffprobe assumes "left" by default.) When transcoding, I do *not* specify any chroma sample location on the command line, therefore it should be taken from the source file and be transferred to the target file unchanged. Indeed, when I run ffprobe on the target file, it reports "left" again. Additionally, ffmpeg sets the optional "chroma_siting" tag in the MKV stream header to "1,2" which means the same as "left". *However*, when I look at the encoder settings stored in the target file (with mediainfo, or simply with a hexdump), I can see that there is the libx265 option chromaloc=1. But the number 1 means "center", according to the libx265 documentation. Can somebody explain this? (BTW, I'm using ffmpeg 6.1.1, but I guess it's not an issue with the ffmpeg version, but rather an issue with my head ...) Best regards Oliver _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
