Doom9's Forum - View Single Post - LAV Filters

DTL · 27th July 2018, 22:52

But ffmpeg Do properly decode sequence of pictures that handle interlaced h.265 field-based video. Generally users do not ask ffdshow and LAV to output weaved frames or perform deinterlace for such h.265 streams. But LAV must parse h.265 stream VUI data and mark output DirectShow stream samples properly at least.

Now it marks them as non-interlaced so all further renderers fails to display it properly.

Also field-based stream is completely valid DirectShow stream marked with flags AMINTERLACE_IsInterlaced | AMINTERLACE_1FieldPerSample in the VIDEOINFOHEADER2. As well as more common interlaced-frames stream. So I hope if LAV splitter-decoder will correctly pass-through the metadata to the next to decoder renderer it may do all required work for displaying it correctly.

Ofcourse if LAV-software is too high-level wrapper around ffmpeg that it can not go low-level into VUI of h.265 data processed so it really no way to do it. Sadly in this case.

27th July 2018, 22:52	#22999 \| Link
DTL Registered User Join Date: Jul 2018 Posts: 1,070	But ffmpeg Do properly decode sequence of pictures that handle interlaced h.265 field-based video. Generally users do not ask ffdshow and LAV to output weaved frames or perform deinterlace for such h.265 streams. But LAV must parse h.265 stream VUI data and mark output DirectShow stream samples properly at least. Now it marks them as non-interlaced so all further renderers fails to display it properly. Also field-based stream is completely valid DirectShow stream marked with flags AMINTERLACE_IsInterlaced \| AMINTERLACE_1FieldPerSample in the VIDEOINFOHEADER2. As well as more common interlaced-frames stream. So I hope if LAV splitter-decoder will correctly pass-through the metadata to the next to decoder renderer it may do all required work for displaying it correctly. Ofcourse if LAV-software is too high-level wrapper around ffmpeg that it can not go low-level into VUI of h.265 data processed so it really no way to do it. Sadly in this case.