I was recompiling CinGG fot testing "--with-single-user" and found it will fail in x264 directory without some of my old reverts, performed by slackbuild. I have old (2.8) ffmpeg installed system-wide, and x264's configure script was not disabling this integration correctly (even if code was unconditionally adapted to new ffmpeg), so compilation fail. I just added one more parameter in x264 line of thirdparty/Makefile diff --git a/cinelerra-5.1/thirdparty/Makefile b/cinelerra-5.1/thirdparty/Makefile index 27f13c65..880d3128 100644 --- a/cinelerra-5.1/thirdparty/Makefile +++ b/cinelerra-5.1/thirdparty/Makefile @@ -249,7 +249,7 @@ tiff.cfg_params+= --enable-shared=no --disable-zstd $(call if_pkg,libwebp,\ --with-webp-lib-dir=$(call pkg_libs,libwebp))\ $(call if_npkg,libwebp,--disable-webp) twolame.cfg_params?=--enable-shared=no -x264.cfg_params?= --enable-static --enable-pic +x264.cfg_params?= --disable-swscale --enable-static --enable-pic x265.cfg_vars?=$(call cmake_config,source) x265.cfg_params?= -DENABLE_SHARED=no libvpx.cfg_params?= --enable-pic --disable-avx512 shold be applicable cleanly to latest git (commit 3325029f915f54fe7e14d7b2cb1d4b8f4dd8a640 ) I don't think many use such outdated ffmpeg, but this line should not hurt (because x264 in our case just feed via libavcodec API, and scaling can be done early) I rendered small fragment with non-default pixel format, and it appear to work: mediainfo /dev/shm/test.mp4 General Complete name : /dev/shm/test.mp4 Format : MPEG-4 Format profile : Base Media Codec ID : isom (isom/iso2/avc1/mp41) File size : 1.16 MiB Duration : 15 s 382 ms Overall bit rate : 633 kb/s Writing application : Lavf58.45.100 Video ID : 1 Format : AVC Format/Info : Advanced Video Codec Format profile : High 4:4:4 Predictive@L3 Format settings : CABAC / 4 Ref Frames Format settings, CABAC : Yes Format settings, Reference frames : 4 frames Codec ID : avc1 Codec ID/Info : Advanced Video Coding Duration : 15 s 360 ms Bit rate : 499 kb/s Width : 720 pixels Height : 576 pixels Display aspect ratio : 4:3 Frame rate mode : Constant Frame rate : 25.000 FPS Standard : PAL Color space : YUV Chroma subsampling : 4:4:4 Bit depth : 8 bits Scan type : Progressive Bits/(Pixel*Frame) : 0.048 Stream size : 936 KiB (79%) Writing library : x264 core 157 Encoding settings : cabac=1 / ref=3 / deblock=1:0:0 / analyse=0x1:0x111 / me=hex / subme=7 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=0 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=4 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=2 / keyint=25 / keyint_min=13 / scenecut=40 / intra_refresh=0 / rc_lookahead=25 / rc=crf / mbtree=1 / crf=23.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / ip_ratio=1.40 / aq=1:1.00 Color range : Limited Matrix coefficients : BT.601 Codec configuration box : avcC Audio ID : 2 Format : AAC LC Format/Info : Advanced Audio Codec Low Complexity Codec ID : mp4a-40-2 Duration : 15 s 382 ms Bit rate mode : Constant Bit rate : 128 kb/s Channel(s) : 2 channels Channel layout : L R Sampling rate : 48.0 kHz Frame rate : 46.875 FPS (1024 SPF) Compression mode : Lossy Stream size : 240 KiB (20%) Language : Russian Default : Yes Alternate group : 1 mplayer also showing video and saying among other things: [swscaler @ 0x57740034]bicubic scaler, from yuv444p to yuv420p using MMXEXT But I can keep this patch local if you think it risky to apply.