Hello Guys,
when using vidstabtransfor to stabilize videos with BICUBIC
interpolation, the low exposure (0?) pixels are turned to white, causing
white artefacts in the video.
Using other than bicubic interpolation(none, linear, bilinear) works well.
It is indepentdent to other setting like postprocessing, video codec and
others.
You may check the results here:
http://informatik.hu/ffmpeg-vidstab-artefacts-bicubic.png
Tried the Windows build from zeranoe:
$ ffmpeg -version
ffmpeg version N-87306-g6743351 Copyright (c) 2000-2017 the FFmpeg
developers
built with gcc 7.2.0 (GCC)
configuration: --disable-static --enable-shared --enable-gpl
--enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va
--enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth
--enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls
--enable-iconv --enable-libass --enable-libbluray --enable-libbs2b
--enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm
--enable-libilbc --enable-libmodplug --enable-libmp3lame
--enable-libopencore-amrnb --enable-libopencore-amrwb
--enable-libopenh264 --enable-libopenjpeg --enable-libopus
--enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex
--enable-libtheora --enable-libtwolame --enable-libvidstab
--enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx
--enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxavs --enable-libxvid --enable-libxml2 --enable-libzimg
--enable-lzma --enable-zlib
libavutil 55. 75.100 / 55. 75.100
libavcodec 57.106.101 / 57.106.101
libavformat 57. 82.100 / 57. 82.100
libavdevice 57. 8.101 / 57. 8.101
libavfilter 6.105.100 / 6.105.100
libswscale 4. 7.103 / 4. 7.103
libswresample 2. 8.100 / 2. 8.100
libpostproc 54. 6.100 / 54. 6.100
And also self built on Debian Linux 8:
$ ffmpeg -version
ffmpeg version N-87278-g183216b Copyright (c) 2000-2017 the FFmpeg
developers
built with gcc 4.9.2 (Debian 4.9.2-10)
configuration: --enable-libvidstab --enable-gpl --enable-libx264
--enable-libx265 --enable-nonfree --enable-libass --enable-libfdk-aac
--enable-libfreetype --enable-libmp3lame --enable-libopus
--enable-libtheora --enable-libvorbis --enable-libvpx --enable-libxvid
libavutil 55. 74.100 / 55. 74.100
libavcodec 57.105.100 / 57.105.100
libavformat 57. 82.100 / 57. 82.100
libavdevice 57. 8.100 / 57. 8.100
libavfilter 6.105.100 / 6.105.100
libswscale 4. 7.103 / 4. 7.103
libswresample 2. 8.100 / 2. 8.100
libpostproc 54. 6.100 / 54. 6.100
Command line used to encode:
$ ffmpeg -y -t 3 -i VI000053.mp4 -vf
vidstabtransform=:optalgo=gauss:maxangle=0.12566370614:interpol=bicubic:maxshift=54:smoothing=30:optzoom=0:zoom=0:input=VI000053-stab.trf:crop=keep
-vcodec utvideo VI000053-stab.avi
Br,
Mihaly
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