On 2/20/20, Michael Koch <[email protected]> wrote: > Am 20.02.2020 um 12:49 schrieb Paul B Mahol: >> On 2/20/20, Michael Koch <[email protected]> wrote: >>> Am 20.02.2020 um 11:07 schrieb Paul B Mahol: >>>> On 2/20/20, Michael Koch <[email protected]> wrote: >>>>> I'd like to understand how the new "fill" option in the remap filter >>>>> works. >>>>> What is an "unmapped pixel"? How is it possible that pixels are >>>>> unmapped, if the xmap and ymap files have the same size as the output >>>>> image? Is a pixel "unmapped" if it has invalid coordinates (negative or >>>>> too big) in the xmap or ymap files? >>>> Previously all unmapped pixels were set to black for rgba or dark >>>> green for y420p. >>>> It is very obvious to understand even for every little kid in the block. >>> Finally I got it working. A pixel can be declared as "unmapped" by >>> setting the values to 65535 in the xmap and ymap files. However using a >>> negative value (for example -1) doesn't work. In this case the pixel is >>> mapped to the top left pixel of the input image. >>> This behaviour might be obvious for little kids, but not for me. Should >>> be added to documentation. >> Nope. Documentation does not need trivial information. >> Obviously by having even limited programming experience one would >> found out that remaps are unsigned short, thus can not be negative. >> You never showed your map files. so I assume everything is wrong on >> your end. > > This is an example that produces a crash abort in the third command > line. All pixels are mapped to themselves, except pixel (1,1) which is > mapped to (65535,65535) > > c:\ffmpeg\ffmpeg -f lavfi -i nullsrc=size=20x20 -vf > format=pix_fmts=gray16le,geq='if(bitand(eq(X,1),eq(Y,1)),65535,X)' > -frames 1 -y xmap.pgm > c:\ffmpeg\ffmpeg -f lavfi -i nullsrc=size=20x20 -vf > format=pix_fmts=gray16le,geq='if(bitand(eq(X,1),eq(Y,1)),65535,Y)' > -frames 1 -y ymap.pgm > c:\ffmpeg\ffmpeg -f lavfi -i color=blue:size=20x20 -i xmap.pgm -i > ymap.pgm -lavfi "format=pix_fmts=rgb24,remap=fill=red" -frames 1 -y out.png > > Console output for third command line: > > F:\Wormhole_2020>c:\ffmpeg\ffmpeg -f lavfi -i color=blue:size=20x20 -i > xmap.pgm > -i ymap.pgm -lavfi "format=pix_fmts=rgb24,remap=fill=red" -frames 1 -y > out.png > ffmpeg version git-2020-02-18-ebee808 Copyright (c) 2000-2020 the FFmpeg > develop > ers > built with gcc 9.2.1 (GCC) 20200122 > configuration: --enable-gpl --enable-version3 --enable-sdl2 > --enable-fontconfi > g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d > --enable-libb > luray --enable-libfreetype --enable-libmp3lame > --enable-libopencore-amrnb --enab > le-libopencore-amrwb --enable-libopenjpeg --enable-libopus > --enable-libshine --e > nable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame > --enable > -libvpx --enable-libwavpack --enable-libwebp --enable-libx264 > --enable-libx265 - > -enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib > --enable-gmp --enab > le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc > --enable-libmysofa --en > able-libspeex --enable-libxvid --enable-libaom --enable-libmfx > --enable-ffnvcode > c --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec > --enable-dxva2 - > -enable-avisynth --enable-libopenmpt --enable-amf > libavutil 56. 41.100 / 56. 41.100 > libavcodec 58. 70.100 / 58. 70.100 > libavformat 58. 38.101 / 58. 38.101 > libavdevice 58. 9.103 / 58. 9.103 > libavfilter 7. 76.100 / 7. 76.100 > libswscale 5. 6.100 / 5. 6.100 > libswresample 3. 6.100 / 3. 6.100 > libpostproc 55. 6.100 / 55. 6.100 > Input #0, lavfi, from 'color=blue:size=20x20': > Duration: N/A, start: 0.000000, bitrate: N/A > Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 20x20 > [SAR 1:1 DA > R 1:1], 25 tbr, 25 tbn, 25 tbc > Input #1, pgm_pipe, from 'xmap.pgm': > Duration: N/A, bitrate: N/A > Stream #1:0: Video: pgm, gray16le, 20x20, 25 tbr, 25 tbn, 25 tbc > Input #2, pgm_pipe, from 'ymap.pgm': > Duration: N/A, bitrate: N/A > Stream #2:0: Video: pgm, gray16le, 20x20, 25 tbr, 25 tbn, 25 tbc > Stream mapping: > Stream #0:0 (rawvideo) -> format > Stream #1:0 (pgm) -> remap:xmap > Stream #2:0 (pgm) -> remap:ymap > remap -> Stream #0:0 (png) > _______________________________________________ > ffmpeg-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe".
==5391== Process terminating with default action of signal 11 (SIGSEGV) ==5391== General Protection Fault ==5391== at 0x7F95723: ??? (libswscale/x86/yuv_2_rgb.asm:376) ==5391== by 0x7F938A6: yuv420_rgb24_ssse3 (yuv2rgb_template.c:177) ==5391== by 0x7F48565: sws_scale (swscale.c:978) ==5391== by 0x52FD417: scale_slice (vf_scale.c:646) ==5391== by 0x52FD417: scale_frame (vf_scale.c:808) ==5391== by 0x52FD417: filter_frame (vf_scale.c:822) ==5391== by 0x51A3A50: ff_filter_frame_framed (avfilter.c:1066) ==5391== by 0x51A3A50: ff_filter_frame_to_filter (avfilter.c:1214) ==5391== by 0x51A3A50: ff_filter_activate_default (avfilter.c:1263) ==5391== by 0x51A3A50: ff_filter_activate (avfilter.c:1425) ==5391== by 0x51A7FFA: ff_filter_graph_run_once (avfiltergraph.c:1456) ==5391== by 0x51AA417: push_frame (buffersrc.c:184) ==5391== by 0x51AA417: av_buffersrc_add_frame_internal (buffersrc.c:247) ==5391== by 0x51A9E7D: av_buffersrc_add_frame_flags (buffersrc.c:167) ==5391== by 0x1373F6: ifilter_send_frame (ffmpeg.c:2188) ==5391== by 0x1373F6: send_frame_to_filters (ffmpeg.c:2262) ==5391== by 0x131666: decode_video (ffmpeg.c:2461) ==5391== by 0x131666: process_input_packet (ffmpeg.c:2615) ==5391== by 0x12DCB5: process_input (ffmpeg.c:4509) ==5391== by 0x12DCB5: transcode_step (ffmpeg.c:4629) ==5391== by 0x12DCB5: transcode (ffmpeg.c:4683) ==5391== by 0x129982: main (ffmpeg.c:4885) ==5391== This is caused by recently added ssse3 path for rgb24 conversion in swscale. Can you take a look? _______________________________________________ ffmpeg-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
