On Sat, Oct 03, 2020 at 08:27:20AM +0200, Michael Koch wrote: > > > > > > Use correct player like mpv, which does not ignore color_trc. > > > > A player? The output is a jpg image and it's too dark. > > > Yes, player, ffmpeg is not correct in conversion. Because swscale is old > > > and ignores color_trc metadata that is required for correct display. > > > > > > Use zscale instead for converting pixel formats. > > > > Can you please give an example how to convert a DNG image to a JPG image > > with FFmpeg? > > I did try > ffmpeg -i sample_r00000.dng -vf zscale -y out.jpg > but it gives an error message. > The input image is from > https://drive.google.com/drive/folders/1u5m7aVAFPpEsL4YtDVsfSpfcve9PFG4m > and IrfanView has no problem to open this image.
Then join IrfanView mailing list. Every single DNG file you posted is invalid in some part. > > Michael > > > C:\Users\astro\Desktop\dng>c:\ffmpeg\ffmpeg -i sample_r00000.dng -vf zscale > -y out.jpg > ffmpeg version 2020-09-20-git-ef29e5bf42-full_build-www.gyan.dev Copyright > (c) 2000-2020 the FFmpeg developers > built with gcc 10.2.0 (Rev3, Built by MSYS2 project) > configuration: --enable-gpl --enable-version3 --enable-static > --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv > --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma > --enable-libsnappy --enable-zlib --enable-libsrt --enable-libssh > --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca > --enable-sdl2 --enable-libdav1d --enable-libzvbi --enable-librav1e > --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 > --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx > --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi > --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf > --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec > --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx > --enable-libglslang --enable-vulkan --enable-libcdio --enable-libgme > --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb > --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame > --enable-libvo-amrwbenc --enable-libwavpack --enable-libilbc --enable-libgsm > --enable-libopencore-amrnb --enable-libopus --enable-libspeex > --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite > --enable-libmysofa --enable-librubberband --enable-libsoxr > --enable-chromaprint > libavutil 56. 59.100 / 56. 59.100 > libavcodec 58.106.100 / 58.106.100 > libavformat 58. 58.100 / 58. 58.100 > libavdevice 58. 11.102 / 58. 11.102 > libavfilter 7. 87.100 / 7. 87.100 > libswscale 5. 8.100 / 5. 8.100 > libswresample 3. 8.100 / 3. 8.100 > libpostproc 55. 8.100 / 55. 8.100 > [tiff @ 0000025f5dbdf680] Assuming black level pattern values are identical > [mjpeg @ 0000025f5dbe4ec0] mjpeg_decode_dc: bad vlc: 0:0 (0000025f5dbe5588) > Last message repeated 1 times > [tiff_pipe @ 0000025f5dbdd640] Stream #0: not enough frames to estimate > rate; consider increasing probesize > Input #0, tiff_pipe, from 'sample_r00000.dng': > Duration: N/A, bitrate: N/A > Stream #0:0: Video: tiff, bayer_rggb16le, 6016x3200, 25 tbr, 25 tbn, 25 > tbc > Stream mapping: > Stream #0:0 -> #0:0 (tiff (native) -> mjpeg (native)) > Press [q] to stop, [?] for help > [tiff @ 0000025f5dbefe40] Assuming black level pattern values are identical > [mjpeg @ 0000025f5dc15180] mjpeg_decode_dc: bad vlc: 0:0 (0000025f5dc38248) > Last message repeated 1 times > code 3074: no path between colorspaces > Error while filtering: Generic error in an external library > Failed to inject frame into filter network: Generic error in an external > library > Error while processing the decoded data for stream #0:0 > Conversion failed! > > _______________________________________________ > 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". _______________________________________________ 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".
