Am 20.08.2020 um 09:57 schrieb Masala Kentaro:
hello!
I have problems using FFmpeg, while trying to convert DNG-sequence
into mp4/mov/avi video file.
While converting, I also need to downgrade the resolution of the video
from original 6016x3200 to 2030x1080.
First problem: I got almost black screen in the resulting video. Had
to play with gamma and brightness options, but there were still
obvious problems with saturation and contrast after that.
(I tried simple DNG to PNG conversion of a single file, and it also
results in almost black screen, command:
ffmpeg -v 9 -loglevel 99 -i e:\12345\sample_r00001.dng e:\output.tga)
Let's not forget that the original poster of this thread had a question.
I can't answer it, but I did try to reproduce it.
I took a RAW CR2 image from my Canon 6D, converted it to DNG with Adobe
DNG Converter 12.4, and then tried to convert it to JPG with FFmpeg:
ffmpeg -i IMG_3459.dng out_6D.jpg
This didn't work, see the console output below.
I also tested with a RAW image from a Canon 5D-MK4, with the same
negative result.
Michael
C:\Users\astro\Desktop\dng>c:\ffmpeg\ffmpeg -i IMG_3459.dng out_6D.jpg
ffmpeg version git-2020-08-21-412d63f Copyright (c) 2000-2020 the FFmpeg
developers
built with gcc 10.2.1 (GCC) 20200805
configuration: --enable-gpl --enable-version3 --enable-sdl2
--enable-fontconfig --enable-gnutls --enable-iconv --enable-libass
--enable-libdav1d --enable-libbluray --enable-libfreetype
--enable-libmp3lame --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus
--enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt
--enable-libtheora --enable-libtwolame --enable-libvpx
--enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265
--enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib
--enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis
--enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex
--enable-libxvid --enable-libaom --enable-libgsm --enable-librav1e
--enable-libsvtav1 --disable-w32threads --enable-libmfx
--enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va
--enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
--enable-libopenmpt --enable-amf
libavutil 56. 58.100 / 56. 58.100
libavcodec 58.100.100 / 58.100.100
libavformat 58. 51.100 / 58. 51.100
libavdevice 58. 11.101 / 58. 11.101
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 @ 000001f73e39f440] Assuming black level pattern values are identical
[tiff @ 000001f73e39f440] Tiled TIFF is not allowed to strip
[tiff_pipe @ 000001f73e39d400] Stream #0: not enough frames to estimate
rate; consider increasing probesize
[tiff_pipe @ 000001f73e39d400] decoding for stream 0 failed
[tiff_pipe @ 000001f73e39d400] Could not find codec parameters for
stream 0 (Video: tiff, none): unspecified size
Consider increasing the value for the 'analyzeduration' (0) and
'probesize' (5000000) options
Input #0, tiff_pipe, from 'IMG_3459.dng':
Duration: N/A, bitrate: N/A
Stream #0:0: Video: tiff, none, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
Stream #0:0 -> #0:0 (tiff (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[tiff @ 000001f73e3a5f80] Assuming black level pattern values are identical
[tiff @ 000001f73e3a5f80] Tiled TIFF is not allowed to strip
Error while decoding stream #0:0: Invalid data found when processing input
Cannot determine format of input stream 0:0 after EOF
Error marking filters as finished
Conversion failed!
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