[FFmpeg-user] V360 stabilization

[Paul B Mahol]

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
> ffmpeg-user at ffmpeg.org
> https://ffmpeg.org/mailman/listinfo/ffmpeg-user
> 
> To unsubscribe, visit link above, or email
> ffmpeg-user-request at ffmpeg.org with subject "unsubscribe".