http://imagej.273.s1.nabble.com/Why-ImageJ-can-open-video-but-FFMPEG-fails-with-Palette-size-0-is-wrong-tp5021360p5021361.html
Was the original format lossy or lossless? Aside from space savings, why do you want to convert to jpeg? That will degrade spatial resolution and the ability to perform intensity based analysis or feature extraction. Was it really captured in 8-bit grayscale? Other possible ways to reduce file size without degrading image quality include cropping to the most important region of interest, removing every nth frame or cutting into segments. Converting between compressed formats can turn your movie into mush.
> On Oct 26, 2018, at 10:50 AM, Aleksejs Fomins <
[hidden email]> wrote:
>
> Hi
>
> I have a video which is recorded by a camera in our lab. When I open it
> with ImageJ, it says it is a single channel 8bit video. When I open it
> with VLC, it says it is a 200fps video with "Codec: Palettized RGB with
> palette element R:G:B (RGBP)". In ImageJ, I am able to save it with jpeg
> or png compression no problem.
>
> I wanted to automatize the process to compress multiple videos, since
> they are very large (each video ~2GB). I tried compressing them with
> FFMPEG, but alas, even converting from raw back to raw seems to fail.
> See below for complete FFMPEG summary.
>
> Any advice is welcome.
>
> Thanks,
> Aleksejs
>
>
> ffmpeg -i 2018.09.28_16_05_11.avi -vcodec rawvideo output.avi
> ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the
> FFmpeg developers
> built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
> configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1
> --build-suffix=-ffmpeg --toolchain=hardened
> --libdir=/usr/lib/x86_64-linux-gnu
> --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl
> --enable-shared --disable-stripping --disable-decoder=libopenjpeg
> --disable-decoder=libschroedinger --enable-avresample --enable-avisynth
> --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray
> --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite
> --enable-libfontconfig --enable-libfreetype --enable-libfribidi
> --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame
> --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp
> --enable-libschroedinger --enable-libshine --enable-libsnappy
> --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora
> --enable-libtwolame --enable-libvorbis --enable-libvpx
> --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid
> --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab
> --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r
> --enable-libx264 --enable-libopencv
> WARNING: library configuration mismatch
> avcodec configuration: --prefix=/usr
> --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg
> --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu
> --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl
> --enable-shared --disable-stripping --disable-decoder=libopenjpeg
> --disable-decoder=libschroedinger --enable-avresample --enable-avisynth
> --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray
> --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite
> --enable-libfontconfig --enable-libfreetype --enable-libfribidi
> --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame
> --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp
> --enable-libschroedinger --enable-libshine --enable-libsnappy
> --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora
> --enable-libtwolame --enable-libvorbis --enable-libvpx
> --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid
> --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab
> --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r
> --enable-libx264 --enable-libopencv --enable-version3 --disable-doc
> --disable-programs --disable-avdevice --disable-avfilter
> --disable-avformat --disable-avresample --disable-postproc
> --disable-swscale --enable-libopencore_amrnb --enable-libopencore_amrwb
> --enable-libvo_aacenc --enable-libvo_amrwbenc
> libavutil 54. 31.100 / 54. 31.100
> libavcodec 56. 60.100 / 56. 60.100
> libavformat 56. 40.101 / 56. 40.101
> libavdevice 56. 4.100 / 56. 4.100
> libavfilter 5. 40.101 / 5. 40.101
> libavresample 2. 1. 0 / 2. 1. 0
> libswscale 3. 1.101 / 3. 1.101
> libswresample 1. 2.101 / 1. 2.101
> libpostproc 53. 3.100 / 53. 3.100
> Input #0, avi, from '2018.09.28_16_05_11.avi':
> Duration: 00:00:13.44, start: 0.000000, bitrate: 796322 kb/s
> Stream #0:0: Video: rawvideo, pal8, 790x628, 796097 kb/s, 200 fps,
> 200 tbr, 200 tbn, 200 tbc
> Output #0, avi, to 'output.avi':
> Metadata:
> ISFT : Lavf56.40.101
> Stream #0:0: Video: rawvideo, pal8, 790x628, q=2-31, 200 kb/s, 200
> fps, 200 tbn, 200 tbc
> Metadata:
> encoder : Lavc56.60.100 rawvideo
> Stream mapping:
> Stream #0:0 -> #0:0 (rawvideo (native) -> rawvideo (native))
> Press [q] to stop, [?] for help
> [rawvideo @ 0x24a13e0] Palette size 0 is wrong
> Last message repeated 250 times
> [rawvideo @ 0x24a13e0] Palette size 0 is wronge=00:00:01.26
> bitrate=795479.3kbits/s
> Last message repeated 258 times
> [rawvideo @ 0x24a13e0] Palette size 0 is wronge=00:00:02.55
> bitrate=795461.0kbits/s
> Last message repeated 259 times
> [rawvideo @ 0x24a13e0] Palette size 0 is wronge=00:00:03.85
> bitrate=795455.0kbits/s
> Last message repeated 260 times
> [rawvideo @ 0x24a13e0] Palette size 0 is wronge=00:00:05.16
> bitrate=795452.0kbits/s
> Last message repeated 260 times
> [rawvideo @ 0x24a13e0] Palette size 0 is wronge=00:00:06.46
> bitrate=795450.2kbits/s
> Last message repeated 261 times
> [rawvideo @ 0x24a13e0] Palette size 0 is wronge=00:00:07.77
> bitrate=795449.0kbits/s
> Last message repeated 259 times
> [rawvideo @ 0x24a13e0] Palette size 0 is wronge=00:00:09.07
> bitrate=795448.2kbits/s
> Last message repeated 258 times
> [rawvideo @ 0x24a13e0] Palette size 0 is wronge=00:00:10.37
> bitrate=795447.6kbits/s
> Last message repeated 258 times
> [rawvideo @ 0x24a13e0] Palette size 0 is wronge=00:00:11.66
> bitrate=795482.7kbits/s
> Last message repeated 256 times
> [rawvideo @ 0x24a13e0] Palette size 0 is wronge=00:00:12.95
> bitrate=795478.8kbits/s
> Last message repeated 96 times
> frame= 2687 fps=517 q=-0.0 Lsize= 1304599kB time=00:00:13.43
> bitrate=795480.0kbits/s
> video:1304518kB audio:0kB subtitle:0kB other streams:0kB global
> headers:0kB muxing overhead: 0.006238%
>
> --
> ImageJ mailing list:
http://imagej.nih.gov/ij/list.html