On Tue, 11 Dec 2012 11:31:49 +0000 (UTC), Carl Eugen Hoyos <cehoyos@ag.or.at> wrote:
I was wondering if ffmpeg could apply some filters before further reducing the filesize?
Definitely, please see the fine filter documentation: http://ffmpeg.org/ffmpeg.html#Video-Filters (hue, lut, geq and mp=eq2 come to mind.)
I've tried the following commands, but none worked to brighten a dark video: I tried each of those commands, but observed no change: -vf mp=eq2=1:1.68:0.3:1.25:1:0.96:1 -vf "lutyuv=y=val*1.3" -vf "lutyuv=y=val*2.0" -filter:v lutyuv="y=gammaval(0.7)" Here's how I used the command, where HERE contained one of the switches above ffmpeg -ss 00:05:00 -t 20 -i input.mp4 HERE -vf scale=640:-1 -c:v libx264 -pix_fmt yuv420p -c:a copy -shortest -f mp4 output.mp4 Thank you. PS: More information about the input file: c:\>ffprobe.exe -i input.mp4 ffprobe version N-66595-g1c4c78e Copyright (c) 2007-2014 the FFmpeg developers built on Oct 3 2014 22:01:53 with gcc 4.9.1 (GCC) configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-av isynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enab le-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca -- enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-lib modplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrw b --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinge r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --en able-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable- libx265 --enable-libxavs --enable-libxvid --enable-zlib libavutil 54. 9.100 / 54. 9.100 libavcodec 56. 2.101 / 56. 2.101 libavformat 56. 7.104 / 56. 7.104 libavdevice 56. 1.100 / 56. 1.100 libavfilter 5. 1.102 / 5. 1.102 libswscale 3. 1.100 / 3. 1.100 libswresample 1. 1.100 / 1. 1.100 libpostproc 53. 1.100 / 53. 1.100 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf54.18.100 Duration: 00:27:31.04, start: 0.000000, bitrate: 1415 kb/s Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1283 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default) Metadata: handler_name : VideoHandler Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 12 5 kb/s (default) Metadata: handler_name : SoundHandler