Dank an Johannes!
mencoder -ovc help # zeigt verfügbare Codecs # lavc ist angeblich der beste. Ab und zu wird auch x264 empfohlen. mencoder -vf -o output.avi -oac copy -ovc lavc input.avi # Drehung mit Option rotate=1 / rotate=2
Windows as of 2018
Today I prefer using Handbrake for video shrinking / compression as it work in Windows, Linux and Mac.
For movies captured by my digital camera or smartphone
I use preset "Matroska -> H.265 MKV 720p30" as template and modify
Picture -> Height 720 for downscaling to 720pt
Video -> Quality 25 for most videos
Audio -> 64bit Mono (for camera or telephone videos)
(this modifications can be saved as "User Preset" which can be set to default preset)
Trimming some seconds off the ends is achieved in section "Source" by switching from "Chapters" to "Seconds".
Rotate On Filters tab choose Rotate
Windows as of 2010
I like the free windows tool Format Factory!
For compressing the videos taken by my digicam (resolution=640x480px) I usually use the following settings:
- container: mkv (or mp4)
- codec: H264
- bitrate: between 512 and 1024 kbit/s (512kbit/s for 640x480px seems to be enough)
(note: 600MB/hour equals 1365kbit/s)
- 2 Pass encoding: True (for better quality, but much longer computing time)
- only one channel (=Mono) @ 64kbit/s (as the tiny mic. in the digicam is not able to record real stereo)
- sometimes I even disable the audio channel if there is nothing but noise on it.
Output Folder -> "Output to source file folder"
Rotating the video by 90°
use the following settings:
- Rotate = Left or Right
- (AspectRatio=4:3) was needed in earlier versions, now use Automatic
16:9, FullHD: 1920x1080 (oder auch 1280x720) schrumpfen auf 800x450?
Video Size: 800x450 Aspect Ratio: 16:9
My Format Factory Profiles
Here are my custom profiles, that can be found at
h264, 512kbit, mono
Type=MP4 VideoCodec=AVC(H264) VideoBitrate=512000 Width=0 Height=0 FPS=0.000 AspectRatio=0.000 AudioCodec=AAC AudioBitrate=64000 SampleRate=0 Channel=1 Volume=0 TowPassEncode=1
h264, 512kbit, mono, rotate (one has to set the aspect ratio by hand!)
Type=MP4 VideoCodec=AVC(H264) VideoBitrate=512000 Width=0 Height=0 FPS=0.000 AspectRatio=1.333 AudioCodec=AAC AudioBitrate=64000 SampleRate=0 Channel=1 Volume=0 TowPassEncode=1
mute instead of mono:
AudioCodec=AAC AudioBitrate=0 SampleRate=0 Channel=0 Volume=0
(It turned out, that FF version 2.50 does ignore the Channel=0 setting, so you habe to disable audio in the dialog)