Detailed description of mencoder and ffmpeg parameters (Java video processing)

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FFmpeg Quick Start in Windows

Ffmpeg parameter description

Detailed description of mencoder and ffmpeg parameters (Java video processing)

Java generates video thumbnails (ffmpeg)

Use ffmpeg to convert video files to FLV

Java video processing mencoder

Java video processing ffmped + mencoder

 

Mencoder to flv
Mencoder-ffourcc FLV1-lavfopts protocol-of lavf-oac mp3lame-lameopts aq = 9: cbr: br = 64: vol = 2-ovc lavc-lavcopts vcodec = flv: vbitrate = 200: acodec = mp3: abitrate = 56-vf scale = 320: 270, expand = 320: 270: 1, crop = 320: 270: 0: 0-ofps 18-srate 22050 input. xxx-o output. flv

Conversion from Mencoder to avi
Mencoder.exe-oac mp3lame-lameopts aq = 7: cbr: br = 64-srate 32000-vf scale = 220: 176-ovc lavc-ffourcc DX50-lavcopts vcodec = mpeg4: vbitrate = 320 "input. xxx "-o" output. avi"
Mencoder .. /v/wmv. wmv-o .. /v/wmv-3.flv-of lavf-oac mp3lame-lameopts abr: br = 56-srate 22050-ovc lavc-lavcopts vcodec = flv: vbitrate = 500: mbd = 2: mv0: trell: v4mv: White: last_pred = 3

Mencoder-oac mp3lame-lameopts aq = 7: cbr: br = 64-srate 32000-vf scale = 220: 176-ovc lavc-ffourcc DX50-lavcopts vcodec = mpeg4: vbitrate = 320 "input. xxx "-o" output. avi"

Mencoder-oac mp3lame-lameopts aq = 7: cbr: br = 64-srate 22050-vf scale = 320:-3-ovc xvid-xvidencopts bitrate = 600 "wmv. wmv "-o" wmv. avi"

Mencoder-oac lavc-lavcopts acodec = mp2: abitrate = 64-srate 22050-vf scale = 320:-3-ofps 15-ovc xvid-xvidencopts bitrate = 400 rmvb. rmvb-o rmvb. avi

Mencoder 1. rmvb-oac mp3lame-lameopts preset = 64-ovc xvid-xvidencopts bitrate = 600-of avi-o rmvb. avi

RMVB to FLVCODE
Mencoder-vf scale = 320: 240-ffourcc FLV1-of lavf-lavfopts I _certify_that_my_video_stream_does_not_use_ B _frames-ovc lavc-lavcopts vcodec = flv: vbitrate = 200-srate 22050-oac lavc-lavcopts acodec = mp3: abitrate = 56 OK/1. rmvb-o OK/rmvb. flv

The two ffmpeg parameters allow ffmpeg to split a large video into several small pieces of independently played files.
-Ss time_off set the start time offset
-T duration set the recording time

Mencoder segment parameters:
-Ss 0
-Endpos 120

FFmpeg to 3gp:
Ffmpeg-y-I **. **-ac 1-acodec amr_nb-ar 8000-AB 24-s 128x96 [-vcodec mpeg4]-B 40 k-r 8 **. 3gp

FFmpeg to flv:
Ffmpeg-I inputfile. xxx-AB 56-ar 22050-qmin 2-qmax 16-B 320 k-r 15-s 320x240 outputfile. flv

FFmpeg Parameters
For video files:
FFmpeg-I XXX. XXX-y-F image2-SS 8-T 0.001-s 350x240 xxx.jpg

For existing FLV:
FFmpeg-I XXX. FLV-y-F image2-SS 8-T 0.001-s 350x240 xxx.jpg

Convert the first 30 frames of a video into a GIF:
FFmpeg-I XXX. XXX-vframes 30-y-F GIF xxx.gif

Captures a clip that lasts for 10 seconds from 10 seconds.

FFmpeg watermark parameters:
FFmpeg-I inputfile. xxx-tagpict ": 220: 210"-AB 56-ar 22050-qmin 2-Qmax 16-B 320 k-R 15-s 320x240 outputfile. FLV

Watermark parameter description:
-Tagpict ": 220: 210"
(Find 0002 in the directory where FFmpeg is located. mjpg, mask. two image files used as watermarks for processing are then added to each clip of the video file during transcoding at the specified coordinates, for example, 220: 210)

Add the avisynth watermark:
First, FFMPEG/mencoder requires -- enable-avisynth;
Conversion parameters: FFMPEG-y-I 1.avs-B 320 k rmvb-avs.flv
1. AVS format:
Video = directshowsource ("rmvb. rmvb", 15). bilinearresize (320,240)
Logo = imagesource ("logo2.jpg ")
Logomask = imagesource ("mask2.jpg ")
Overlay (video, logo, mask = logomask)

Add subtitle watermarks when converting mencoder to FLV

I tried it and can add it, but some parameters are not well set. For example, Chinese subtitles are only displayed "_____".
CD mencoder
Mencoder ../file/test. mov-o ../FLV/zbzbzb. FLV-of lavf-OAC mp3lame-lameopts ABR: Br = 56
-OVC lavc-lavcopts vcodec = FLV: vbitrate = 500: mbd = 2: mv0: v4mv: last_pred = 3-subpos 5-subfont
-Text-scale 10-Unicode-font c:/Arial. TTF-sub ../file/test. srt-lavfopts
I _certify_that_my_video_stream_does_not_use_ B _frames-srate 22050
Pause
 
The above is executed in a batch file, so it is written as this
 
Subpos indicates the position of the subtitle. The larger the vertical direction is, the lower the vertical direction is. the horizontal direction parameter is not found. The minimum value is 0 and the maximum value is 100.
Subfont-text-scale: Set the font size
-Unicode text encoding method. Others have not been tried.
-Font font file
-Sub: Your subtitle file

Blog Source: http://www.cnblogs.com/wucf2004/archive/2007/10/10/919523.html