mencoder

视频网站中提供的在线视频播放功能,播放的都是FLV格式的文件,它是Flash动画文件,可通过Flash制作的播放器来播放该文件.项目中用制作的player.swf播放器. 多媒体视频处理工具FFmpeg有非常强大的功能包括视频采集功能、视频格式转换、视频抓图、给视频加水印等。 ffmpeg视频采集功能非常强大，不仅可以采集视频采集卡或USB摄像头的图像，还可以进行屏幕录制，同时还支持以RTP方式将视频流传送给支持RTSP的流媒体服务器，支持直播应用。 1.能支持的格式 ffmpeg能解析的格式：（asx，asf，mpg，wmv，3gp，mp4，mov，avi，flv等） 2.不能支持的格式 对ffmpeg无法解析的文件格式(wmv9，rm，rmvb等),可以先用别的工具（mencoder）转换为avi(ffmpeg能解析的)格式. 实例是将上传视频转码为flv格式,该格式ffmpeg支持,所以我们实例中需要ffmpeg视频处理工具. 数据库 MySQL5.5 实例所需要的数据库脚本 drop database if exists db_mediaplayer; create database db_mediaplayer; use db_mediaplayer; create table tb_media( id int not null primary key auto

This is what I have done so far: Command to create a transparent PNG image: convert -size 640x480 -background transparent -fill blue \ -gravity South label:ROCK image1-0.png Command to create a transparent video: ffmpeg -loop 1 -f image2 -i image1-0.png -r 20 -vframes 100 \ -vcodec png -pix_fmt bgra mov-1.mov (as per this post ) - I expect this video to be a transparent video . Command to overlay a video with another: ffmpeg -i final-video.mov -sameq -ar 44100 \ -vf "movie=mov-1.mov [logo];[in][logo] overlay=0:0 [out]" \ -strict experimental final-video.mov Above commands works perfect and I

I'm doing a bunch of video encoding for a variety of devices and platforms. I've bounced back and forth a few times between mencoder and ffmpeg . Which do you recommend and why? Side question: From googling it seems that mencoder uses ffmpeg. Does it do this all the time or only when it deems necessary? You are right, mencoder uses ffmpeg. Mencoder is actually a universal interface to a number of different codecs or codec libraries like ffmpeg. So, beyond ffmpeg, mencoder can be compiled with support to x264, xvid, lame mp3 and various others that I haven't used. The point is that if you have

I need to split an flv file into chunks of the known size on linux server. For example my original file is 9Mb and the chunk size is 4Mb. So I should get 3 parts - 4Mb, 4Mb and 1 Mb. Seems that FFmpeg can split only by time. Mencoder can start by time (-ss TIME) and finish by size ( -endpos SIZE MB). But if start second of the first chunk is obviously 0, then how can I get start second for next chunks? Do you have any suggestions? Thanks in advance. calculate ~time (sec) of every block & use -ss X -t X+avg_block_time for split video There is a commandline utility which does just that: http:/

I'm trying to create a Python script that would : Look into the folder "/input" For each video in that folder, run a mencoder command (to transcode them to something playable on my phone) Once mencoder has finished his run, delete the original video. That doesn't seem too hard, but I suck at python :) Any ideas on what the script should look like ? Bonus question : Should I use os.system or subprocess.call ? Subprocess.call seems to allow for a more readable script, since I can write the command like this : cmdLine = ['mencoder', sourceVideo, '-ovc', 'copy', '-oac', 'copy', '-ss', '00:02:54',