Basic commands for FFmpeg

1. Separating the video audio stream
Ffmpeg-i input_file-vcodec Copy-an output_file_video//split video stream
Ffmpeg-i input_file-acodec copy-vn output_file_audio//Split audio stream
2. Video re-use
Ffmpeg–i Test.mp4–vcodec copy–an–f M4V test.264
Ffmpeg–i Test.avi–vcodec copy–an–f M4V test.264
3. Video transcoding
Ffmpeg–i test.mp4–vcodec h264–s 352*278–an–f m4v test.264//transcoding to bitstream original file
Ffmpeg–i test.mp4–vcodec h264–bf 0–g 25–s 352*278–an–f m4v test.264//transcoding to bitstream original file
Ffmpeg–i test.avi-vcodec Mpeg4–vtag xvid–qsame Test_xvid.avi//transcoding to package file
-BF b Frame number control,-g key frame interval control,-s resolution control
4. Video Encapsulation
Ffmpeg–i video_file–i audio_file–vcodec copy–acodec copy output_file
5. Video Clipping
Ffmpeg–i test.avi–r 1–f image2 image-%3d.jpeg//Extract Pictures
Ffmpeg-ss 0:1:30-t 0:0:20-i input.avi-vcodec copy-acodec copy output.avi//Cut Video
-R Extract the frequency of the image,-ss start time,-t duration
6. Video recording
Ffmpeg–i Rtsp://192.168.3.205:5555/test–vcodec Copy Out.avi
7.YUV sequence Playback
Ffplay-f rawvideo-video_size 1920x1080 INPUT.YUV
8.YUV sequence turn avi
Ffmpeg–s w*h–pix_fmt yuv420p–i input.yuv–vcodec MPEG4 Output.avi
Common parameter Description:
Main parameters:-I set input stream-F Set output format-ss start time video parameter:-B Set Video traffic, default to 200KBIT/S-R set frame rate, default to 25-s setting screen width and height-aspect set screen ratio-vn do not process video-vcode C Set the video codec, without timing use the same codec audio parameters as the input stream:-ar Set sampling rate-AC set the channel number of sound-acodec set the sound codec, without timing the same codec with the input stream-an not processing audio
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1. Send files to live as Live
Ffmpeg-re-i localfile.mp4-c copy-f flv rtmp://server/live/streamname
2. Save the live media to a local file

Ffmpeg-i rtmp://server/live/streamname-c Copy dump.flv
3, one of the live stream, video instead of H264 compression, audio unchanged, sent to another live streaming service

Ffmpeg-i rtmp://server/live/originalstream-c:a copy-c:v libx264-vpre slow-f flv rtmp://server/live/h264stream

4, one of the live stream, video instead of H264 compression, audio instead of FAAC compression, sent to another live streaming service
Ffmpeg-i rtmp://server/live/originalstream-c:a libfaac-ar 44100-ab 48k-c:v libx264-vpre slow-vpre baseline-f flv r Tmp://server/live/h264stream
5, one of the live stream, the video is unchanged, the audio instead of FAAC compression, sent to another live streaming service
Ffmpeg-i rtmp://server/live/originalstream-acodec libfaac-ar 44100-ab 48k-vcodec copy-f flv rtmp://server/live/h264_ Aac_stream
6, will a high stream, copied to several different video definition of the flow re-release, where the audio does not change
Ffmpeg-re-i rtmp://server/live/high_fmle_stream-acodec copy-vcodec x264lib-s 640x360-b 500k-vpre Medium-vpre Basel Ine Rtmp://server/live/baseline_500k-acodec copy-vcodec x264lib-s 480x272-b 300k-vpre medium-vpre Baseline rtmp://se Rver/live/baseline_300k-acodec copy-vcodec x264lib-s 320x200-b 150k-vpre medium-vpre Baseline Rtmp://server/live/bas Eline_150k-acodec Libfaac-vn-ab 48k rtmp://server/live/audio_only_aac_48k
7, the same function, just use the-x264opts option
Ffmpeg-re-i rtmp://server/live/high_fmle_stream-c:a copy-c:v x264lib-s 640x360-x264opts Bitrate=500:profile=baselin E:preset=slow rtmp://server/live/baseline_500k-c:a copy-c:v x264lib-s 480x272-x264opts bitrate=300:profile=baseline :p reset=slow rtmp://server/live/baseline_300k-c:a copy-c:v x264lib-s 320x200-x264opts bitrate=150:profile=baseline: Preset=slow rtmp://server/live/baseline_150k-c:a libfaac-vn-b:a 48k rtmp://server/live/audio_only_aac_48k
8, the current camera and audio through Dsshow acquisition, video H264, audio FAAC compressed after release
Ffmpeg-r 25-f dshow-s 640x480-i video= "video Source name": audio= "audio source name"-vcodec libx264-b 600k-vpre Slow -acodec libfaac-ab 128k-f flv rtmp://server/application/stream_name
9, a JPG image through the H264 compression cycle output to MP4 video
Ffmpeg.exe-i input.jpg-an-vcodec libx264-coder 1-flags +loop-cmp +chroma-subq 10-qcomp 0.6-qmin 10-qmax 51-qdif F 4-flags2 +dct8x8-trellis 2-partitions +parti8x8+parti4x4-crf 24-threads 0-r 25-g 25-y OUTPUT.mp4
10, the normal stream video instead of H264 compression, audio unchanged, sent to the HD service (new version of FMS live=1)
Ffmpeg-i rtmp://server/live/originalstream-c:a copy-c:v libx264-vpre slow-f flv "Rtmp://server/live/h264stream live=1 〃
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1. Capture USB camera video commands:
Ffmpeg-t 20-f vfwcap-i 0-r 8-f mp4 cap1111.mp4

./ffmpeg-t 10-f vfwcap-i 0-r 8-f mp4 cap.mp4
The specific description is as follows: We collect 10 seconds, the acquisition device for the VFWCAP type equipment, the NO. 0 vfwcap acquisition Equipment (if the system has a number of VFW video capture equipment, can be selected through-I num), 8 frames per second, the output mode is a file, the format of MP4.

2. The simplest screen capture:
Ffmpeg-f gdigrab-i Desktop Out.mpg

3. Starting at the (10,20) point of the screen, grab the 640x480 screen and set the frame rate at 5:
Ffmpeg-f gdigrab-framerate 5-offset_x 10-offset_y 20-video_size 640x480-i Desktop Out.mpg

4.ffmpeg creating a GIF image from your video:
Ffmpeg-i capx.mp4-t 10-s 320x240-pix_fmt rgb24 jidu1.gif

5.ffmpeg convert a picture to a video:
Http://blog.sina.com.cn/s/blog_40d73279010113c2.html

Basic commands for FFmpeg