FFmpeg Common basic Commands (RPM)

FFmpeg Common basic Commands (RPM)

"FFmpeg" FFmpeg common basic commands

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/ /Separate audio streams

2. Video re-use

Ffmpeg–i test.mp4–vcodec copy–an–f m4v test.264ffmpeg–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//Transcode to stream 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 picture Ffmpeg-ss 0:1:30-t 0:0:20-i input.avi-vcodec Copy-acode C 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 setting screen ratio Example-VN does not process video-vcodec set video codec, without timing the same codec audio parameters as the input stream:-ar Set Sample rate-ac set the channel number of sound-acodec set sound codec, not set timing is the same as the input stream Codec-an does not process 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  baseline rtmp://server/live/baseline_500k -acodec copy -vcodec x264lib -s  480x272 -b 300k -vpre medium -vpre baseline rtmp://server/live/baseline_ 300k -acodec copy -vcodec x264lib -s 320x200 -b 150k -vpre  medium -vpre baseline rtmp://server/live/baseline_150k -acodec libfaac -vn  -ab 48k rtmp://server/live/audio_only_aac_48k 

< Span style= "color: #444444; line-height:22.39px; Font-family:verdanna,helvetica,arial,sans-serif; font-size:14px; " >

ffmpeg -re -i rtmp://server/live/high_fmle_stream -c:a copy - c:v x264lib -s 640x360 -x264opts bitrate=500:profile=baseline:preset=slow rtmp:/ /server/live/baseline_500k -c:a copy -c:v x264lib -s 480x272 -x264opts  bitrate=300:profile=baseline:preset=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 

< Span style= "color: #444444; line-height:22.39px; Font-family:verdanna,helvetica,arial,sans-serif; font-size:14px; " >< Span style= "color: #444444; line-height:22.39px; Font-family:verdanna,helvetica,arial,sans-serif; font-size:14px; " >8, the current camera and audio through Dsshow capture , video h264, audio FAAC compressed post

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 

< Span style= "color: #444444; line-height:22.39px; Font-family:verdanna,helvetica,arial,sans-serif; font-size:14px; " > picture after H264 compression loop 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 -qdiff 4 -flags2 +dct8x8 -trellis 2 -partitions + parti8x8+parti4x4 -crf 24 -threads 0 -r 25 -g 25 -y  Output.mp4 

< Span style= "color: #444444; line-height:22.39px; Font-family:verdanna,helvetica,arial,sans-serif; font-size:14px; " >

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

FFmpeg Common basic Commands (RPM)