To update FFmpeg, just revisit the download page in step 1 above and download the zip file. Unpack the files and copy them over the old files in the folder you created in step 2. Using FFmpeg. Using FFmpeg requires that you open a command prompt window, then type FFmpeg specific commands. Here is a typical FFmpeg command:

2013年4月30日 · ffmpeg -i rtsp://@192.168.241.1:62156 -acodec copy -vcodec copy c:/abc.mp4 will not do transcoding and dump the file for you in an mp4. Of course this is assuming the streamed contents are compatible with an mp4 (which in all probability they are).

To have FFmpeg act as an HTTP server, you need to pass the -listen 1 option. Additionally, -f mp4 will result in a non-fragmented MP4, which is not suitable for streaming. You can get a fragmented MP4 with -movflags frag_keyframe+empty_moov .

2016年12月13日 · This parameters allows ffmpeg to process specific streams and can be provided multiple times. What I ended up doing is filtering the required streams using ffmpeg -map and piping the output to ffprobe -show_frames as follows: ffmpeg -i INPUT -map 0:0 -map 0:1 -c copy -f matroska - | ffprobe -show_frames - Several notes:

If I will run ffmpeg with -s 100x200, then second video will have bad aspect ratio. How can I limit output video by width, with auto aspect ratio by height? For example, I want specify for the output video only width 100px and ffmpeg must automatically calculate height with right aspect ratio.

2015年12月24日 · Did you solve your problem? I did video streaming with dvblast, send packets over UDP, and receive them with ffmpeg. Even set UDP packet sizes to 1316; But I get error: "PES packet size mismatch" regularly and output video is awful. –

2017年3月23日 · ffmpeg -i video.mp4 -f yuv4mpegpipe - | gifski -o clip.gif - It generates good per-frame palettes, but also combines palettes across frames, achieving even thousands of colors per frame. If you want to reduce the video dimensions, add a scaling filter (or --width in gifski):

2020年8月18日 · ffmpeg -i <srcfile> -vcodec libx264 -profile:v main -level 3.1 -preset slower -crf 18 -x264-params ref=4 -acodec copy -movflags +faststart <outfile> to convert some dashcam footage for viewing on an iOS device. The above command took about 30 min to complete on a 2017 Macbookpro with 16G of RAM. I want to speed it.

ffmpeg -f concat -safe 0 -i vidlist.txt -c copy output. In case it's not abundantly clear, replace output with the video filename you wish to produce (whether that be output.mp4, output.mkv, output.avi) ffmpeg will utilize the container indicated by the extension.

2014年10月31日 · I am trying to change the video stream metadata. See (Change This Metadata) below. I can change the title of the movie ok but not any others. What is the ffmpeg line to change this. This line below changes "Title Of The Movie" only. ffmpeg -i Input.mkv -metadata title="New Title" -c:v copy -c:a copy -c:s copy Output.mkv