The command ffmpeg -ss 00:00:25 -t 00:00:00.04 -i YOURMOVIE.MP4 -r 25.0 YOURIMAGE%4d.jpg will extract frames beginning at second 25 [-ss 00:00:25] stopping after 0.04 second [-t 00:00:00.04] reading from input file YOURMOVIE.MP4 using only 25.0 frames per second, i. e. one frame every 1/25 seconds [-r 25.0] as JPEG images with the names YOURIMAGE%04d.jpg, where … Read more
This works with recent FFmpeg: ffmpeg -i input.mp4 -c copy -metadata:s:v:0 rotate=90 output.mp4 This will stream copy the bitstreams, so no encoding is performed. Only the metadata of the first video stream (v:0) is changed here and the player will show the video in a rotated way. (Not all players will support this.) Additional notes: … Read more
Concatenation of files with same codecs: There are two methods within ffmpeg that can be used to concatenate files of the same type: the concat demuxer & the concat protocol The demuxer is more flexible – it requires the same codecs, but different container formats can be used; and it can be used with any … Read more
you can try: ffmpeg -i a.ogg -ss 00:01:02.500 -t 00:01:03.250 -c copy x2.ogg Timestamps need to be in HH:MM:SS.xxx format for advanced precision (where xxx are milliseconds). Let me know if it works.
I’ve cobbled up this command line from various answers that works great for me to get the absolutely first frame out from a video. I use this to save a thumbnail screenshot for the video. ffmpeg -i inputfile.mkv -vf “select=eq(n\,0)” -q:v 3 output_image.jpg Explanation: The select filter -vf “select=eq(n\,0)” is to select only frame #0. … Read more
You can use FFserver to stream a video using RTSP. Just change console syntax to something like this: ffmpeg -i space.mp4 -vcodec libx264 -tune zerolatency -crf 18 http://localhost:1234/feed1.ffm Create a ffserver.config file (sample) where you declare HTTPPort, RTSPPort and SDP stream. Your config file could look like this (some important stuff might be missing): HTTPPort … Read more
Use the following command: ffmpeg -ss 0 -t 30 -i file.mp3 file.wav -ss 0 – Start at 0 seconds -t 30 – Capture 30 seconds (from 0, so 0:00 – 0:30). If you want 1 minute of audio, use -t 60. file.mp3 – Input file file.wav – output file
Try using a lossless codec, e.g. HuffYUV or FFV1: ffmpeg -i frame%04d.png -c:v huffyuv test.avi ffmpeg -i frame%04d.png -c:v ffv1 -qscale:v 0 test.avi Both codecs look portable. HuffYUV appears to be the more popular, but for some reason, huffyuv encoding seems broken on my system, and I get weird colors and black horizontal banding. It … Read more
That just means that ffmpeg has not seen a keyframe yet, which carries SPS and PPS information. SPS and PPS are crucial in decoding an incoming frame/slice. Keyframes are sent periodically (i.e. every 5-10 seconds or more); so if it turns out that you joined a stream before the keyframe arrived; you will see this … Read more
With Recent version, ffmpeg -i in.mp3 -i test.png -map 0:0 -map 1:0 -c copy -id3v2_version 3 -metadata:s:v title=”Album cover” -metadata:s:v comment=”Cover (front)” out.mp3 Use -map to associate input stream to the output Use -c copy to directly demux/remux The -id3v2_version 3 is what is missing in your command line. Note that that wil write an … Read more