I used to do a lot of this stuff when i worked in the industry, I used mencoder personally (which I then wrapped into a VB.NET app to poll the directory for new files and auto encode them when they were delivered) but FFMPEG is the most popular. MP4 and MOV are just containers that … Read more
I fixed by uninstalling both mbedtls and librist and then reinstalling ffmpeg as described here brew uninstall librist –ignore-dependencies brew uninstall mbedtls –ignore-dependencies brew reinstall ffmpeg
This answer was posted (under the CC BY-SA 4.0 license) as a comment by Gyan to the question Convert videos from .264 to .265 (HEVC) with ffmpeg. Run this command for x265 conversion: ffmpeg -i input.mp4 -c:v libx265 -vtag hvc1 output.mp4
Use ffprobe Example command $ ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=nokey=1:noprint_wrappers=1 input.mp4 Result h264 Option descriptions -v error Omit extra information except for fatal errors. -select_streams v:0 Select only the first video stream. Otherwise the codec_name for all other streams in the file, such as audio, will be shown as well. -show_entries … Read more
Use the -t option to specify a time limit: `-t duration’ Restrict the transcoded/captured video sequence to the duration specified in seconds. hh:mm:ss[.xxx] syntax is also supported. http://www.ffmpeg.org/ffmpeg.html
You can display the timestamp for each frame with ffprobe with awk to only output key frame info. Works in Linux and macOS. ffprobe -loglevel error -select_streams v:0 -show_entries packet=pts_time,flags -of csv=print_section=0 input.mp4 | awk -F’,’ ‘/K/ {print $1}’ Or a slower method that works on any OS and does not require awk or similar … Read more
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
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