User:Joger/FFmpeg: Difference between revisions
Jump to navigation
Jump to search
No edit summary |
No edit summary |
||
| Line 5: | Line 5: | ||
*<tt>'''-v error'''</tt> suppresses FFprobe's header and decoding information, so we only see the interesting output information. | *<tt>'''-v error'''</tt> suppresses FFprobe's header and decoding information, so we only see the interesting output information. | ||
*<tt>-print_format json</tt> | *<tt>'''-print_format json'''</tt> makes the output easier to read. | ||
*<tt>-select_streams v</tt> | *<tt>'''-select_streams v'''</tt> will only print '''v'''ideo streams. It can be replaced by <tt>'''a'''</tt> to show only '''a'''udio streams or '''s''' to show only '''s'''ubtitle streams. | ||
==FFMpeg == | ==FFMpeg == | ||
Revision as of 10:47, 25 August 2024
FFProbe
FFProbe is used to inspect media, for example to view format or stream information. You can use the following command line to view a file's format and stream information. It will print out information about the file's streams, such as video and audio streams, as well as the container format.
ffprobe -v error -show_streams -show_format -print_format json <name_of_media>
Useful options
- -v error suppresses FFprobe's header and decoding information, so we only see the interesting output information.
- -print_format json makes the output easier to read.
- -select_streams v will only print video streams. It can be replaced by a to show only audio streams or s to show only subtitle streams.
FFMpeg
Low latency streaming
> mediamtx > ffmpeg -filter_complex ddagrab=video_size=1024x890:output_idx=0:framerate=60,hwdownload,format=bgra -fflags nobuffer -vcodec libx264 -tune zerolatency -f rtsp rtsp://127.0.0.1:8554/webcam.h264 > ffplay rtsp://127.0.0.1:8554/webcam.h264 -fflags nobuffer -flags low_delay -framedrop