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time-base in FFmpeg · GitHub
https://gist.github.com/yohhoy/50ea5fe868a2b3695e19
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented. For fixed-fps content, timebase should be 1/framerate and timestamp increments should be identically 1. encoding: MUST …
What is video timescale, timebase, or timestamp in …
https://stackoverflow.com/questions/43333542/what-is-video-timescale-timebase-or-timestamp-in-ffmpeg
FFmpeg shows the timescale as the tbn value in the readout of a stream. Timebase = 1/75; Timescale = 75 Frame pts pts_time 0 0 0 x 1/75 = 0.00 1 3 3 x 1/75 = 0.04 2 6 6 x 1/75 = 0.08 3 9 9 x 1/75 = 0.12 ... This method of regulating time allows variable frame-rate video. answered Apr 11 '17 at 5:12.
ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html
The time base is copied to the output encoder from the corresponding input decoder. -1. Try to make the choice automatically, in order to generate a sane output. Default value is -1. -enc_time_base[:stream_specifier] timebase (output,per-stream) Set the encoder timebase. timebase is a floating point number, and can assume one of the following values: 0
FFmpeg Codecs Documentation
https://ffmpeg.org/ffmpeg-codecs.html
time_base rational number. Set codec time base. It is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented. For fixed-fps content, timebase should be 1 / frame_rate and timestamp increments should be identically 1. g integer (encoding,video) Set the group of picture (GOP) size. Default value is 12. ar integer (decoding/encoding,audio)
ffmpeg tutorial - dranger.com
http://dranger.com/ffmpeg/tutorial05.html
The time_base value of the stream is going to be 1/framerate (for fixed-fps content), so to get the PTS in seconds, we multiply by the time_base. Coding: Synching and using the PTS So now we've got our PTS all set. Now we've got to take care of the two synchronization problems we …
HLS Packaging using FFmpeg – Easy Step-by ... - OTTVerse
https://ottverse.com/hls-packaging-using-ffmpeg-live-vod/
hls_time seconds: We need to use this ... FFmpeg takes these video-audio combinations and creates the individual variants’ .m3u8 files with the name stream_%v.m3u8 where %v is an iterator that takes its value from the stream number being packaged. ... hls_base_url baseurl: ...
ffmpeg # 几个关键结构体的dts和pts的time_base - 简书
https://www.jianshu.com/p/44c767498ff9
Some formats misuse * the terms dts and pts/cts to mean something different. Such timestamps * must be converted to true pts/dts before they are stored in AVPacket. */ int64_t pts; /** * Decompression timestamp in AVStream->time_base units; the time at which * the packet is decompressed.
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