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What FFMPEG command will overlay 2 audio files at a ...
https://stackoverflow.com/questions/61561108/what-ffmpeg-command-will-overlay-2-audio-files-at-a-specific-timestamp
What ffmpeg command will create a new audio file from overlaying 2 audio files at a specific, non-zero timestamp? For example: Imagine 2 audio files, File A and File B, that both last for 10 seco...
mjbshaw: Seeking in FFmpeg: Know Your Timestamp!
http://www.mjbshaw.com/2012/04/seeking-in-ffmpeg-know-your-timestamp.html
For audio, it's more accurate to track the number of samples you've decoded and use the number of samples as a timestamp value than trusting in a DTS/PTS decoded from a frame. When I was writing a decoding plugin that used FFmpeg, I ignored the audio sample count and instead used the reported DTS/PTS values to keep track of when each audio ...
How to Extract Audio from Video Using FFmpeg
https://www.leawo.org/entips/how-to-extract-audio-from-video-using-ffmpeg-1400.html
-ss is the start of the extracted audio timestamp, and -t is the audio duration. By using this command, you will be able to extract a certain portion of source audio file from video files using FFmpeg. Part 2: Extract audio from video using best FFmpeg's alternative
What is video timescale, timebase, or timestamp in …
https://stackoverflow.com/questions/43333542/what-is-video-timescale-timebase-or-timestamp-in-ffmpeg
Modern containers govern the time component of presentation of video (and audio) frames using timestamps, rather than framerate. So, instead of recording a video as 25 fps, and thus implying that each frame should be drawn 0.04 seconds apart, they store a timestamp for each frame e.g.
ffmpeg Documentation
https://ffmpeg.org/ffmpeg.html
ffmpeg is a very fast video and audio converter that can also grab from a live audio/video source. It can also convert between arbitrary sample rates and resize video on the fly with a high quality polyphase filter. ... If the argument consists of timestamps, ffmpeg will round the specified times to the nearest output timestamp as per the ...
Using ffmpeg to cut out a scene by original timestamp ...
https://video.stackexchange.com/questions/13345/using-ffmpeg-to-cut-out-a-scene-by-original-timestamp
With this information, you can easily calculate the values for ffmpeg's -ss and -to parameters: Let b be the stream start timestamp (here 81824.820733) Let s be the desired start timestamp (here 81953.624278) Let e be the desired end timestamp (here 87259.194348) The relative starting point (in seconds) is s - b = 81953.624278 - 81824.820733 ...
ffmpeg - Trim audio file using start and stop times - Unix ...
https://unix.stackexchange.com/questions/182602/trim-audio-file-using-start-and-stop-times
ffmpeg seems to have a new option -to in the documentation:-to position (input/output) Stop writing the output or reading the input at position.position must be a time duration specification, see (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual.-to and -t are mutually exclusive and -t has priority.
video - Timestamps are unset in a packet for stream 0 ...
https://video.stackexchange.com/questions/24462/timestamps-are-unset-in-a-packet-for-stream-0-this-is-deprecated-and-will-stop
While executing the FFmpeg command, there is a warning showing as [rtsp @ 0xb754bda0] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly. IS there any option available in FFmpeg to add timestamp in RTP packet and push the video and audio?
FFmpeg Formats Documentation
https://ffmpeg.org/ffmpeg-formats.html
You can select the output format of each frame with ffmpeg by specifying the audio and video codec and format. For example to compute the CRC of the input audio converted to PCM unsigned 8-bit and the input video converted to MPEG-2 video, use the command: ffmpeg -i INPUT -c:a pcm_u8 -c:v mpeg2video -f crc -.
How to recreate timestamps without reencoding : ffmpeg
https://www.reddit.com/r/ffmpeg/comments/ggnnfx/how_to_recreate_timestamps_without_reencoding/
This is the command I used to get audio levels for the whole video. It generates a file with sound level info for 2264 frames: ffmpeg -i clip1.mp4 -af astats=metadata=1:reset=1,ametadata=print:key=lavfi.astats.Overall.RMS_level:file=audio-log.txt -f …
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