Ask a Question

FFmpeg extracting current frame time stamp

in Education by
I need to extract frames in certain interval of the video, (eg from 40 sec to 50 sec). Working in c++. First I am getting position where I need to start reading static double t = 10 ;//time in seconds int64_t timestamp = t * AV_TIME_BASE; //destination time av_seek_frame( pFormatContext , -1 , timestamp + pFormatContext->start_time ,AVSEEK_FLAG_BACKWARD ); Then I using av_read_frame to get all sequential frames. The problem that I have is that I dont know when to stop. How can I check that I reached my end interval (eg 50 sec) ? Thanks. JavaScript questions and answers, JavaScript questions pdf, JavaScript question bank, JavaScript questions and answers pdf, mcq on JavaScript pdf, JavaScript questions and solutions, JavaScript mcq Test , Interview JavaScript questions, JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)

1 Answer

0 votes
by
av_read_frame() will give you a PTS (Presentation Time Stamp). It is AVPacket's member pts. Perhaps that value can help you decide when to stop reading.

Related questions

0 votes
Q: If the programmers want the output to be a data frame or a vector, then ________ function is used.
    If the programmers want the output to be a data frame or a vector, then ________ function is used. (a) ... Debugging of R Programming Select the correct answer from above options...
asked Feb 13, 2022 in Education by JackTerrance
0 votes
Q: __________ package is used to speed up data frame management code.
    __________ package is used to speed up data frame management code. (a) Data.table (b) Dplyr (c) Table ( ... Debugging of R Programming Select the correct answer from above options...
asked Feb 12, 2022 in Education by JackTerrance
0 votes
Q: Which of the following lists names of variables in a data.frame?
    Which of the following lists names of variables in a data.frame? (a) quantile() (b) names() (c) ... Linear Regression of R Programming Select the correct answer from above options...
asked Feb 11, 2022 in Education by JackTerrance
0 votes
Q: ______ splits a data frame and results an array (hence the da). Hopefully you’re getting the idea here.
    ______ splits a data frame and results an array (hence the da). Hopefully you're getting the idea here. ... Regression of R Programming Select the correct answer from above options...
asked Feb 11, 2022 in Education by JackTerrance
0 votes
Q: To get the current date, the _______ function will return a Date object which can be converted to a different class if necessary.
    To get the current date, the _______ function will return a Date object which can be converted to a different ... of R Programming Select the correct answer from above options...
asked Feb 16, 2022 in Education by JackTerrance
0 votes
Q: The current user defined objects like lists, vectors, etc. is referred to as __________ in the R language.
    The current user defined objects like lists, vectors, etc. is referred to as __________ in the R language. ( ... of R Programming Select the correct answer from above options...
asked Feb 15, 2022 in Education by JackTerrance
0 votes
Q: Write the syntax to set the path of the current working directory in R environment?
    Write the syntax to set the path of the current working directory in R environment? (a) Setwd( dipath ) ... Debugging of R Programming Select the correct answer from above options...
asked Feb 13, 2022 in Education by JackTerrance
0 votes
Q: How to include JSON file/object inside C++ at build time
    I have a JSON File with database environment configuration called env-config.json like this: { "LATEST":{ ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked Apr 17, 2022 in Education by JackTerrance
0 votes
Q: I want to enter an integer in a variable within for loop using scanf and the same time if i enter a char on same variable it should display
    Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked Apr 2, 2022 in Education by JackTerrance
0 votes
Q: ________ makes it incredibly easy to fit time series models like ARIMA, ARMA, AR, Exponential Smoothing, etc.
    ________ makes it incredibly easy to fit time series models like ARIMA, ARMA, AR, Exponential Smoothing, etc. (a ... of R Programming Select the correct answer from above options...
asked Feb 12, 2022 in Education by JackTerrance
0 votes
Q: Which of the following is used to analyze paleontological time-series?
    Which of the following is used to analyze paleontological time-series? (a) accelerometry (b) parfossil (c) ... of R Programming Select the correct answer from above options...
asked Feb 11, 2022 in Education by JackTerrance
0 votes
Q: Concatenating multiple mp4 files with FFMPEG is giving buggy output file
    Hi I'm using ffmpeg to concatenate several mp4 files that I downloaded. Usually they don't have the ... Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked Apr 16, 2022 in Education by JackTerrance
0 votes
Q: Getting black blank image when extracting a thumbnail from a video
    I am trying to get a thumbnail image from a video from a URL using AVFoundation but I am getting ... JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked May 13, 2022 in Education by JackTerrance
0 votes
Q: How to auto extracting nested json in which few json object nested json object but can be parsed with __dict__
    object looks like as below { "id":1, "image":"path/to/image", "employee_data":, } again ... JavaScript Questions for Interview, JavaScript MCQ (Multiple Choice Questions)...
asked May 13, 2022 in Education by JackTerrance

© Copyright 2018-2023 www.Blogmepost.com. All rights reserved. Developed by Blogmepost.

...