How to control the palying speed?

[wujilingfeng]

Will the function of "av_read_frame" run by prescribed speed?

[leandromoreira]

Hi @wujilingfeng I don't if I understood your question but the av_read_frame do not accept a timeout, if you want to control the speed you get frames from it, you should control the pace you request a new frame.

[wujilingfeng]

Hi @leandromoreira I want to render the video, but I'm not sure it will read at the default speed ？

[wujilingfeng]

Hi @leandromoreira If the function of "av_read_frame" read all frames in one second， will the opengl play the video in one second? Actually, I want to known how to render the video in opengl? Do you have any fresh evidence?

[wujilingfeng]

Hi @leandromoreira ,I've already run this demo of "helloworld.c", It did finish the job in a flash . So how to render the video with opengl at the default speed?How to get the information about default speed of the video?

[leandromoreira]

@wujilingfeng maybe the ffprobe (ffmpeg's player) will be a better example as a player for you. And they seem to be using SDL. And there's also a good tutorial on how to build a ffmpeg player.

[wujilingfeng]

OK.Thankyou. I think I need control it by hand.