What is av_opt_set in FFMPEG
I am looking at some code base to encode videos in LibAV. I am unable to understand the purpose of these two lines:
av_opt_set(context->priv_data, "tune", "zerolatency", 0);
av_opt_set(context->priv_data, "preset", "fast", 0);
Here, context is AVCodecContext.
I am new to this library and would appreciate a descriptive answer.
c++ c++11 ffmpeg libavcodec libav
asked Nov 11 at 17:37
random_28
728515
add a comment |
I am looking at some code base to encode videos in LibAV. I am unable to understand the purpose of these two lines:
av_opt_set(context->priv_data, "tune", "zerolatency", 0);
av_opt_set(context->priv_data, "preset", "fast", 0);
Here, context is AVCodecContext.
I am new to this library and would appreciate a descriptive answer.
c++ c++11 ffmpeg libavcodec libav
asked Nov 11 at 17:37
random_28
728515
1
Perhaps you should read the documentation? ffmpeg.org/doxygen/2.4/group__opt__set__funcs.html
– Retired Ninja
Nov 11 at 17:59
add a comment |
I am looking at some code base to encode videos in LibAV. I am unable to understand the purpose of these two lines:
av_opt_set(context->priv_data, "tune", "zerolatency", 0);
av_opt_set(context->priv_data, "preset", "fast", 0);
Here, context is AVCodecContext.
I am new to this library and would appreciate a descriptive answer.
c++ c++11 ffmpeg libavcodec libav
asked Nov 11 at 17:37
random_28
728515
I am looking at some code base to encode videos in LibAV. I am unable to understand the purpose of these two lines:
av_opt_set(context->priv_data, "tune", "zerolatency", 0);
av_opt_set(context->priv_data, "preset", "fast", 0);
Here, context is AVCodecContext.
I am new to this library and would appreciate a descriptive answer.
c++ c++11 ffmpeg libavcodec libav
c++ c++11 ffmpeg libavcodec libav
asked Nov 11 at 17:37
random_28
728515
asked Nov 11 at 17:37
random_28
728515
asked Nov 11 at 17:37
random_28
728515
asked Nov 11 at 17:37
random_28
728515
asked Nov 11 at 17:37
random_28
728515
728515
1
Perhaps you should read the documentation? ffmpeg.org/doxygen/2.4/group__opt__set__funcs.html
– Retired Ninja
Nov 11 at 17:59
add a comment |
1
Perhaps you should read the documentation? ffmpeg.org/doxygen/2.4/group__opt__set__funcs.html
– Retired Ninja
Nov 11 at 17:59
1
1
Perhaps you should read the documentation? ffmpeg.org/doxygen/2.4/group__opt__set__funcs.html
– Retired Ninja
Nov 11 at 17:59
Perhaps you should read the documentation? ffmpeg.org/doxygen/2.4/group__opt__set__funcs.html
– Retired Ninja
Nov 11 at 17:59
add a comment |
1 Answer
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That's a utility function to set the value of defined AVOption members in the struct ref passed in the first arg. The 2nd arg is the member and the 3rd is the value. The 4th arg is a search flag that tells the fn whether to search child structs.
See https://www.ffmpeg.org/doxygen/trunk/group__opt__set__funcs.html
and https://www.ffmpeg.org/doxygen/trunk/group__avoptions.html
answered Nov 11 at 18:01
Gyan
30.8k22668
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That's a utility function to set the value of defined AVOption members in the struct ref passed in the first arg. The 2nd arg is the member and the 3rd is the value. The 4th arg is a search flag that tells the fn whether to search child structs.
See https://www.ffmpeg.org/doxygen/trunk/group__opt__set__funcs.html
and https://www.ffmpeg.org/doxygen/trunk/group__avoptions.html
answered Nov 11 at 18:01
Gyan
30.8k22668
add a comment |
That's a utility function to set the value of defined AVOption members in the struct ref passed in the first arg. The 2nd arg is the member and the 3rd is the value. The 4th arg is a search flag that tells the fn whether to search child structs.
See https://www.ffmpeg.org/doxygen/trunk/group__opt__set__funcs.html
and https://www.ffmpeg.org/doxygen/trunk/group__avoptions.html
answered Nov 11 at 18:01
Gyan
30.8k22668
add a comment |
That's a utility function to set the value of defined AVOption members in the struct ref passed in the first arg. The 2nd arg is the member and the 3rd is the value. The 4th arg is a search flag that tells the fn whether to search child structs.
See https://www.ffmpeg.org/doxygen/trunk/group__opt__set__funcs.html
and https://www.ffmpeg.org/doxygen/trunk/group__avoptions.html
answered Nov 11 at 18:01
Gyan
30.8k22668
That's a utility function to set the value of defined AVOption members in the struct ref passed in the first arg. The 2nd arg is the member and the 3rd is the value. The 4th arg is a search flag that tells the fn whether to search child structs.
See https://www.ffmpeg.org/doxygen/trunk/group__opt__set__funcs.html
and https://www.ffmpeg.org/doxygen/trunk/group__avoptions.html
answered Nov 11 at 18:01
Gyan
30.8k22668
answered Nov 11 at 18:01
Gyan
30.8k22668
answered Nov 11 at 18:01
Gyan
30.8k22668
answered Nov 11 at 18:01
Gyan
30.8k22668
30.8k22668
add a comment |
add a comment |
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Perhaps you should read the documentation? ffmpeg.org/doxygen/2.4/group__opt__set__funcs.html
– Retired Ninja
Nov 11 at 17:59