How to set sample_aspect_ratio while muxing a video stream?












0














I am trying to mux a video stream and an audio stream into an mp4 file, whereas the target file has an inappropriate sar (unlike the source one).



The following methods don't make any sense.
1、Using avcodec_copy_context(). It cannot set the target sar as the source.



2、Setting sar directly of the target stream. The target sar is not the one I've set in the video stream before writeHeader.



The version I used is 2.8.1.










share|improve this question
























  • Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
    – the kamilz
    Nov 23 at 9:00










  • Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
    – li hu
    Nov 27 at 3:10
















0














I am trying to mux a video stream and an audio stream into an mp4 file, whereas the target file has an inappropriate sar (unlike the source one).



The following methods don't make any sense.
1、Using avcodec_copy_context(). It cannot set the target sar as the source.



2、Setting sar directly of the target stream. The target sar is not the one I've set in the video stream before writeHeader.



The version I used is 2.8.1.










share|improve this question
























  • Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
    – the kamilz
    Nov 23 at 9:00










  • Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
    – li hu
    Nov 27 at 3:10














0












0








0







I am trying to mux a video stream and an audio stream into an mp4 file, whereas the target file has an inappropriate sar (unlike the source one).



The following methods don't make any sense.
1、Using avcodec_copy_context(). It cannot set the target sar as the source.



2、Setting sar directly of the target stream. The target sar is not the one I've set in the video stream before writeHeader.



The version I used is 2.8.1.










share|improve this question















I am trying to mux a video stream and an audio stream into an mp4 file, whereas the target file has an inappropriate sar (unlike the source one).



The following methods don't make any sense.
1、Using avcodec_copy_context(). It cannot set the target sar as the source.



2、Setting sar directly of the target stream. The target sar is not the one I've set in the video stream before writeHeader.



The version I used is 2.8.1.







ffmpeg mux sar






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 27 at 3:12

























asked Nov 21 at 4:51









li hu

185




185












  • Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
    – the kamilz
    Nov 23 at 9:00










  • Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
    – li hu
    Nov 27 at 3:10


















  • Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
    – the kamilz
    Nov 23 at 9:00










  • Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
    – li hu
    Nov 27 at 3:10
















Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
– the kamilz
Nov 23 at 9:00




Perhaps you should update your FFmpeg first, many things changed since, 2.8.1 is quite old.
– the kamilz
Nov 23 at 9:00












Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
– li hu
Nov 27 at 3:10




Yes, you're right. When updated FFMPEG to 3.4.1, everything goes well.
– li hu
Nov 27 at 3:10

















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