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I am trying A.mp4,B.mp4,C.mp4 files to be concated in sequence into D.mp4.

I tried variety of concat commands but its not working well, and audio , video are not synch. Also D.mp4 is going large in size and time.

Pls provide a sample that can work on c#.Net. My code is

string c1 = " -i " + video1 + " -c copy -bsf:v h264_mp4toannexb -f mpegts " + t1;// +" && ";
string c2 = " -i " + video2 + " -c copy -bsf:v h264_mp4toannexb -f mpegts " + t2;// + " && ";
string c3 = " -i " + video3 + " -c copy -bsf:v h264_mp4toannexb -f mpegts " + t3;// + " && ";
string ct = " -i \"concat:" + t1+ "|"+t2+ "|" +t3+"\" -c copy -bsf:a aac_adtstoasc "+strResult;

Thanks in Advance Bhupendra

Bhupendra S Rao
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    Pls provide a sample that u tried on c#.Net. – Caius Jard Jul 16 '21 at 18:55
  • @CaiusJard I am using below commands - string c1 = " -i " + video1 + " -c copy -bsf:v h264_mp4toannexb -f mpegts " + t1;// +" && "; string c2 = " -i " + video2 + " -c copy -bsf:v h264_mp4toannexb -f mpegts " + t2;// + " && "; string c3 = " -i " + video3 + " -c copy -bsf:v h264_mp4toannexb -f mpegts " + t3;// + " && "; string ct = " -i \"concat:" + t1+ "|"+t2+ "|" +t3+"\" -c copy -bsf:a aac_adtstoasc "+strResult; – Bhupendra S Rao Jul 19 '21 at 09:31

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