I tried to cancenate two mp4 files from YouTube. The "Demuxer" method (ffmpeg -f concat -i mylist.txt -c copy output) lead to wrong video at the second part (all-time squares, noncontinuity) without any warning. The "Protocol" method:
ffmpeg -i 1.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts 1.ts ffmpeg -i 2.mp4 -c copy -bsf:v h264_mp4toannexb -f mpegts 2.ts ffmpeg -i "concat:1.ts|2.ts" -c copy -bsf:a aac_adtstoasc 1-2p.mp4 lead to 4 warnings "Non-monotonous DTS in output stream". The resulting video seems to by OK in Avidemux or KMPlayer but not in Firefox - there are short-time problems (squares, noncontinuity) at the second part every couple od seconds (looks at I-frames). Any hint how to solve the problem (e.g., to repair the non-monotonous DTS)? Files can be found on http://webshare.cz/group/1vj5Be2GJ8/. ludolf _______________________________________________ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user