[FFmpeg-user] (no subject)

negin tebyani negin.tebyani at gmail.com
Mon Apr 17 14:15:14 EEST 2017


I have two videos that I encoded them with ffmpeg, like:

ffmpeg -i 1_med.mp4 -movflags faststart -c:v libx264 -x264opts
'keyint=100:min-keyint=25:no-scenecut:8x8dct:sliced-threads=0' -deblock 1:1
-flags +loop -b:v 850k -maxrate 850k -bufsize 2000k -nal-hrd cbr -vf
"scale=-1280:720:flags=spline+full_chroma_inp+full_chroma_int+accurate_rnd+bitexact"
-acodec libfdk_aac -b:a 320k -coder 1 -me_range 16 -bf 10 -q:v 1 -qmin 0
-qmax 69 -trellis 2 -mbtree 1 -mixed-refs 1 -preset veryslow medfull.mp4


ffmpeg -i 1_high.mp4 -movflags faststart -c:v libx264 -x264opts
'keyint=100:min-keyint=25:no-scenecut:8x8dct:sliced-threads=0' -deblock 1:1
-flags +loop -b:v 1024k -maxrate 1024k -bufsize 2500k -nal-hrd cbr -vf
"scale=-1280:720:flags=spline+full_chroma_inp+full_chroma_int+accurate_rnd+bitexact"
-acodec libfdk_aac -b:a 320k -coder 1 -me_range 16 -bf 10 -q:v 1 -qmin 0
-qmax 69 -trellis 2 -mbtree 1 -mixed-refs 1 -preset veryslow highfull.mp4

according to mp4box tutorials that I have read about making mpeg-dash, I
know that I have to set keyint and minkey int equal and also related to
segment duration. so I tries using min-keyint=100, but the result video had
the min-keyint=51

so I returned to 25. because the FPS is 25 also.

how can I fix this?? my final dash video has some frame freezes, and i
think it is related to this issue.


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