Recherche avancée

Sur d’autres sites (17743)

• How can I change slice_type which is show in Elecard stream analyzer using ffmpeg ?

  10 octobre 2018, par Tooraj Jam

  I’m not ffmpeg and encodding expert and am trying to encode a MP4 file to MPEG-4 h264 .ts file.

  When Elecard stream analyzer is analyzing my result .ts file, it shows slice_type = 7 for all of i-frames as you can see in the attached screenshot.

  How can I change all these to slice_type = 2 ?

  My ffmpeg command :

  -i Source.mp4 \
  
  -filter:v 'setpts=0+PTQ-STARTPTS' -metadata:s:v:0 start_time=0 \
  
  -f adts -c:a libfdk_aac  -profile:a aac_he  -strict -2 -ar 48000 -b:a 48k \
  
  -f mpegts -c:v libx264  -vbsf h264_mp4toannexb -strict experimental -    profile:v main -level:v 3.0 -preset:v slow -movflags faststart -pat_period 100 \
  
  -x264opts nal-hrd=cbr:force-cfr=1 -crf 25 -vf scale=w=640:h=360 -aspect 16:9 \
  
  -bf 1  -sc_threshold 0 -keyint_min 2*25 -g 2*25 \
  
  -force_key_frames "expr:gte(t,n_forced*50)" -max_muxing_queue_size 1500k \
  
  -coder 1  -refs 2 \
  
  -b:v 750k -minrate 750k -maxrate 750k -bufsize 1500k \
  
  -vsync 1 -framerate 25000/1001 \
  
  -x264opts "bitrate=750:vbv-maxrate=750:vbv-bufsize=1500"\
  
  -pix_fmt yuv420p  -r 25 -x264opts force-cfr \
  
  -mbs_per_slice 1 -y dest.ts

  

• Show all four videos as thumbnails but play them one by one using FFMPEG

  18 juillet 2018, par p.jadhav

  I want to show four videos as thumbnails but play them one by one (video1 plays first then video2, etc).

  I tried this

  String[] cmd={"-loop","1","-t","36","-i","/storage/emulated/0/Download/trasprent_bg.png","-i","video1.mp4","-i","video2.mp4","-i","video3.mp4","-i","video4.mp4","-i","collage_1.png","-filter_complex","[1:v]scale=500:500,crop=266:266[tfg];[2:v]scale=500:500,crop=266:266,setpts=PTS+9/TB[bfg];[3:v]scale=500:500,crop=266:266,setpts=PTS+18/TB[threefg];[4:v]scale=500:500,crop=266:266,setpts=PTS+27/TB[fourfg];[5:v]scale=-1:-1[colage];[0:v][tfg]overlay=2:2:eof_action=pass[o1];[o1][bfg]overlay=272:2:eof_action=pass[o2];[o2][threefg]overlay=2:272:eof_action=pass[o3];[o3][fourfg]overlay=272:272:eof_action=pass:shortest=1[o4];[o4][colage]overlay=0:0","-an","videoCrop.mp4"};

  which plays the videos one by one but only shows the playing video with nothing showing for the other videos :

  Using above command play video as below.
  first video play,second video play,third video play

  I want to display all four output videos but play them one by one like below.

  screen shot

  i spent lot’s of day.Please Help me.

• fftools/ffmpeg : change fps progress log message to show two decimal digits

  28 avril 2018, par André Camargo

  fftools/ffmpeg : change fps progress log message to show two decimal digits
  Useful when transcoding videos at 29.97 fps because delivers a more accurate result for monitoring.
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] fftools/ffmpeg.c