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• convert avi to mp4 - centos - propper command

  16 novembre 2012, par Rares Daniel

  i need some help, please. Im strugling for a time now, with ffmpeg/mencoder/mp4box.

  i need to convert videos from avi to mp4, to maintain same quality, and IF possible, to reduce size.

  Im using centos 6.3 64bit

  i tried several commands :
  ffmpeg -i input.avi -acodec libfaac -b:a 128k -vcodec mpeg4 -b:v 1200k -flags +aic+mv4 output.mp4
  with : qscale 1

  the commands work, but the output file cant be played via httpd, i get (media time unsuported) or the output file is too large.
  I need an command to convert from avi to mp4 using h264 and faac.

  With windows , i have this "HandBrakeCLI.exe" -i "input" -t 1 -c 1 -o "output" -f mp4 —strict-anamorphic -e x264 -q 20 —vfr -a 1 -E faac -B 160 -6 dpl2 -R Auto -D 0 —gain=0 —audio-copy-mask none —audio-fallback ffac3 -x ref=1:weightp=1:subq=2:rc-lookahead=10:trellis=0:8x8dct=0 —verbose=1 And works like a charm. But not on linux

  Can you please give me a command to do this ? Also, if its possbile to use 2-3 core of server and 2-3 gb ram so the process would be faster.

  Thank you

• ffmpeg : add ui64 type to SpecifierOpt

  18 novembre 2017, par pkviet

  ffmpeg : add ui64 type to SpecifierOpt
   Adds ui64 (uint64_t) as a possible type for SpecifierOpt. This enables
  
   use of uint64_t options with SpecifierOpt such as channel_layout
  
   when expressed as a 64 bit channel mask.
  Signed-off-by : pkviet <pkv.stream@gmail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] fftools/cmdutils.h

• Converting MP4 to HLS via ffmpeg producing stream with start delay

  24 mai 2018, par Eugene Alexeev

  I’m trying to convert mp4 to hls via this FFMpeg command :

  ffmpeg -i 1.mp4 -vcodec copy -q:v 5 -hls_time 5 -hls_list_size 0 -f hls 1.m3u8

  Command is working fine, without any errors whatsoever. BUT, when I’m trying to play brand-new HLS stream locally I noticed that it has a fixed start delay. I checked metadata of stream with ffprobe 1.m3u8 And that’s what I got :

  Input #0, hls,applehttp, from '1.m3u8':
 Duration: 00:00:11.17, start: 1.400000, bitrate: 0 kb/s
 Program 0
   Metadata:
     variant_bitrate : 0
   Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, smpte170m/bt709/bt709), 720x1280, 30 fps, 30 tbr, 90k tbn, 180k tbc
   Metadata:
     variant_bitrate : 0

  As you can see, parameter start has value of 1.400000 and I believe that’s the reason of this annoying start delay. My question is - how can I get rid of that ?

  I tried to set start time with -ss flag but it doesn’t affect an output at all. Also input is perfectly fine, I tried to convert it with the same command but to .mp4 and I got correct results. Am I missing something here ? I would be very appreciated for any help. Thanks.