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• ffmpeg mp4 to hls vod with extract segment duration without re-encoding

  11 juillet 2021, par Jeremy

  Hello I have h264 mp4 files. What I want to do is convert it to hls without re-encoding. This can be achieve by :

  


  ffmpeg -i input.mp4 -c copy -force_key_frames "expr:gte(t,n_forced*4)" -hls_time 4 -hls_playlist_type vod -hls_segment_type mpegts vid.m3u8


  


  But this problem with this is that it doesn't create extract segment duration :

  


  $ for f in *.ts; do echo -n "$f,"; ffprobe -v error -show_entries format=duration -sexagesimal -of csv=p=0 "$f"; done
vid0.ts,0:00:04.837700
vid1.ts,0:00:05.587200
vid2.ts,0:00:06.006200
vid3.ts,0:00:01.368200
vid4.ts,0:00:02.693867


  


  I don't believe I can't insert keyframes without encoding.

  


  When I run :

  


  ffmpeg -i input.mp4 -codec:v libx264 -force_key_frames "expr:gte(t,n_forced*4)" -hls_time 4 -hls_playlist_type vod -hls_segment_type mpegts vid.m3u8


  


  its works but this is resource intensive as it re-encode the video.

  


  So I am looking for the best way to achieve this while using minimal resource as possible.

  


• avutil/mem : Correct documentation of av_fast_*alloc(z)

  18 novembre 2018, par Andreas Rheinhardt

  avutil/mem : Correct documentation of av_fast_*alloc(z)
  The current wording regarding size and min_size is completely wrong and
  
  ignores that min_size is indeed only a desired minimal size, not the
  
  actually allocated size.
  Signed-off-by : Andreas Rheinhardt <andreas.rheinhardt@googlemail.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavutil/mem.h

• Build FFMpeg for converting m3u8 to mp4 only

  8 août 2020, par Hare Shinohara

  I want to build a minimal version of FFMpeg for converting m3u8 to mp4 only, and the m3u8 file will be input via a https link.

  


  I tried

  


  ./configure \
--disable-everything \
--disable-ffplay --disable-ffprobe \
--disable-asm --disable-doc --disable-devices \
--disable-pthreads --disable-w32threads --disable-hwaccels \
--disable-parsers --disable-bsfs --disable-debug \
--disable-indevs --disable-outdevs \
--enable-gpl --enable-nonfree \
--enable-openssl \
--enable-libx264 \
--enable-protocol=file,https,crypto,hls \
--enable-decoder=aac,h264 \
--enable-encoder=aac,libx264 \
--enable-demuxer=aac,h264,hls \
--enable-muxer=h264,mp4


  


  but got errors

  


  Error when loading first segment


  


  Invalid data found when processing input


  


  Does anyone know how to configure correctly in this case ?
Please help.