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• avcodec/idctdsp : Transmit studio_profile to init instead of using AVCodecContext...

  28 mai 2018, par Michael Niedermayer

  avcodec/idctdsp : Transmit studio_profile to init instead of using AVCodecContext profile
  These 2 fields are not always the same, it is simpler to always use the same field
  
  for detecting studio profile
  Fixes : null pointer dereference
  
  Fixes : ffmpeg_crash_3.avi
  Found-by : Thuan Pham <thuanpv@comp.nus.edu.sg>, Marcel Böhme, Andrew Santosa and Alexandru RazvanCaciulescu with AFLSmart
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavcodec/idctdsp.c
  • [DH] libavcodec/idctdsp.h
  • [DH] libavcodec/mpegvideo.c

• ffmpeg hls master playlist generation

  15 avril 2019, par diS

  With the recent ffmpeg master branch(commit 7fcbeb) we can generate the master playlist using

  -master_pl_name

  option. But I am unable to generate the master playlist with different profiles. Tried using

  -var_stream_map

  how can we use these options for creating master playlist with different profiles ?

  I am trying with below ffmpeg command :

  # ./ffmpeg  -y -loglevel error -err_detect careful -analyzeduration 8000000 -probesize 4000000 -rtbufsize 300000 -flush_packets 0 -fflags +genpts+discardcorrupt -f mpegts -i test.ts -c copy -var_stream_map "v:0,agroup:aud_high a:0,agroup:aud_high" -ignore_unknown -flags global_header -f hls -master_pl_name master.m3u8 -master_pl_publish_rate 32 -hls_time 4 -hls_list_size 40 -hls_flags delete_segments /webserver/video0_%v.m3u8

• How do I make youtube-dl or streamlink stop after a certain period of time when downloading a live stream

  13 janvier 2020, par Programmer4Life

  I’m the unofficial historian for a popular 24/7 live feed. I wrote a script to use streamlink (fork of livestreamer) to download the stream constantly. Then i have a script to upload the captured video to YouTube as unlisted for the stream owner. I use a shell script and have the file names be dates and times.

  I’ve also used youtube-dl. For both, The maximum captured time appears to be 6 hours because it’ll stop after that amount of time. To address this, I wrote a script to restart the capture when it stops after sleeping for 30 seconds (safety in case of runaway loop) so this isn’t an issue either.

  What i am trying to do is to either set my stream capture (whether it’s youtube-dl or streamlink it doesn’t matter) to stop after a shorter interval, say 2 hours. I could also split up the file into 3 parts but i don’t know if that would require re-encoding. If it does, that’s not an option because all of this is done on a VPS with limited resources.

  The reason I am trying to split up the files or capture in a shorter time period is because 6 hours is too dang long to easily navigate a YouTube video. On mobile, trying to seek to a specific time is near impossible. Desktop isn’t much easier because you need to be very precise.