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• Appending .ts video clip to m3u8 HLS stream

  12 janvier 2018, par JonnyHarper

  I’m trying to concat multiple streams together without the need to re-encode the videos by using an m3u8 manifest.

  The start of every video is the same, as is the end, with a short middle section which has over 7000 variations. What I’m wanting to do is create 7000+ m3u8 files, each of which merges the generic intro, the bespoke middle section and the generic end together to form one HLS stream. Is this possible ?

  Here’s the m3u8 file which is generated by ffmpeg :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-TARGETDURATION:12
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-PLAYLIST-TYPE:VOD
  
  #EXTINF:11.520000,
  
  3_1080p_000.ts
  
  #EXTINF:9.600000,
  
  3_1080p_001.ts
  
  #EXTINF:9.600000,
  
  3_1080p_002.ts
  
  #EXTINF:9.600000,
  
  3_1080p_003.ts
  
  #EXTINF:11.520000,
  
  3_1080p_004.ts
  
  #EXTINF:8.440000,
  
  3_1080p_005.ts
  
  #EXT-X-ENDLIST

  I tried adding an extra clip in at the end (also at the start) which also has duration 8.440000 seconds as per the following :

  #EXTM3U
  
  #EXT-X-VERSION:3
  
  #EXT-X-TARGETDURATION:12
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-PLAYLIST-TYPE:VOD
  
  #EXTINF:11.520000,
  
  3_1080p_000.ts
  
  #EXTINF:9.600000,
  
  3_1080p_001.ts
  
  #EXTINF:9.600000,
  
  3_1080p_002.ts
  
  #EXTINF:9.600000,
  
  3_1080p_003.ts
  
  #EXTINF:11.520000,
  
  3_1080p_004.ts
  
  #EXTINF:8.440000,
  
  3_1080p_005.ts
  
  #EXTINF:8.440000,
  
  4_1080p_005.ts
  
  #EXT-X-ENDLIST

  When I try run this, flowplayer detects the updated length and the stream plays but when it gets to playing the appended clip, it skips back to the start as though it’s stopped. Any help would be massively appreciated, otherwise I’m going to have to render each video out in full and there’s 7000+ to do !

  The problem stream is available to view here. It ends at 1min exactly instead of going to 1:08.

  Thanks in advance.

• ffplay : do not block audio thread on WIN32

  8 février 2015, par Marton Balint

  ffplay : do not block audio thread on WIN32
  The windows SDL audio driver plays the old data in the buffer in a loop if it
  
  is not updated in time. So instead of waiting for data and blocking the the
  
  audio thread, return silence if no data is available.
  Should fix ticket #2289.
  Reviewed-by : Michael Niedermayer <michael@niedermayer.cc>
  
  Signed-off-by : Marton Balint <cus@passwd.hu>
  

  • [DH] ffplay.c

• Remote Desktop's encoding is blurred when when scrolling quickly

  31 janvier 2023, par 21pages

  When scrolling the remote screen, the screen can easily become blurred.Is this because the fps is not big enough ? Or the parameters I set are wrong, framerate:30, gop_size:60, but the fps is dynamically changing, often less than 30fps when scrolling. It will gradually become clear after the scroll is over, and it will become clear immediately if a key frame is sent.

  


  I tried changing the frame rate, gop before creating the encoder, but no improvement.
The current codec is not fast enough, so the fps is not high enough. If it is a fps problem, I will find a way to increase fps.
Expect to know the reason of blur and how to fix it.

  


  My respository https://github.com/21pages/hwcodec , waiting for advice.

  


  see scroll blur gif here