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• Why m3u8 file does not play well when i manual change m3u8 file

  27 mai 2022, par nancy

  I use ffmpeg to change mp4 to .ts

  


  ffmpeg -y -i [fileName].mp4 -vcodec copy  -vbsf h264_mp4toannexb [outPutFileName].ts


  


  And get the following index.m3u8 file

  


  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-ALLOW-CACHE:YES
#EXT-X-TARGETDURATION:22
#EXTINF:21.804344,
out-0000.ts
#EXTINF:10.847822,
out-0001.ts
#EXTINF:12.239122,
out-0002.ts
#EXT-X-ENDLIST


  


  And then i use hls.js play this file

  


  It works fine

  


  But now i want to change this index.m3u8 file to this (copy this out02.ts twice, to repeat out02.ts)

  


  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-MEDIA-SEQUENCE:0
#EXT-X-ALLOW-CACHE:YES
#EXT-X-TARGETDURATION:22
#EXTINF:21.804344,
out-0000.ts
#EXTINF:10.847822,
out-0001.ts
#EXTINF:12.239122,
out-0002.ts
#EXTINF:12.239122,
out-0002.ts
#EXTINF:12.239122,
out-0002.ts
#EXT-X-ENDLIST


  


  The result is this video play time change as expected

  


  but out02 does not repeat, when it play to end of first out02.ts, screen stuck at the begin of out00

  


  Why it does not work fine when i edit this file by myself ?
or i shoule use ffmpeg update this index.m3u8 file ?

  


• unable to steam rtsp from mp4(h264) file using ffmpeg on os x : Connection refused Could not write header for output file

  28 janvier 2023, par TalG

  im ussing the following command on my macbook os high sierra to stream rtsp from mp4 file using ffmpeg :

  


  sudo ffmpeg -re -i ./Big_Buck_Bunny_1080_10s_1MB.mp4 -c:v libx264 -preset superfast -tune zerolatency -c:a aac -ar 44100 -f rtsp -rtsp_transport udp rtsp://127.0.0.1:8888/live


  


  but get the following error :

  


  [tcp @ 0x7fb979e22ec0] Connection to tcp://127.0.0.1:1935?timeout=0 failed: Connection refused
Could not write header for output file #0 (incorrect codec parameters ?): Connection refused
Error initializing output stream 0:0 -- 
Conversion failed!


  


  here is the whole output of the command :

  


  ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from './Big_Buck_Bunny_1080_10s_1MB.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    title           : Big Buck Bunny, Sunflower version
    artist          : Blender Foundation 2008, Janus Bager Kristensen 2013
    composer        : Sacha Goedegebure
    encoder         : Lavf57.63.100
    comment         : Creative Commons Attribution 3.0 - http://bbb3d.renderfarming.net
    genre           : Animation
  Duration: 00:00:10.00, start: 0.000000, bitrate: 815 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 812 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x7fb97a00de00] using SAR=1/1
[libx264 @ 0x7fb97a00de00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fb97a00de00] profile High, level 4.0, 4:2:0, 8-bit
[libx264 @ 0x7fb97a00de00] 264 - core 160 r3011 cde9a93 - H.264/MPEG-4 AVC codec - Copyleft 2003-2020 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x3 me=dia subme=1 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=12 lookahead_threads=12 sliced_threads=1 slices=12 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=1 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[tcp @ 0x7fb979e22ec0] Connection to tcp://127.0.0.1:1935?timeout=0 failed: Connection refused
Could not write header for output file #0 (incorrect codec parameters ?): Connection refused
Error initializing output stream 0:0 -- 
Conversion failed!


  


  tried with and without sudo, tried changing rtsp ://... to http://
also tried udp but get same output..

  


  chacked that the port is not in use(8888) and different ports (1935...) but still the same.

  


  i installed ffmpeg via brew install...

  


  when i run some test server on my localhost i never have issues ussing an unused port

  


  really stuck here and any help would be amazing...thank you

  


  EDIT :
Problem was in the command i used : "rtsp ://127.0.0.1:8888/live" - but i did not have a running server capable of accepting the data from ffmpeg and redestributing it - so i had to first run such server and only after that to run ffmpeg :

  


  Servers which can receive from FFmpeg (to restream to multiple clients) include ffserver (linux only, though with cygwin it might work on windows), or ​Wowza Media Server, or ​Flash Media Server, Red5, or ​various others. Even ​VLC can pick up the stream from ffmpeg, then redistribute it, acting as a server.

  


  i used the VLC option. You can read about it here : http://trac.ffmpeg.org/wiki/StreamingGuide

  


• [ffmpeg C++ API] : How to copy a music file's cover image into another music file ?

  22 avril 2022, par Ananta

  I am having difficulties in copying a source music file's cover image into a destination music file. These two music files are in different formats (i.e, either mp3, flac, wav, or wma, different sampling rate). How should I implement the code for this ? I created a minimal code for this task below :

  


  const char* src_path = "source.mp3";
const char* dest_path = "destination.flac";
AVPacket src_pic; 

// open the source path
AVFormatContext *src_ctx = avformat_alloc_context();
avformat_open_input(&src_ctx, src_path, NULL, NULL);

// find the first attached picture, if available
for (i = 0; i < src_ctx->nb_streams; i++)
   if (src_ctx->streams[i]->disposition & AV_DISPOSITION_ATTACHED_PIC) {
      src_pic = src_ctx->streams[i]->attached_pic;

// open the destination path
AVFormatContext *dest_ctx = avformat_alloc_context();
avformat_open_input(&dest_ctx, dest_path, NULL, NULL);

// Then, how to embed the 'src_pic' into 'dest_ctx'?