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• Synchronizing RTSP signals with FFMPEG

  3 décembre 2019, par Taits

  I have achieved to merge two RTSP signals in one with FFMPEG but in the resulting stream, the first input has a delay of between 2 and 5 seconds with respect to the second. And it is always the first input that is delayed compared to the second.

  The two RTSP signals come from the same camera model, same configuration, same room ...

  However, if I put the same RTSP signal (either of the two) as input 1 and input 2, the same thing happens. Despite being the same signal, the first input is delayed compared to the second one.

  How could I get them synchronized ?

  This is the command that I execute :

  ffmpeg -rtsp_transport tcp -thread_queue_size 512 -rtbufsize 50M -r 15 
  
  -i rtsp://XXXX -rtsp_transport tcp -thread_queue_size 512 -rtbufsize 50M -r 15 
  
  -c:a aac -i rtsp://YYYY -filter_complex "[0:v]pad=iw*2:ih,setpts=PTS-STARTPTS[bg]; 
  
  [1:v]setpts=PTS-STARTPTS[fg]; [bg][fg]overlay=w[out]" -map "[out]" -f hls 
  
  -hls_time 2 -hls_list_size 5 -use_localtime 1 -use_localtime_mkdir 1 
  
  -hls_segment_filename 'LIVE/file-%s.ts' -map a -ar 16000 -ac 1 -ab 64000 -c:a aac 
  
  -y output.m3u8

  Here you have the process informationn :

  ffmpeg version 3.4.2 Copyright (c) 2000-2018 the FFmpeg developers 
  
  built with Apple LLVM version 9.0.0 (clang-900.0.39.2) 
  
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.4.2 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --disable-jack --enable-gpl --enable-libmp3lame --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma
  
    libavutil      55. 78.100 / 55. 78.100
  
    libavcodec     57.107.100 / 57.107.100
  
    libavformat    57. 83.100 / 57. 83.100
  
    libavdevice    57. 10.100 / 57. 10.100
  
    libavfilter     6.107.100 /  6.107.100
  
    libavresample   3.  7.  0 /  3.  7.  0
  
    libswscale      4.  8.100 /  4.  8.100
  
    libswresample   2.  9.100 /  2.  9.100
  
    libpostproc    54.  7.100 / 54.  7.100
  
  [rtsp @ 0x7fe284000e00] Missing PPS in sprop-parameter-sets, ignoring
  
  Input #0, rtsp, from 'rtsp://XXXX':
  
    Metadata:
  
      title           : Media Presentation
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #0:0: Video: h264 (Main), yuv420p(progressive), 1280x720, 15 fps, 15 tbr, 90k tbn, 30 tbc
  
      Stream #0:1: Audio: aac (LC), 16000 Hz, mono, fltp
  
  [rtsp @ 0x7fe28484de00] Missing PPS in sprop-parameter-sets, ignoring
  
  Input #1, rtsp, from 'rtsp://XXXX':
  
    Metadata:
  
      title           : Media Presentation
  
    Duration: N/A, start: 0.000000, bitrate: N/A
  
      Stream #1:0: Video: h264 (Main), yuv420p(progressive), 1280x720, 15 fps, 15 tbr, 90k tbn, 30 tbc
  
      Stream #1:1: Audio: aac (LC), 16000 Hz, mono, fltp
  
  Stream mapping:
  
    Stream #0:0 (h264) -> pad (graph 0)
  
    Stream #1:0 (h264) -> setpts (graph 0)
  
    overlay (graph 0) -> Stream #0:0 (libx264)
  
    Stream #0:1 -> #0:1 (aac (native) -> aac (native))
  
  Press [q] to stop, [?] for help
  
  [libx264 @ 0x7fe286802000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  [libx264 @ 0x7fe286802000] profile High, level 4.0
  
  [libx264 @ 0x7fe286802000] 264 - core 152 r2854 e9a5903 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=1 weightp=2 keyint=250 keyint_min=15 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  [hls @ 0x7fe286800000] Opening 'LIVE/file-1524728763.ts' for writing
  
  Output #0, hls, to 'output.m3u8':
  
    Metadata:
  
      title           : Media Presentation
  
      encoder         : Lavf57.83.100
  
      Stream #0:0: Video: h264 (libx264), yuv420p, 2560x720, q=-1--1, 15 fps, 90k tbn, 15 tbc (default)
  
      Metadata:
  
        encoder         : Lavc57.107.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
      Stream #0:1: Audio: aac (LC), 16000 Hz, mono, fltp, 64 kb/s
  
      Metadata:
  
        encoder         : Lavc57.107.100 aac
  
  [hls @ 0x7fe286800000] Opening 'LIVE/file-1524728782.ts' for writinged=1.09x    
  
  [hls @ 0x7fe286800000] Opening 'output.m3u8.tmp' for writing
  
  [hls @ 0x7fe286800000] Opening 'output.m3u8.tmp' for writing=N/A speed=1.07x    
  
  frame=  396 fps= 15 q=-1.0 Lsize=N/A time=00:00:27.00 bitrate=N/A speed=1.05x    
  
  video:2946kB audio:147kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown

• Copy m3u8 segment files on a single mp4 format

  26 juin 2018, par parsa

  Hi I used below command for copy m3u8 segment files to a single mp4 file :
  I run this command on c# Process class.

      -y -i "D:\OtherProjects\ConvertProj\video\2018\4\1\m3u8\200p\out.m3u8"  
  
      -y -i "D:\OtherProjects\ConvertProj\video\2018\4\1\m3u8\360p\out.m3u8"  
  
      -y -i "D:\OtherProjects\ConvertProj\video\2018\4\1\m3u8\480p\out.m3u8"  
  
      -y -i "D:\OtherProjects\ConvertProj\video\2018\4\1\m3u8\720p\out.m3u8" 
  
  -map 0 -c:v copy -c:a copy -threads 0 "D:\OtherProjects\ConvertProj\video\2018\4\1\1-200.mp4" 
  
  -map 1 -c:v copy -c:a copy -threads 0 "D:\OtherProjects\ConvertProj\video\2018\4\1\1-360.mp4" 
  
  -map 2 -c:v copy -c:a copy -threads 0 "D:\OtherProjects\ConvertProj\video\2018\4\1\1-480.mp4" 
  
  -map 3 -c:v copy -c:a copy -threads 0 "D:\OtherProjects\ConvertProj\video\2018\4\1\1.mp4" 

  I get this Error :

  [hls,applehttp @ 00000000047e3400] Failed to open segment of playlist 0
  
      Last message repeated 353 times
  
  [hls,applehttp @ 00000000047e3400] Error when loading first segment 'out0.ts'
  
  D:\OtherProjects\ConvertProj\video\2018\4\6208-3905956\m3u8\200p\out.m3u8: Invalid data found when processing input

  What is the problem ? Waht I must be do ? Is this a bug ?

• ffmpeg : How to dowmix from 2 channels 5.1 to 2 stereo streams

  26 avril 2018, par spiceemeup

  I have a mov file with a video stream and several audio streams in two different languages. Here is the output of ffprobe :

  ffprobe version N-89525-gb178278 Copyright (c) 2007-2017 the FFmpeg developers
  
   built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  
   configuration: --prefix=/home/ubuntu/ffmpeg_build --pkg-config-flags=--static 
  
  --extra-cflags=-I/home/ubuntu/ffmpeg_build/include --extra-ldflags=- 
  
  L/home/ubuntu/ffmpeg_build/lib --extra-libs='-lpthread -lm' -- 
  
  bindir=/home/ubuntu/bin --enable-gpl --enable-libass --enable-libtwolame -- 
  
  enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora -- 
  
  enable-libvorbis --enable-libx264 --enable-nonfree
  
  libavutil      56.  6.100 / 56.  6.100
  
  libavcodec     58.  8.100 / 58.  8.100
  
  libavformat    58.  3.100 / 58.  3.100
  
  libavdevice    58.  0.100 / 58.  0.100
  
  libavfilter     7.  7.100 /  7.  7.100
  
  libswscale      5.  0.101 /  5.  0.101
  
  libswresample   3.  0.101 /  3.  0.101
  
  libpostproc    55.  0.100 / 55.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'sony_trim2.mov':
  
  Metadata:
  
  major_brand     : qt
  
  minor_version   : 0
  
  compatible_brands: qt
  
  creation_time   : 2018-04-24T11:15:52.000000Z
  
  com.apple.finalcutstudio.media.uuid: BEF32C67-F7C2-4D6C-B4AD-B79255E1414B
  
  Duration: 00:01:26.32, start: 0.000000, bitrate: 197731 kb/s
  
  Stream #0:0(eng): Video: prores (apch / 0x68637061), yuv422p10le(bt709, 
  
  progressive), 1920x1080, 179299 kb/s, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 25 tbn, 25 tbc (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
    encoder         : Apple ProRes 422 (HQ)
  
    timecode        : 00:58:32:15
  
  Stream #0:1(fra): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (FL), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:2(fra): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (FR), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:3(fra): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:4(fra): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (LFE), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:5(fra): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (BL), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:6(fra): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (BR), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:7(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (FL), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:8(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (FR), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:9(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, mono, s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:10(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (LFE), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:11(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (BL), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:12(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (BR), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:13(fra): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (DL), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:14(fra): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (DR), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:15(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (DL), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:16(eng): Audio: pcm_s24le (lpcm / 0x6D63706C), 48000 Hz, 1 channels (DR), s32 (24 bit), 1152 kb/s (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
  Stream #0:17(eng): Data: none (tmcd / 0x64636D74) (default)
  
  Metadata:
  
    creation_time   : 2018-04-24T11:15:52.000000Z
  
    handler_name    : Core Media Data Handler
  
    timecode        : 00:58:32:15

  I’d like to downmix audio streams #0:1 -> #0:6 to one stereo stream and in the same time downmix audio streams #0:7 -> #0:12 to another stereo stream.
  I tried to map streams and use -ac 2 command but it didn’t work.

  ffmpeg -i myfile.mov -filter:v scale=854x480 -ac 2 -af "pan=stereo| FL < FL + 0.5*FC + 0.6*BL + 0.6*SL | FR < FR + 0.5*FC + 0.6*BR + 0.6*SR" -map 0:1 -map 0:2 -map 0:3 -map 0:4 -map 0:5 -map 0:6 -acodec libmp3lame -b:a 256k -ar 48000 -y -strict experimental -map 0:0 -x264opts bitrate=2000:vbv-maxrate=2000:vbv-bufsize=166 -vcodec libx264 -profile:v high -level:v 4.0 -pix_fmt yuv420p -aspect 16:9 -r 25 -g 50 -f mpegts -muxrate 2000K -y myfile.ts

  Any idea ?
  Thanks in advance for your help.