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• Scaling and stacking 2 videos

  31 octobre 2019, par Gambit2007

  I have 2 inputs and I want to scale, crop and put them on top of each other at the same time. My command should look something like this :

  ffmpeg -i input1 -i input2 -filter_complex crop=10000:5000:1000:0,scale=3840:1536 vstack output.mp4

  I know I need to use chaining (?) but I tried to look it up online and couldn’t really get it to work.

  So what would be the correct syntax the scale and crop both inputs and then put them vertically on top of each other while using ’-filter_complex’ only once ?

• Can non-standard sampling rates be used with AAC encoding ?

  19 novembre 2019, par Ahmed Hawary

  I am trying to up-sampling an M4a file from 41000 to another non-standard sampling rate let’s say 5000.

  ffmpeg -i audio.wav -ar 5000 audio_.wav

  This worked fine with wav files whoever it didn’t work with m4a. Any ideas why ?

  If non-standard sampling rates don’t work with AAC I need any documentation or reference for that.

• FFMPEG recording get an error when camera is turned off

  29 novembre 2019, par Bogdan Rudnytskyi

  I have a video recording service using ffmpeg.
  When the camera is turned off, I don’t get an error and the service freezes.
  Please help me how I can configure recording so that this service crashes with an error ? (and I will use Supervisor).
  Maybe I need to insert some flag ?

  ffmpeg -rtsp_transport tcp -i 'rtsp://...' -reconnect 1 -c:v copy -c:a copy -flags -global_header -hls_time 5 -hls_list_size 0 -strftime 1 -hls_segment_filename '%Y%m%d%H%M%S.ts' archive.m3u8 -nostats

  logs

  ffmpeg started on 2019-11-28 at 10:23:14 Report written to "ffmpeg-20191128-102314.log" Command line: "C:\\ffmpeg\\bin\\ffmpeg.exe" -report -rtsp_transport tcp -i "rtsp://..." -reconnect 1 -c:v copy -c:a copy -flags -global_header
  
  -hls_time 5 -hls_list_size 0 -strftime 1 -hls_segment_filename "%Y%m%d%H%M%S.ts" archive.m3u8 ffmpeg version N-94150-g231d0c819f Copyright (c) 2000-2019 the FFmpeg developers   built with gcc 9.1.1 (GCC) 20190621   configuration: --enable-gpl --enable-version3
  
  --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt   libavutil      56. 30.100 / 56. 30.100   libavcodec     58. 53.101 /
  
  58. 53.101   libavformat    58. 28.101 / 58. 28.101   libavdevice    58.  7.100 / 58.  7.100   libavfilter     7. 55.100 /  7. 55.100   libswscale      5.  4.101 /  5.  4.101   libswresample   3.  4.100 / 
  
  3.  4.100   libpostproc    55.  4.100 / 55.  4.100 Splitting the commandline. Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'. Reading option '-rtsp_transport' ... matched as AVOption 'rtsp_transport' with argument 'tcp'. Reading option '-i' ... matched as input url with argument 'rtsp://...'. Reading option '-reconnect' ... matched as AVOption 'reconnect' with argument '1'. Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'copy'. Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'copy'. Reading option '-flags' ... matched as AVOption 'flags' with argument '-global_header'. Reading option '-hls_time' ... matched as AVOption 'hls_time' with argument '5'. Reading option '-hls_list_size' ... matched as AVOption 'hls_list_size' with argument '0'. Reading option '-strftime' ... matched as AVOption 'strftime' with argument '1'. Reading option '-hls_segment_filename' ... matched as AVOption 'hls_segment_filename' with argument '%Y%m%d%H%M%S.ts'. Reading option 'archive.m3u8' ... matched as output url. Finished splitting the commandline. Parsing a group of options: global . Applying option report (generate a report) with argument 1. Successfully parsed a group of options. Parsing a group of options: input url 'rtsp://...'. Successfully parsed a group of options. Opening an input file: 'rtsp://...'. [tcp @ 0000025972ecd180] No default whitelist set [tcp @ 0000025972ecd180] Original list of addresses: [tcp @ 0000025972ecd180] Address 0.0.0.0 port 999 [tcp @ 0000025972ecd180] Interleaved list of addresses: [tcp @ 0000025972ecd180] Address 0.0.0.0 port 999 [tcp @ 0000025972ecd180] Starting connection attempt to 0.0.0.0 port 999 [tcp @ 0000025972ecd180] Successfully connected to 0.0.0.0 port 999 [rtsp @ 0000025972ecca80] SDP: v=0
  
  
  
  o=- 1574936594324879 1574936594324879 IN IP4 10.10.1.65
  
  
  
  s=Media Presentation
  
  
  
  e=NONE
  
  
  
  b=AS:5050
  
  
  
  t=0 0
  
  
  
  a=control:'rtsp://...'
  
  
  
  m=video 0 RTP/AVP 96
  
  
  
  c=IN IP4 0.0.0.0
  
  
  
  b=AS:5000
  
  
  
  a=recvonly
  
  
  
  a=x-dimensions:1920,1080
  
  
  
  a=control:'rtsp://...'
  
  
  
  a=rtpmap:96 H264/90000
  
  
  
  a=fmtp:96 profile-level-id=420029; packetization-mode=1; sprop-parameter-sets=Z00AKZpkA8ARPy4C3AQEBQAAAwPoAADDUOhgAP84AAP80rvLjQwAH+cAAH+aV3lwoA==,aO48gA==
  
  
  
  a=Media_header:MEDIAINFO=494D4B48010200000400000100000000000000000000000000000000000000000000000000000000;
  
  
  
  a=appversion:1.0
  
  
  
  
  
  [rtsp @ 0000025972ecca80] video codec set to: h264 [rtsp @ 0000025972ecca80] RTP Profile IDC: 42 Profile IOP: 0 Level: 29 [rtsp @ 0000025972ecca80] RTP Packetization Mode: 1 [rtsp @ 0000025972ecca80] Extradata set to 0000025972ed0600 (size: 61) [rtsp @ 0000025972ecca80] setting jitter buffer size to 0 [rtsp @ 0000025972ecca80] hello state=0 [h264 @ 0000025972ed0080] nal_unit_type: 7(SPS), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 8(PPS), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 7(SPS), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 8(PPS), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 7(SPS), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 8(PPS), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 5(IDR), nal_ref_idc: 3 [h264 @ 0000025972ed0080] Format yuvj420p chosen by get_format(). [h264 @ 0000025972ed0080] Reinit context to 1920x1088, pix_fmt: yuvj420p [h264 @ 0000025972ed0080] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 7(SPS), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 8(PPS), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 5(IDR), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 7(SPS), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 8(PPS), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 5(IDR), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3 [h264 @ 0000025972ed0080] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3 [rtsp @ 0000025972ecca80] All info found Input #0, rtsp, from 'rtsp://...':   Metadata:
  
      title           : Media Presentation   Duration: N/A, start: 0.240000, bitrate: N/A
  
      Stream #0:0, 28, 1/90000: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc Successfully opened the file. Parsing a group of options: output url archive.m3u8. Applying option c:v (codec name) with argument copy. Applying option c:a (codec name) with argument copy. Successfully parsed a group of options. Opening an output file: archive.m3u8. Successfully opened the file. [hls @ 0000025972f977c0] Opening '20191128102316.ts' for writing [file @ 0000025975633ec0] Setting default whitelist 'file,crypto' [mpegts @ 00000259756333c0] muxrate VBR, pcr every 2 pkts, sdt every 2147483647, pat/pmt every 2147483647 pkts Output #0, hls, to 'archive.m3u8':   Metadata:
  
      title           : Media Presentation
  
      encoder         : Lavf58.28.101
  
      Stream #0:0, 0, 1/90000: Video: h264 (Main), yuvj420p(pc, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 25 tbr, 90k tbn, 25 tbc Stream mapping:   Stream #0:0 -> #0:0 (copy) Press [q] to stop, [?] for help cur_dts is invalid st:0 (0) [init:1 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream) [hls @ 0000025972f977c0] Non-monotonous DTS in output stream 0:0; previous: 0, current: -18000; changing to 1. This may result in incorrect timestamps in the output file. [hls @ 0000025972f977c0] Non-monotonous DTS in output stream 0:0; previous: 1, current: -14400; changing to 2. This may result in incorrect timestamps in the output file. [hls @ 0000025972f977c0] Non-monotonous DTS in output stream 0:0; previous: 2, current: -10800; changing to 3. This may result in incorrect timestamps in the output file. [hls @ 0000025972f977c0] Non-monotonous DTS in output stream 0:0; previous: 3, current: -7200; changing to 4. This may result in incorrect timestamps in the output file. [hls @ 0000025972f977c0] Non-monotonous DTS in output stream 0:0; previous: 4, current: -3600; changing to 5. This may result in incorrect timestamps in the output file. [hls @ 0000025972f977c0] Non-monotonous DTS in output stream 0:0; previous: 5, current: 0; changing to 6. This may result in incorrect timestamps in the output file. frame=   48 fps=0.0 q=-1.0 size=N/A time=00:00:01.68 bitrate=N/A speed=3.13x     frame=   61 fps= 58 q=-1.0 size=N/A time=00:00:02.20 bitrate=N/A speed= 2.1x     frame=   74 fps= 47 q=-1.0 size=N/A time=00:00:02.72 bitrate=N/A speed=1.74x     frame=   87 fps= 41 q=-1.0 size=N/A time=00:00:03.24 bitrate=N/A speed=1.54x     frame=  100 fps= 38 q=-1.0 size=N/A time=00:00:03.76 bitrate=N/A speed=1.44x   frame=  113 fps= 36 q=-1.0 size=N/A time=00:00:04.27 bitrate=N/A speed=1.37x     frame=  125 fps= 34 q=-1.0 size=N/A time=00:00:04.75 bitrate=N/A speed=1.31x     frame=  138 fps= 33 q=-1.0 size=N/A time=00:00:05.27 bitrate=N/A speed=1.28x     frame=  151 fps= 32 q=-1.0 size=N/A time=00:00:05.79 bitrate=N/A speed=1.24x     [AVIOContext @ 0000025972ecbe80] Statistics: 0 seeks, 15 writeouts [hls @ 0000025972f977c0] Opening '20191128102321.ts' for writing [file @ 0000025972f9ef00] Setting default whitelist 'file,crypto' [hls @ 0000025972f977c0] Opening 'archive.m3u8.tmp' for writing [file @ 000002597562ff40] Setting default whitelist 'file,crypto' EXT-X-MEDIA-SEQUENCE:0 [AVIOContext @ 0000025972ecbfc0] Statistics: 0 seeks, 1 writeouts frame=  165 fps= 32 q=-1.0 size=N/A time=00:00:06.35 bitrate=N/A speed=1.22x     frame=  178 fps= 31 q=-1.0 size=N/A time=00:00:06.87 bitrate=N/A speed= 1.2x     frame=  192 fps= 31 q=-1.0 size=N/A time=00:00:07.43 bitrate=N/A speed=1.18x   frame=  204 fps= 30 q=-1.0 size=N/A time=00:00:07.91 bitrate=N/A speed=1.17x     frame=  218 fps= 30 q=-1.0 size=N/A time=00:00:08.47 bitrate=N/A speed=1.16x     frame=  231 fps= 29 q=-1.0 size=N/A time=00:00:08.99 bitrate=N/A speed=1.15x     frame=  244 fps= 29 q=-1.0 size=N/A time=00:00:09.51 bitrate=N/A speed=1.14x     frame=  255 fps= 29 q=-1.0 size=N/A time=00:00:09.95 bitrate=N/A speed=1.11x   frame=  272 fps= 29 q=-1.0 size=N/A time=00:00:10.63 bitrate=N/A speed=1.12x     frame=  285 fps= 28 q=-1.0 size=N/A time=00:00:11.15 bitrate=N/A speed=1.11x     frame=  299 fps= 28 q=-1.0 size=N/A time=00:00:11.71 bitrate=N/A speed=1.11x     [AVIOContext @ 0000025972ecbe80] Statistics: 0 seeks, 12 writeouts [hls @ 0000025972f977c0] Opening '20191128102327.ts' for writing [file @ 0000025975633ec0] Setting default whitelist 'file,crypto' [hls @ 0000025972f977c0] Opening 'archive.m3u8.tmp' for writing [file @ 0000025975630780] Setting default whitelist 'file,crypto' EXT-X-MEDIA-SEQUENCE:0 [AVIOContext @ 0000025972ecbfc0] Statistics: 0 seeks, 1 writeouts frame=  305 fps= 28 q=-1.0 size=N/A time=00:00:11.95 bitrate=N/A speed=1.08x     frame=  325 fps= 28 q=-1.0 size=N/A time=00:00:12.75 bitrate=N/A speed= 1.1x     frame=  338 fps= 28 q=-1.0 size=N/A time=00:00:13.27 bitrate=N/A speed=1.09x   frame=  351 fps= 28 q=-1.0 size=N/A time=00:00:13.79 bitrate=N/A speed=1.09x     frame=  364 fps= 28 q=-1.0 size=N/A time=00:00:14.31 bitrate=N/A speed=1.09x     frame=  377 fps= 28 q=-1.0 size=N/A time=00:00:14.83 bitrate=N/A speed=1.08x     frame=  390 fps= 27 q=-1.0 size=N/A time=00:00:15.35 bitrate=N/A speed=1.08x     frame=  403 fps= 27 q=-1.0 size=N/A time=00:00:15.87 bitrate=N/A speed=1.08x   [AVIOContext @ 0000025972ecbe80] Statistics: 0 seeks, 8 writeouts [hls @ 0000025972f977c0] Opening '20191128102331.ts' for writing [file @ 0000025975633ec0] Setting default whitelist 'file,crypto' [hls @ 0000025972f977c0] Opening 'archive.m3u8.tmp' for writing [file @ 0000025975630240] Setting default whitelist 'file,crypto' EXT-X-MEDIA-SEQUENCE:0 [AVIOContext @ 0000025972ecbfc0] Statistics: 0 seeks, 1 writeouts frame=  416 fps= 27 q=-1.0 size=N/A time=00:00:16.39 bitrate=N/A speed=1.08x     frame=  428 fps= 27 q=-1.0 size=N/A time=00:00:16.87 bitrate=N/A speed=1.07x     frame=  442 fps= 27 q=-1.0 size=N/A time=00:00:17.43 bitrate=N/A speed=1.07x   frame=  454 fps= 27 q=-1.0 size=N/A time=00:00:17.91 bitrate=N/A speed=1.07x