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  • Stream is not appearing on youtube

    1er novembre 2022, par AMRITESH GUPTA

    I am trying to stream a captured stream to youtube live through FFmpeg, but the stream is not appearing on youtube. I tried giving input from an mp4 file, and it worked perfectly but providing input as a buffer through stdin gives nothing.

    


    FFmpeg command

    


    ffmpeg -rtbufsize 100M -report -i - -v error -c:v libx264 -preset veryfast -tune zerolatency -g:v 60 -c:a aac -strict -2 -ar 44100 -b:a 64k -y -use_wallclock_as_timestamps 1 -async 1 -f flv ${youtubeURL}

    


    I used -report for generating a log report, and I couldn't find anything wrong with it.

    


    Here is snippet of log file

    


    ffmpeg started on 2022-11-01 at 09:42:32
Report written to "ffmpeg-20221101-094232.log"
Log level: 48
Command line:
ffmpeg -rtbufsize 100M -report -i - -v error -c:v libx264 -preset veryfast -tune zerolatency -g:v 60 -c:a aac -strict -2 -ar 44100 -b:a 64k -y -use_wallclock_as_timestamps 1 -async 1 -f flv rtmp://a.rtmp.youtube.com/live2/pxjt-j9g5-ygv8-0000-6w8h
ffmpeg version 2022-10-27-git-00b03331a0-full_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers
  built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc --enable-vulkan --ena  libavutil      57. 39.101 / 57. 39.101
  libavcodec     59. 51.100 / 59. 51.100
  libavformat    59. 34.101 / 59. 34.101
  libavdevice    59.  8.101 / 59.  8.101
  libavfilter     8. 49.101 /  8. 49.101
  libswscale      6.  8.112 /  6.  8.112
  libswresample   4.  9.100 /  4.  9.100
  libpostproc    56.  7.100 / 56.  7.100
Splitting the commandline.
Reading option '-rtbufsize' ... matched as AVOption 'rtbufsize' with argument '100M'.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Reading option '-i' ... matched as input url with argument '-'.
Reading option '-v' ... matched as option 'v' (set logging level) with argument 'error'.
Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'libx264'.
Reading option '-preset' ... matched as AVOption 'preset' with argument 'veryfast'.
Reading option '-tune' ... matched as AVOption 'tune' with argument 'zerolatency'.
Reading option '-g:v' ... matched as AVOption 'g:v' with argument '60'.
Reading option '-c:a' ... matched as option 'c' (codec name) with argument 'aac'.
Reading option '-strict' ...Routing option strict to both codec and muxer layer
 matched as AVOption 'strict' with argument '-2'.
Reading option '-ar' ... matched as option 'ar' (set audio sampling rate (in Hz)) with argument '44100'.
Reading option '-b:a' ... matched as option 'b' (video bitrate (please use -b:v)) with argument '64k'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-use_wallclock_as_timestamps' ... matched as AVOption 'use_wallclock_as_timestamps' with argument '1'.
Reading option '-async' ... matched as AVOption 'async' with argument '1'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'flv'.
Reading option 'rtmp://a.rtmp.youtube.com/live2/pxjt-j9g5-ygv8-0000-6w8h' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Applying option v (set logging level) with argument error.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url -.
Successfully parsed a group of options.
Opening an input file: -.
[NULL @ 0000025c01844940] Opening 'pipe:' for reading
[pipe @ 0000025c01844e00] Setting default whitelist 'crypto,data'
[matroska,webm @ 0000025c01844940] Format matroska,webm probed with size=2048 and score=100
st:0 removing common factor 1000000 from timebase
[matroska,webm @ 0000025c01844940] Before avformat_find_stream_info() pos: 136 bytes read:32271 seeks:0 nb_streams:1
[extract_extradata @ 0000025c01817d40] nal_unit_type: 7(SPS), nal_ref_idc: 3
[extract_extradata @ 0000025c01817d40] nal_unit_type: 8(PPS), nal_ref_idc: 3
[extract_extradata @ 0000025c01817d40] nal_unit_type: 5(IDR), nal_ref_idc: 3
[extract_extradata @ 0000025c01817d40] nal_unit_type: 5(IDR), nal_ref_idc: 3
[extract_extradata @ 0000025c01817d40] nal_unit_type: 5(IDR), nal_ref_idc: 3
[extract_extradata @ 0000025c01817d40] nal_unit_type: 5(IDR), nal_ref_idc: 3
[extract_extradata @ 0000025c01817d40] nal_unit_type: 5(IDR), nal_ref_idc: 3
[extract_extradata @ 0000025c01817d40] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 8(PPS), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] Format yuv420p chosen by get_format().
[h264 @ 0000025c0186aac0] Reinit context to 1280x384, pix_fmt: yuv420p
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[h264 @ 0000025c0186aac0] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 3
[matroska,webm @ 0000025c01844940] max_analyze_duration 5000000 reached at 22181000 microseconds st:0
[matroska,webm @ 0000025c01844940] rfps: 1.000000 0.006758
[matroska,webm @ 0000025c01844940] rfps: 2.000000 0.019257
[matroska,webm @ 0000025c01844940] rfps: 7.916667 0.017773
[matroska,webm @ 0000025c01844940] rfps: 9.916667 0.012828
[matroska,webm @ 0000025c01844940] rfps: 10.916667 0.019976
[matroska,webm @ 0000025c01844940] rfps: 16.833333 0.010482
[matroska,webm @ 0000025c01844940] rfps: 17.833333 0.007736
[matroska,webm @ 0000025c01844940] rfps: 17.833333 0.007736
[matroska,webm @ 0000025c01844940] rfps: 18.833333 0.018506
[matroska,webm @ 0000025c01844940] After avformat_find_stream_info() pos: 88442 bytes read:88443 seeks:0 frames:31
Input #0, matroska,webm, from 'pipe:':
  Metadata:
    encoder         : Chrome
  Duration: N/A, start: 0.000000, bitrate: N/A
  Stream #0:0(eng), 31, 1/1000: Video: h264 (Constrained Baseline), yuv420p(progressive), 1280x382, SAR 1:1 DAR 640:191, 1 tbr, 1k tbn (default)
Successfully opened the file.
Parsing a group of options: output url rtmp://a.rtmp.youtube.com/live2/pxjt-j9g5-ygv8-0000-6w8h.
Applying option c:v (codec name) with argument libx264.
Applying option c:a (codec name) with argument aac.
Applying option ar (set audio sampling rate (in Hz)) with argument 44100.
Applying option b:a (video bitrate (please use -b:v)) with argument 64k.
Applying option f (force format) with argument flv.
Successfully parsed a group of options.
Opening an output file: rtmp://a.rtmp.youtube.com/live2/pxjt-j9g5-ygv8-0000-6w8h.
Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (rtmp://a.rtmp.youtube.com/live2/pxjt-j9g5-ygv8-0000-6w8h) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
[rtmp @ 0000025c01d1bd00] No default whitelist set
[tcp @ 0000025c01844f40] No default whitelist set
[tcp @ 0000025c01844f40] Original list of addresses:
[tcp @ 0000025c01844f40] Address 142.250.193.204 port 1935
[tcp @ 0000025c01844f40] Address 142.250.193.236 port 1935
[tcp @ 0000025c01844f40] Address 142.250.206.108 port 1935
[tcp @ 0000025c01844f40] Address 142.250.206.140 port 1935
[tcp @ 0000025c01844f40] Address 142.250.206.172 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.12 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.44 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.76 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.108 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.140 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.172 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.204 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.236 port 1935
[tcp @ 0000025c01844f40] Address 142.250.195.12 port 1935
[tcp @ 0000025c01844f40] Address 142.250.207.204 port 1935
[tcp @ 0000025c01844f40] Address 142.250.207.236 port 1935
[tcp @ 0000025c01844f40] Interleaved list of addresses:
[tcp @ 0000025c01844f40] Address 142.250.193.204 port 1935
[tcp @ 0000025c01844f40] Address 142.250.193.236 port 1935
[tcp @ 0000025c01844f40] Address 142.250.206.108 port 1935
[tcp @ 0000025c01844f40] Address 142.250.206.140 port 1935
[tcp @ 0000025c01844f40] Address 142.250.206.172 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.12 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.44 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.76 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.108 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.140 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.172 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.204 port 1935
[tcp @ 0000025c01844f40] Address 142.250.194.236 port 1935
[tcp @ 0000025c01844f40] Address 142.250.195.12 port 1935
[tcp @ 0000025c01844f40] Address 142.250.207.204 port 1935
[tcp @ 0000025c01844f40] Address 142.250.207.236 port 1935
[tcp @ 0000025c01844f40] Starting connection attempt to 142.250.193.204 port 1935
[tcp @ 0000025c01844f40] Successfully connected to 142.250.193.204 port 1935
[rtmp @ 0000025c01d1bd00] Handshaking...
[rtmp @ 0000025c01d1bd00] Type answer 3
[rtmp @ 0000025c01d1bd00] Server version 4.0.0.1
[rtmp @ 0000025c01d1bd00] Proto = rtmp, path = /live2/pxjt-j9g5-ygv8-0000-6w8h, app = live2, fname = pxjt-j9g5-ygv8-0000-6w8h
[rtmp @ 0000025c01d1bd00] Window acknowledgement size = 2500000
[rtmp @ 0000025c01d1bd00] Max sent, unacked = 59768832
[rtmp @ 0000025c01d1bd00] Releasing stream...
[rtmp @ 0000025c01d1bd00] FCPublish stream...
[rtmp @ 0000025c01d1bd00] Creating stream...
[rtmp @ 0000025c01d1bd00] Sending publish command for 'pxjt-j9g5-ygv8-0000-6w8h'
Successfully opened the file.
detected 8 logical cores
[h264 @ 0000025c01882e00] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0000025c01882e00] nal_unit_type: 8(PPS), nal_ref_idc: 3
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
[matroska,webm @ 0000025c01844940] Thread message queue blocking; consider raising the thread_queue_size option (current value: 1)
[h264 @ 0000025c01882e00] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0000025c01882e00] nal_unit_type: 8(PPS), nal_ref_idc: 3
[h264 @ 0000025


    


  • "wrong sample count" When reading MP4 files using OpenCV

    26 octobre 2022, par Object Unknown

    I want to marge some mp4 videos using OpenCV library, but when I try to read those videos using cv::VideoCapture, it outputs like that :

    


    [mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9AAE9D80] co located POCs unavailable
[h264 @ 000001EB9AAE7D80] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9A128600] co located POCs unavailable
[h264 @ 000001EB9A129840] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB9AA28E40] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9A169B00] co located POCs unavailable
[h264 @ 000001EB9A16B680] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB960CD680] co located POCs unavailable
[h264 @ 000001EB960CC8C0] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9A81DDC0] co located POCs unavailable
[h264 @ 000001EB9A81B000] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB960CB200] co located POCs unavailable
[h264 @ 000001EB960CBFC0] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB99F206C0] co located POCs unavailable
[h264 @ 000001EB99F20B40] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9A81D480] co located POCs unavailable
[h264 @ 000001EB9A81B000] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9AD02C00] co located POCs unavailable
[h264 @ 000001EB9AD02300] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9A81B480] co located POCs unavailable
[h264 @ 000001EB9A81B940] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[h264 @ 000001EB9AD02780] co located POCs unavailable
[h264 @ 000001EB9AD01E40] co located POCs unavailable
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count
[mov,mp4,m4a,3gp,3g2,mj2 @ 000001EB96084B80] wrong sample count


    


    and just exited with exit value 0. I want to know why it is reporting this and how to solve it please.

    


    Heres my demo code :

    


    #include <string>&#xA;#include <iostream>&#xA;#include <opencv2></opencv2>core/core.hpp>&#xA;#include <opencv2></opencv2>video/video.hpp>&#xA;#include <opencv2></opencv2>imgproc/imgproc.hpp>&#xA;#include <opencv2></opencv2>videoio/videoio.hpp>&#xA;#include <opencv2></opencv2>highgui/highgui.hpp>&#xA;&#xA;int main()&#xA;{&#xA;        cv::Mat frame;&#xA;        cv::VideoCapture vcap;&#xA;        for (int i = 1; i &lt;= 60; i&#x2B;&#x2B;)&#xA;        {&#xA;            if (!vcap.open("G:\\Users\\15819\\Desktop\\Demo\\demo (" &#x2B; std::to_string(i) &#x2B; ").mp4"))&#xA;            {&#xA;                std::cout &lt;&lt; "Failed to Open File: demo (" &lt;&lt; i &lt;&lt; ").mp4" &lt;&lt; std::endl;&#xA;                continue;&#xA;            }&#xA;            while (!vcap.read(frame))&#xA;                cv::imshow("video", frame);&#xA;        }&#xA;        return 0;&#xA;}&#xA;</iostream></string>

    &#xA;

    I installed the OpenCV and FFmpeg library using vcpkg, here's the library information (displayed by vcpkg list command) :

    &#xA;

    ffmpeg:x64-windows                                4.4.1#21            a library to decode, encode, transcode, mux, dem...&#xA;ffmpeg:x86-windows                                4.4.1#21            a library to decode, encode, transcode, mux, dem...&#xA;ffmpeg[avcodec]:x64-windows                                           Build the avcodec library&#xA;ffmpeg[avcodec]:x86-windows                                           Build the avcodec library&#xA;ffmpeg[avdevice]:x64-windows                                          Build the avdevice library&#xA;ffmpeg[avdevice]:x86-windows                                          Build the avdevice library&#xA;ffmpeg[avfilter]:x64-windows                                          Build the avfilter library&#xA;ffmpeg[avfilter]:x86-windows                                          Build the avfilter library&#xA;ffmpeg[avformat]:x64-windows                                          Build the avformat library&#xA;ffmpeg[avformat]:x86-windows                                          Build the avformat library&#xA;ffmpeg[openh264]:x64-windows                                          H.264 de/encoding via openh264&#xA;ffmpeg[openh264]:x86-windows                                          H.264 de/encoding via openh264&#xA;ffmpeg[swresample]:x64-windows                                        Build the swresample library&#xA;ffmpeg[swresample]:x86-windows                                        Build the swresample library&#xA;ffmpeg[swscale]:x64-windows                                           Build the swscale library&#xA;ffmpeg[swscale]:x86-windows                                           Build the swscale library&#xA;opencv4:x64-windows                               4.6.0#6             computer vision library&#xA;opencv4:x86-windows                               4.6.0#6             computer vision library&#xA;opencv4[default-features]:x64-windows                                 Platform-dependent default features&#xA;opencv4[default-features]:x86-windows                                 Platform-dependent default features&#xA;opencv4[dnn]:x64-windows                                              Enable dnn module&#xA;opencv4[dnn]:x86-windows                                              Enable dnn module&#xA;opencv4[ffmpeg]:x64-windows                                           ffmpeg support for opencv&#xA;opencv4[ffmpeg]:x86-windows                                           ffmpeg support for opencv&#xA;opencv4[jpeg]:x64-windows                                             JPEG support for opencv&#xA;opencv4[jpeg]:x86-windows                                             JPEG support for opencv&#xA;opencv4[png]:x64-windows                                              PNG support for opencv&#xA;opencv4[png]:x86-windows                                              PNG support for opencv&#xA;opencv4[qt]:x64-windows                                               Qt GUI support for opencv&#xA;opencv4[qt]:x86-windows                                               Qt GUI support for opencv&#xA;opencv4[quirc]:x64-windows                                            Enable QR code module&#xA;opencv4[quirc]:x86-windows                                            Enable QR code module&#xA;opencv4[tiff]:x64-windows                                             TIFF support for opencv&#xA;opencv4[tiff]:x86-windows                                             TIFF support for opencv&#xA;opencv4[webp]:x64-windows                                             WebP support for opencv&#xA;opencv4[webp]:x86-windows                                             WebP support for opencv&#xA;opencv:x64-windows                                4.6.0               Computer vision library&#xA;opencv:x86-windows                                4.6.0               Computer vision library&#xA;opencv[default-features]:x64-windows                                  Platform-dependent default features&#xA;opencv[default-features]:x86-windows                                  Platform-dependent default features&#xA;opencv[dnn]:x64-windows                                               Enable dnn module&#xA;opencv[dnn]:x86-windows                                               Enable dnn module&#xA;opencv[jpeg]:x64-windows                                              JPEG support for opencv&#xA;opencv[jpeg]:x86-windows                                              JPEG support for opencv&#xA;opencv[png]:x64-windows                                               PNG support for opencv&#xA;opencv[png]:x86-windows                                               PNG support for opencv&#xA;opencv[quirc]:x64-windows                                             Enable QR code module&#xA;opencv[quirc]:x86-windows                                             Enable QR code module&#xA;opencv[tiff]:x64-windows                                              TIFF support for opencv&#xA;opencv[tiff]:x86-windows                                              TIFF support for opencv&#xA;opencv[webp]:x64-windows                                              WebP support for opencv&#xA;opencv[webp]:x86-windows                                              WebP support for opencv&#xA;

    &#xA;

    Other Environments :

    &#xA;

    OS: Windows 11 x64 Professional Workstation&#xA;IDE: Visual Studio 2022&#xA;Project C&#x2B;&#x2B; Standard: C&#x2B;&#x2B;14&#xA;Project Platform: x64 Release&#xA;

    &#xA;

  • Why convert wav to mp3 get different length

    13 avril 2022, par sybil

    I use NAudio and NAudio.Lame to convert a wav file to mp3 file,code like that :

    &#xA;

    using var reader = new WaveFileReader(file);&#xA;using var ms = new MemoryStream();&#xA;var writer = new LameMP3FileWriter(ms, reader.WaveFormat, 32);&#xA;reader.CopyTo(writer);&#xA;writer.Flush();&#xA;File.WriteAllBytes(file.Replace("wav", "mp3"), ms.ToArray());&#xA;

    &#xA;

    the wav file length is 1500ms,but the mp3 file length is 1557ms.

    &#xA;

    And I do the same thing by using ffmpeg.exe,command like that :

    &#xA;

    ffmpeg -i c:\2\xxx.wav c:\2\xxx.mp3&#xA;

    &#xA;

    the output info :

    &#xA;

    ffmpeg version 5.0.1-essentials_build-www.gyan.dev Copyright (c) 2000-2022 the FFmpeg developers&#xA;  built with gcc 11.2.0 (Rev7, Built by MSYS2 project)&#xA;  configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-lzma --enable-zlib --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libaom --enable-libopenjpeg --enable-libvpx --enable-libass --enable-libfreetype --enable-libfribidi --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora --enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband&#xA;  libavutil      57. 17.100 / 57. 17.100&#xA;  libavcodec     59. 18.100 / 59. 18.100&#xA;  libavformat    59. 16.100 / 59. 16.100&#xA;  libavdevice    59.  4.100 / 59.  4.100&#xA;  libavfilter     8. 24.100 /  8. 24.100&#xA;  libswscale      6.  4.100 /  6.  4.100&#xA;  libswresample   4.  3.100 /  4.  3.100&#xA;  libpostproc    56.  3.100 / 56.  3.100&#xA;Guessed Channel Layout for Input Stream #0.0 : mono&#xA;Input #0, wav, from &#x27;c:\2\xxx.wav&#x27;:&#xA;  Duration: 00:00:01.50, bitrate: 768 kb/s&#xA;  Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, mono, s16, 768 kb/s&#xA;Stream mapping:&#xA;  Stream #0:0 -> #0:0 (pcm_s16le (native) -> mp3 (libmp3lame))&#xA;Press [q] to stop, [?] for help&#xA;Output #0, mp3, to &#x27;c:\2\xxx.mp3&#x27;:&#xA;  Metadata:&#xA;    TSSE            : Lavf59.16.100&#xA;  Stream #0:0: Audio: mp3, 48000 Hz, mono, s16p&#xA;    Metadata:&#xA;      encoder         : Lavc59.18.100 libmp3lame&#xA;size=      12kB time=00:00:01.51 bitrate=  66.2kbits/s speed= 137x&#xA;video:0kB audio:12kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.928711%&#xA;

    &#xA;

    And I get a mp3 file which length is 1536ms.&#xA;So,why the length changed ?&#xA;Thanks for reading.

    &#xA;

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