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• Problem using -to, combining -to with framerate change

  21 avril 2019, par LLL

  I have a question regarding the use of the -to option :

  In FFmpeg version 3 (at least 3.2.12 included in Debian 9), -to was an output only option. In more recent version it seems to be accepted as an input option as well (as written here https://www.ffmpeg.org/ffmpeg.html#Main-options) but I run into limitations when using in conjunction with -r.
  What I expect, if I increase the framerate of the input, is that the output will be shorter. But it is not the case if I’m not using the whole input :

  ffmpeg -r 30 -to 10 -i my18fpsFile.avi out.mp4

  out.mp4 will be 10 seconds long, so the input has been read further than 10 seconds in.
  In other terms, even as an input option, it seems to behave like an output option.

  Tested with ffmpeg version N-48102-g7cab5471b2-static https://johnvansickle.com/ffmpeg/ on Debian Stretch.

  Thanks for your advice or confirmation that this is not normal.

  Edit : Thank you Gyan for your reply and your explanation.

  While it seems to work, some testing makes me remember why I wasn’t satisfied with this solution :
  Stating -r as an input option forces the framerate for the reading of the input and ensures one frame in the input is one frame in the output. This is what I want.

  Using yours solution with the filter on the output does cause dropped frames sometimes (which I have never had with -r).
  However, some more testing draws me to the conclusion that the dropped frames problem happens only with an mkv container ! Your solution works fine with other containers (as far as I have tested), but with mkv (and various video codecs, it doesn’t seem to make a difference), I get a lot of dropped frames.
  Using -r with mkv causes no dropped frames.

  In conclusion, I’m not sure how to generalize this solution, as avoiding mkv is annoying for me.
  But thank you, and if anyone has some more experience or ideas, please chime in.

  Adding logs :
  Note the line :
  [avi @ 0x6cf6880] parser not found for codec rawvideo, packets or times may be invalid
  I guess it is the cause of the problem ? Is there a solution if the files are raw avi with no index ?

  Although the warning is the same, I don’t get dropped frames if I use the exact same command only with f.mov instead of mkv.

  ffmpeg -v 40 -to 10 -i f.avi -vf setpts=N/30/TB -r 30 f.mkv
  
  ffmpeg version N-48102-g7cab5471b2-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libvmaf --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libdav1d --enable-libxvid --enable-libzvbi --enable-libzimg
  
    libavutil      56. 26.100 / 56. 26.100
  
    libavcodec     58. 46.100 / 58. 46.100
  
    libavformat    58. 26.100 / 58. 26.100
  
    libavdevice    58.  6.101 / 58.  6.101
  
    libavfilter     7. 48.100 /  7. 48.100
  
    libswscale      5.  4.100 /  5.  4.100
  
    libswresample   3.  4.100 /  3.  4.100
  
    libpostproc    55.  4.100 / 55.  4.100
  
  [avi @ 0x6cf6880] parser not found for codec rawvideo, packets or times may be invalid.
  
      Last message repeated 1 times
  
  Input #0, avi, from 'f.avi':
  
    Duration: 00:01:11.62, start: 0.000000, bitrate: 846067 kb/s
  
      Stream #0:0: Video: rawvideo, 1 reference frame, bgr24, 1632x1200, 846638 kb/s, 18 fps, 18 tbr, 18 tbn, 18 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [graph 0 input from stream 0:0 @ 0x6d0fc00] w:1632 h:1200 pixfmt:bgr24 tb:1000/17999 fr:17999/1000 sar:0/1 sws_param:flags=2
  
  [auto_scaler_0 @ 0x6d105c0] w:iw h:ih flags:'bicubic' interl:0
  
  [format @ 0x6cfe5c0] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_setpts_0' and the filter 'format'
  
  [trim_in_0_0 @ 0x6d109c0] TB:0.055559 FRAME_RATE:17.999000 SAMPLE_RATE:nan
  
  [auto_scaler_0 @ 0x6d105c0] w:1632 h:1200 fmt:bgr24 sar:0/1 -> w:1632 h:1200 fmt:yuv444p sar:0/1 flags:0x4
  
  [libx264 @ 0x6cfb2c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
  
  [libx264 @ 0x6cfb2c0] profile High 4:4:4 Predictive, level 4.0, 4:4:4, 8-bit
  
  [libx264 @ 0x6cfb2c0] 264 - core 157 r2935 545de2f - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x1:0x111 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=4 threads=6 lookahead_threads=1 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=0 weightp=2 keyint=250 keyint_min=25 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
  
  Output #0, matroska, to 'f.mkv':
  
    Metadata:
  
      encoder         : Lavf58.26.100
  
      Stream #0:0: Video: h264 (libx264), 1 reference frame (H264 / 0x34363248), yuv444p, 1632x1200, q=-1--1, 30 fps, 1k tbn, 30 tbc
  
      Metadata:
  
        encoder         : Lavc58.46.100 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  Past duration 0.666481 too large
  
  *** dropping frame 5 from stream 0 at ts 3
  
  Past duration 0.666191 too large
  
  *** dropping frame 9 from stream 0 at ts 8
  
  Past duration 0.665916 too large
  
  *** dropping frame 13 from stream 0 at ts 13
  
  Past duration 0.665642 too large
  
  *** dropping frame 17 from stream 0 at ts 18
  
  Past duration 0.665367 too large
  
  *** dropping frame 21 from stream 0 at ts 23
  
  Past duration 0.665092 too large
  
  *** dropping frame 25 from stream 0 at ts 28
  
  Past duration 0.664803 too large
  
  *** dropping frame 29 from stream 0 at ts 33me=00:00:00.00 bitrate=N/A dup=0 drop=6 speed=   0x    
  
  Past duration 0.664528 too large
  
  *** dropping frame 33 from stream 0 at ts 38
  
  Past duration 0.664253 too large
  
  *** dropping frame 37 from stream 0 at ts 43
  
  Past duration 0.663979 too large
  
  *** dropping frame 41 from stream 0 at ts 48
  
  Past duration 0.663689 too large
  
  *** dropping frame 45 from stream 0 at ts 53
  
  Past duration 0.663414 too large      1kB time=00:00:00.00 bitrate=N/A dup=0 drop=11 speed=   0x    
  
  *** dropping frame 49 from stream 0 at ts 58
  
  Past duration 0.663139 too large
  
  *** dropping frame 53 from stream 0 at ts 63ime=00:00:00.00 bitrate=5768.0kbits/s dup=0 drop=12 speed=0.00049x    
  
  Past duration 0.662865 too large
  
  *** dropping frame 57 from stream 0 at ts 68ime=00:00:00.13 bitrate=  43.0kbits/s dup=0 drop=13 speed=0.0514x    
  
  Past duration 0.662590 too large
  
  *** dropping frame 61 from stream 0 at ts 73ime=00:00:00.30 bitrate=  19.2kbits/s dup=0 drop=14 speed=0.094x    
  
  Past duration 0.662300 too large
  
  *** dropping frame 65 from stream 0 at ts 78ime=00:00:00.46 bitrate=  12.3kbits/s dup=0 drop=15 speed=0.125x    
  
  Past duration 0.662025 too large       1kB time=00:00:00.60 bitrate=   9.6kbits/s dup=0 drop=16 speed=0.142x    
  
  *** dropping frame 69 from stream 0 at ts 83
  
  Past duration 0.661751 too large       1kB time=00:00:00.76 bitrate=   7.5kbits/s dup=0 drop=17 speed=0.162x    
  
  *** dropping frame 73 from stream 0 at ts 88
  
  Past duration 0.661476 too large       1kB time=00:00:00.93 bitrate=   6.2kbits/s dup=0 drop=18 speed=0.175x    
  
  *** dropping frame 77 from stream 0 at ts 93
  
  Past duration 0.661201 too large
  
  *** dropping frame 81 from stream 0 at ts 98ime=00:00:01.13 bitrate=8036.9kbits/s dup=0 drop=19 speed=0.193x    
  
  Past duration 0.660912 too large
  
  *** dropping frame 85 from stream 0 at ts 103me=00:00:01.30 bitrate=7005.3kbits/s dup=0 drop=20 speed=0.204x    
  
  Past duration 0.660637 too large
  
  *** dropping frame 89 from stream 0 at ts 108me=00:00:01.46 bitrate=6208.3kbits/s dup=0 drop=21 speed=0.21x    
  
  Past duration 0.660362 too large
  
  *** dropping frame 93 from stream 0 at ts 113
  
  Past duration 0.660088 too large    1113kB time=00:00:01.76 bitrate=5154.9kbits/s dup=0 drop=23 speed=0.235x    
  
  *** dropping frame 97 from stream 0 at ts 118
  
  Past duration 0.659813 too large    1113kB time=00:00:01.83 bitrate=4969.4kbits/s dup=0 drop=24 speed=0.229x    
  
  *** dropping frame 101 from stream 0 at ts 123
  
  Past duration 0.659523 too large
  
  *** dropping frame 105 from stream 0 at ts 128e=00:00:02.13 bitrate=4270.8kbits/s dup=0 drop=25 speed=0.235x    
  
  Past duration 0.659248 too large
  
  *** dropping frame 109 from stream 0 at ts 133
  
  Past duration 0.658974 too large    2399kB time=00:00:02.43 bitrate=8075.2kbits/s dup=0 drop=27 speed=0.252x    
  
  *** dropping frame 113 from stream 0 at ts 138
  
  Past duration 0.658699 too large
  
  *** dropping frame 117 from stream 0 at ts 143e=00:00:02.63 bitrate=7462.1kbits/s dup=0 drop=28 speed=0.25x    
  
  Past duration 0.658424 too large
  
  *** dropping frame 121 from stream 0 at ts 148
  
  Past duration 0.658134 too large    2399kB time=00:00:02.93 bitrate=6699.1kbits/s dup=0 drop=30 speed=0.266x    
  
  *** dropping frame 125 from stream 0 at ts 153
  
  Past duration 0.657860 too large
  
  *** dropping frame 129 from stream 0 at ts 158e=00:00:03.13 bitrate=6271.6kbits/s dup=0 drop=31 speed=0.265x    
  
  Past duration 0.657585 too large
  
  *** dropping frame 133 from stream 0 at ts 163
  
  Past duration 0.657310 too large    2399kB time=00:00:03.33 bitrate=5895.4kbits/s dup=0 drop=33 speed=0.271x    
  
  *** dropping frame 137 from stream 0 at ts 168e=00:00:03.46 bitrate=5667.6kbits/s dup=0 drop=33 speed=0.269x    
  
  Past duration 0.657036 too large
  
  *** dropping frame 141 from stream 0 at ts 173
  
  Past duration 0.656746 too large
  
  No more output streams to write to, finishing.e=00:00:03.80 bitrate=5171.0kbits/s dup=0 drop=35 speed=0.279x    
  
  frame=  145 fps=8.0 q=-1.0 Lsize=    4590kB time=00:00:05.90 bitrate=6372.0kbits/s dup=0 drop=35 speed=0.326x    
  
  video:4588kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.042357%
  
  Input file #0 (f.avi):
  
    Input stream #0:0 (video): 181 packets read (1063411200 bytes); 181 frames decoded; 
  
    Total: 181 packets (1063411200 bytes) demuxed
  
  Output file #0 (f.mkv):
  
    Output stream #0:0 (video): 145 frames encoded; 145 packets muxed (4698140 bytes); 
  
    Total: 145 packets (4698140 bytes) muxed
  
  [AVIOContext @ 0x6cfe940] Statistics: 20 seeks, 33 writeouts
  
  [libx264 @ 0x6cfb2c0] frame I:4     Avg QP:25.17  size: 84331
  
  [libx264 @ 0x6cfb2c0] frame P:40    Avg QP:26.64  size: 47807
  
  [libx264 @ 0x6cfb2c0] frame B:101   Avg QP:27.85  size: 24236
  
  [libx264 @ 0x6cfb2c0] consecutive B-frames:  4.1%  8.3%  2.1% 85.5%
  
  [libx264 @ 0x6cfb2c0] mb I  I16..4: 29.5%  0.0% 70.5%
  
  [libx264 @ 0x6cfb2c0] mb P  I16..4: 12.0%  0.0% 20.1%  P16..4: 38.5% 16.5%  4.5%  0.0%  0.0%    skip: 8.4%
  
  [libx264 @ 0x6cfb2c0] mb B  I16..4:  1.8%  0.0%  2.7%  B16..8: 46.5% 11.4%  1.6%  direct: 7.6%  skip:28.4%  L0:40.6% L1:55.6% BI: 3.8%
  
  [libx264 @ 0x6cfb2c0] coded y,u,v intra: 55.9% 11.8% 19.2% inter: 22.1% 1.1% 2.6%
  
  [libx264 @ 0x6cfb2c0] i16 v,h,dc,p: 30% 15%  7% 48%
  
  [libx264 @ 0x6cfb2c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 16% 18%  7%  8%  8%  7%  7%  3%
  
  [libx264 @ 0x6cfb2c0] Weighted P-Frames: Y:17.5% UV:10.0%
  
  [libx264 @ 0x6cfb2c0] ref P L0: 54.3% 15.8% 20.0%  8.8%  1.2%
  
  [libx264 @ 0x6cfb2c0] ref B L0: 87.9%  9.3%  2.8%
  
  [libx264 @ 0x6cfb2c0] ref B L1: 95.9%  4.1%
  
  [libx264 @ 0x6cfb2c0] kb/s:6263.27
  
  [AVIOContext @ 0x6cff580] Statistics: 1063666996 bytes read, 4 seeks

• ffmpeg cannot grab the audio played through the speaker under windows 10

  6 mars 2024, par shangping

  I am using ffmpeg to grab screen. It used to work well under win7 using UScreenCapture and virtual-audio-capturer (all x86 version). On win10, the audio is not recorded. (I cannot hear any sound while playing back). I am using ffmpeg/uscreencapture/virtual-audio-capturer all win32 version since virtual-audio-capturer has no x64 release.

  



  So my question is : How can I record the video and the audio correctly using ffmpeg ?

  



  Here is the screen dump out :
first the direct show devices on my system

  



  C:\ffmpeg-20190403-ee16d14-win32-static\bin>ffmpeg -list_devices true -f dshow -i dummy
ffmpeg version N-93528-gee16d14b0a Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.2.1 (GCC) 20190212
  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. 26.100 / 56. 26.100
  libavcodec     58. 48.101 / 58. 48.101
  libavformat    58. 26.101 / 58. 26.101
  libavdevice    58.  7.100 / 58.  7.100
  libavfilter     7. 48.100 /  7. 48.100
  libswscale      5.  4.100 /  5.  4.100
  libswresample   3.  4.100 /  3.  4.100
  libpostproc    55.  4.100 / 55.  4.100
[dshow @ 06303ac0] DirectShow video devices (some may be both video and audio devices)
[dshow @ 06303ac0]  "UScreenCapture"
[dshow @ 06303ac0]     Alternative name "@device_sw_{860BB310-5D01-11D0-BD3B-00A0C911CE86}\UScreenCapture"
[dshow @ 06303ac0] DirectShow audio devices
[dshow @ 06303ac0]  "Microphone Array (Realtek(R) Audio)"
[dshow @ 06303ac0]     Alternative name "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\wave_{9F102091-1843-44C8-B20E-C6F2E0F11A0F}"
[dshow @ 06303ac0]  "virtual-audio-capturer"
[dshow @ 06303ac0]     Alternative name "@device_sw_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\{8E14549B-DB61-4309-AFA1-3578E927E935}"
dummy: Immediate exit requested


  



  2nd, when I use virtual audio capturer, ffmpeg just failed :

  



  C:\ffmpeg-20190403-ee16d14-win32-static\bin>ffmpeg -f dshow -i video="UScreenCapture":audio="Microphone Array (Realtek(R) Audio)" -vf crop=1075:717:189:81 -vcodec mpeg4 -qscale 0 -framerate 60 -acodec libmp3lame -ab 128000 -async 1 output.aviffmpeg -f dshow -i video="UScreenCapture":audio="virtual-audio-capturer" -vf crop=1075:717:189:81 -vcodec mpeg4 -qscale 0 -framerate 60 -acodec libmp3lame -ab 128000 -async 1 output.avi
ffmpeg version N-93528-gee16d14b0a Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.2.1 (GCC) 20190212
  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. 26.100 / 56. 26.100
  libavcodec     58. 48.101 / 58. 48.101
  libavformat    58. 26.101 / 58. 26.101
  libavdevice    58.  7.100 / 58.  7.100
  libavfilter     7. 48.100 /  7. 48.100
  libswscale      5.  4.100 /  5.  4.100
  libswresample   3.  4.100 /  3.  4.100
  libpostproc    55.  4.100 / 55.  4.100
Guessed Channel Layout for Input Stream #0.1 : stereo
Input #0, dshow, from 'video=UScreenCapture:audio=Microphone Array (Realtek(R) Audio)':
  Duration: N/A, start: 6333.289000, bitrate: N/A
    Stream #0:0: Video: rawvideo, bgr24, 3200x1080, 15 fps, 15 tbr, 10000k tbn, 10000k tbc
    Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
IMMDeviceEnumerator::GetDefaultAudioEndpoint failed: hr = 0x80070490
[dshow @ 062f4ac0] real-time buffer [UScreenCapture] [video input] too full or near too full (340% of size: 3041280 [rtbufsize parameter])! frame dropped!


  



  When I use the other audio devices, it seems working but there is not audio recorded :

  



  ffmpeg -f dshow -i video="UScreenCapture":audio="Microphone Array (Realtek(R) Audio)" -vf crop=1075:717:189:81 -vcodec mpeg4 -qscale 0 -framerate 60 -acodec libmp3lame -ab 128000 -async 1 output.avi

    C:\ffmpeg-20190403-ee16d14-win32-static\bin>ffmpeg -f dshow -i video="UScreenCapture":audio="Microphone Array (Realtek(R) Audio)" -vf crop=1075:717:189:81 -vcodec mpeg4 -qscale 0 -framerate 60 -acodec libmp3lame -ab 128000 -async 1 output.avi
    ffmpeg version N-93528-gee16d14b0a Copyright (c) 2000-2019 the FFmpeg developers
      built with gcc 8.2.1 (GCC) 20190212
      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. 26.100 / 56. 26.100
      libavcodec     58. 48.101 / 58. 48.101
      libavformat    58. 26.101 / 58. 26.101
      libavdevice    58.  7.100 / 58.  7.100
      libavfilter     7. 48.100 /  7. 48.100
      libswscale      5.  4.100 /  5.  4.100
      libswresample   3.  4.100 /  3.  4.100
      libpostproc    55.  4.100 / 55.  4.100
    Guessed Channel Layout for Input Stream #0.1 : stereo
    Input #0, dshow, from 'video=UScreenCapture:audio=Microphone Array (Realtek(R) Audio)':
      Duration: N/A, start: 6168.067000, bitrate: N/A
        Stream #0:0: Video: rawvideo, bgr24, 3200x1080, 15 fps, 15 tbr, 10000k tbn, 10000k tbc
        Stream #0:1: Audio: pcm_s16le, 44100 Hz, stereo, s16, 1411 kb/s
    Please use -q:a or -q:v, -qscale is ambiguous
    Stream mapping:
      Stream #0:0 -> #0:0 (rawvideo (native) -> mpeg4 (native))
      Stream #0:1 -> #0:1 (pcm_s16le (native) -> mp3 (libmp3lame))
    Press [q] to stop, [?] for help
    -async is forwarded to lavfi similarly to -af aresample=async=1:min_hard_comp=0.100000:first_pts=0.
    Output #0, avi, to 'output.avi':
      Metadata:
        ISFT            : Lavf58.26.101
        Stream #0:0: Video: mpeg4 (FMP4 / 0x34504D46), yuv420p(progressive), 1075x717, q=2-31, 200 kb/s, 15 fps, 15 tbn, 15 tbc
        Metadata:
          encoder         : Lavc58.48.101 mpeg4
        Side data:
          cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
        Stream #0:1: Audio: mp3 (libmp3lame) (U[0][0][0] / 0x0055), 44100 Hz, stereo, s16p, 128 kb/s
        Metadata:
          encoder         : Lavc58.48.101 libmp3lame
    frame=    8 fps=0.0 q=0.0 size=     522kB time=00:00:00.53 bitrate=8013.1kbitsframe=   16 fps= 16 q=0.0 size=    1034kB time=00:00:01.06 bitrate=7938.7kbitsframe=   23 fps= 15 q=0.0 size=    1546kB time=00:00:01.53 bitrate=8258.0kbitsframe=   31 fps= 15 q=0.0 size=    2058kB time=00:00:02.06 bitrate=8156.4kbitsframe=   38 fps= 15 q=0.0 size=    2058kB time=00:00:02.53 bitrate=6653.9kbitsframe=   46 fps= 15 q=0.0 size=    2570kB time=00:00:03.06 bitrate=6864.4kbitsframe=   54 fps= 15 q=0.0 size=    3082kB time=00:00:03.60 bitrate=7012.6kbitsframe=   61 fps= 15 q=0.0 size=    3338kB time=00:00:04.06 bitrate=6723.5kbitsframe=   69 fps= 15 q=0.0 size=    3850kB time=00:00:04.60 bitrate=6855.8kbitsframe=   76 fps= 15 q=0.0 size=    4106kB time=00:00:05.06 bitrate=6638.2kbitsframe=   84 fps= 15 q=0.0 size=    4618kB time=00:00:05.60 bitrate=6755.0kbitsframe=   91 fps= 15 q=0.0 size=    4874kB time=00:00:06.06 bitrate=6581.1kbitsframe=   99 fps= 15 q=0.0 size=    5130kB time=00:00:06.60 bitrate=6367.0kbitsframe=  106 fps= 15 q=0.0 size=    5642kB time=00:00:07.06 bitrate=6540.1kbitsframe=  114 fps= 15 q=0.0 size=    6154kB time=00:00:07.66 bitrate=6575.3kbitsframe=  121 fps= 15 q=0.0 size=    6410kB time=00:00:08.13 bitrate=6455.9kbitsframe=  129 fps= 15 q=0.0 size=    6666kB time=00:00:08.66 bitrate=6300.6kbitsframe=  136 fps= 15 q=0.0 size=    6922kB time=00:00:09.13 bitrate=6208.3kbitsframe=  144 fps= 15 q=0.0 size=    7434kB time=00:00:09.66 bitrate=6299.7kbitsframe=  151 fps= 15 q=0.0 size=    7690kB time=00:00:10.13 bitrate=6216.5kbitsframe=  159 fps= 15 q=0.0 size=    7946kB time=00:00:10.66 bitrate=6102.3kbitsframe=  167 fps= 15 q=0.0 size=    8458kB time=00:00:11.20 bitrate=6186.2kbitsframe=  174 fps= 15 q=0.0 size=    8970kB time=00:00:11.66 bitrate=6298.3kbitsframe=  182 fps= 15 q=0.0 size=    8970kB time=00:00:12.20 bitrate=6022.9kbitsframe=  189 fps= 15 q=0.0 size=    9482kB time=00:00:12.66 bitrate=6132.2kbitsframe=  190 fps= 15 q=0.0 Lsize=    9602kB time=00:00:12.73 bitrate=6177.3kbits/s speed=   1x
    video:9382kB audio:194kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.265721%
    [dshow @ 06393f40] real-time buffer [UScreenCapture] [video input] too full or near too full (340% of size: 3041280 [rtbufsize parameter])! frame dropped!
    Exiting normally, received signal 2.


  


• About Ffmpeg,Console show 'frame=0 fps=0.0 q=0.0 Lsize=0kB time=00:00:00.00' No data pull&push

  9 janvier 2019, par Lus

  I want to use Ffmpeg to pull&push video stream from HLS to RTMP.at first it’s normal,but when I open more,it’s run normally ,but no video data pull&push

  Environment：Windows64+Ngg-§rtmp-static+Ffmpeg-static+Java1.8

  It’s useless,even if I restart rtmp-server.

  ffmpeg -i xxx/live.m3u8 -vcodec h264-s 720*480 -an -f flv -y rtmp://xxx

  The first few video streams is normal,but when I open more streams (5+),
  it run normally,but no data pull.like this.

  2019-01-08 10:58:15.658  INFO ->frame=0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=720 speed=   0x
  
  2019-01-08 10:58:16.598  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:16.984  INFO ->[http @ 0000015efb1200c0] Opening 'xxx/1/seghik30.ts' for reading
  
  2019-01-08 10:58:17.083  INFO ->frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=744 speed=   0x    
  
  2019-01-08 10:58:18.033  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:18.146  INFO ->[http @ 0000015efb1200c0] Opening 'xxx/1/seghik31.ts' for reading
  
  2019-01-08 10:58:18.267  INFO ->frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=770 speed=   0x    
  
  2019-01-08 10:58:19.220  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:19.317  INFO ->[http @ 0000015efb1200c0] Opening 'xxx/1/seghik32.ts' for reading
  
  2019-01-08 10:58:19.415  INFO ->[http @ 0000015efb138600] Opening 'xxx/1/seghik33.ts' for reading
  
  2019-01-08 10:58:19.494  INFO ->frame=    0 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=0 drop=795 speed=   0x    
  
  2019-01-08 10:58:20.375  INFO ->[http @ 0000015efc568280] Opening 'xxx/1/live.m3u8' for reading
  
  2019-01-08 10:58:20.486  INFO ->[http @ 0000015efb138600] Opening 'xxx/1/seghik34.ts' for reading