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• FFMPEG fade in/out expressed in milliseconds

  22 juillet 2020, par orestino

  I working on a programmatic sketch to cut, crop and fade in/out audio from a single input video file.
Everything works pretty well except for the audio fade in fade out.

  


  Everything work fine if I set a fade in and fade out time of 1 (or more) seconds. Here's my command :

  


  ffmpeg -ss 0:1:11.10 -i INPUT_FILE.mp4 -filter:a afade=t=in:st=0:d=1.0,afade=t=out:st=55.867:d=1.0 -filter:v crop=720:720:138:0 -to 0:0:56.86 OUTPUT_FILE.mp4


  


  Fade filter stop working if I set time less than 1 secs (say 100ms like the following example).

  


  ffmpeg -ss 0:1:11.10 -i INPUT_FILE.mp4 -filter:a afade=t=in:st=0:d=0.1,afade=t=out:st=56.767:d=0.1 -filter:v crop=720:720:138:0 -to 0:0:56.86 OUTPUT_FILE.mov


  


  I mean, ffmpeg is not complaining about any error but the output video file simply has no fade in or fade out.

  


  Why ?
What I'm doing wrong ?

  


  Thank you so much for your support

  


  Edit 22/07/2020 :
here's the output from the second command :

  


  ffmpeg -ss 0:1:11.10 -i 2020-07-20_00-13-35.mkv -filter:a afade=t=in:st=0:d=0.1,afade=t=out:st=56.767:d=0.1 -filter:v crop=720:720:138:0 -to 0:0:56.86 ./_selections/2020-07-20_00-13-35_R1_crop2_w_fadein_fadeout_0:1:11.10.mov
ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  WARNING: library configuration mismatch
  avcodec     configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared --enable-version3 --disable-doc --disable-programs --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libtesseract --enable-libvo_amrwbenc
  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
Input #0, matroska,webm, from '2020-07-20_00-13-35.mkv':
  Metadata:
    ENCODER         : Lavf57.83.100
  Duration: 00:03:19.23, start: 0.000000, bitrate: 2661 kb/s
    Stream #0:0: Video: h264 (High), yuv420p(progressive), 1440x900, 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
    Metadata:
      DURATION        : 00:03:19.233000000
    Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp (default)
    Metadata:
      title           : audio desktop
      DURATION        : 00:03:19.065000000
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[libx264 @ 0x564dad2f9680] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x564dad2f9680] profile High, level 3.1
[libx264 @ 0x564dad2f9680] 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=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, mov, to './_selections/2020-07-20_00-13-35_R1_crop2_w_fadein_fadeout_0:1:11.10.mov':
  Metadata:
    encoder         : Lavf57.83.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 720x720, q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
    Metadata:
      DURATION        : 00:03:19.233000000
      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) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 128 kb/s (default)
    Metadata:
      title           : audio desktop
      DURATION        : 00:03:19.065000000
      encoder         : Lavc57.107.100 aac
frame= 1706 fps=140 q=-1.0 Lsize=    2685kB time=00:00:56.86 bitrate= 386.7kbits/s speed=4.67x    
video:1681kB audio:942kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.351145%
[libx264 @ 0x564dad2f9680] frame I:7     Avg QP:15.76  size: 60653
[libx264 @ 0x564dad2f9680] frame P:448   Avg QP:23.13  size:  1372
[libx264 @ 0x564dad2f9680] frame B:1251  Avg QP:31.17  size:   545
[libx264 @ 0x564dad2f9680] consecutive B-frames:  1.3%  2.3%  1.4% 95.0%
[libx264 @ 0x564dad2f9680] mb I  I16..4: 29.2% 37.7% 33.1%
[libx264 @ 0x564dad2f9680] mb P  I16..4:  0.1%  0.4%  0.5%  P16..4:  2.1%  0.2%  0.2%  0.0%  0.0%    skip:96.4%
[libx264 @ 0x564dad2f9680] mb B  I16..4:  0.0%  0.3%  0.2%  B16..8:  1.5%  0.1%  0.1%  direct: 0.0%  skip:97.8%  L0:51.7% L1:46.3% BI: 2.0%
[libx264 @ 0x564dad2f9680] 8x8 transform intra:43.2% inter:27.7%
[libx264 @ 0x564dad2f9680] coded y,uvDC,uvAC intra: 35.4% 42.2% 40.1% inter: 0.3% 0.5% 0.3%
[libx264 @ 0x564dad2f9680] i16 v,h,dc,p: 61% 37%  2%  0%
[libx264 @ 0x564dad2f9680] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 30%  7% 59%  2%  0%  0%  0%  1%  1%
[libx264 @ 0x564dad2f9680] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 17% 25% 10%  4%  5%  5%  7%  7%
[libx264 @ 0x564dad2f9680] i8c dc,h,v,p: 66% 19%  7%  7%
[libx264 @ 0x564dad2f9680] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x564dad2f9680] ref P L0: 65.1% 15.3% 13.6%  5.9%
[libx264 @ 0x564dad2f9680] ref B L0: 68.1% 27.1%  4.8%
[libx264 @ 0x564dad2f9680] ref B L1: 95.3%  4.7%
[libx264 @ 0x564dad2f9680] kb/s:242.09
[aac @ 0x564dad2f25a0] Qavg: 606.451


  


• ffmpeg issue when using it from kurento to rtmp stream

  15 juillet 2020, par Maxi

  I successfully managed to connect ffmpeg with an RTP endpoint of my kurento server. On many tries before I got a "Connection timed out" due my docker configuration. In my docker logs I see following now after RTP endpoint creation and starting ffmpeg :

  


  streamy-server_1  | 2020-07-15 08:30:20.397  INFO 49 --- [nio-8080-exec-1] net.bramp.ffmpeg.RunProcessFunction      : ffmpeg -y -v error -protocol_whitelist file,http,https,tcp,tls,udp,rtp -rtbufsize 1500M -re -i /tmp/test.sdp -f flv -vcodec libx264 -pix_fmt yuv420p -s 640x480 -r 20/1 -b:v 1000000 -acodec libmp3lame -ar 44100 -b:a 1000000 -bufsize 4000k -maxrate 1000k -profile:v baseline -deinterlace -preset medium -g 60 -r 30 rtmps://live-api-s.facebook.com:443/rtmp/3163232097002611?xyz
streamy-server_1  | [h264 @ 0x56538aeae0a0] non-existing PPS 0 referenced
streamy-server_1  |     Last message repeated 1 times
streamy-server_1  | [h264 @ 0x56538aeae0a0] decode_slice_header error
streamy-server_1  | [h264 @ 0x56538aeae0a0] no frame!
streamy-server_1  | [h264 @ 0x56538aeae0a0] non-existing PPS 0 referenced
streamy-server_1  |     Last message repeated 1 times
streamy-server_1  | [h264 @ 0x56538aeae0a0] decode_slice_header error
streamy-server_1  | [h264 @ 0x56538aeae0a0] no frame!
streamy-server_1  | [h264 @ 0x56538aeae0a0] non-existing PPS 0 referenced
streamy-server_1  |     Last message repeated 1 times
streamy-server_1  | [h264 @ 0x56538aeae0a0] decode_slice_header error
streamy-server_1  | [h264 @ 0x56538aeae0a0] no frame!
streamy-server_1  | [h264 @ 0x56538aeae0a0] non-existing PPS 0 referenced
streamy-server_1  |     Last message repeated 1 times
streamy-server_1  | [h264 @ 0x56538aeae0a0] decode_slice_header error
streamy-server_1  | [h264 @ 0x56538aeae0a0] no frame!
streamy-server_1  | [h264 @ 0x56538aeae0a0] non-existing PPS 0 referenced
streamy-server_1  |     Last message repeated 1 times
[...] (this is repeated for the next ~20-30 seconds, then continues with:)
kurento_1         | 0:03:00.152967182     1 0x7faa58093b30 INFO    KurentoWebSocketTransport WebSocketTransport.cpp:296:keepAliveSessions: Keep alive 998a9271-615e-490c-acce-6bc22d9592f7
streamy-server_1  | Too many packets buffered for output stream 0:0.
streamy-server_1  | 2020-07-15 08:30:38.361 ERROR 49 --- [nio-8080-exec-1] c.maximummgt.streamy.WebsocketsHandler   : Unknown error while websockets session
streamy-server_1  | 
streamy-server_1  | java.lang.RuntimeException: java.io.IOException: ffmpeg returned non-zero exit status. Check stdout.
streamy-server_1  |     at net.bramp.ffmpeg.job.SinglePassFFmpegJob.run(SinglePassFFmpegJob.java:46) ~[ffmpeg-0.6.2.jar:0.6.2]


  


  At facebook live it does not receive the video stream. In log I just see this message :

  


  Facebook has not received video signal from the video source for some time. Check that the connectivity between the video source and Facebook is sufficient for the source resolution and bitrate. Check your video encoder logs for details. If problems persist, consider improving connection quality or reducing the bitrate of your video source.

  


  On Kurento Java code I am doing following :

  


  


  1. Create an RTP endpoint

     


  


  2. Connect it with the video source from the user

     


  


  3. Create an SDP offer and save it to a file (currently /tmp/test.sdp)

     


  


  4. Process SDP offer with the RTP endpoint

     


  


  5. Start the ffmpeg process with (net.bramp.ffmpeg.builder.FFmpegBuilder) :

     


     FFmpegBuilder builder = new FFmpegBuilder()
.addExtraArgs("-protocol_whitelist", "file,http,https,tcp,tls,udp,rtp")
.addExtraArgs("-rtbufsize", "1500M")
.addExtraArgs("-re")
.setInput("/tmp/test.sdp")
.addOutput(rtmpURL)
.setFormat("flv")
.addExtraArgs("-bufsize", "4000k")
.addExtraArgs("-maxrate", "1000k")
.setAudioCodec("libmp3lame")
.setAudioSampleRate(FFmpeg.AUDIO_SAMPLE_44100)
.setAudioBitRate(1_000_000)
.addExtraArgs("-profile:v", "baseline")
.setVideoCodec("libx264")
.setVideoPixelFormat("yuv420p")
.setVideoResolution(width, height)
.setVideoBitRate(1_000_000)
.setVideoFrameRate(20)
.addExtraArgs("-deinterlace")
.addExtraArgs("-preset", "medium")
.addExtraArgs("-g", "60")
.addExtraArgs("-r", "30")
.done();

FFmpegExecutor executor = new FFmpegExecutor(ffmpeg, ffprobe);
executor.createJob(builder).run();



     


  


  


  Can somebody guide here on this issue ? Thanks in advance

  


  EDIT 01 : I disabled now

  


  // FFmpegExecutor executor = new FFmpegExecutor(ffmpeg, ffprobe);
// executor.createJob(builder).run();


  


  so that ffmpeg does not start automatically. After java created the test.sdp, I ran ffmpeg by myself in the console not to stream to facebook but to a mp4 :

  


  ffmpeg -loglevel debug -protocol_whitelist file,crypto,udp,rtp -re -vcodec libvpx -acodec opus -i /tmp/test.sdp -vcodec libx264 -acodec aac -y output.mp4

  


  The output looks as following - I interrupted it after 25s with CTRL + C

  


  root@app:/var/www# ffmpeg -loglevel debug -protocol_whitelist file,crypto,udp,rtp -re -vcodec libvpx -acodec opus -i /tmp/test.sdp -vcodec libx264 -acodec aac -y output.mp4
ffmpeg version 3.4.6-0ubuntu0.18.04.1 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.3.0-16ubuntu3)
  configuration: --prefix=/usr --extra-version=0ubuntu0.18.04.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  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
Splitting the commandline.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Reading option '-protocol_whitelist' ... matched as AVOption 'protocol_whitelist' with argument 'file,crypto,udp,rtp'.
Reading option '-re' ... matched as option 're' (read input at native frame rate) with argument '1'.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'libvpx'.
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'opus'.
Reading option '-i' ... matched as input url with argument '/tmp/test.sdp'.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'libx264'.
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'aac'.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option 'output.mp4' ... matched as output url.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Applying option y (overwrite output files) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url /tmp/test.sdp.
Applying option re (read input at native frame rate) with argument 1.
Applying option vcodec (force video codec ('copy' to copy stream)) with argument libvpx.
Applying option acodec (force audio codec ('copy' to copy stream)) with argument opus.
Successfully parsed a group of options.
Opening an input file: /tmp/test.sdp.
[NULL @ 0x55c2344e6a00] Opening '/tmp/test.sdp' for reading
[sdp @ 0x55c2344e6a00] Format sdp probed with size=2048 and score=50
[sdp @ 0x55c2344e6a00] audio codec set to: pcm_mulaw
[sdp @ 0x55c2344e6a00] audio samplerate set to: 44000
[sdp @ 0x55c2344e6a00] audio channels set to: 1
[sdp @ 0x55c2344e6a00] video codec set to: h264
[sdp @ 0x55c2344e6a00] RTP Packetization Mode: 1
[udp @ 0x55c2344e90c0] end receive buffer size reported is 131072
[udp @ 0x55c2344e9320] end receive buffer size reported is 131072
[sdp @ 0x55c2344e6a00] setting jitter buffer size to 500
[udp @ 0x55c2344ea0a0] end receive buffer size reported is 131072
[udp @ 0x55c2344ea180] end receive buffer size reported is 131072
[sdp @ 0x55c2344e6a00] setting jitter buffer size to 500
[sdp @ 0x55c2344e6a00] Before avformat_find_stream_info() pos: 305 bytes read:305 seeks:0 nb_streams:2
[libvpx @ 0x55c2344eeb80] v1.7.0
[libvpx @ 0x55c2344eeb80] --prefix=/usr --enable-pic --enable-shared --disable-install-bins --disable-install-srcs --size-limit=16384x16384 --enable-postproc --enable-multi-res-encoding --enable-temporal-denoising --enable-vp9-temporal-denoising --enable-vp9-postproc --target=x86_64-linux-gcc
[libvpx @ 0x55c2344eeb80] Invalid sync code e06101.
[libvpx @ 0x55c2344eeb80] Failed to decode frame: Bitstream not supported by this decoder
[libvpx @ 0x55c2344eeb80] Invalid sync code e06101.
[libvpx @ 0x55c2344eeb80] Failed to decode frame: Bitstream not supported by this decoder
    Last message repeated 1 times
[libvpx @ 0x55c2344eeb80] Invalid sync code e06101.
[libvpx @ 0x55c2344eeb80] Failed to decode frame: Bitstream not supported by this decoder
[sdp @ 0x55c2344e6a00] Non-increasing DTS in stream 1: packet 3 with DTS 5940, packet 4 with DTS 5940
[...]
[sdp @ 0x55c2344e6a00] Non-increasing DTS in stream 1: packet 956 with DTS 2027726, packet 957 with DTS 2027726
[libvpx @ 0x55c2344eeb80] Failed to decode frame: Bitstream not supported by this decoder
[libvpx @ 0x55c2344eeb80] Invalid sync code e06101.
[libvpx @ 0x55c2344eeb80] Failed to decode frame: Bitstream not supported by this decoder
[libvpx @ 0x55c2344eeb80] Invalid sync code e06101.
[libvpx @ 0x55c2344eeb80] Failed to decode frame: Bitstream not supported by this decoder
[libvpx @ 0x55c2344eeb80] Invalid sync code e06101.
[libvpx @ 0x55c2344eeb80] Failed to decode frame: Bitstream not supported by this decoder
[libvpx @ 0x55c2344eeb80] Invalid sync code 4a3bd8.
[sdp @ 0x55c2344e6a00] Non-increasing DTS in stream 1: packet 960 with DTS 2036690, packet 961 with DTS 2036690
[libvpx @ 0x55c2344eeb80] Failed to decode frame: Bitstream not supported by this decoder
[sdp @ 0x55c2344e6a00] interrupted
[sdp @ 0x55c2344e6a00] decoding for stream 1 failed
[sdp @ 0x55c2344e6a00] rfps: 30.000000 0.000926
[sdp @ 0x55c2344e6a00] rfps: 60.000000 0.003706
[sdp @ 0x55c2344e6a00] rfps: 120.000000 0.014824
[sdp @ 0x55c2344e6a00] Setting avg frame rate based on r frame rate
[sdp @ 0x55c2344e6a00] Could not find codec parameters for stream 1 (Video: vp8 (libvpx), 1 reference frame, none(progressive)): unspecified size
Consider increasing the value for the 'analyzeduration' and 'probesize' options
[sdp @ 0x55c2344e6a00] After avformat_find_stream_info() pos: 305 bytes read:305 seeks:0 frames:962
Input #0, sdp, from '/tmp/test.sdp':
  Metadata:
    title           : KMS
  Duration: N/A, start: 0.033000, bitrate: N/A
    Stream #0:0, 0, 1/44000: Audio: opus, 48000 Hz, mono, fltp
    Stream #0:1, 962, 1/90000: Video: vp8, 1 reference frame, none(progressive), 30 fps, 30 tbr, 90k tbn, 90k tbc
Successfully opened the file.
Parsing a group of options: output url output.mp4.
Applying option vcodec (force video codec ('copy' to copy stream)) with argument libx264.
Applying option acodec (force audio codec ('copy' to copy stream)) with argument aac.
Successfully parsed a group of options.
Opening an output file: output.mp4.
[file @ 0x55c234563320] Setting default whitelist 'file,crypto'
Successfully opened the file.
[libvpx @ 0x55c2344eb0e0] v1.7.0
[libvpx @ 0x55c2344eb0e0] --prefix=/usr --enable-pic --enable-shared --disable-install-bins --disable-install-srcs --size-limit=16384x16384 --enable-postproc --enable-multi-res-encoding --enable-temporal-denoising --enable-vp9-temporal-denoising --enable-vp9-postproc --target=x86_64-linux-gcc
Stream mapping:
  Stream #0:1 -> #0:0 (vp8 (libvpx) -> h264 (libx264))
  Stream #0:0 -> #0:1 (opus (native) -> aac (native))
Press [q] to stop, [?] for help
Finishing stream 0:0 without any data written to it.
Finishing stream 0:1 without any data written to it.
detected 2 logical cores
[graph_1_in_0_0 @ 0x55c234561360] Setting 'time_base' to value '1/48000'
[graph_1_in_0_0 @ 0x55c234561360] Setting 'sample_rate' to value '48000'
[graph_1_in_0_0 @ 0x55c234561360] Setting 'sample_fmt' to value 'fltp'
[graph_1_in_0_0 @ 0x55c234561360] Setting 'channel_layout' to value '0x4'
[graph_1_in_0_0 @ 0x55c234561360] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x4
[format_out_0_1 @ 0x55c2345611e0] Setting 'sample_fmts' to value 'fltp'
[format_out_0_1 @ 0x55c2345611e0] Setting 'sample_rates' to value '96000|88200|64000|48000|44100|32000|24000|22050|16000|12000|11025|8000|7350'
[AVFilterGraph @ 0x55c234560620] query_formats: 4 queried, 9 merged, 0 already done, 0 delayed
Nothing was written into output file 0 (output.mp4), because at least one of its streams received no packets.
frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A
video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
Input file #0 (/tmp/test.sdp):
  Input stream #0:0 (audio): 0 packets read (0 bytes); 0 frames decoded (0 samples);
  Input stream #0:1 (video): 0 packets read (0 bytes); 0 frames decoded;
  Total: 0 packets (0 bytes) demuxed
Output file #0 (output.mp4):
  Output stream #0:0 (video): 0 frames encoded; 0 packets muxed (0 bytes);
  Output stream #0:1 (audio): 0 frames encoded (0 samples); 0 packets muxed (0 bytes);
  Total: 0 packets (0 bytes) muxed
0 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x55c234563420] Statistics: 0 seeks, 0 writeouts
[aac @ 0x55c23458bea0] Qavg: -nan
[AVIOContext @ 0x55c2344ef6e0] Statistics: 305 bytes read, 0 seeks
Exiting normally, received signal 2.
root@app:/var/www# ls -lt
total 72
-rw-r--r-- 1 root root     0 Jul 15 09:12 output.mp4


  


• `ffmpeg record audio output device

  11 juillet 2020, par Roy

  i am trying to capture my pulse output device :

  


  alsa_output.pci-0000_00_1b.0.analog-stereo.monitor

  


  with this command :

  


  /usr/bin/ffmpeg -f pulse -i alsa_output.pci-0000_00_1b.0.analog-stereo.monitor -c:a aac -b:a 128k /roee_files/test.wav


  


  i get this output with those warnings, and there is an audio delay :

  


  ffmpeg version 3.4.7 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --extra-ldflags='-Wl,-z,relro ' --extra-cflags=' ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-indev=jack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopus --disable-encoder=libopus --enable-libpulse --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzvbi --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect
  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
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, pulse, from 'alsa_output.pci-0000_00_1b.0.analog-stereo.monitor':
  Duration: N/A, start: 1594460535.507972, bitrate: 1536 kb/s
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
File '/roee_files/test.wav' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, wav, to '/roee_files/test.wav':
  Metadata:
    ISFT            : Lavf57.83.100
    Stream #0:0: Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc57.107.100 aac
[aac @ 0x1aec1a0] Queue input is backward in time
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 120076, current: 116419; changing to 120076. This may result in incorrect timestamps in the output file.
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 120076, current: 117443; changing to 120076. This may result in incorrect timestamps in the output file.
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 120076, current: 118467; changing to 120076. This may result in incorrect timestamps in the output file.
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 120076, current: 119491; changing to 120076. This may result in incorrect timestamps in the output file.
[aac @ 0x1aec1a0] Queue input is backward in time
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 123587, current: 118096; changing to 123587. This may result in incorrect timestamps in the output file.
[wav @ 0x1aeabc0] Non-monotonous DTS in output stream 0:0; previous: 123587, current: 119120; changing to 123587. This may result in incorrect timestamps in the output file.


  


  but,
when i am trying to capture my pulse input device with the same command :

  


  /usr/bin/ffmpeg -f pulse -i alsa_input.pci-0000_00_1b.0.analog-stereo -c:a aac -b:a 128k /roee_files/test.wav


  


  everything works fine without any warning or delay as you can see in this output :

  


  ffmpeg version 3.4.7 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
  configuration: --prefix=/usr --bindir=/usr/bin --datadir=/usr/share/ffmpeg --docdir=/usr/share/doc/ffmpeg --incdir=/usr/include/ffmpeg --libdir=/usr/lib64 --mandir=/usr/share/man --arch=x86_64 --optflags='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic' --extra-ldflags='-Wl,-z,relro ' --extra-cflags=' ' --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libvo-amrwbenc --enable-version3 --enable-bzlib --disable-crystalhd --enable-fontconfig --enable-gcrypt --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libcdio --enable-libdrm --enable-indev=jack --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libmp3lame --enable-nvenc --enable-openal --enable-opencl --enable-opengl --enable-libopenjpeg --enable-libopus --disable-encoder=libopus --enable-libpulse --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis --enable-libv4l2 --enable-libvidstab --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzvbi --enable-avfilter --enable-avresample --enable-postproc --enable-pthreads --disable-static --enable-shared --enable-gpl --disable-debug --disable-stripping --shlibdir=/usr/lib64 --enable-libmfx --enable-runtime-cpudetect
  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
Guessed Channel Layout for Input Stream #0.0 : stereo
Input #0, pulse, from 'alsa_input.pci-0000_00_1b.0.analog-stereo':
  Duration: N/A, start: 1594460998.540483, bitrate: 1536 kb/s
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
File '/roee_files/test.wav' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> aac (native))
Press [q] to stop, [?] for help
Output #0, wav, to '/roee_files/test.wav':
  Metadata:
    ISFT            : Lavf57.83.100
    Stream #0:0: Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, stereo, fltp, 128 kb/s
    Metadata:
      encoder         : Lavc57.107.100 aac
size=     822kB time=00:00:52.45 bitrate= 128.4kbits/s speed=1.07x


  


  i tried what someone suggest here- to uncomment and change the line, default-sample-rate = 44100 , to default-sample-rate = 48000. (in /etc/pulse/daemon.conf file, and restart PA/computer) withot success.

  


  this is my whole section in this file after changing :

  


  ; default-sample-format = s16le
 default-sample-rate = 48000
; alternate-sample-rate = 48000
; default-sample-channels = 2
; default-channel-map = front-left,front-right

; default-fragments = 4
; default-fragment-size-msec = 25

; enable-deferred-volume = yes
; deferred-volume-safety-margin-usec = 8000
; deferred-volume-extra-delay-usec = 0


  


  Does someone can help me solve this issue PLEASE...

  


  does it relate to sample rate, or maybe other problem ?

  


  thank you all...!