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• How to solve the incremental delay in ffplay streaming ?

  26 avril 2021, par Nilton Garcia

  Problem : Incremental streaming runtime delay with FFPLAY

  


  Question : Is there a way to clear the delay buffer at run time ?

  


  I'm using FFPLAY to play an RTP stream. In the first few minutes the delay is constant however, after 1h the delay increases by a few milliseconds generating in the end seconds of delayed increases.

  


  I have tested several protocols : SRT, RTP and UDP, RTMP and the behavior is the same with FFPLAY.

  


  Command used to play an RTP audio stream :

  


  ffplay -max_delay 100000 -flags low_delay -probesize 32 -fflags nobuffer+fastseek+flush_packets -analyzeduration 0 -protocol_whitelist file,rtp,udp -i audio.sdp -loglevel info -nodisp


  


  I have tested and made several combinations of flags and so far without success.

  


  Arquivo .SDP

  


  SDP:
v=0
o=- 0 0 IN IP4 10.50.50.14
s=FONTE DE AUDIO
c=IN IP4 10.50.50.14
t=0 0
a=tool:libavformat 58.29.100
m=audio 3029 RTP/AVP 127
b=AS:1536
a=rtpmap:127 L16/32000/2


  


  My version FFPLAY

  


  ffplay version 4.2.2-0york0~18.04 Copyright (c) 2003-2019 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
  configuration: --prefix=/usr --extra-version='0york0~18.04' --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100


  


• FFmpeg - MP4 file converted from PNG files is not playable [closed]

  2 mai 2024, par StamShamen

  I am attempting to use FFmpeg and JavaScript to convert multiple PNG files to an MP4 video. However, sometimes the output video is not playable (1kb) and no error appears in the output.

  


  This is the command that I run :

  


  ffmpeg -y -r 25 -i "videos-reporter/123/screenshots/%04d.png" -c:v libx264 -preset medium -crf 20 -pix_fmt yuv420p -vf "scale=1200:trunc(ow/a/2)*2,setpts=3.0*PTS" -threads 4 "videos-reporter/123/video.mp4"


  


  Output of playable video :

  


  Input #0, image2, from '/workspace/1/s/videos-reporter/MC4wMDM0NzUwNjg5NTc2NzMwMjI=/a464584b4d03585bd68abc0326e20b9a/screenshots/%04d.png':
  Duration: 00:00:01.44, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: png, rgba(pc), 1920x1080, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x53a1000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x53a1000] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x53a1000] 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=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=4 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=10 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, mp4, to 'videos-reporter/MC4wMDM0NzUwNjg5NTc2NzMwMjI=/a464584b4d03585bd68abc0326e20b9a/video.mp4':
  Metadata:
    encoder         : Lavf58.24.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1200x674, q=-1--1, 10 fps, 10240 tbn, 10 tbc
    Metadata:
      encoder         : Lavc58.42.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
frame=   52 fps=0.0 q=25.0 size=       0kB time=00:00:00.10 bitrate=   3.8kbits/s dup=34 drop=0 speed=0.125x    
video:84kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.457641%
[libx264 @ 0x53a1000] frame I:4     Avg QP: 5.16  size: 14568
[libx264 @ 0x53a1000] frame P:27    Avg QP:15.86  size:   790
[libx264 @ 0x53a1000] frame B:76    Avg QP:12.71  size:    73
[libx264 @ 0x53a1000] consecutive B-frames:  3.7%  1.9%  8.4% 86.0%
[libx264 @ 0x53a1000] mb I  I16..4: 87.8%  4.1%  8.1%
[libx264 @ 0x53a1000] mb P  I16..4:  3.1%  2.0%  0.4%  P16..4:  0.4%  0.1%  0.0%  0.0%  0.0%    skip:93.9%
[libx264 @ 0x53a1000] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  1.3%  0.1%  0.0%  direct: 0.0%  skip:98.6%  L0:42.1% L1:57.7% BI: 0.2%
[libx264 @ 0x53a1000] 8x8 transform intra:12.8% inter:47.1%
[libx264 @ 0x53a1000] coded y,uvDC,uvAC intra: 5.9% 5.8% 5.1% inter: 0.0% 0.0% 0.0%
[libx264 @ 0x53a1000] i16 v,h,dc,p: 81% 18%  1%  0%
[libx264 @ 0x53a1000] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 16% 60%  0%  0%  0%  0%  0%  1%
[libx264 @ 0x53a1000] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 23% 48% 16%  1%  2%  2%  3%  2%  4%
[libx264 @ 0x53a1000] i8c dc,h,v,p: 90%  7%  2%  0%
[libx264 @ 0x53a1000] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x53a1000] ref P L0: 72.8%  2.5% 14.1% 10.6%
[libx264 @ 0x53a1000] ref B L0: 88.2% 11.0%  0.9%
[libx264 @ 0x53a1000] ref B L1: 99.3%  0.7%
[libx264 @ 0x53a1000] kb/s:63.64


  


  Output of not-playable video :

  


  Input #0, image2, from '/workspace/1/s/videos-reporter/MC4zOTQ2Nzk4NzMwMjU0MTU5Ng==/20ae4ef3d1e642b26d348adc4246965d/screenshots/%04d.png':
  Duration: 00:00:01.60, start: 0.000000, bitrate: N/A
    Stream #0:0: Video: png, rgba(pc), 1920x1080, 25 fps, 25 tbr, 25 tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (png (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0x5490c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0x5490c00] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0x5490c00] 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=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=4 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=10 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, mp4, to 'videos-reporter/MC4zOTQ2Nzk4NzMwMjU0MTU5Ng==/20ae4ef3d1e642b26d348adc4246965d/video.mp4':
  Metadata:
    encoder         : Lavf58.24.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 1200x674, q=-1--1, 10 fps, 10240 tbn, 10 tbc
    Metadata:
      encoder         : Lavc58.42.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1

stderr: frame=   19 fps=5.8 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A dup=12 drop=0 speed=   0x    
stderr: frame=   64 fps= 17 q=25.0 size=       0kB time=00:00:01.30 bitrate=   0.3kbits/s dup=42 drop=0 speed=0.343x    
stderr: frame=  119 fps= 25 q=-1.0 Lsize=     153kB time=00:00:11.60 bitrate= 108.2kbits/s dup=79 drop=0 speed=2.46x    
video:151kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.431093%

stderr: [libx264 @ 0x5490c00] frame I:5     Avg QP: 6.42  size: 14533
[libx264 @ 0x5490c00] frame P:32    Avg QP:16.29  size:  2284
[libx264 @ 0x5490c00] frame B:82    Avg QP:14.77  size:   100
[libx264 @ 0x5490c00] consecutive B-frames:  5.9%  1.7% 15.1% 77.3%
[libx264 @ 0x5490c00] mb I  I16..4: 77.0% 14.4%  8.6%

stderr: [libx264 @ 0x5490c00] mb P  I16..4:  9.2%  3.4%  1.3%  P16..4:  2.5%  0.2%  0.1%  0.0%  0.0%    skip:83.3%
[libx264 @ 0x5490c00] mb B  I16..4:  0.1%  0.0%  0.0%  B16..8:  1.8%  0.1%  0.0%  direct: 0.0%  skip:97.9%  L0:42.9% L1:56.4% BI: 0.7%
[libx264 @ 0x5490c00] 8x8 transform intra:19.2% inter:66.1%
[libx264 @ 0x5490c00] coded y,uvDC,uvAC intra: 6.1% 7.5% 5.4% inter: 0.3% 0.4% 0.0%
[libx264 @ 0x5490c00] i16 v,h,dc,p: 61% 38%  1%  0%
[libx264 @ 0x5490c00] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 47% 15% 37%  0%  0%  0%  0%  0%  0%
[libx264 @ 0x5490c00] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 26% 46% 14%  1%  2%  2%  3%  2%  3%
[libx264 @ 0x5490c00] i8c dc,h,v,p: 85% 13%  3%  0%
[libx264 @ 0x5490c00] Weighted P-Frames: Y:6.2% UV:6.2%
[libx264 @ 0x5490c00] ref P L0: 75.1%  5.0% 16.0%  3.9%  0.0%
[libx264 @ 0x5490c00] ref B L0: 77.6% 19.7%  2.7%
[libx264 @ 0x5490c00] ref B L1: 97.9%  2.1%
[libx264 @ 0x5490c00] kb/s:103.49


  


  Your help is appreciated since I couldn't find any solution for it.

  


• Why does FFMPEG work with 1080p but doesn't work with 720p size… (code included)

  2 avril 2017, par JavaRunner

  I’ve uploaded my fully compiled code with its Makefile here :

  https://pastebin.com/xtCTj06F

  If I set 1280x720 I get the segmentation fault :

  [libx264 @ 0x7fdf4d25a600] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x7fdf4d25a600] profile High, level 3.1
  
  [libx264 @ 0x7fdf4d25a600] 264 - core 148 r2748 97eaef2 - H.264/MPEG-4 AVC codec - Copyleft 2003-2016 - 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=12 keyint_min=1 scenecut=40 intra_refresh=0 rc_lookahead=12 rc=abr mbtree=1 bitrate=3400 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
  
  Output #0, mp4, to '1.mp4':
  
      Stream #0:0: Video: h264, yuv420p, 1280x720, q=2-31, 3400 kb/s, 20 tbn
  
      Stream #0:1: Audio: aac (LC), 44100 Hz, stereo, fltp, 64 kb/s
  
  sws_scale BEGIN
  
  ./MakeVideo.sh: line 2: 26422 Segmentation fault: 11  ./MakeVideo 1.mp4

  There’s some problem with this line :

  std::cout << "sws_scale BEGIN\n";
  
  sws_scale( sws_context, ( const uint8_t * const * ) &rgb, inLinesize, 0, frame->height, frame->data, frame->linesize );
  
  std::cout << "sws_scale END\n";

  but if I set the size of a video to 1920x1080 or to 320x240 - all works fine.

  Is that some sort of a magick ?? Or a bug ?

  OS X 10.12.3
  ffmpeg/3.2.4 —enable-shared —enable-pthreads —enable-gpl —enable-version3 —enable-hardcoded-tables —enable-avresample —cc=clang —host-cflags= —host-ldflags= —enable-libmp3lame —enable-libx264 —enable-libxvid —enable-opencl —disable-lzma —enable-vda