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• Failed setup for format dxva2_vld : hwaccel initialisation returned error

  13 juin 2023, par james

  My program is a video player based on ffmpeg implementation, enabling d3d11va and dxva2 hardware acceleration to decode video frames, play most of the video is normal, only a small part of the video will report this error, ffmpeg printed log as follows :
I:2023-06-13 15:34:53 ms:887:No decoder device for codec found
I:2023-06-13 15:34:53 ms:887:Failed setup for format dxva2_vld : hwaccel initialisation returned error.
I:2023-06-13 15:34:53 ms:888:Format dxva2_vld not usable, retrying get_format() without it.
I:2023-06-13 15:34:53 ms:888:decode_slice_header error
I:2023-06-13 15:34:53 ms:888:no frame !

  


  If ffplay is used and d3d11va and dxva2 hardware acceleration is not enabled, the video can be played normally, and the printed video information is as follows :
PS D :\msys64\home\wangj\ffmpeg-4.4.1\buildout\bin> .\ffplay.exe -i D :\Desktop\13132023061300012_1_C1_34.mp4
ffplay version 4.4.1 Copyright (c) 2003-2021 the FFmpeg developers
configuration : —prefix=./buildout —arch=x86 —toolchain=msvc —enable-shared —disable-debug —enable-sdl2 —enable-dxva2 —enable-d3d11va
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D :\Desktop\13132023061300012_1_C1_34.mp4' :
Metadata :
major_brand : isom
minor_version : 512
compatible_brands : isomiso2avc1mp41
encoder : Lavf56.38.102
Duration : 00:00:44.00, start : 0.000000, bitrate : 1706 kb/s
Stream #0:0(und) : Video : h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1920x1080, 1705 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc (default)
Metadata :
handler_name : VideoHandler
vendor_id : [0][0][0][0]

  


  Is this pixel format not supported by d3d11va and dxva2 ? What can I do to get ffplay to play this video file with hardware acceleration ?

  


  When d3d11va and dxva2 hardware acceleration is enabled, most of the videos that can be played also have yuv420p pixel format, why can't this video be played？

  


• Error while adding RTSP stream to Ant media server

  28 juillet 2021, par Jacob

  I have successfully remotely viewed the stream using ffplay -rtsp_transport tcp rtsp ://streamurl.

  


      ffplay version 4.4 Copyright (c) 2003-2021 the FFmpeg developers
  built with Apple clang version 12.0.5 (clang-1205.0.22.9)
  configuration: --prefix=/opt/homebrew/Cellar/ffmpeg/4.4_2 --enable-shared --enable-pthreads --enable-version3 --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-avresample --enable-videotoolbox
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Input #0, rtsp, from 'rtsp://admin:lyne1234@74.65.209.152:554/11/stream1':
  Metadata:
    title           : 10
  Duration: N/A, start: 0.050000, bitrate: N/A
  Stream #0:0: Video: hevc (Main), yuvj420p(pc, bt709), 1920x1080, 20 fps, 20 tbr, 90k tbn, 20 tbc
[swscaler @ 0x160330000] deprecated pixel format used, make sure you did set range correctly
   5.69 M-V:  0.014 fd=   0 aq=    0KB vq=   97KB sq=    0B f=0/0   


  


  However, when playing the stream the a VCL player or trying to add the stream to my AWS instance of Ant media server. The stream does not go through. On ant media server there is no errors the stream connects but its just a black screen. On the VCL player I am getting the error :

  


  VLC is unable to open the MRL 'rtsp://{streamurl}'


  


  I currently have an identical camera setup the exact same way working fine. The only difference is there on different LAN's with different ISP's.

  


• bad ffmpeg performace compared to ffplay and VLC

  18 août 2021, par Abdelsalam ElTamawy

  I've been having bad performance with ffmpeg that I don't see with ffplay and VLC. I find this strange since ffplay uses ffmpeg under the hood.

  


  Simply if I stream an HEVC/h265 stream with ffmpeg and pipe it to ffplay, it would stutter and perform worse than if it played the stream directly with ffplay.

  


  What I'm trying to say is that I expect this command ffplay rtsp://stream-ip to perform the same as ffmpeg -i rtsp://stream-ip -f matroska - | ffplay - but it doesn't, ffplay plays noticeably smoother. Also, if I try to stream it with VLC, it is as smooth as ffplay.

  


  here is the log for ffplay :

  


  $ ffplay rtsp://admin:1234@192.168.1.47:554/StdCh1
ffplay version n4.4 Copyright (c) 2003-2021 the FFmpeg developers
  built with gcc 11.1.0 (GCC)
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc --enable-shared --enable-version3
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavformat    58. 76.100 / 58. 76.100
  libavdevice    58. 13.100 / 58. 13.100
  libavfilter     7.110.100 /  7.110.100
  libswscale      5.  9.100 /  5.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Input #0, rtsp, from 'rtsp://admin:1234@192.168.1.47:554/StdCh1':
  Metadata:
    title           : KNS-224C
    comment         : http80 rtsp554 a0 ba0 pt0 rc2 rv2 ua2 tk3 vs3 vd3 pc0 sc0 af0
  Duration: N/A, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: hevc (Main), yuvj420p(pc, bt709), 1920x1080, 30.30 tbr, 90k tbn, 90k tbc
  Stream #0:1: Data: none


  


  and here is the log for ffmpeg piped into ffplay :

  


  $ ffmpeg -i rtsp://admin:1234@192.168.1.47:554/StdCh1 -f matroska - | ffplay -
ffplay version n4.4ffmpeg version n4.4 Copyright (c) 2003-2021 the FFmpeg developers Copyright (c) 2000-2021 the FFmpeg developers

  built with gcc 11.1.0 (GCC)
  built with gcc 11.1.0 (GCC)
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc --enable-shared --enable-version3
  configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc --enable-shared --enable-version3
  libavutil      56. 70.100 / 56. 70.100
  libavcodec     58.134.100 / 58.134.100
  libavutil      56. 70.100 / 56. 70.100
  libavformat    58. 76.100 / 58. 76.100
  libavcodec     58.134.100 / 58.134.100
  libavdevice    58. 13.100 / 58. 13.100
  libavformat    58. 76.100 / 58. 76.100
  libavfilter     7.110.100 /  7.110.100
  libavdevice    58. 13.100 / 58. 13.100
  libswscale      5.  9.100 /  5.  9.100
  libavfilter     7.110.100 /  7.110.100
  libswresample   3.  9.100 /  3.  9.100
  libswscale      5.  9.100 /  5.  9.100
  libpostproc    55.  9.100 / 55.  9.100
  libswresample   3.  9.100 /  3.  9.100
  libpostproc    55.  9.100 / 55.  9.100
Input #0, rtsp, from 'rtsp://admin:1234@192.168.1.47:554/StdCh1':
  Metadata:
    title           : KNS-224C
    comment         : http80 rtsp554 a0 ba0 pt0 rc2 rv2 ua2 tk3 vs3 vd3 pc0 sc0 af0
  Duration: N/A, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: hevc (Main), yuvj420p(pc, bt709), 1920x1080, 30.30 tbr, 90k tbn, 90k tbc
  Stream #0:1: Data: none
Stream mapping:
  Stream #0:0 -> #0:0 (hevc (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[hevc @ 0x561e88468480] Could not find ref with POC 0
[libx264 @ 0x561e8845a480] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x561e8845a480] profile High, level 4.2, 4:2:0, 8-bit0
[libx264 @ 0x561e8845a480] 264 - core 161 r3039 544c61f - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - 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=12 lookahead_threads=2 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 'pipe:':
  Metadata:
    title           : KNS-224C
    comment         : http80 rtsp554 a0 ba0 pt0 rc2 rv2 ua2 tk3 vs3 vd3 pc0 sc0 af0
    encoder         : Lavf58.76.100
  Stream #0:0: Video: h264 (H264 / 0x34363248), yuvj420p(pc, bt709, progressive), 1920x1080, q=2-31, 30.30 fps, 1k tbn
    Metadata:
      encoder         : Lavc58.134.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
Input #0, matroska,webm, from 'pipe:': vq=    0KB sq=    0B f=0/0   /A speed=   0x
  Metadata:
    title           : KNS-224C
    COMMENT         : http80 rtsp554 a0 ba0 pt0 rc2 rv2 ua2 tk3 vs3 vd3 pc0 sc0 af0
    ENCODER         : Lavf58.76.100
  Duration: N/A, start: 0.000000, bitrate: N/A
  Stream #0:0: Video: h264 (High), yuvj420p(pc, bt709, progressive), 1920x1080, 30.30 fps, 30.30 tbr, 1k tbn, 60.61 tbc (default)
    Metadata:
      ENCODER         : Lavc58.134.100 libx264


  


  I'm wondering why is this happening ? shouldn't hardware acceleration be applied in both cases ?

  


  Beyond this I'm trying to create a video mosaic, the performance problem becomes very clear when displaying the streams together in a command like this :

  


  $ ffmpeg -i rtsp://stream1 \
-i rtsp://stream2 \
-i rtsp://stream3 \
-filter_complex "[0:v] scale=960x540 [a0];
[1:v] scale=960x540 [a1];
[2:v] scale=960x540 [a2];
[a0][a1][a2] xstack=inputs=3:layout=0_0|0_h0|w0_0[out]" \
 -map "[out]" -f matroska - | ffplay -


  


  This performs much worse than trying the same mosaic in VLC. Is there something I'm doing wrong ?

  


  I want to note that it performs perfectly fine if I independently streamed all sources with ffplay at the same time.