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• h.265 encoding with ffmpeg, video not playing correctly

  5 mars 2020, par DanielRieken

  I got a h.264 video I would like to encode to h.265 using FFmpeg :

  ffmpeg.exe -i h264source.mkv -vcodec libx265 -preset slower -threads 0 -crf 24 -an h265output.mkv

  The source h.264 video is a recording of a RTMP-stream. At some point the video stops moving for 3 seconds. This is because of connection-issues of the original RTMP-stream.
  Of course the resulting h.265 video also stops moving for 3 seconds at the same point. But other than the h.264 video, the picture of the h.265 video is not frozen for only 3 seconds, it is frozen until the end of the video.

  I am using VLCplayer 3.0.8 for playback and it shows the following messages for the h.265 video :

  avcodec: Using D3D11VA (NVIDIA GeForce GT 1030, vendor 10de(NVIDIA), device 1d01, revision a1) for hardware decoding
  
  avcodec error: hardware acceleration picture allocation failed
  
  avcodec error: hardware acceleration picture allocation failed
  
  avcodec error: hardware acceleration picture allocation failed
  
  avcodec error: avcodec_send_packet critical error

  When I disable hardware acceleration in VLCplayer the playback of the h.265 video works fine.

  Next I encoded the h.264 to h.265 using HandBrake 1.3.0 and the resulting h.265 video also works fine in VLCplayer with hardware acceleration enabled.

  So my question is :
  Why is the playback of the h.264 and the h.265-handbrake-videos working fine in VLCplayer but not the h.265-ffmpeg video ?

  When I encode the h.264 to huffyuv and then to h.265 using FFmpeg, the resulting h.265-video also works fine :

  ffmpeg.exe -i h264source.mkv -vcodec huffyuv -an huffyuv.mkv
  
  ffmpeg.exe -i huffyuv.mkv -vcodec libx265 -preset slower -threads 0 -crf 24 -an h265output.mkv

  I am using the windows build by Zeranoe, ffmpeg-4.2.2-win64-static.

  Any advices ?

  edit :

  C:\ffmpeg>ffmpeg.exe -loglevel verbose -i h264source.mkv -vcodec libx265 -preset slower -threads 0 -crf 24 -an h265output.mkv
  
  ffmpeg version 4.2.2 Copyright (c) 2000-2019 the FFmpeg developers
  
    built with gcc 9.2.1 (GCC) 20200122
  
    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. 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
  
    libswscale      5.  5.100 /  5.  5.100
  
    libswresample   3.  5.100 /  3.  5.100
  
    libpostproc    55.  5.100 / 55.  5.100
  
  [h264 @ 000001e8dc09d6c0] Reinit context to 864x480, pix_fmt: yuv420p
  
  Input #0, matroska,webm, from 'h264source.mkv':
  
    Metadata:
  
      COMPATIBLE_BRANDS: isomiso2avc1mp41
  
      MAJOR_BRAND     : isom
  
      MINOR_VERSION   : 512
  
      ENCODER         : Lavf58.29.100
  
    Duration: 00:01:55.67, start: 0.000000, bitrate: 958 kb/s
  
      Stream #0:0: Video: h264 (Constrained Baseline), 1 reference frame, yuv420p(progressive, left), 852x480 (864x480) [SAR 1:1 DAR 71:40], 30 fps, 30 tbr, 1k tbn, 60 tbc (default)
  
      Metadata:
  
        ENCODER         : Lavc58.54.100 libx264
  
        DURATION        : 00:01:55.666000000
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
  
  Press [q] to stop, [?] for help
  
  [h264 @ 000001e8dc77b080] Reinit context to 864x480, pix_fmt: yuv420p
  
  [graph 0 input from stream 0:0 @ 000001e8dd38ee40] w:852 h:480 pixfmt:yuv420p tb:1/1000 fr:30/1 sar:1/1 sws_param:flags=2
  
  x265 [info]: HEVC encoder version 3.2ßacc5d16999e2
  
  x265 [info]: build info [Windows][GCC 9.2.1][64 bit] 8bit+10bit
  
  x265 [info]: using cpu capabilities: MMX2 SSE2Fast LZCNT SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
  
  x265 [info]: Main profile, Level-3 (Main tier)
  
  x265 [info]: Thread pool created using 16 threads
  
  x265 [info]: Slices                              : 1
  
  x265 [info]: frame threads / pool features       : 4 / wpp(8 rows)
  
  x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
  
  x265 [info]: Residual QT: max TU size, max depth : 32 / 3 inter / 3 intra
  
  x265 [info]: ME / range / subpel / merge         : star / 57 / 4 / 4
  
  x265 [info]: Keyframe min / max / scenecut / bias  : 25 / 250 / 40 / 5.00
  
  x265 [info]: Lookahead / bframes / badapt        : 40 / 8 / 2
  
  x265 [info]: b-pyramid / weightp / weightb       : 1 / 1 / 1
  
  x265 [info]: References / ref-limit  cu / depth  : 5 / off / on
  
  x265 [info]: AQ: mode / str / qg-size / cu-tree  : 2 / 1.0 / 32 / 1
  
  x265 [info]: Rate Control / qCompress            : CRF-24.0 / 0.60
  
  x265 [info]: tools: rect amp limit-modes rd=6 psy-rd=2.00 rdoq=2 psy-rdoq=1.00
  
  x265 [info]: tools: rskip limit-tu=4 signhide tmvp b-intra
  
  x265 [info]: tools: strong-intra-smoothing deblock sao
  
  Output #0, matroska, to 'h265output.mkv':
  
    Metadata:
  
      COMPATIBLE_BRANDS: isomiso2avc1mp41
  
      MAJOR_BRAND     : isom
  
      MINOR_VERSION   : 512
  
      encoder         : Lavf58.29.100
  
      Stream #0:0: Video: hevc (libx265), 1 reference frame, yuv420p(left), 852x480 [SAR 1:1 DAR 71:40], q=2-31, 30 fps, 1k tbn, 30 tbc (default)
  
      Metadata:
  
        DURATION        : 00:01:55.666000000
  
        encoder         : Lavc58.54.100 libx265
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
  
  No more output streams to write to, finishing
  
  frame= 3178 fps= 14 q=-0.0 Lsize=    5105kB time=00:01:55.56 bitrate= 361.9kbits/s speed=0.506x
  
  video:5080kB audio:0kB subtitle:0kB other streams:0kB global headers:2kB muxing overhead: 0.492293%
  
  Input file #0 (h264source.mkv):
  
    Input stream #0:0 (video): 3178 packets read (13837009 bytes); 3178 frames decoded;
  
    Total: 3178 packets (13837009 bytes) demuxed
  
  Output file #0 (h265output.mkv):
  
    Output stream #0:0 (video): 3178 frames encoded; 3178 packets muxed (5201780 bytes);
  
    Total: 3178 packets (5201780 bytes) muxed
  
  [AVIOContext @ 000001e8dc77af40] Statistics: 8 seeks, 40 writeouts
  
  x265 [info]: frame I:     13, Avg QP:18.10  kb/s: 6779.10
  
  x265 [info]: frame P:   1754, Avg QP:22.52  kb/s: 619.00
  
  x265 [info]: frame B:   1411, Avg QP:31.19  kb/s: 50.69
  
  x265 [info]: Weighted P-Frames: Y:0.0% UV:0.0%
  
  x265 [info]: Weighted B-Frames: Y:0.0% UV:0.0%
  
  x265 [info]: consecutive B-frames: 67.4% 8.3% 8.6% 10.9% 2.7% 2.0% 0.2% 0.0% 0.0%
  
  
  
  encoded 3178 frames in 228.50s (13.91 fps), 391.87 kb/s, Avg QP:26.35
  
  [AVIOContext @ 000001e8dc0936c0] Statistics: 13860805 bytes read, 0 seeks

• How can I capture real time command line output of x265.exe with Python ?

  29 février 2020, par LeeRoermond

  I would like to write a GUI for x265.exe which presents a better (more humanized) real time progress .

  Here’s the code I used to capture subprocess’s output :

  import subprocess
  
  
  
  cmd = r'ping www.baidu.com -n 4'
  
  popen = subprocess.Popen(cmd, stdout = subprocess.PIPE ,stderr=subprocess.STDOUT ,shell=True)
  
  while True:
  
      next_line = popen.stdout.readline()
  
      if next_line == b'' and popen.poll() != None:
  
          break
  
      else:
  
          print(next_line.decode('ascii').replace('\r\n','\n') , end='')

  It performs perfectly with ’ping’.

  However ,when I swiched to ’x265’ command ,thing goes to wired.

  For example, If I replaced string variable 'cmd' into "x265 --y4m --crf 21 --output output.hevc input.y4m" in the preceding code.Theoretically , it should gives out the following output in lines arranged in order of time :

  y4m  [info]: 1920x1080 fps 24000/1001 i420p10 frames 0 - 100 of 101
  
  x265 [info]: Using preset ultrafast & tune none
  
  raw  [info]: output file: C:\temp\output.hevc
  
  x265 [info]: Main 10 profile, Level-4 (Main tier)
  
  x265 [info]: Thread pool created using 16 threads
  
  x265 [info]: Slices                              : 1
  
  x265 [info]: frame threads / pool features       : 4 / wpp(34 rows)
  
  x265 [info]: Coding QT: max CU size, min CU size : 32 / 16
  
  x265 [info]: Residual QT: max TU size, max depth : 32 / 1 inter / 1 intra
  
  x265 [info]: ME / range / subpel / merge         : dia / 57 / 0 / 2
  
  x265 [info]: Keyframe min / max / scenecut / bias: 23 / 250 / 0 / 5.00
  
  x265 [info]: Lookahead / bframes / badapt        : 5 / 3 / 0
  
  x265 [info]: AQ: mode / str / qg-size / cu-tree  : 1 / 0.0 / 32 / 1
  
  x265 [info]: Rate Control / qCompress            : CRF-21.0 / 0.60
  
  x265 [info]: tools: strong-intra-smoothing lslices=6 deblock
  
  
  
  [1.0%] 1/101 frames, 6.289 fps, 7217.8 kb/s
  
  [25.7%] 26/101 frames, 59.23 fps, 299.23 kb/s
  
  [45.5%] 46/101 frames, 66.76 fps, 322.81 kb/s  
  
  [69.3%] 70/101 frames, 73.30 fps, 224.53 kb/s
  
  [93.1%] 94/101 frames, 77.05 fps, 173.67 kb/s   
  
  
  
  x265 [info]: frame I:      1, Avg QP:23.45  kb/s: 7098.44 
  
  x265 [info]: frame P:     25, Avg QP:25.71  kb/s: 311.24  
  
  x265 [info]: frame B:     75, Avg QP:28.33  kb/s: 23.89   
  
  x265 [info]: consecutive B-frames: 3.8% 0.0% 0.0% 96.2% 
  
  
  
  encoded 101 frames in 1.22s (82.58 fps), 165.06 kb/s, Avg QP:27.64

  But the truth is, those output block in the middle part which indicates the real time progress will not be captured every specific it updated . popen.stdout.readline() command will be blocked until progress goes to 100% and then output altogether. Obviously that’s not what I want.

  ( ↓ I mean by this part)

  [1.0%] 1/101 frames, 6.289 fps, 7217.8 kb/s
  
  [25.7%] 26/101 frames, 59.23 fps, 299.23 kb/s
  
  [45.5%] 46/101 frames, 66.76 fps, 322.81 kb/s  
  
  [69.3%] 70/101 frames, 73.30 fps, 224.53 kb/s
  
  [93.1%] 94/101 frames, 77.05 fps, 173.67 kb/s   

  Could anyone help me fiture out what’s going on and how to fix it to achieve my goal ?

  Thanks a lot.

• "Pixel format 'yuvj420p' is not supported" when converting image to video using CUDA hardware acceleration

  11 février 2020, par laurent

  I’m trying to convert an image to a video using CUDA hardware acceleration but I can’t get it to work.

  The basic command I have is this one :

  ffmpeg -y -hwaccel cuvid -i tests/MediaSamples/portrait_0.jpg -t 10 out.mp4

  And I’m getting this error :

  [AVHWFramesContext @ 0x32d3f00] Pixel format 'yuvj420p' is not supported
  
  [mjpeg @ 0x2d18480] Error initializing a CUDA frame pool
  
  cuvid hwaccel requested for input stream #0:0, but cannot be initialized.
  
  Error while decoding stream #0:0: Invalid argument

  I’ve tried setting the pixel format like so, but that didn’t help :

  ffmpeg -y -hwaccel cuvid -pix_fmt yuv420p -i tests/MediaSamples/portrait_0.jpg -t 10 out.mp4

  I’ve also tried many other flags but can’t get anything to work. Any idea what the issue might be ?

  For information this is the full log :

  ffmpeg version N-96615-gc35382a Copyright (c) 2000-2020 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.12) 20160609
  
    configuration: --enable-nonfree --disable-shared --enable-gpl --enable-openssl --enable-libx264 --enable-cuda-sdk --enable-nvenc --enable-cuda --enable-cuvid --enable-libnpp --extra-cflags='-I/usr/local/ssl/include -I/usr/local/cuda/include -I/usr/local/include -L/usr/local/ssl/lib -Wl,-rpath=/usr/local/ssl/lib' --extra-ldflags=-L/usr/local/cuda/lib64
  
    libavutil      56. 38.100 / 56. 38.100
  
    libavcodec     58. 67.101 / 58. 67.101
  
    libavformat    58. 37.100 / 58. 37.100
  
    libavdevice    58.  9.103 / 58.  9.103
  
    libavfilter     7. 73.100 /  7. 73.100
  
    libswscale      5.  6.100 /  5.  6.100
  
    libswresample   3.  6.100 /  3.  6.100
  
    libpostproc    55.  6.100 / 55.  6.100
  
  Input #0, image2, from 'tests/MediaSamples/portrait_0.jpg':
  
    Duration: 00:00:00.04, start: 0.000000, bitrate: 40237 kb/s
  
      Stream #0:0: Video: mjpeg (Progressive), yuvj420p(pc, bt470bg/unknown/unknown), 1600x900 [SAR 72:72 DAR 16:9], 25 tbr, 25 tbn, 25 tbc
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (mjpeg (native) -> h264 (libx264))
  
  Press [q] to stop, [?] for help
  
  [AVHWFramesContext @ 0x32d3f00] Pixel format 'yuvj420p' is not supported
  
  [mjpeg @ 0x2d18480] Error initializing a CUDA frame pool
  
  cuvid hwaccel requested for input stream #0:0, but cannot be initialized.
  
  Error while decoding stream #0:0: Invalid argument
  
  [libx264 @ 0x2d1e840] using SAR=1/1
  
  [libx264 @ 0x2d1e840] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
  
  [libx264 @ 0x2d1e840] profile High, level 4.0
  
  [libx264 @ 0x2d1e840] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - 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=24 lookahead_threads=4 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, mp4, to 'out.mp4':
  
    Metadata:
  
      encoder         : Lavf58.37.100
  
      Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuvj420p(pc), 1600x900 [SAR 72:72 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc
  
      Metadata:
  
        encoder         : Lavc58.67.101 libx264
  
      Side data:
  
        cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
  
  frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.00 bitrate=N/A speed=   0x
  
  video:0kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
  
  Conversion failed!