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• ffmpeg creates empty mpd-file

  1er avril 2021, par Macster

  I'm trying to live stream a webm file using ffmpeg and Dash.js as a Player. Creating chunks with ffmpeg seems to work fine, but when want to create the manifest it says Could not find codec parameters for stream 0 (Video: vp9, none, 640x480): unspecified pixel format Consider increasing the value for the 'analyzeduration' and 'probesize' options and at the end Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used).

  


  Commands I use

  


  ffmpeg -re -r 25 -i Dash/strm.webm
 -map 0:v:0
 -pix_fmt yuv420p
 -c:v libvpx-vp9
 -s 640x480 -keyint_min 25 -g 25 
 -speed 6 -threads 8 -static-thresh 0 -max-intra-rate 300 
 -deadline realtime -lag-in-frames 0 -error-resilient 1
 -f webm_chunk 
 -header "Dash/glass_360.hdr"
 -chunk_start_index 1
 Dash\glass_360_%d.chk


  


  Manifest

  


  ffmpeg ^
 -f webm_dash_manifest -live 1
 -r 25
 -i Dash/glass_360.hdr
 -c copy
 -map 0
 -r 25
 -framerate 25
 -f webm_dash_manifest -live 1
 -adaptation_sets "id=0,streams=0"
 -chunk_start_index 1
 -chunk_duration_ms 1000
 -time_shift_buffer_depth 7200
 -minimum_update_period 7200
 Dash/glass_live_manifest.mpd


  


  Manifest Output

  


   libavutil      56. 49.100 / 56. 49.100
  libavcodec     58. 87.101 / 58. 87.101
  libavformat    58. 43.100 / 58. 43.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 83.100 /  7. 83.100
  libswscale      5.  6.101 /  5.  6.101
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[webm_dash_manifest @ 0000015f19f2ea40] Could not find codec parameters for stream 0 (Video: vp9, none, 640x480): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, webm_dash_manifest, from 'Dash/glass_360.hdr':
  Metadata:
    ENCODER         : Lavf58.43.100
  Duration: N/A, bitrate: N/A
    Stream #0:0(eng): Video: vp9, none, 640x480, SAR 1:1 DAR 4:3, 1k tbr, 1k tbn, 1k tbc (default)
    Metadata:
      ALPHA_MODE      : 1
      ENCODER         : Lavc58.87.101 libvpx-vp9
      webm_dash_manifest_file_name: glass_360.hdr
      webm_dash_manifest_track_number: 1
Output #0, webm_dash_manifest, to 'stream_manifest.mpd':
  Metadata:
    encoder         : Lavf58.43.100
    Stream #0:0(eng): Video: vp9, none, 640x480 [SAR 1:1 DAR 4:3], q=2-31, 1k tbr, 1k tbn, 1k tbc (default)
    Metadata:
      ALPHA_MODE      : 1
      ENCODER         : Lavc58.87.101 libvpx-vp9
      webm_dash_manifest_file_name: glass_360.hdr
      webm_dash_manifest_track_number: 1
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
frame=    0 fps=0.0 q=-1.0 Lsize=       1kB 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
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)


  


  glass_live_manifest.mpd

  


  &lt;?xml version="1.0" encoding="UTF-8"?>&#xA;&#xA;<period start="PT0S">&#xA;<adaptationset mimetype="video/webm" codecs="vp9" lang="eng" bitstreamswitching="true" subsegmentalignment="true" subsegmentstartswithsap="1">&#xA;<contentcomponent type="video"></contentcomponent>&#xA;<segmenttemplate timescale="1000" duration="1000" media="glass_$RepresentationID$_$Number$.chk" startnumber="1" initialization="glass_$RepresentationID$.hdr"></segmenttemplate>&#xA;<representation bandwidth="1000000" width="640" height="480" codecs="vp9" mimetype="video/webm" startswithsap="1"></representation>&#xA;</adaptationset>&#xA;</period>&#xA;&#xA;

  


  UPDATE

  


  I fixed the "warnings" by changing the comands like this :

  


  ffmpeg -re -r 25 -i Dash/strm.webm
-map 0:v:0
-pix_fmt yuv420p
-c:v libvpx
-s 640x480 -keyint_min 60 -g 60 -speed 6 -tile-columns 4 -frame-parallel 1 -threads 8 -static-thresh 0 -max-intra-rate 300 -deadline realtime -lag-in-frames 0 -error-resilient 1
-b:v 3000k
-f webm_chunk
-header "Dash/glass_360.hdr"
-chunk_start_index 1 Dash/glass_360_%d.chk
-map 0:a:0
-c:a libvorbis
-b:a 128k -ar 44100
-f webm_chunk
-audio_chunk_duration 2000
-header Dash/glass_171.hdr
-chunk_start_index 1 Dash/glass_171_%d.chk

ffmpeg
-f webm_dash_manifest -live 1
-i Dash/glass_360.hdr
-f webm_dash_manifest -live 1
-i Dash/glass_171.hdr
-c copy
-map 0 -map 1
-f webm_dash_manifest -live 1
-adaptation_sets "id=0,streams=0 id=1,streams=1"
-chunk_start_index 1
-chunk_duration_ms 2000
-time_shift_buffer_depth 7200
-minimum_update_period 7200 Dash/glass_video_manifest.mpd


  


  However, it's still not working.

  


• FFmpeg overlay PNG after scaling has not necessary black borders

  24 mars 2021, par Mikołaj Henklewski

  I have two PNG files that I want to add to the video :

  


  

  • Two lines text

  


  • Circle

  


  


  but on the final video, they have black borders (they do not have it originally !) Actual Result.. The question is why FFmpeg is adding it on scale effect, and how to avoid adding it ? Command is :

  


  ffmpeg -i 3d9678e2e58c4d08a24363468d0cfd3e.mp4 -i caption-1616544596077-d.png -i caption-1616544596080-d.png -filter_complex 
[1:v]rotate=6.178465552059927:c=none:ow=rotw(6.178465552059927):oh=roth(6.178465552059927)[1_rot];
[1_rot]scale=iw/2:ih/2[1_rot_scale];
[0:v][1_rot_scale]overlay=x=288:y=50:enable='between(t,0,3.2)':format=auto[1_out];
[2:v]rotate=0.0:c=none:ow=rotw(0.0):oh=roth(0.0)[2_rot];[2_rot]scale=iw/2:ih/2[2_rot_scale];
[1_out[2_rot_scale]overlay=x=589:y=71:enable='between(t,0,3.2)':format=auto" -preset ultrafast -crf 23 out.mp4


  


  Here is also log from ffmpeg :

  


  ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.29)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --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-librtmp --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '3d9678e2e58c4d08a24363468d0cfd3e.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.77.100
  Duration: 00:00:03.72, start: 0.000000, bitrate: 2333 kb/s
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2331 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
Input #1, png_pipe, from 'caption-1616544596077-d.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba(pc), 1382x884, 25 tbr, 25 tbn, 25 tbc
Input #2, png_pipe, from 'caption-1616544596080-d.png':
  Duration: N/A, bitrate: N/A
    Stream #2:0: Video: png, rgba(pc), 612x612, 25 tbr, 25 tbn, 25 tbc
File 'out.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 (h264) -> overlay:main
  Stream #1:0 (png) -> rotate
  Stream #2:0 (png) -> rotate
  overlay -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[libx264 @ 0x7f8999025c00] using SAR=1/1
[libx264 @ 0x7f8999025c00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7f8999025c00] profile High 4:4:4 Predictive, level 3.1, 4:4:4, 8-bit
[libx264 @ 0x7f8999025c00] 264 - core 161 r3048 b86ae3c - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=6 threads=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to 'out.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=   93 fps=0.0 q=-1.0 Lsize=     967kB time=00:00:03.68 bitrate=2152.5kbits/s speed=8.66x
video:966kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.122451%
[libx264 @ 0x7f8999025c00] frame I:1     Avg QP:20.00  size: 85204
[libx264 @ 0x7f8999025c00] frame P:92    Avg QP:18.23  size:  9817
[libx264 @ 0x7f8999025c00] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0x7f8999025c00] mb P  I16..4:  1.7%  0.0%  0.0%  P16..4: 19.9%  0.0%  0.0%  0.0%  0.0%    skip:78.4%
[libx264 @ 0x7f8999025c00] coded y,u,v intra: 33.6% 3.0% 4.9% inter: 8.6% 0.9% 0.8%
[libx264 @ 0x7f8999025c00] i16 v,h,dc,p: 30% 33% 18% 18%
[libx264 @ 0x7f8999025c00] kb/s:2125.53


  


• FFmpeg overlay PNG has not necessary black borders

  24 mars 2021, par Mikołaj Henklewski

  I have a few PNG files that I want to add to the video :

  


  

  • Two lines text

  


  • Circle

  


  • Red letters

  


  • White letters

  


  


  but on the final video, some of them have black borders (they do not have it originally !) Actual Result.. The question is why FFmpeg is adding it, and how to avoid adding it ? Command is :

  


  ffmpeg -i 3d9678e2e58c4d08a24363468d0cfd3e.mp4 -i caption-1616544596077.png -i caption-1616544596080.png -i caption-1616544597262.png -i caption-1616544598027.png -filter_complex "[1:v]format=rgba,colorchannelmixer=aa=1[1_alpha];
[1_alpha]setpts=1.0*PTS[1_alpha_speed];  [1_alpha_speed]rotate=6.178465552059927:c=none:ow=rotw(6.178465552059927):oh=roth(6.178465552059927)[1_alpha_speed_rot];
[1_alpha_speed_rot]scale=iw/2:ih/2[1_alpha_speed_rot_scale];
[0:v][1_alpha_speed_rot_scale]overlay=x=288:y=50:enable='between(t,0,3.2)':format=rgb[1_out];
[2:v]format=rgba,colorchannelmixer=aa=1[2_alpha];
[2_alpha]setpts=1.0*PTS[2_alpha_speed];
[2_alpha_speed]rotate=0.0:c=none:ow=rotw(0.0):oh=roth(0.0)[2_alpha_speed_rot];
[2_alpha_speed_rot]scale=iw/2:ih/2[2_alpha_speed_rot_scale];
[1_out][2_alpha_speed_rot_scale]overlay=x=589:y=71:enable='between(t,0,3.2)':format=rgb[2_out];
[3:v]format=rgba,colorchannelmixer=aa=1[3_alpha];
[3_alpha]setpts=1.0*PTS[3_alpha_speed]; [3_alpha_speed]rotate=6.178465552059927:c=none:ow=rotw(6.178465552059927):oh=roth(6.178465552059927)[3_alpha_speed_rot];
[3_alpha_speed_rot]scale=iw/2:ih/2[3_alpha_speed_rot_scale];
[2_out][3_alpha_speed_rot_scale]overlay=x=409:y=104:enable='between(t,0,3.2)':format=rgb[3_out];
[4:v]format=rgba,colorchannelmixer=aa=1[4_alpha];
[4_alpha]setpts=1.0*PTS[4_alpha_speed];
[4_alpha_speed]rotate=0.0:c=none:ow=rotw(0.0):oh=roth(0.0)[4_alpha_speed_rot];
[4_alpha_speed_rot]scale=iw/2:ih/2[4_alpha_speed_rot_scale];
[3_out][4_alpha_speed_rot_scale]overlay=x=593:y=337:enable='between(t,0,3.2)':format=rgb" -preset ultrafast -crf 23 d4d85756d7b54735b95720f9280bf6e2.mp4


  


  Here is also log from ffmpeg :

  


  ffmpeg version 4.3.2 Copyright (c) 2000-2021 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.29)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.2_1 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --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-librtmp --enable-libspeex --enable-libsoxr --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack --enable-videotoolbox
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '3d9678e2e58c4d08a24363468d0cfd3e.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.77.100
  Duration: 00:00:03.72, start: 0.000000, bitrate: 2333 kb/s
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 2331 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
    Metadata:
      handler_name    : VideoHandler
Input #1, png_pipe, from 'caption-1616544596077.png':
  Duration: N/A, bitrate: N/A
    Stream #1:0: Video: png, rgba(pc), 1382x884, 25 tbr, 25 tbn, 25 tbc
Input #2, png_pipe, from 'caption-1616544596080.png':
  Duration: N/A, bitrate: N/A
    Stream #2:0: Video: png, rgba(pc), 612x612, 25 tbr, 25 tbn, 25 tbc
Input #3, png_pipe, from 'caption-1616544597262.png':
  Duration: N/A, bitrate: N/A
    Stream #3:0: Video: png, rgba(pc), 720x266, 25 tbr, 25 tbn, 25 tbc
Input #4, png_pipe, from 'caption-1616544598027.png':
  Duration: N/A, bitrate: N/A
    Stream #4:0: Video: png, rgba(pc), 304x170, 25 tbr, 25 tbn, 25 tbc
File 'd4d85756d7b54735b95720f9280bf6e2.mp4' already exists. Overwrite? [y/N] y
Stream mapping:
  Stream #0:0 (h264) -> overlay:main
  Stream #1:0 (png) -> format
  Stream #2:0 (png) -> format
  Stream #3:0 (png) -> format
  Stream #4:0 (png) -> format
  overlay -> Stream #0:0 (libx264)
Press [q] to stop, [?] for help
[libx264 @ 0x7fb2c7015a00] using SAR=1/1
[libx264 @ 0x7fb2c7015a00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x7fb2c7015a00] profile High 4:4:4 Predictive, level 3.1, 4:4:4, 8-bit
[libx264 @ 0x7fb2c7015a00] 264 - core 161 r3048 b86ae3c - H.264/MPEG-4 AVC codec - Copyleft 2003-2021 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=6 threads=18 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
Output #0, mp4, to 'd4d85756d7b54735b95720f9280bf6e2.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.45.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv444p, 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      encoder         : Lavc58.91.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame=   17 fps=0.0 q=0.0 size=       0kB time=00:00:00.00 bitrate=N/A speed=   frame=   93 fps=0.0 q=-1.0 Lsize=     972kB time=00:00:03.68 bitrate=2164.1kbits/s speed=4.01x
video:971kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.121794%
[libx264 @ 0x7fb2c7015a00] frame I:1     Avg QP:20.00  size: 90127
[libx264 @ 0x7fb2c7015a00] frame P:92    Avg QP:18.23  size:  9821
[libx264 @ 0x7fb2c7015a00] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0x7fb2c7015a00] mb P  I16..4:  1.7%  0.0%  0.0%  P16..4: 19.9%  0.0%  0.0%  0.0%  0.0%    skip:78.4%
[libx264 @ 0x7fb2c7015a00] coded y,u,v intra: 33.9% 3.1% 5.2% inter: 8.6% 0.9% 0.8%
[libx264 @ 0x7fb2c7015a00] i16 v,h,dc,p: 29% 34% 19% 18%
[libx264 @ 0x7fb2c7015a00] kb/s:2136.99