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  • Cannot play local RTP stream

    24 janvier 2020, par gdogg371

    I have been struggling along with this issue now for a while, but am making good progress. I now have a 4k transport stream running using the below command line arguments for VLC :

    vlc --ffmpeg-hw --avcodec-hw=any dshow:// :dshow-vdev="Video (00 Pro Capture HDMI 4K+)" :dshow-adev="Audio (2- 00 Pro Capture HDMI 4K+)" :dshow-threads=8 :dshow-aspect-ratio=16\:9 :dshow-size="3840x2160" :dshow-pixel_format=yuv444p16le :dshow-tune=film :dshow-preset=lossless :dshow-profile=main10 show-vcodec=hevc_nvenc :dshow-fps=50 :dshow-crf=0 :dshow-acodec=mp4a :dshow-stereo-mode=5 :dshow-force-surround-sound=0 :dshow-ab=128 :dshow-samplerate=44100 :no-dshow-config :live-caching=3000 --sout "#transcode{venc=ffmpeg,vcodec=mpgv,threads=8,aspect=16:9,width=3840,height=2160,fps=50,acodec=a52,ab=1500,channels=6,samplerate=48000,soverlay}:rtp{dst=239.255.0.1,port=5004,mux=ts}"

    I can access the rtp stream on the same PC as I am running the stream from with the below :

    vlc -vvv rtp://@239.255.0.1:5004

    However, if I try the same commands on a different computer, connected via Ethernet to the same network, the client VLC session just hangs. I have included the log below with the verbosity set to debug. Can anyone spot anything in here suggesting why the stream won’t play ?

    -- logger module started --
    
main debug: VLC media player - 3.0.8 Vetinari
    
main debug: Copyright © 1996-2019 the VideoLAN team
    
main debug: revision 3.0.8-0-gf350b6b5a7
    
main debug: configured with ../extras/package/win32/../../../configure  '--enable-update-check' '--enable-lua' '--enable-faad' '--enable-flac' '--enable-theora' '--enable-avcodec' '--enable-merge-ffmpeg' '--enable-dca' '--enable-mpc' '--enable-libass' '--enable-schroedinger' '--enable-realrtsp' '--enable-live555' '--enable-dvdread' '--enable-shout' '--enable-goom' '--enable-caca' '--enable-qt' '--enable-skins2' '--enable-sse' '--enable-mmx' '--enable-libcddb' '--enable-zvbi' '--disable-telx' '--enable-nls' '--host=x86_64-w64-mingw32' '--with-breakpad=https://win.crashes.videolan.org' 'host_alias=x86_64-w64-mingw32' 'PKG_CONFIG_LIBDIR=/home/jenkins/workspace/vlc-release/windows/vlc-release-win32-x64/contrib/x86_64-w64-mingw32/lib/pkgconfig'
    
main debug: using multimedia timers as clock source
    
main debug:  min period: 1 ms, max period: 1000000 ms
    
main debug: searching plug-in modules
    
main debug: loading plugins cache file D:\VLC\plugins\plugins.dat
    
main debug: recursively browsing `D:\VLC\plugins'
    
main error: stale plugins cache: modified D:\VLC\plugins\access\libaccess_concat_plugin.dll
    
main error: stale plugins cache: modified D:\VLC\plugins\access\libaccess_imem_plugin.dll
    
....
    
....
    
....
    
main error: stale plugins cache: modified D:\VLC\plugins\visualization\libgoom_plugin.dll
    
main error: stale plugins cache: modified D:\VLC\plugins\visualization\libprojectm_plugin.dll
    
main error: stale plugins cache: modified D:\VLC\plugins\visualization\libvisual_plugin.dll
    
main debug: plug-ins loaded: 494 modules
    
main debug: opening config file (C:\Users\cg371\AppData\Roaming\vlc\vlcrc)
    
main debug: looking for logger module matching "any": 2 candidates
    
file debug: opening logfile `D:\VLC\Log.txt'
    
main debug: using logger module "file"
    
main debug: translation test: code is "en_GB"
    
main debug: looking for keystore module matching "memory": 3 candidates
    
main debug: using keystore module "memory"
    
main debug: CPU has capabilities MMX MMXEXT SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 FPU 
    
main debug: Creating an input for 'Media Library'
    
main debug: Input is a meta file: disabling unneeded options
    
main debug: using timeshift granularity of 50 MiB
    
main debug: using timeshift path: C:\Users\cg371\AppData\Local\Temp
    
main debug: `file/directory:///C:/Users/cg371/AppData/Roaming/vlc/ml.xspf' gives access `file' demux `directory' path `/C:/Users/cg371/AppData/Roaming/vlc/ml.xspf'
    
main debug: creating demux: access='file' demux='directory' location='/C:/Users/cg371/AppData/Roaming/vlc/ml.xspf' file='C:\Users\cg371\AppData\Roaming\vlc\ml.xspf'
    
main debug: looking for access_demux module matching "file": 15 candidates
    
main debug: no access_demux modules matched
    
main debug: creating access: file:///C:/Users/cg371/AppData/Roaming/vlc/ml.xspf
    
main debug:  (path: C:\Users\cg371\AppData\Roaming\vlc\ml.xspf)
    
main debug: looking for access module matching "file": 26 candidates
    
main debug: using access module "filesystem"
    
main debug: looking for stream_filter module matching "prefetch,cache_read": 24 candidates
    
cache_read debug: Using stream method for AStream*
    
cache_read debug: starting pre-buffering
    
cache_read debug: received first data after 1 ms
    
cache_read debug: pre-buffering done 304 bytes in 0s - 296 KiB/s
    
main debug: using stream_filter module "cache_read"
    
main debug: looking for stream_filter module matching "any": 24 candidates
    
playlist debug: using XSPF playlist reader
    
main debug: using stream_filter module "playlist"
    
main debug: stream filter added to 00000266f6927700
    
main debug: looking for stream_filter module matching "any": 24 candidates
    
main debug: no stream_filter modules matched
    
main debug: looking for stream_directory module matching "any": 1 candidates
    
main debug: no stream_directory modules matched
    
main debug: attachment of directory-extractor failed for file:///C:/Users/cg371/AppData/Roaming/vlc/ml.xspf
    
main debug: looking for stream_filter module matching "record": 24 candidates
    
main debug: using stream_filter module "record"
    
main debug: creating demux: access='file' demux='directory' location='/C:/Users/cg371/AppData/Roaming/vlc/ml.xspf' file='C:\Users\cg371\AppData\Roaming\vlc\ml.xspf'
    
main debug: looking for demux module matching "directory": 55 candidates
    
main debug: using demux module "directory"
    
main debug: looking for meta reader module matching "any": 2 candidates
    
lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\reader
    
lua debug: Trying Lua scripts in D:\VLC\lua\meta\reader
    
lua debug: Trying Lua playlist script D:\VLC\lua\meta\reader\filename.luac
    
main debug: no meta reader modules matched
    
main debug: `file/directory:///C:/Users/cg371/AppData/Roaming/vlc/ml.xspf' successfully opened
    
main debug: looking for xml reader module matching "any": 1 candidates
    
main debug: using xml reader module "xml"
    
main debug: EOF reached
    
main debug: removing module "directory"
    
main debug: removing module "record"
    
main debug: removing module "playlist"
    
main debug: removing module "cache_read"
    
main debug: removing module "filesystem"
    
main debug: creating audio output
    
main debug: looking for audio output module matching "any": 6 candidates
    
mmdevice debug: using default device
    
mmdevice debug: display name changed: VLC media player (LibVLC 3.0.8)
    
mmdevice debug: version 2 session control unavailable
    
mmdevice debug: volume from -65.250000 dB to +0.000000 dB with 0.031250 dB increments
    
main debug: using audio output module "mmdevice"
    
main debug: keeping audio output
    
main debug: looking for interface module matching "hotkeys,none": 16 candidates
    
main debug: using interface module "hotkeys"
    
main debug: looking for interface module matching "globalhotkeys,none": 16 candidates
    
main debug: using interface module "win32"
    
main: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.
    
main debug: looking for interface module matching "any": 16 candidates
    
main debug: looking for extension module matching "any": 1 candidates
    
lua debug: Opening Lua Extension module
    
lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\extensions
    
lua debug: Trying Lua scripts in D:\VLC\lua\extensions
    
lua debug: Trying Lua playlist script D:\VLC\lua\extensions\VLSub.luac
    
lua debug: Scanning Lua script D:\VLC\lua\extensions\VLSub.luac
    
lua debug: Script D:\VLC\lua\extensions\VLSub.luac has the following capability flags: 0x5
    
main debug: using extension module "lua"
    
main debug: using interface module "qt"
    
main debug: processing request item: null, node: Playlist, skip: 0
    
main debug: rebuilding array of current - root Playlist
    
main debug: rebuild done - 1 items, index -1
    
main debug: starting playback of new item
    
main debug: resyncing on rtp://239.255.0.1:5004
    
main debug: rtp://239.255.0.1:5004 is at 0
    
main debug: creating new input thread
    
main debug: Creating an input for 'rtp://239.255.0.1:5004'
    
main debug: requesting art for new input thread
    
main debug: using timeshift granularity of 50 MiB
    
main debug: using timeshift path: C:\Users\cg371\AppData\Local\Temp
    
main debug: `rtp://@239.255.0.1:5004' gives access `rtp' demux `any' path `@239.255.0.1:5004'
    
main debug: creating demux: access='rtp' demux='any' location='@239.255.0.1:5004' file='\\@239.255.0.1:5004'
    
main debug: looking for access_demux module matching "rtp": 15 candidates
    
main debug: net: opening 239.255.0.1 datagram port 5004
    
qt debug: IM: Setting an input
    
main debug: looking for meta fetcher module matching "any": 1 candidates
    
lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\fetcher
    
lua debug: Trying Lua scripts in D:\VLC\lua\meta\fetcher
    
main debug: no meta fetcher modules matched
    
main debug: looking for art finder module matching "any": 2 candidates
    
lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\art
    
lua debug: Trying Lua scripts in D:\VLC\lua\meta\art
    
lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\00_musicbrainz.luac
    
lua debug: skipping script (unmatched scope) D:\VLC\lua\meta\art\00_musicbrainz.luac
    
lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\01_googleimage.luac
    
lua debug: skipping script (unmatched scope) D:\VLC\lua\meta\art\01_googleimage.luac
    
lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\02_frenchtv.luac
    
lua debug: skipping script (unmatched scope) D:\VLC\lua\meta\art\02_frenchtv.luac
    
lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\03_lastfm.luac
    
main debug: using access_demux module "rtp"
    
main debug: looking for meta reader module matching "any": 2 candidates
    
lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\reader
    
lua debug: Trying Lua scripts in D:\VLC\lua\meta\reader
    
lua debug: Trying Lua playlist script D:\VLC\lua\meta\reader\filename.luac
    
lua debug: skipping script (unmatched scope) D:\VLC\lua\meta\art\03_lastfm.luac
    
main debug: no art finder modules matched
    
main debug: no meta reader modules matched
    
main debug: `rtp://@239.255.0.1:5004' successfully opened
    
main debug: looking for meta fetcher module matching "any": 1 candidates
    
lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\fetcher
    
lua debug: Trying Lua scripts in D:\VLC\lua\meta\fetcher
    
main debug: no meta fetcher modules matched
    
main debug: looking for art finder module matching "any": 2 candidates
    
lua debug: Trying Lua scripts in C:\Users\cg371\AppData\Roaming\vlc\lua\meta\art
    
lua debug: Trying Lua scripts in D:\VLC\lua\meta\art
    
lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\00_musicbrainz.luac
    
lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\01_googleimage.luac
    
lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\02_frenchtv.luac
    
lua debug: Trying Lua playlist script D:\VLC\lua\meta\art\03_lastfm.luac
    
main debug: no art finder modules matched
    
main debug: exiting
    
main debug: exiting
    
main debug: no exit handler
    
main debug: removing all interfaces
    
main debug: removing module "qt"
    
main debug: deactivating the playlist
    
main debug: incoming request - stopping current input
    
main debug: removing module "rtp"
    
main debug: dead input
    
main debug: nothing to play
    
main debug: removing module "mmdevice"
    
qt debug: requesting exit...
    
qt debug: waiting for UI thread...
    
qt debug: IM: Deleting the input
    
qt debug: QApp exec() finished
    
qt debug: Video is not needed anymore
    
qt debug: Killing extension dialog provider
    
qt debug: ExtensionsDialogProvider is quitting...
    
main debug: removing module "lua"
    
main debug: removing module "win32"
    
main debug: removing module "hotkeys"
    
main debug: destroying
    
main debug: saving media library to file C:\Users\cg371\AppData\Roaming\vlc\ml.xspf.tmp14968
    
main debug: looking for playlist export module matching "export-xspf": 4 candidates
    
main debug: using playlist export module "export"
    
main debug: removing module "export"
    
main debug: deleting item `Media Library'
    
main debug: deleting item `rtp://239.255.0.1:5004'
    
main debug: deleting item `Playlist'
    
main debug: removing module "memory"
    
-- logger module stopped --

  • CRF/CQP is incompatible with 2pass. FFmpeg error

    22 juillet 2020, par user12129980

    This is my command :

    



    ..\ffmpeg -y -i "D:\FFMPEG\ffmpeg-20200129-de1b2aa-win64-static\bin\test\aa_start_with_BAGAN.mp4" -c:v libx264 -preset ultrafast -maxrate 3000k -bufsize 6000k -g 50 -c:a aac -b:a 128k -ac 2 -ar 44100 -an -pass 1 -f mp4 NUL   && ..\ffmpeg -i "D:\FFMPEG\ffmpeg-20200129-de1b2aa-win64-static\bin\test\aa_start_with_BAGAN.mp4" -c:v libx264 -s 1280x720 -preset ultrafast -maxrate 500k -bufsize 1000k -vf "scale=1280:-1,format=yuv420p" -g 50 -c:a aac -b:a 128k -ac 2 -ar 44100 -an -pass 2 aa_start_with_BAGAN.mp4_ultrafast_500.mp4


    



    in the output I get CRF/CQP is incompatible with 2pass, but I didnt use the cfr/-q option in the command at all, why do I get this error ?
Add the full metadata of FFMpeg maybe someone can help me with this ?
(-g 50 because the default fps is 25 base on the documentation)

    



    `ffmpeg version git-2020-01-29-de1b2aa Copyright (c) 2000-2020 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-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 38.100 / 56. 38.100
  libavcodec     58. 67.100 / 58. 67.100
  libavformat    58. 36.100 / 58. 36.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 71.100 /  7. 71.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\FFMPEG\ffmpeg-20200129-de1b2aa-win64-static\bin\test\aa_start_with_BAGAN.mp4':
  Metadata:
    major_brand     : M4V
    minor_version   : 1
    compatible_brands: M4V mp42isom
    creation_time   : 2018-04-24T18:21:09.000000Z
  Duration: 00:35:54.00, start: 0.000000, bitrate: 1057 kb/s
    Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv), 640x480 [SAR 1:1 DAR 4:3], 929 kb/s, 25 fps, 25 tbr, 50k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2018-04-24T18:21:09.000000Z
      handler_name    : Mainconcept MP4 Video Media Handler
      encoder         : AVC Coding
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      creation_time   : 2018-04-24T18:21:09.000000Z
      handler_name    : Mainconcept MP4 Sound Media Handler
Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (NUL) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0000024ec2de0f80] using SAR=1/1
[libx264 @ 0000024ec2de0f80] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000024ec2de0f80] profile Constrained Baseline, level 3.0, 4:2:0, 8-bit
[libx264 @ 0000024ec2de0f80] 264 - core 159 - H.264/MPEG-4 AVC codec - Copyleft 2003-2019 - 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=0 threads=12 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=50 keyint_min=5 scenecut=0 intra_refresh=0 rc_lookahead=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=3000 vbv_bufsize=6000 crf_max=0.0 nal_hrd=none filler=0 ip_ratio=1.40 aq=0
Output #0, mp4, to 'NUL':
  Metadata:
    major_brand     : M4V
    minor_version   : 1
    compatible_brands: M4V mp42isom
    encoder         : Lavf58.36.100
    Stream #0:0(eng): Video: h264 (libx264) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    Metadata:
      creation_time   : 2018-04-24T18:21:09.000000Z
      handler_name    : Mainconcept MP4 Video Media Handler
      encoder         : Lavc58.67.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 3000000/0/0 buffer size: 6000000 vbv_delay: N/A
frame=53849 fps=999 q=-1.0 Lsize=  496489kB time=00:35:53.92 bitrate=1888.3kbits/s speed=39.9x
video:496266kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.044919%
[libx264 @ 0000024ec2de0f80] frame I:1077  Avg QP:20.39  size: 38800
[libx264 @ 0000024ec2de0f80] frame P:52772 Avg QP:23.39  size:  8838
[libx264 @ 0000024ec2de0f80] mb I  I16..4: 100.0%  0.0%  0.0%
[libx264 @ 0000024ec2de0f80] mb P  I16..4:  8.4%  0.0%  0.0%  P16..4: 51.8%  0.0%  0.0%  0.0%  0.0%    skip:39.8%
[libx264 @ 0000024ec2de0f80] coded y,uvDC,uvAC intra: 44.8% 54.5% 18.3% inter: 30.2% 22.0% 2.0%
[libx264 @ 0000024ec2de0f80] i16 v,h,dc,p: 39% 25% 16% 19%
[libx264 @ 0000024ec2de0f80] i8c dc,h,v,p: 35% 23% 24% 17%
[libx264 @ 0000024ec2de0f80] kb/s:1887.41
ffmpeg version git-2020-01-29-de1b2aa Copyright (c) 2000-2020 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-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 38.100 / 56. 38.100
  libavcodec     58. 67.100 / 58. 67.100
  libavformat    58. 36.100 / 58. 36.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 71.100 /  7. 71.100
  libswscale      5.  6.100 /  5.  6.100
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'D:\FFMPEG\ffmpeg-20200129-de1b2aa-win64-static\bin\test\aa_start_with_BAGAN.mp4':
  Metadata:
    major_brand     : M4V
    minor_version   : 1
    compatible_brands: M4V mp42isom
    creation_time   : 2018-04-24T18:21:09.000000Z
  Duration: 00:35:54.00, start: 0.000000, bitrate: 1057 kb/s
    Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p(tv), 640x480 [SAR 1:1 DAR 4:3], 929 kb/s, 25 fps, 25 tbr, 50k tbn, 50 tbc (default)
    Metadata:
      creation_time   : 2018-04-24T18:21:09.000000Z
      handler_name    : Mainconcept MP4 Video Media Handler
      encoder         : AVC Coding
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 125 kb/s (default)
    Metadata:
      creation_time   : 2018-04-24T18:21:09.000000Z
      handler_name    : Mainconcept MP4 Sound Media Handler
Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (aa_start_with_BAGAN.mp4_ultrafast_500.mp4) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of some encoder which was not actually used for any stream.
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Press [q] to stop, [?] for help
[libx264 @ 0000013691fbda00] using SAR=3/4
[libx264 @ 0000013691fbda00] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0000013691fbda00] CRF/CQP is incompatible with 2pass.
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
Conversion failed!`


    


  • tile option in FFMPEG command result to black screenshot

    4 mars 2020, par sammax

    I am managing to create a screenshot using ffmpeg engine and it works fine when I am try to output one individual image

    ffmpeg -ss 01:05 -i input.mp4 -an -dn -sn -r 1 -vframes 1 -y -qscale 3 -vf "scale=width:high"

    But when I try to create a multi-image (Thumbnail grid sheets) using tile option the output screenshot is empty black

    ffmpeg -ss 01:05 -i input.mp4 -an -dn -sn -r 1 -vframes 1 -y -qscale 3 -vf "select=not(mod(n\,3000)),scale=320:240,tile=4x3"

    and here is what I want to achieve image

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