[FFmpeg-trac] #10938(undetermined:new): h264_nvenc scaling: "Impossible to convert between the formats supported by the filter 'graph 0 input from stream 0:0' and the filter 'auto_scale_0'"

[FFmpeg]

#10938: h264_nvenc scaling: "Impossible to convert between the formats supported by
the filter 'graph 0 input from stream 0:0' and the filter 'auto_scale_0'"
-------------------------------------+-------------------------------------
             Reporter:  Geremia      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug: Cannot scale with h264_nvenc, but can convert without
 scaling just fine.
 How to reproduce:
 {{{
 % ffmpeg -i in.mp4 -vf "scale_vaapi=w=0.5*iw:h=0.5*ih" -c:v h264_nvenc
 -c:a copy scaled.mp4
 ffmpeg -i in.mp4 -vf "scale_vaapi=w=0.5*iw:h=0.5*ih" -c:v h264_nvenc -c:a
 copy scaled.mp4
 ffmpeg version 6.1.1 Copyright (c) 2000-2023 the FFmpeg developers
   built with gcc 13.2.0 (GCC)
   configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64
 --docdir=/usr/doc/ffmpeg-6.1.1/html --mandir=/usr/man --disable-debug
 --enable-shared --disable-static --enable-gpl --enable-version3
 --arch=x86_64 --disable-encoder=aac --enable-libfontconfig --enable-
 libfreetype --enable-libfribidi --enable-gnutls --enable-libass --enable-
 libbluray --enable-libcaca --enable-libcdio --enable-frei0r --enable-
 openal --enable-libopus --enable-libspeex --enable-libssh --enable-
 libtheora --enable-libv4l2 --enable-libvidstab --enable-libvorbis
 --enable-libvpx --enable-libwebp --enable-libmp3lame --enable-opencl
 --enable-opengl --enable-libopenjpeg --enable-libpulse --enable-
 libsmbclient --enable-libxml2 --enable-librsvg --enable-vulkan --enable-
 libdrm --enable-libshaderc --enable-gcrypt --enable-libplacebo --enable-
 lcms2
   libavutil      58. 29.100 / 58. 29.100
   libavcodec     60. 31.102 / 60. 31.102
   libavformat    60. 16.100 / 60. 16.100
   libavdevice    60.  3.100 / 60.  3.100
   libavfilter     9. 12.100 /  9. 12.100
   libswscale      7.  5.100 /  7.  5.100
   libswresample   4. 12.100 /  4. 12.100
   libpostproc    57.  3.100 / 57.  3.100
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x6fd340] st: 0 edit list: 1 Missing key frame
 while searching for timestamp: 1001
 [mov,mp4,m4a,3gp,3g2,mj2 @ 0x6fd340] st: 0 edit list 1 Cannot find an
 index entry before timestamp: 1001.
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'in.mp4':
   Metadata:
     major_brand     : mp42
     minor_version   : 1
     compatible_brands: mp42avc1niko
     creation_time   : 2024-03-26T01:00:14.000000Z
   Duration: 01:01:52.31, start: 0.000000, bitrate: 24334 kb/s
   Stream #0:0[0x1](und): Video: h264 (High) (avc1 / 0x31637661),
 yuvj420p(pc, bt709, progressive), 1920x1080, 24072 kb/s, 29.97 fps, 29.97
 tbr, 30k tbn (default)
     Metadata:
       creation_time   : 2024-03-26T01:00:14.000000Z
       vendor_id       : [0][0][0][0]
       encoder         : AVC Coding
   Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
 stereo, fltp, 255 kb/s (default)
     Metadata:
       creation_time   : 2024-03-26T01:00:14.000000Z
       vendor_id       : [0][0][0][0]
 File 'scaled.mp4' already exists. Overwrite? [y/N] y
 Stream mapping:
   Stream #0:0 -> #0:0 (h264 (native) -> h264 (h264_nvenc))
   Stream #0:1 -> #0:1 (copy)
 Press [q] to stop, [?] for help
 Impossible to convert between the formats supported by the filter 'graph 0
 input from stream 0:0' and the filter 'auto_scale_0'
 [vf#0:0 @ 0x6f4640] Error reinitializing filters!
 Failed to inject frame into filter network: Function not implemented
 Error while filtering: Function not implemented
 [out#0/mp4 @ 0x704380] Nothing was written into output file, because at
 least one of its streams received no packets.
 frame=    0 fps=0.0 q=0.0 Lsize=       0kB time=00:00:00.46 bitrate=
 0.0kbits/s speed=6.05x
 Conversion failed!
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10938>
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