[FFmpeg-trac] #8774(ffmpeg:new): "Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)" error message

[FFmpeg]

#8774: "Output file is empty, nothing was encoded (check -ss / -t / -frames
parameters if used)" error message
-------------------------------------+-------------------------------------
             Reporter:               |                     Type:  defect
  Mohammed.Bey                       |
               Status:  new          |                 Priority:  important
            Component:  ffmpeg       |                  Version:  git-
             Keywords:  HEVC         |  master
  decoding, hevc_v4l2m2m, hardware   |               Blocked By:
  acceleration                       |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Hello,
 I am facing an error when trying to decode HEVC-coded content for some
 video sequences.
 I varied the video resolution as follows:
 2160p: decoded successfully
 1600p:  decoded successfully
 1080p: error
 720p: error

 When I try to decode low resolutions (720p and 1080p), ffmpeg outputs the
 following error message: "Output file is empty, nothing was encoded (check
 -ss / -t / -frames parameters if used)"

 Below are the command line and the output.
 ---------------------------------------------------------------
 root at linaro-developer:~/vary_resolution/kimono# ffmpeg -vcodec
 hevc_v4l2m2m -i AMP_D_Hisilicon_3_1080p_fps_25.265 -f null /dev/null
 ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
   built with gcc 8 (Debian 8.3.0-6)
   configuration: --enable-gpl --enable-nonfree --enable-static --disable-
 shared --enable-pthreads --enable-neon --enable-thumb --enable-
 optimizations --enable-libv4l2
   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
   libswscale      5.  7.100 /  5.  7.100
   libswresample   3.  7.100 /  3.  7.100
   libpostproc    55.  7.100 / 55.  7.100
 Input #0, hevc, from 'AMP_D_Hisilicon_3_1080p_fps_25.265':
   Duration: N/A, bitrate: N/A
     Stream #0:0: Video: hevc (Main), yuv420p(tv), 1920x1080, 25 fps, 25
 tbr, 1200k tbn, 25 tbc
 [hevc_v4l2m2m @ 0xaaaaf4f323d0] Using device /dev/video1
 [hevc_v4l2m2m @ 0xaaaaf4f323d0] driver 'qcom-venus' on card 'Qualcomm
 Venus video decoder' in mplane mode
 [hevc_v4l2m2m @ 0xaaaaf4f323d0] requesting formats: output=HEVC
 capture=NV12
 Stream mapping:
   Stream #0:0 -> #0:0 (hevc (hevc_v4l2m2m) -> wrapped_avframe (native))
 Press [q] to stop, [?] for help
 [hevc_v4l2m2m @ 0xaaaaf4f323d0] VIDIOC_G_FMT ioctl
     Last message repeated 99 times
 Output #0, null, to '/dev/null':
   Metadata:
     encoder         : Lavf58.45.100
     Stream #0:0: Video: wrapped_avframe, yuv420p, 1920x1080, q=2-31, 200
 kb/s, 25 fps, 25 tbn, 25 tbc
     Metadata:
       encoder         : Lavc58.91.100 wrapped_avframe
 frame=    0 fps=0.0 q=0.0 Lsize=N/A 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)
 ---------------------------------------------------------------

 Best regards

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8774>
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