Hello FFmpeg community,

Recently, I faced transcoding issues with fully hardware nvdec/nvenc scheme. Particularly, my FFmpeg feed fails with the following error after 30-60 minutes of live transcoding:

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[h264_cuvid @ 0x556e21e67e00] Initializing cuvid hwaccel
[h264_cuvid @ 0x556e21e67e00] Initializing CUDA frames context: sw_format = nv12, width = 720, height = 576
[h264_cuvid @ 0x556e21e67e00] Format cuda chosen by get_format().
[h264_cuvid @ 0x556e21e67e00] Formats: Original: cuda | HW: cuda | SW: nv12 [graph 0 input from stream 0:16 @ 0x556e28bcd500] Setting 'video_size' to value '720x576' [graph 0 input from stream 0:16 @ 0x556e28bcd500] Setting 'pix_fmt' to value '119' [graph 0 input from stream 0:16 @ 0x556e28bcd500] Setting 'time_base' to value '1/90000' [graph 0 input from stream 0:16 @ 0x556e28bcd500] Setting 'pixel_aspect' to value '16/11' [graph 0 input from stream 0:16 @ 0x556e28bcd500] Setting 'sws_param' to value 'flags=2' [graph 0 input from stream 0:16 @ 0x556e28bcd500] Setting 'frame_rate' to value '25/1' [graph 0 input from stream 0:16 @ 0x556e28bcd500] w:720 h:576 pixfmt:cuda tb:1/90000 fr:25/1 sar:16/11 sws_param:flags=2
[scaler_out_0_0 @ 0x556e280d4380] Setting 'w' to value '720'
[scaler_out_0_0 @ 0x556e280d4380] Setting 'h' to value '576'
[scaler_out_0_0 @ 0x556e280d4380] Setting 'flags' to value 'bicubic'
[scaler_out_0_0 @ 0x556e280d4380] w:720 h:576 flags:'bicubic' interl:0
[format @ 0x556e23b23600] Setting 'pix_fmts' to value 'cuda'
[auto_scaler_0 @ 0x556e2596efc0] Setting 'flags' to value 'bicubic'
[auto_scaler_0 @ 0x556e2596efc0] w:iw h:ih flags:'bicubic' interl:0
[scaler_out_0_0 @ 0x556e280d4380] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_null_0' and the filter 'scaler_out_0_0' Impossible to convert between the formats supported by the filter 'Parsed_null_0' and the filter 'auto_scaler_0'
Error reinitializing filters!
Failed to inject frame into filter network: Function not implemented
Error while processing the decoded data for stream #0:16
[AVIOContext @ 0x556e21e02e40] Statistics: 0 seeks, 9266 writeouts
[h264_nvenc @ 0x556e21e69cc0] Nvenc unloaded
[libfdk_aac @ 0x556e21e3abc0] 2 frames left in the queue on closing
[AVIOContext @ 0x556e21da2d80] Statistics: 1869799120 bytes read, 0 seeks
Conversion failed!
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As I understand, some parameters change after 30-60 minutes in video stream and FFmpeg tries to use software scaler in fully hardware scheme. But I can't figure out exact reasons to act against the problem. I will be very grateful if someone could direct me. I use following cmd line:

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/usr/local/ffmpeg/bin/ffmpeg -analyzeduration 100M -probesize 100M -loglevel debug -hwaccel_device 1 -hwaccel cuvid -c:v h264_cuvid -deint 2 -drop_second_field 1 -i udp://224.4.4.13:1013?fifo_size=250000&overrun_nonfatal=1 -map p:1011:0 -map p:1011:1 -c:v h264_nvenc -profile:v high -level 4.1 -b:v 2048k -c:a libfdk_aac -b:a 128k -af aresample=async=1000 -f mpegts http://192.168.0.10/15/mpegts
---


Many thanks in advance!

Garri
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