Please see my input udp stream information:
ffprobe udp://IP:PORT
Input #0, mpegts, from 'udp://IP:PORT': Duration: N/A, start: 42243.737022, bitrate: N/A Program 17 . . . Stream #0:0[0x781]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt470bg, top first), 720x576 [SAR 12:11 DAR 15:11], 24.67 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0x782](Tam): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, mono, s16p, 64 kb/s Stream #0:2[0x783](Kan): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, mono, s16p, 64 kb/s And run this command again:
ffprobe udp://IP:PORT
Input #0, mpegts, from 'IP:PORT': Duration: N/A, start: 42589.601022, bitrate: N/A . . . Program 17 Stream #0:0[0x781]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, bt470bg, top first), 720x576 [SAR 12:11 DAR 15:11], 24.58 fps, 25 tbr, 90k tbn, 50 tbc Stream #0:1[0x782](Tam): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, mono, s16p, 64 kb/s Stream #0:2[0x783](Kan): Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, mono, s16p, 64 kb/s Please pay attention to FPS value. In the first execution it 24.67 and in the second it 24.58
I want to transcode this stream with the following command:
ffmpeg -y -hwaccel cuvid -c:v h264_cuvid -deint 2 -i "udp://IP:PORT" -map 0:#0x0781 -map 0:#0x0782 -vcodec h264_nvenc -acodec libfdk_aac -f flv rtmp://IP/test/name
Please see the log:
Past duration 0.981102 too large frame=83 fps=0.0 q=18.0 size=502kB time=00:00:04.05 bitrate=1015.4kbits/s dup=0 drop=80 speed=7.42x frame=96 fps=90 q=18.0 size=643kB time=00:00:04.69 bitrate=1122.1kbits/s dup=0 drop=93 speed=4.38x frame=111 fps=70 q=18.0 size=802kB time=00:00:05.14 bitrate=1278.1kbits/s dup=0 drop=108 speed=3.26x frame=121 fps=57 q=19.0 size=921kB time=00:00:05.61 bitrate=1344.7kbits/s dup=0 drop=118 speed=2.64x frame=137 fps=49 q=19.0 size=1096kB time=00:00:06.25 bitrate=1436.4kbits/s dup=0 drop=134 speed=2.26x I also can add the framerate parameter "-r". As follow:
ffmpeg -y -hwaccel cuvid -c:v h264_cuvid -deint 2 -r 25 -i "udp://IP:PORT" -map 0:#0x0781 -map 0:#0x0782 -vcodec h264_nvenc -r 25 -acodec libfdk_aac -f flv rtmp://IP/test/name
In this case this warning is not shows. But the transcoding FFmpeg process failed after 10-15 seconds, without any errors in the log.
Everything works fine if I do it via software decoding:
ffmpeg -y -i "udp://IP:PORT" -map 0:#0x0781 -map 0:#0x0782 -vcodec h264_nvenc -acodec libfdk_aac -f flv rtmp://IP/test/name
Also everything works fine if I transcoding it to the local file and specify framerate:
ffmpeg -y -hwaccel cuvid -c:v h264_cuvid -deint 2 -r 25 -i "udp://IP:PORT" -map 0:#0x0781 -map 0:#0x0782 -vcodec h264_nvenc -r 25 -acodec libfdk_aac -f flv result.flv
This issue affects only for some input streams.
How can I transcode this UDP stream to FLV stream with CUDA decoding?
