#8078 closed defect (invalid)
Closed captions removed when decoding with NVDEC
| Reported by: | Daniel Cantarín | Owned by: | |
|---|---|---|---|
| Priority: | normal | Component: | undetermined |
| Version: | git-master | Keywords: | cuda cc |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
Summary of the bug:
NVDEC seems to remove CEA-608/708 captions from stream.
Related:
https://devtalk.nvidia.com/default/topic/1025092/video-codec-and-optical-flow-sdk/nvenc-with-ffmpeg-for-transcoding-closed-caption-text-display-order-issue-while-using-quot-bf-2-quot-/
http://trac.ffmpeg.org/ticket/6802
http://trac.ffmpeg.org/ticket/6726
Please note the difference between NVDEC (decoding) and NVENC (encoding). This ticket is about the DEcoding system, while the other tickets are ENcoding related.
How to reproduce:
root@cdn1:/# nvidia-smi
Fri Aug 9 21:18:57 2019
+-----------------------------------------------------------------------------+
| NVIDIA-SMI 430.40 Driver Version: 430.40 CUDA Version: 10.1 |
|-------------------------------+----------------------+----------------------+
| GPU Name Persistence-M| Bus-Id Disp.A | Volatile Uncorr. ECC |
| Fan Temp Perf Pwr:Usage/Cap| Memory-Usage | GPU-Util Compute M. |
|===============================+======================+======================|
| 0 Quadro M4000 Off | 00000000:05:00.0 Off | N/A |
| 55% 65C P0 49W / 120W | 2640MiB / 8126MiB | 48% Default |
+-------------------------------+----------------------+----------------------+
+-----------------------------------------------------------------------------+
| Processes: GPU Memory |
| GPU PID Type Process name Usage |
|=============================================================================|
+-----------------------------------------------------------------------------+
root@cdn1:/# wget "http://samples.ffmpeg.org/MPEG-VOB/ClosedCaptions/Starship_Troopers.vob"
--2019-08-09 21:19:40-- http://samples.ffmpeg.org/MPEG-VOB/ClosedCaptions/Starship_Troopers.vob
Resolving samples.ffmpeg.org (samples.ffmpeg.org)... 79.124.17.100
Connecting to samples.ffmpeg.org (samples.ffmpeg.org)|79.124.17.100|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 29618176 (28M)
Saving to: 'Starship_Troopers.vob'
Starship_Troopers.vob 100%[=====================================================================================================>] 28.25M 7.24MB/s in 3.9s
2019-08-09 21:19:45 (7.24 MB/s) - 'Starship_Troopers.vob' saved [29618176/29618176]
root@cdn1:/# ffprobe Starship_Troopers.vob
ffprobe version N-94476-gf12e662 Copyright (c) 2007-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
configuration: --prefix=./ --disable-shared --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda-8.0/targets/x86_64-linux/include --extra-cflags=-I../nvidia/cudautils --extra-ldflags=-L/usr/local/cuda-8.0/targets/x86_64-linux/lib --extra-ldflags=-L../nvidia/cudautils --enable-nonfree --enable-gpl --enable-version3 --enable-avresample --enable-avisynth --enable-openal --enable-opencl --enable-opengl --enable-libnpp --enable-nvenc --enable-libxvid --enable-libxml2 --enable-cuda --enable-cuda-sdk --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libass --enable-libwavpack --enable-libsoxr --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libssh --enable-openssl --enable-omx-rpi --enable-omx --enable-libsrt
libavutil 56. 33.100 / 56. 33.100
libavcodec 58. 55.100 / 58. 55.100
libavformat 58. 30.100 / 58. 30.100
libavdevice 58. 9.100 / 58. 9.100
libavfilter 7. 58.100 / 7. 58.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, mpeg, from 'Starship_Troopers.vob':
Duration: 00:00:51.30, start: 1986.626100, bitrate: 4618 kb/s
Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top first), 720x480 [SAR 32:27 DAR 16:9], Closed Captions, 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
Stream #0:1[0x83]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:2[0x82]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:3[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:4[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s
Stream #0:5[0x20]: Subtitle: dvd_subtitle
Stream #0:6[0x22]: Subtitle: dvd_subtitle
root@cdn1:/# ffmpeg -y -i Starship_Troopers.vob -map 'i:0x1e0' -c:v h264_nvenc -f mpegts out1.mp4
ffmpeg version N-94476-gf12e662 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
configuration: --prefix=./ --disable-shared --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda-8.0/targets/x86_64-linux/include --extra-cflags=-I../nvidia/cudautils --extra-ldflags=-L/usr/local/cuda-8.0/targets/x86_64-linux/lib --extra-ldflags=-L../nvidia/cudautils --enable-nonfree --enable-gpl --enable-version3 --enable-avresample --enable-avisynth --enable-openal --enable-opencl --enable-opengl --enable-libnpp --enable-nvenc --enable-libxvid --enable-libxml2 --enable-cuda --enable-cuda-sdk --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libass --enable-libwavpack --enable-libsoxr --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libssh --enable-openssl --enable-omx-rpi --enable-omx --enable-libsrt
libavutil 56. 33.100 / 56. 33.100
libavcodec 58. 55.100 / 58. 55.100
libavformat 58. 30.100 / 58. 30.100
libavdevice 58. 9.100 / 58. 9.100
libavfilter 7. 58.100 / 7. 58.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, mpeg, from 'Starship_Troopers.vob':
Duration: 00:00:51.30, start: 1986.626100, bitrate: 4618 kb/s
Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top first), 720x480 [SAR 32:27 DAR 16:9], Closed Captions, 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
Stream #0:1[0x83]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:2[0x82]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:3[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:4[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s
Stream #0:5[0x20]: Subtitle: dvd_subtitle
Stream #0:6[0x22]: Subtitle: dvd_subtitle
Stream mapping:
Stream #0:0 -> #0:0 (mpeg2video (native) -> h264 (h264_nvenc))
Press [q] to stop, [?] for help
Output #0, mpegts, to 'out1.mp4':
Metadata:
encoder : Lavf58.30.100
Stream #0:0: Video: h264 (h264_nvenc) (Main), yuv420p, 720x480 [SAR 32:27 DAR 16:9], q=-1--1, 2000 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
Metadata:
encoder : Lavc58.55.100 h264_nvenc
Side data:
cpb: bitrate max/min/avg: 0/0/2000000 buffer size: 4000000 vbv_delay: -1
[mpeg @ 0x5580626fca00] New subtitle stream 0:7 at pos:8497166 and DTS:1999.51s/s speed=17.9x
[mpeg2video @ 0x55806273b080] ac-tex damaged at 3 270:47.48 bitrate=1678.4kbits/s speed=23.7x
[mpeg2video @ 0x55806273b080] Warning MVs not available
[mpeg2video @ 0x55806273b080] concealing 135 DC, 135 AC, 135 MV errors in I frame
Starship_Troopers.vob: corrupt decoded frame in stream 0
frame= 1229 fps=575 q=23.0 Lsize= 10725kB time=00:00:51.28 bitrate=1713.2kbits/s speed= 24x
video:9811kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 9.312987%
root@cdn1:/# ffprobe out1.mp4
ffprobe version N-94476-gf12e662 Copyright (c) 2007-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
configuration: --prefix=./ --disable-shared --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda-8.0/targets/x86_64-linux/include --extra-cflags=-I../nvidia/cudautils --extra-ldflags=-L/usr/local/cuda-8.0/targets/x86_64-linux/lib --extra-ldflags=-L../nvidia/cudautils --enable-nonfree --enable-gpl --enable-version3 --enable-avresample --enable-avisynth --enable-openal --enable-opencl --enable-opengl --enable-libnpp --enable-nvenc --enable-libxvid --enable-libxml2 --enable-cuda --enable-cuda-sdk --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libass --enable-libwavpack --enable-libsoxr --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libssh --enable-openssl --enable-omx-rpi --enable-omx --enable-libsrt
libavutil 56. 33.100 / 56. 33.100
libavcodec 58. 55.100 / 58. 55.100
libavformat 58. 30.100 / 58. 30.100
libavdevice 58. 9.100 / 58. 9.100
libavfilter 7. 58.100 / 7. 58.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, mpegts, from 'out1.mp4':
Duration: 00:00:51.32, start: 1.400000, bitrate: 1712 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 720x480 [SAR 32:27 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
root@cdn1:/# ffmpeg -y -c:v mpeg2_cuvid -i Starship_Troopers.vob -map 'i:0x1e0' -c:v h264_nvenc -f mpegts out2.mp4
ffmpeg version N-94476-gf12e662 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
configuration: --prefix=./ --disable-shared --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda-8.0/targets/x86_64-linux/include --extra-cflags=-I../nvidia/cudautils --extra-ldflags=-L/usr/local/cuda-8.0/targets/x86_64-linux/lib --extra-ldflags=-L../nvidia/cudautils --enable-nonfree --enable-gpl --enable-version3 --enable-avresample --enable-avisynth --enable-openal --enable-opencl --enable-opengl --enable-libnpp --enable-nvenc --enable-libxvid --enable-libxml2 --enable-cuda --enable-cuda-sdk --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libass --enable-libwavpack --enable-libsoxr --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libssh --enable-openssl --enable-omx-rpi --enable-omx --enable-libsrt
libavutil 56. 33.100 / 56. 33.100
libavcodec 58. 55.100 / 58. 55.100
libavformat 58. 30.100 / 58. 30.100
libavdevice 58. 9.100 / 58. 9.100
libavfilter 7. 58.100 / 7. 58.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, mpeg, from 'Starship_Troopers.vob':
Duration: 00:00:51.30, start: 1986.626100, bitrate: 4618 kb/s
Stream #0:0[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, top first), 720x480 [SAR 32:27 DAR 16:9], Closed Captions, 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
Stream #0:1[0x83]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:2[0x82]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:3[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s
Stream #0:4[0x81]: Audio: ac3, 48000 Hz, 5.1(side), fltp, 384 kb/s
Stream #0:5[0x20]: Subtitle: dvd_subtitle
Stream #0:6[0x22]: Subtitle: dvd_subtitle
Stream mapping:
Stream #0:0 -> #0:0 (mpeg2video (mpeg2_cuvid) -> h264 (h264_nvenc))
Press [q] to stop, [?] for help
Output #0, mpegts, to 'out2.mp4':
Metadata:
encoder : Lavf58.30.100
Stream #0:0: Video: h264 (h264_nvenc) (Main), nv12, 720x480 [SAR 32:27 DAR 16:9], q=-1--1, 2000 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
Metadata:
encoder : Lavc58.55.100 h264_nvenc
Side data:
cpb: bitrate max/min/avg: 0/0/2000000 buffer size: 4000000 vbv_delay: -1
[mpeg @ 0x55621a00fa40] New subtitle stream 0:7 at pos:8497166 and DTS:1999.51s/s speed=10.4x
frame= 1229 fps=371 q=23.0 Lsize= 10718kB time=00:00:51.35 bitrate=1709.8kbits/s speed=15.5x
video:9806kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 9.301291%
root@cdn1:/# ffprobe out2.mp4
ffprobe version N-94476-gf12e662 Copyright (c) 2007-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
configuration: --prefix=./ --disable-shared --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda-8.0/targets/x86_64-linux/include --extra-cflags=-I../nvidia/cudautils --extra-ldflags=-L/usr/local/cuda-8.0/targets/x86_64-linux/lib --extra-ldflags=-L../nvidia/cudautils --enable-nonfree --enable-gpl --enable-version3 --enable-avresample --enable-avisynth --enable-openal --enable-opencl --enable-opengl --enable-libnpp --enable-nvenc --enable-libxvid --enable-libxml2 --enable-cuda --enable-cuda-sdk --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libass --enable-libwavpack --enable-libsoxr --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libssh --enable-openssl --enable-omx-rpi --enable-omx --enable-libsrt
libavutil 56. 33.100 / 56. 33.100
libavcodec 58. 55.100 / 58. 55.100
libavformat 58. 30.100 / 58. 30.100
libavdevice 58. 9.100 / 58. 9.100
libavfilter 7. 58.100 / 7. 58.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, mpegts, from 'out2.mp4':
Duration: 00:00:51.38, start: 1.400000, bitrate: 1708 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 720x480 [SAR 32:27 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
root@cdn1:/# ffmpeg -y -c:v h264_cuvid -i out1.mp4 -map 'i:0x100' -c:v h264_nvenc -f mpegts out3.mp4
ffmpeg version N-94476-gf12e662 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
configuration: --prefix=./ --disable-shared --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda-8.0/targets/x86_64-linux/include --extra-cflags=-I../nvidia/cudautils --extra-ldflags=-L/usr/local/cuda-8.0/targets/x86_64-linux/lib --extra-ldflags=-L../nvidia/cudautils --enable-nonfree --enable-gpl --enable-version3 --enable-avresample --enable-avisynth --enable-openal --enable-opencl --enable-opengl --enable-libnpp --enable-nvenc --enable-libxvid --enable-libxml2 --enable-cuda --enable-cuda-sdk --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libass --enable-libwavpack --enable-libsoxr --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libssh --enable-openssl --enable-omx-rpi --enable-omx --enable-libsrt
libavutil 56. 33.100 / 56. 33.100
libavcodec 58. 55.100 / 58. 55.100
libavformat 58. 30.100 / 58. 30.100
libavdevice 58. 9.100 / 58. 9.100
libavfilter 7. 58.100 / 7. 58.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, mpegts, from 'out1.mp4':
Duration: 00:00:51.32, start: 1.400000, bitrate: 1712 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 720x480 [SAR 32:27 DAR 16:9], Closed Captions, 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Stream mapping:
Stream #0:0 -> #0:0 (h264 (h264_cuvid) -> h264 (h264_nvenc))
Press [q] to stop, [?] for help
Output #0, mpegts, to 'out3.mp4':
Metadata:
encoder : Lavf58.30.100
Stream #0:0: Video: h264 (h264_nvenc) (Main), nv12, 720x480 [SAR 32:27 DAR 16:9], q=-1--1, 2000 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
Metadata:
encoder : Lavc58.55.100 h264_nvenc
Side data:
cpb: bitrate max/min/avg: 0/0/2000000 buffer size: 4000000 vbv_delay: -1
frame= 1229 fps=427 q=21.0 Lsize= 10752kB time=00:00:51.41 bitrate=1713.0kbits/s speed=17.9x
video:9834kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 9.330894%
root@cdn1:/# ffprobe out3.mp4
ffprobe version N-94476-gf12e662 Copyright (c) 2007-2019 the FFmpeg developers
built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
configuration: --prefix=./ --disable-shared --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda-8.0/targets/x86_64-linux/include --extra-cflags=-I../nvidia/cudautils --extra-ldflags=-L/usr/local/cuda-8.0/targets/x86_64-linux/lib --extra-ldflags=-L../nvidia/cudautils --enable-nonfree --enable-gpl --enable-version3 --enable-avresample --enable-avisynth --enable-openal --enable-opencl --enable-opengl --enable-libnpp --enable-nvenc --enable-libxvid --enable-libxml2 --enable-cuda --enable-cuda-sdk --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libass --enable-libwavpack --enable-libsoxr --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libssh --enable-openssl --enable-omx-rpi --enable-omx --enable-libsrt
libavutil 56. 33.100 / 56. 33.100
libavcodec 58. 55.100 / 58. 55.100
libavformat 58. 30.100 / 58. 30.100
libavdevice 58. 9.100 / 58. 9.100
libavfilter 7. 58.100 / 7. 58.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 6.100 / 5. 6.100
libswresample 3. 6.100 / 3. 6.100
libpostproc 55. 6.100 / 55. 6.100
Input #0, mpegts, from 'out3.mp4':
Duration: 00:00:51.45, start: 1.400000, bitrate: 1711 kb/s
Program 1
Metadata:
service_name : Service01
service_provider: FFmpeg
Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 720x480 [SAR 32:27 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
Those steps should be reproducible on a machine with nvidia card by just copying and pasting the commands. Please note the ffprobe output after each test: with software DEcoding, even when using hardware ENcoding, the stream deails say "Closed Captions". With hardware DEcoding, closed captions are never detected again, no matter the input stream codec (in the example, I've tested mpeg2 and h264).
I believe this was fixed in another (now closed) issue, but only for ENcoding.
Change History (10)
comment:1 by , 5 years ago
comment:2 by , 5 years ago
Oh, I don't know, good point.
Now that you say it, I'm thinking about other possible decoders. I may have a raspberry pi somewhere, but right now I just have nVidia cards here. Do you know of any other common hardware decoder we could try?
If you happen to have some non-nVidia HW Decoder, please do try it and tell us what happens.
Thanks.
comment:4 by , 5 years ago
You are using the deprecated cuvid decoder implementations, which don't support such metadata.
If you instead used the actual nvdec hardware acceleration, it should work just fine.
comment:5 by , 5 years ago
@heleppkes
I've rebuilt ffmpeg with --enable-nvdec and don't see any indication of a "nvdec" hwaccel or any "*_nvdec" decoder.
root@cdn1:/opt/src/build/ffmpeg_build# ffmpeg -hwaccels ffmpeg version N-94476-gf12e662 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1) configuration: --prefix=./ --disable-shared --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda-8.0/targets/x86_64-linux/include --extra-cflags=-I../nvidia/cudautils --extra-ldflags=-L/usr/local/cuda-8.0/targets/x86_64-linux/lib --extra-ldflags=-L../nvidia/cudautils --enable-nonfree --enable-gpl --enable-version3 --enable-avresample --enable-avisynth --enable-openal --enable-opencl --enable-opengl --enable-libnpp --enable-nvenc --enable-nvdec --enable-libxvid --enable-libxml2 --enable-cuda --enable-cuda-nvcc --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libass --enable-libwavpack --enable-libsoxr --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libssh --enable-openssl --enable-omx-rpi --enable-omx --enable-libsrt libavutil 56. 33.100 / 56. 33.100 libavcodec 58. 55.100 / 58. 55.100 libavformat 58. 30.100 / 58. 30.100 libavdevice 58. 9.100 / 58. 9.100 libavfilter 7. 58.100 / 7. 58.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 libpostproc 55. 6.100 / 55. 6.100 Hardware acceleration methods: vdpau cuda vaapi opencl cuvid root@cdn1:/opt/src/build/ffmpeg_build# ffmpeg -decoders | grep -i nv ffmpeg version N-94476-gf12e662 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1) configuration: --prefix=./ --disable-shared --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda-8.0/targets/x86_64-linux/include --extra-cflags=-I../nvidia/cudautils --extra-ldflags=-L/usr/local/cuda-8.0/targets/x86_64-linux/lib --extra-ldflags=-L../nvidia/cudautils --enable-nonfree --enable-gpl --enable-version3 --enable-avresample --enable-avisynth --enable-openal --enable-opencl --enable-opengl --enable-libnpp --enable-nvenc --enable-nvdec --enable-libxvid --enable-libxml2 --enable-cuda --enable-cuda-nvcc --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libass --enable-libwavpack --enable-libsoxr --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libssh --enable-openssl --enable-omx-rpi --enable-omx --enable-libsrt libavutil 56. 33.100 / 56. 33.100 libavcodec 58. 55.100 / 58. 55.100 libavformat 58. 30.100 / 58. 30.100 libavdevice 58. 9.100 / 58. 9.100 libavfilter 7. 58.100 / 7. 58.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 libpostproc 55. 6.100 / 55. 6.100 V....D dsicinvideo Delphine Software International CIN video V..... h264_cuvid Nvidia CUVID H264 decoder (codec h264) V..... hevc_cuvid Nvidia CUVID HEVC decoder (codec hevc) V....D idcinvideo id Quake II CIN video (codec idcin) V..... mjpeg_cuvid Nvidia CUVID MJPEG decoder (codec mjpeg) V..... mpeg1_cuvid Nvidia CUVID MPEG1VIDEO decoder (codec mpeg1video) V..... mpeg2_cuvid Nvidia CUVID MPEG2VIDEO decoder (codec mpeg2video) V..... mpeg4_cuvid Nvidia CUVID MPEG4 decoder (codec mpeg4) V..... vc1_cuvid Nvidia CUVID VC1 decoder (codec vc1) V..... vp8_cuvid Nvidia CUVID VP8 decoder (codec vp8) V..... vp9_cuvid Nvidia CUVID VP9 decoder (codec vp9) V....D wnv1 Winnov WNV1 A....D twinvq VQF TwinVQ
However, I can see the encoders named "*_nvenc":
root@cdn1:/opt/src/build/ffmpeg_build# ffmpeg -encoders | grep -i nv ffmpeg version N-94476-gf12e662 Copyright (c) 2000-2019 the FFmpeg developers built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1) configuration: --prefix=./ --disable-shared --extra-cflags=-I/usr/local/include --extra-cflags=-I/usr/local/cuda-8.0/targets/x86_64-linux/include --extra-cflags=-I../nvidia/cudautils --extra-ldflags=-L/usr/local/cuda-8.0/targets/x86_64-linux/lib --extra-ldflags=-L../nvidia/cudautils --enable-nonfree --enable-gpl --enable-version3 --enable-avresample --enable-avisynth --enable-openal --enable-opencl --enable-opengl --enable-libnpp --enable-nvenc --enable-nvdec --enable-libxvid --enable-libxml2 --enable-cuda --enable-cuda-nvcc --enable-vaapi --enable-vdpau --enable-libx264 --enable-libx265 --enable-libass --enable-libwavpack --enable-libsoxr --enable-libfdk-aac --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libtheora --enable-libvorbis --enable-libvpx --enable-librtmp --enable-libssh --enable-openssl --enable-omx-rpi --enable-omx --enable-libsrt libavutil 56. 33.100 / 56. 33.100 libavcodec 58. 55.100 / 58. 55.100 libavformat 58. 30.100 / 58. 30.100 libavdevice 58. 9.100 / 58. 9.100 libavfilter 7. 58.100 / 7. 58.100 libavresample 4. 0. 0 / 4. 0. 0 libswscale 5. 6.100 / 5. 6.100 libswresample 3. 6.100 / 3. 6.100 libpostproc 55. 6.100 / 55. 6.100 V..... h264_nvenc NVIDIA NVENC H.264 encoder (codec h264) V..... nvenc NVIDIA NVENC H.264 encoder (codec h264) V..... nvenc_h264 NVIDIA NVENC H.264 encoder (codec h264) V..... nvenc_hevc NVIDIA NVENC hevc encoder (codec hevc) V..... hevc_nvenc NVIDIA NVENC hevc encoder (codec hevc)
May it be some other flag I need to enable? Maybe some dependency? I'm working in an Ubuntu 18.04 system.
comment:6 by , 5 years ago
| Analyzed by developer: | set |
|---|---|
| Resolution: | → invalid |
| Status: | new → closed |
It's a hwaccel, not a dedicated decoder. Just pass -hwaccel nvdec and use the default decoder.
comment:7 by , 5 years ago
Thanks oromit.
-hwaccel nvdec did work, even as it was not printed in the ffmpeg -hwaccels list.
However, if I transcode decoding with just hwaccel and default decoder, it works at ~10X. If I use -c:v mpeg2_cuvid for the input, it works at ~16X. That's a lot of performance loss.
Isn't there a mpeg2_nvdec decoder out there that I may be missing?
comment:8 by , 5 years ago
You need both -hwaccel nvdec and -hwaccel_output_format cuda to get a full transcoding pipeline. This is normal hwaccel behaviour. The fact that cuvid defaults the hardware output format is the exception, and not the rule.
After that, you should see equivalent performance.
comment:9 by , 5 years ago
| Component: | ffmpeg → undetermined |
|---|---|
| Keywords: | cuda added; nvidia nvdec removed |
comment:10 by , 4 years ago
| Analyzed by developer: | unset |
|---|
Hi Canta. Were you able to get closed captioning to survive while maintaining performance? If so what does you command end up looking like? Thank you.
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Does this also happen with other hardware decoders? Cause the code parsing stuff like CC is independent of the hardware decoder, which only decodes the actual video. None of the other hardware decoders deal with a53 in their code.