Well that is helpful information if not a bit disappointing. Perhaps if I use the SDK calls to get the individual timecode components _and_ check the drop frame flag I can reassemble what the GetString() method on the IDeckLinkTimecode class is supposed to provide.
I will add that to the next patch, but it might be a minute before I get to it. Thank you again for taking a look. I guess we got really lucky in our use case. Thanks, Jon > On May 31, 2018, at 12:39 PM, Dave Rice <d...@dericed.com> wrote: > > Hi Jonathan, > >> On May 31, 2018, at 11:41 AM, Jonathan Morley <jmor...@pixsystem.com >> <mailto:jmor...@pixsystem.com>> wrote: >> >> Thank you very much, Dave. I am really curious about the df vs ndf since the >> Blackmagic SDK call I am making doesn’t have any arguments for specifying >> that kind of distinction. It simply returns what it finds in the SDI stream. > > I know have a tape known to be NDF and a tape known to be DF. The messages I > sent before were from DF tapes. When I tried a NDF tape, I get the "Unable to > find timecode” warning repeatedly and no timecode on the output file. > > ./ffmpeg -timecode_format vitc2 -f decklink -draw_bars 0 -audio_input > embedded -video_input sdi -format_code ntsc -channels 8 -raw_format yuv422p10 > -i "UltraStudio 3D" -c:v v210 -c:a aac devlin5.mov > ffmpeg version N-91200-g1616b1be5a Copyright (c) 2000-2018 the FFmpeg > developers > built with Apple LLVM version 9.0.0 (clang-900.0.38) > configuration: --enable-nonfree --enable-decklink > --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/include > libavutil 56. 18.102 / 56. 18.102 > libavcodec 58. 19.104 / 58. 19.104 > libavformat 58. 17.100 / 58. 17.100 > libavdevice 58. 4.100 / 58. 4.100 > libavfilter 7. 24.100 / 7. 24.100 > libswscale 5. 2.100 / 5. 2.100 > libswresample 3. 2.100 / 3. 2.100 > [decklink @ 0x7f9f66800000] Found Decklink mode 720 x 486 with rate 29.97(i) > [decklink @ 0x7f9f66800000] Unable to find timecode. > Last message repeated 5 times > Guessed Channel Layout for Input Stream #0.0 : 7.1 > Input #0, decklink, from 'UltraStudio 3D': > Duration: N/A, start: 0.000000, bitrate: 229869 kb/s > Stream #0:0: Audio: pcm_s16le, 48000 Hz, 7.1, s16, 6144 kb/s > Stream #0:1: Video: v210 (V210 / 0x30313256), yuv422p10le(bottom first), > 720x486, 223725 kb/s, 29.97 fps, 29.97 tbr, 1000k tbn, 1000k tbc > Stream mapping: > Stream #0:1 -> #0:0 (v210 (native) -> v210 (native)) > Stream #0:0 -> #0:1 (pcm_s16le (native) -> aac (native)) > Press [q] to stop, [?] for help > Output #0, mov, to 'devlin5.mov': > Metadata: > encoder : Lavf58.17.100 > Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le(bottom coded > first (swapped)), 720x486, q=2-31, 223725 kb/s, 29.97 fps, 30k tbn, 29.97 tbc > Metadata: > encoder : Lavc58.19.104 v210 > Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 7.1, fltp, 469 > kb/s > Metadata: > encoder : Lavc58.19.104 aac > [decklink @ 0x7f9f66800000] Unable to find timecode. > Last message repeated 15 times > [decklink @ 0x7f9f66800000] Unable to find timecode.0:00.70 > bitrate=200517.8kbits/s speed= 1.4x > Last message repeated 14 times > [decklink @ 0x7f9f66800000] Unable to find timecode.0:01.20 > bitrate=211246.0kbits/s speed= 1.2x > Last message repeated 14 times > [decklink @ 0x7f9f66800000] Unable to find timecode.0:01.70 > bitrate=214431.3kbits/s speed=1.13x > Last message repeated 14 times > [decklink @ 0x7f9f66800000] Unable to find timecode.0:02.20 > bitrate=217121.0kbits/s speed= 1.1x > Last message repeated 14 times > [decklink @ 0x7f9f66800000] Unable to find timecode.0:02.70 > bitrate=221142.3kbits/s speed=1.07x > Last message repeated 14 times > [decklink @ 0x7f9f66800000] Unable to find timecode.0:03.20 > bitrate=221288.2kbits/s speed=1.06x > > So when inputing DF this appears to work while Media Express gets it wrong by > writing the timecode with a NDF flag. > However when inputing NDF no timecode is communicated. > > I ran this to check if somehow I was called the wrong timecode > > for i in rp188vitc rp188vitc2 rp188ltc rp188any vitc vitc2 serial ; do echo > -n "${i}: " ; ./ffprobe -v quiet -timecode_format "$i" -f decklink -draw_bars > 0 -audio_input embedded -video_input sdi -format_code ntsc -channels 8 > -raw_format yuv422p10 -i "UltraStudio 3D" -select_streams v -show_entries > stream_tags=timecode -of default=nw=1:nk=1 ; echo ; done > > rp188vitc: > rp188vitc2: > rp188ltc: > rp188any: > vitc: > vitc2: > serial: > > I may try to find another NDF tape to make sure this isn’t a fluke. > >> And when I skimmed the movenc timecode handling it doesn’t seem to make any >> assumptions or changes either. > > I’ve replicated it with Matroska which simply moves the timecode into > metadata as a string. > >> Please keep me posted. Meanwhile I will look into what could be causing all >> the error chatter. > > Thanks! > >> Thanks, >> Jon >> >>> On May 31, 2018, at 7:59 AM, Dave Rice <d...@dericed.com> wrote: >>> >>> >>>> On May 31, 2018, at 5:49 AM, Jonathan Morley <jmor...@pixsystem.com> wrote: >>>> >>>> Please take a look at my latest patches. >>>> >>>> NOTE: I no longer have the hardware to test this work! >>> >>> I tested these patches with an Ultrastudio 3D. >>> >>> I find that in some cases it provides the “Unable to set timecode” warning >>> although it does provide the timecode value. Such as: >>> >>> ./ffmpeg -timecode_format vitc -f decklink -draw_bars 0 -audio_input >>> embedded -video_input sdi -format_code ntsc -channels 8 -raw_format >>> yuv422p10 -i "UltraStudio 3D" -c:v v210 -c:a aac signs.mov >>> ffmpeg version N-91200-g1616b1be5a Copyright (c) 2000-2018 the FFmpeg >>> developers >>> built with Apple LLVM version 9.0.0 (clang-900.0.38) >>> configuration: --enable-nonfree --enable-decklink >>> --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/include >>> libavutil 56. 18.102 / 56. 18.102 >>> libavcodec 58. 19.104 / 58. 19.104 >>> libavformat 58. 17.100 / 58. 17.100 >>> libavdevice 58. 4.100 / 58. 4.100 >>> libavfilter 7. 24.100 / 7. 24.100 >>> libswscale 5. 2.100 / 5. 2.100 >>> libswresample 3. 2.100 / 3. 2.100 >>> [decklink @ 0x7f8711802600] Found Decklink mode 720 x 486 with rate 29.97(i) >>> [decklink @ 0x7f8711802600] Unable to set timecode >>> Guessed Channel Layout for Input Stream #0.0 : 7.1 >>> Input #0, decklink, from 'UltraStudio 3D': >>> Duration: N/A, start: 0.000000, bitrate: 229869 kb/s >>> Stream #0:0: Audio: pcm_s16le, 48000 Hz, 7.1, s16, 6144 kb/s >>> Stream #0:1: Video: v210 (V210 / 0x30313256), yuv422p10le(bottom first), >>> 720x486, 223725 kb/s, 29.97 fps, 29.97 tbr, 1000k tbn, 1000k tbc >>> Metadata: >>> timecode : 00:59:53;25 >>> Stream mapping: >>> Stream #0:1 -> #0:0 (v210 (native) -> v210 (native)) >>> Stream #0:0 -> #0:1 (pcm_s16le (native) -> aac (native)) >>> Press [q] to stop, [?] for help >>> Output #0, mov, to 'signs.mov': >>> Metadata: >>> encoder : Lavf58.17.100 >>> Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le(bottom coded >>> first (swapped)), 720x486, q=2-31, 223725 kb/s, 0.03 fps, 30k tbn, 29.97 tbc >>> Metadata: >>> timecode : 00:59:53;25 >>> encoder : Lavc58.19.104 v210 >>> Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 7.1, fltp, 469 >>> kb/s >>> Metadata: >>> encoder : Lavc58.19.104 aac >>> frame= 407 fps= 30 q=-0.0 Lsize= 371576kB time=00:00:13.54 >>> bitrate=224697.2kbits/s speed=1.01x >>> video:370879kB audio:685kB subtitle:0kB other streams:0kB global >>> headers:0kB muxing overhead: 0.003177% >>> [aac @ 0x7f8711805800] Qavg: 30894.625 >>> >>> Another comment is that if I start the recording with ffmpeg before I play >>> through a source I get spammed with timecode errors such as: >>> >>> ./ffmpeg -timecode_format vitc -f decklink -draw_bars 0 -audio_input >>> embedded -video_input sdi -format_code ntsc -channels 8 -raw_format >>> yuv422p10 -i "UltraStudio 3D" -c:v v210 -c:a aac notplaying.mov >>> ffmpeg version N-91200-g1616b1be5a Copyright (c) 2000-2018 the FFmpeg >>> developers >>> built with Apple LLVM version 9.0.0 (clang-900.0.38) >>> configuration: --enable-nonfree --enable-decklink >>> --extra-cflags=-I/usr/local/include --extra-ldflags=-L/usr/local/include >>> libavutil 56. 18.102 / 56. 18.102 >>> libavcodec 58. 19.104 / 58. 19.104 >>> libavformat 58. 17.100 / 58. 17.100 >>> libavdevice 58. 4.100 / 58. 4.100 >>> libavfilter 7. 24.100 / 7. 24.100 >>> libswscale 5. 2.100 / 5. 2.100 >>> libswresample 3. 2.100 / 3. 2.100 >>> [decklink @ 0x7fe313803000] Found Decklink mode 720 x 486 with rate 29.97(i) >>> [decklink @ 0x7fe313803000] Unable to find timecode. >>> Last message repeated 5 times >>> Guessed Channel Layout for Input Stream #0.0 : 7.1 >>> Input #0, decklink, from 'UltraStudio 3D': >>> Duration: N/A, start: 0.000000, bitrate: 229869 kb/s >>> Stream #0:0: Audio: pcm_s16le, 48000 Hz, 7.1, s16, 6144 kb/s >>> Stream #0:1: Video: v210 (V210 / 0x30313256), yuv422p10le(bottom first), >>> 720x486, 223725 kb/s, 29.97 fps, 29.97 tbr, 1000k tbn, 1000k tbc >>> Stream mapping: >>> Stream #0:1 -> #0:0 (v210 (native) -> v210 (native)) >>> Stream #0:0 -> #0:1 (pcm_s16le (native) -> aac (native)) >>> Press [q] to stop, [?] for help >>> Output #0, mov, to 'notplaying.mov': >>> Metadata: >>> encoder : Lavf58.17.100 >>> Stream #0:0: Video: v210 (v210 / 0x30313276), yuv422p10le(bottom coded >>> first (swapped)), 720x486, q=2-31, 223725 kb/s, 29.97 fps, 30k tbn, 29.97 >>> tbc >>> Metadata: >>> encoder : Lavc58.19.104 v210 >>> Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, 7.1, fltp, 469 >>> kb/s >>> Metadata: >>> encoder : Lavc58.19.104 aac >>> [decklink @ 0x7fe313803000] Unable to find timecode. >>> Last message repeated 14 times >>> [decklink @ 0x7fe313803000] Unable to find timecode.0:00.66 >>> bitrate=210543.0kbits/s speed=1.33x >>> Last message repeated 14 times >>> [decklink @ 0x7fe313803000] Unable to find timecode.0:01.16 >>> bitrate=217281.3kbits/s speed=1.17x >>> Last message repeated 14 times >>> [decklink @ 0x7fe313803000] Unable to find timecode.0:01.66 >>> bitrate=218719.7kbits/s speed=1.11x >>> Last message repeated 14 times >>> [decklink @ 0x7fe313803000] Unable to find timecode.0:02.16 >>> bitrate=219494.2kbits/s speed=1.08x >>> Last message repeated 14 times >>> [decklink @ 0x7fe313803000] Unable to find timecode.0:02.66 >>> bitrate=220763.9kbits/s speed=1.07x >>> Last message repeated 14 times >>> [decklink @ 0x7fe313803000] Unable to find timecode.0:03.16 >>> bitrate=220971.1kbits/s speed=1.06x >>> Last message repeated 14 times >>> [decklink @ 0x7fe313803000] Unable to find timecode.0:03.67 >>> bitrate=221693.2kbits/s speed=1.05x >>> Last message repeated 14 times >>> [decklink @ 0x7fe313803000] Unable to find timecode.0:04.17 >>> bitrate=223247.5kbits/s speed=1.04x >>> >>> Until I hit the play button on my source. >>> >>> I tested the same videotape sources with Media Express and ffmpeg with this >>> patch and the initial timecode values are aligned to the same frames >>> accurately, but with 4 random videotapes I’ve tried, all the Media Express >>> captures are Non-Drop Frame and all the ffmpeg captures are Drop Frame, so >>> one has to be wrong. I’ll try to find a source that can provide a known df >>> and ndf signal to determine which is correct. >>> >>> Thanks for the update, >>> Dave Rice >>> >>> _______________________________________________ >>> ffmpeg-devel mailing list >>> ffmpeg-devel@ffmpeg.org >>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> >> _______________________________________________ >> ffmpeg-devel mailing list >> ffmpeg-devel@ffmpeg.org <mailto:ffmpeg-devel@ffmpeg.org> >> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel >> <http://ffmpeg.org/mailman/listinfo/ffmpeg-devel> > > _______________________________________________ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org <mailto:ffmpeg-devel@ffmpeg.org> > http://ffmpeg.org/mailman/listinfo/ffmpeg-devel > <http://ffmpeg.org/mailman/listinfo/ffmpeg-devel> _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
