_Gyan_

9 ms·

31.
by _Gyan_ 6y ago
The parameters being matched would be those that maintain decoder config. Usually, bitrate/quantizer values don't come into that.
32.
by _Gyan_ 6y ago
Yes, much of the demuxing and decoding relies on libav, but there are other demuxers and decoders in VLC as well. The library for handling DVD/BD playback is also distinct. Managing playback (flow, state, buffering..etc) itself is not
33.
by _Gyan_ 6y ago
The FFmpeg repo is hosted by VLC but isn't managed by them.
34.
by _Gyan_ 6y ago
> -bsv:v h264_metadata=level=3.1 This should be `-bsf:v` and it's not required since this command encodes and the encoder has been informed via `-level`.
35.
by _Gyan_ 6y ago
The last commit is from Mar 2017. Much of the activity in Issues also ends at that time. Looks abandoned rather than matured.
36.
by _Gyan_ 6y ago
I provide Windows builds of ffmpeg, linked via http://ffmpeg.org/download.html . The site is entirely static, no user data is collected or stored. Starting in late October, lasting for around a month, users would get the dre
37.
by _Gyan_ 6y ago
Prolonging the 2nd dose interval increases the level of antibodies elicited after the 2nd dose. Dose Interval --> 28 days after dose 1 --> 28 days after dose 2 <6 weeks --> 8,734.08 --> 22,222.73 6-8 weeks --> 7,295.5
38.
by _Gyan_ 6y ago
They did find fewer asymptomatic infections in the half+full dose arm but the N is not large enough.
39.
by _Gyan_ 6y ago
> Pfizer has the highest efficacy endpoint (95% at preventing infection Cite, please. Pfizer's primary outcome measure was symptomatic infection. Only Oxford/AZ in the UK carried out weekly PCR tests to check for asymptomati
40.
by _Gyan_ 6y ago
No. The h264 decoder is internal. The repo for the commonly used H.264 encoder x264, is hosted at Videolan but its developers were a separate group. VLC also hosts the ffmpeg repo.
41.
by _Gyan_ 6y ago
If both regimens underwent Phase 2 testing, there should be data on comparative immunogenicity.
42.
Inflammatory response is high in Vitamin D deficient Covid-19 patients(nature.com)
2 points by _Gyan_ 6y ago|0 comments
43.
by _Gyan_ 6y ago
ffprobe step nor -t needed. ffmpeg -i input.mp4 -stream_loop -1 -i overlay.mp4 -filter_complex " [1]colorchannelmixer=aa=0.1[2];[2][0]scale2ref[2][1];[1] [2]overlay=shortest=1" -shortest -fflags +shortest -max_inter
44.
by _Gyan_ 6y ago
The FFmpeg project has 8 libraries. libavcodec only deals with decoding/encoding and bitstream parsing & filtering. Demuxing/muxing, frame filtering, scaling.. are all handled by other separate libraries.
45.
by _Gyan_ 6y ago
Can you give a couple of examples of non-trivial tasks that you can do in gstreamer but not ffmpeg?
46.
by _Gyan_ 6y ago
You can set the charenc option for other character sets.
47.
by _Gyan_ 6y ago
What would be much better would be to encode an overlay raster stream, which the player can then composite at runtime, like they do with text subtitles. Much faster to encode. Can be toggled. But players need to support it.
48.
by _Gyan_ 6y ago
I don't like to mix voices - that's inorganic when the changes are more than minor and can lead to parts of the 'answer' being at odds with itself. Except for typos, syntax..etc, I don't edit someone else's ans
49.
by _Gyan_ 6y ago
For quicker triage, open a ticket at trac.ffmpeg.org.
50.
by _Gyan_ 6y ago
Yes, the stackexchange (implicit) model contributes to this. It assumes once a Q has been asked and answered, the issue is resolved. Due to the non-duplicates policy, any corrections or updates are supposed to be added to the same thread. B
51.
by _Gyan_ 6y ago
Direct link to letter: https://www.pfizer.com/news/hot-topics/an_open_letter_from_p...
52.
by _Gyan_ 6y ago
I've never installed that tracker and never been asked to, by clients. Never had a dispute or lost payment. It's mostly about choosing clients with care.
53.
by _Gyan_ 6y ago
Delhi, at least, appears to have around a 5% detection rate over the past month. There was a population-wide serosurvey conducted from Aug 1st to 7th, which resulted in a 29.1% prevalence estimate, and an earlier one from June 27th to July
54.
by _Gyan_ 6y ago
> Are there examples of studies on people testing positive months later? Yes. However, it appears to not be live virus. https://www.medrxiv.org/content/10.1101/2020.07.21.20125138v...
55.
by _Gyan_ 6y ago
There is no ffmpeg av1 library i.e. no native decoders or encoders. ffmpeg has wrappers for libaom and dav1d/rav1e. 3rd party scripts also add wrappers for svt-av1.
56.
India ICMR aims for 15th Aug launch for vaccine(ndtv.com)
1 points by _Gyan_ 6y ago|0 comments
57.
by _Gyan_ 6y ago
A formal news entry isn't up yet. Expect it in a few days.
58.
by _Gyan_ 6y ago
No need to run it twice. Basic syntax is ffmpeg -i video -filter_complex "[0]split[vid][pal];[pal]palettegen[pal];[vid][pal]paletteuse" out.gif ffmpeg 4.0 and later will automatically insert fifo buffers for the main vide
59.
by _Gyan_ 7y ago
There's very little inaccuracy at the outpoint, so it would be 0 to 2.5.
60.
by _Gyan_ 7y ago
ffmpeg -ss $START -i $INFILE -c copy -map 0 -to $END $OUTFILE This is functionally the same as ffmpeg -ss $START -i $INFILE -c copy -map 0 -t $END $OUTFILE FFmpeg normalizes input timestamps unless told otherwise via -copyts.

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