the reported issue? I could offer some sponsorship of
the work so that ffmpeg could once again work with DV?
Kind Regards,
Dave Rice
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0a340] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 31% 54% 11% 1% 1%
1% 0% 1% 0%
[libx264 @ 0x7fdbbaa0a340] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0x7fdbbaa0a340] ref P L0: 68.5% 7.2% 21.0% 3.3%
[libx264 @ 0x7fdbbaa0a340] ref B L0: 58.4% 38.6% 3.1%
[lib
Hi Terje,
> On Feb 17, 2023, at 11:52 AM, Terje J. Hanssen
> wrote:
>
> I ask here for ffmpeg feedback on two capture setups from video tape playback
> to 422 ffv1.mkv in realtime.
>
> Setup 1) HDV playback/HDMI out -> HDMI-USB3/ms2130 capture -> ffmpeg/v4l2 ->
> 422 FHD FFV1/MKV
>
> Accord
could this be related to ticket #8195 "v210
>> encoding clips to 4-1019"?
>
> Ah, probably yes, and yuvtestsrc gives you 0-1023 ramp
This works in ffvhuff and not v210 because ffvhuff is a lossless codec and v210
is lossy (when certain sample values exist) as a selection of
>.
I’m sharing this example here as I’m interested in feedback from this
community on the approach taken, if there would be any concerns about the
potential implementation for Matroska side data or timecode as side data, and
if there are any reactions or recommendations.
Best
onverted to a specific signed 16 bit audio
format. Thus lesser significant bits in video impact the framehash output but
in audio, bit positions >16 don’t have any impact. At the moment ffmpeg doesn’t
appear to have an audio equivalent for the rawvideo format.
Dave Rice
Feel free to share one or several files on Dropbox or a file sharer of
> your choice.
There’s a decent sample set of these files already at
http://samples.ffmpeg.org/A-codecs/MSV/
<http://samples.ffmpeg.org/A-codecs/MSV/>.
Dave Rice
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o Time to
Wait 4 or follow @nttwconf for updates, including registration and a call for
proposals.
Feel welcome to send any questions, comments, or inquiries to MediaArea,
https://mediaarea.net/Contact
Kind Regards,
Dave Rice
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layback environment you’ll likely get a more accurate
reading of the data from the tape.
Dave Rice
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en by ffmpeg, even when mandated (such as
described in TN2162 for uncompressed in QuickTime). You can enable the colr
atom while muxing by adding, -movflags write_colr. It’s been over 4 years since
Vittorio added colr atom support, perhaps time to consider making it enabled by
default.
Dave Rice
nput file #0 (Intensity Shuttle):
Input stream #0:0 (audio): 2428 packets read (124281984 bytes); 2428 frames
decoded (3883812 samples);
Input stream #0:1 (video): 2425 packets read (2262816000 bytes); 2425 frames
decoded;
Total: 4853 packets (2387097984 bytes) demuxed
Output file #0 (TEST_2_pr
rlacement data in the prores encoding, I think you need
to use a combination of the prores_ks encoder with the -flags +ildct+ilme
option.
Dave Rice
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method should not be depending on incoming tc
> signals from external devices but rather rely on the PC clock to determine
> the "exact" capture time of the first frame. If it's feasable.
Perhaps add something like:
-metadata "timecode=$(date +"%T:00")"
> -
; but I have yet to find a solution.
There is a patch regarding this under consideration on ffmpeg-devel. See
http://ffmpeg.org/pipermail/ffmpeg-devel/2018-May/230500.html or subject line
"[FFmpeg-devel] [PATCH] Limited timecode support for lavd/decklink".
Best Regards,
Dave Rice
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code of the website is
available at GitHub [1]. Feel welcome to send any questions, comments, or
inquiries to i...@mediaarea.net.
Best Regards,
Dave Rice
[1]
https://github.com/MediaArea/MediaArea-Website/blob/master/src/NoTimeToWaitBundle/Resources/views/Default/nttw3.html.twig
ters with cluster_size_limit and
cluster_time_limit but is there a way to start a new Cluster for every frame
(or every keyframe) from track 1? Ideally I’d like the Cluster timestamps to be
unique and timed along with the video track or at least to mux in a
> On Apr 9, 2018, at 4:12 PM, Dave Rice wrote:
>
> Hi ffmpeg-user,
>
> I’m using drawgraph with slide=picture in order to make some still images of
> audiovisual metrics upon a timeline. I’d like to use drawgraph and drawtext
> in order to overlay some x-axis markers a
[Parsed_astats_2 @ 0x7f8035500640] Flat factor: 0.00
[Parsed_astats_2 @ 0x7f8035500640] Peak count: 1.00
[Parsed_astats_2 @ 0x7f8035500640] Bit depth: 59/64
[Parsed_astats_2 @ 0x7f8035500640] Number of samples: 512
Best Regards,
Dave Rice
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t you’re naming the output of the signature filter of
the first command as "signature%d.xml” but then the input to the signature
filter in the second command as “signaturev”.
For use of this filter I also recommend this blogpost:
https://ndsr.americanarchive.org/2017/04/20/adventures
output codec settings.
If you know what you want the output to be then you should clarify, otherwise
it leaves the guesswork to ffmpeg which may or may not be want you want.
> Disclaimer: these might be noob questions to some of you, but for me it's
> not obvious, so I would appreciate
> On Jan 11, 2018, at 3:40 PM, Moritz Barsnick wrote:
>
> On Thu, Jan 11, 2018 at 21:11:55 +0100, Nicolas George wrote:
>>> So apparently, ffmpeg is getting some different signal under Linux,
>>> and/or handling it differently.
>>
>> SIGPIPE, obviously.
>
> It was originally obvious to me. Exc
ove command, but if I don’t include a filter_complex
then I get an error:
Output file #0 does not contain any stream
pipe:: Invalid data found when processing input
Thanks much,
Dave Rice
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this so that I can close the player to
stop the process and have a valid file.
I notice that this works:
ffmpeg -f lavfi -i testsrc -f nut - | tee >(ffplay -) | ffmpeg -i -
this_does_work.mov
but this requires two instances of ffmpeg.
Dave R
terminal output rather than only this part. I suspect
your copying an audio encoding from the input to output that QuickTime doesn’t
support, but there’s not enough clues to see that. If re-encoding the audio is
acceptable, then replace -c:a copy with -c:a aac or another audio encoding that
those
tickets; MXF expertise, an AS-07 validator, and more samples would probably be
helpful. Not saying this to volunteer myself, but just to give an idea of
possible steps.
Best Regards,
Dave Rice
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ht
approach, perhaps you could use signalstats to report the average
luma value to see if it's closer overall to the linear 'middle' or the
logarithmic 'middle'.
[...]
Dave Rice
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0.8:0.88:60:0.4,abench=stop
-show_frames
So is there a way to benchmark an A->V filter?
Dave Rice
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-Matroska-Symposium/),
another blog post here
(https://www.beeldengeluid.nl/en/blogs/research-amp-development-en/201607/tools-trade),
and a Storify of our tweets (https://storify.com/ablwr/no-time-to-wait).
Kind Regards,
Dave Rice
#notimetowait co-organizer
> On May 10, 2017, at 2:13 PM, Paul B Mahol wrote:
>
> On 5/10/17, Dave Rice mailto:d...@dericed.com>> wrote:
>> Hi ffmpeg-user,
>>
>> In some cases I've been using -vf and -filter_complex interchangeability but
>> notice that some behavior is unex
> On May 10, 2017, at 11:55 AM, Gyan wrote:
>
> On Wed, May 10, 2017 at 9:08 PM, Gyan wrote:
>
>>
>>
>> On Wed, May 10, 2017 at 8:17 PM, Dave Rice wrote:
>>
>>>
>>> For instance if I use format=yuv422p10le within -vf and within
1kB time=00:00:05.00 bitrate=
1.0kbits/s speed= 771x
video:1500kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing
overhead: unknown
Best Regards,
Dave Rice
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Hi Jim,
> On Mar 22, 2017, at 9:55 PM, jshup...@theppsgroup.com wrote:
>
> Friends,
> 3 Qs
> q1
> I am wondering how I can tell what version of ffv1 a file is encoded with?
>
> I find a ticket 1534
> https://trac.ffmpeg.org/ticket/1534
> that seems to have the same concern
> ffprobe -show_stream
so the decoder error logging would be contained such as
. Otherwise I'd suggest decoding with the
showinfo filter and then searching for the frame info prior to the error output.
[...]
Dave Rice
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>-coder 1 \
>
From running your example command and examining the output via:
ffmpeg -debug 1 -i output.mkv -f null -
The default gop size appears to be 12.
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htt
ny thoughts 'bout how to solve it?
AFAIK s436m stream copying is not supported. Please see ticket 726,
https://trac.ffmpeg.org/ticket/726.
Dave Rice
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. Can anyone provide additional info?
> How is this interpreted by applications? I am using ffprobe version
> N-79546-g13406b6.
IIUC this means that the input file does not explicitly state what the DAR
value is. If you have a PAR value you could calculate DAR from WIDTH
> On May 8, 2016, at 1:40 AM, Francois Visagie
> wrote:
>
>> -Original Message-
>> From: ffmpeg-user [mailto:ffmpeg-user-boun...@ffmpeg.org] On Behalf Of
>> Martynas Brijunas
>> Sent: 07 May 2016 01:29
>> To: ffmpeg-user@ffmpeg.org
>> Subject: [FFmpeg-user] Encoding DV tapes with "datec
do that?
You could also consider using the YDIF values from the signalstats filter. It
will quantify the visual difference in the Y plane from one frame to the next
and thus spike on scene cuts.
Dave Rice
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ore than ffmpeg in certain cases - but I consider
> interlaced/field order
> to be quite fundamental and expected there to be a way to see it that I was
> missing.
I'm guessing here, but I suspect that MediaInfo may be reporting interlacement
information based upon the 'fiel' atom in the QuickTime container. AFAIK ffmpeg
reports on interlacement settings from streams but not from the format.
Dave Rice
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> On Feb 15, 2016, at 6:53 PM, Marton Balint wrote:
>
> On Mon, 15 Feb 2016, Dave Rice wrote:
>
>>> On Feb 15, 2016, at 5:31 PM, Dave Rice wrote:
> [..]
>>
>> Through more testing I realize that this is not a filterchain limit but a
>> limit on th
> On Feb 15, 2016, at 5:31 PM, Dave Rice wrote:
>
> Hi all,
> I have an instance where I’d like to use a really long filterchain but am
> finding that there’s a 1024 character limit to filterchains. Is there a
> method to allow a longer filterchain?
>
> Here is a
,vflip,vflip,vflip,vflip,vflip,vflip,vflip,vflip,vflip,v:
Invalid argument
Yes, I know that I can make the filterchain shorter (obviously with this
example in particular), but I have a complex scenario where the 1,024 character
limit is forcing me to prioritize what to do
://trac.ffmpeg.org/wiki/Encode/H.264>.
Dave Rice
> I have tried to do this using the qscale option, but a warning appears saying
> qscale option is ignored.
> Could anyone give an example command in ffmpeg to achieve this?
> I am running ffmpeg on windows. The version is:
>
> ff
> On Feb 7, 2016, at 4:57 PM, Andy Furniss wrote:
>
> Dave Rice wrote:
>>
>>
>>>> On Feb 7, 2016, at 1:42 PM, Paul B Mahol
>>>> wrote:
>>>>
>>>>> On 2/5/16, Paul B Mahol wrote: On 2/5/16,
>>>>> Dave Ric
>> On Feb 7, 2016, at 1:42 PM, Paul B Mahol wrote:
>>
>>> On 2/5/16, Paul B Mahol wrote:
>>> On 2/5/16, Dave Rice wrote:
>>> Hi all,
>>> I am having trouble creating an mpeg2video output that conforms to 16-235
>>> broadcast range.
video without having values over 235 in the output?
Best Regards,
Dave Rice
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uch as signalstats, cropdetect) applied to the frames?
Best Regards,
Dave Rice
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ar and capture from tape through a black
> magic deckling 4k pro card into a 10-bit YUV (v210).
See the documentation here http://ffmpeg.org/ffmpeg-devices.html#Options-3
<http://ffmpeg.org/ffmpeg-devices.html#Options-3>, particularly the bm_v210
option.
Dave Rice
__
in not going higher, as it is ‘time’.
> For a real world use case, in the old days of tape, a reelname most of the
> time corresponded with the hour.
> So a production with more than 24 tapes needed better administration in reel
> names that had to be written on the tape and box.
> On Dec 30, 2015, at 1:40 PM, Carl Eugen Hoyos wrote:
>
> Dave Rice dericed.com> writes:
>
>> Responding late, as I find myself in need of this
>> filter as well.
>
> Instead, please explain your real-world reason why
> you need the filter:
> Do
> On Dec 30, 2015, at 12:59 PM, Paul B Mahol wrote:
>
> On 12/30/15, Dave Rice wrote:
>>
>>> On Feb 12, 2014, at 4:43 AM, Carl Eugen Hoyos wrote:
>>>
>>> Jim Shupert pps-inc.com> writes:
>>>
>>>> input a unCompressed yuv
> On Dec 30, 2015, at 12:51 PM, Dave Rice wrote:
>
>
>> On Feb 12, 2014, at 4:43 AM, Carl Eugen Hoyos wrote:
>>
>> Jim Shupert pps-inc.com> writes:
>>
>>> input a unCompressed yuv avi and get a second
>>> Uncompressed yuv avi or mov a
Lsize= 192kB time=00:00:00.04
bitrate=39382.2kbits/s
video:192kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing
overhead: 0.154114%
The result of `ffmpeg -i needsbroadcastsafe.nut -vf broadcastsafe
nowbroadcastsafe.nut` would result in the output containing luma val
losslessness. It prevents
finding images like this: https://twitter.com/dericed/status/483626811356893184
<https://twitter.com/dericed/status/483626811356893184>.
Dave Rice
> ffmpeg -i input.avi output06%d -f framemd5 -an framemd5.md5
> _
mpeg.org/wiki/Encode/FFV1
If the file size is a bigger issue than the options used, you could examine the
test suite results at
http://download.das-werkstatt.com/pb/mthk/ffv1_stats/latest/
<http://download.das-werkstatt.com/pb/mthk/ffv1_stats/latest/>. The labels such
as v3c01s4 document the
but according to this post
> <https://ffmpeg.zeranoe.com/forum/viewtopic.php?t=2406>, CC appears as a
> SMPTE 436M data track in MXF content.
Here’s a sample of MXF with a SMPTE 436M track:
http://www.archive.org/download/xdcam_sample_with_caption_track/C0001.MXF
Dave Rice
> Aside from that,
aptions, a corresponding scc file, and the mux result of
captions within xdam.
>> To my knowledge, there are no open source solutions that handle all (if
>> any) of the above situations.
Sounds correct to me.
Dave Rice
>>
for
> the FFmpeg developers?
I started a ticket for SCC caption files at http://trac.ffmpeg.org/ticket/4767
<http://trac.ffmpeg.org/ticket/4767> and supplied an scc file sample along with
an srt file derivative.
Dave Rice
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our example both framemd5 outputs are based on the
same data input. To get framemd5 of both the input and the output you would
need two steps:
ffmpeg -i Sequence.01.mov -f framemd5 Sequence.01.framemd5 -c:v h264 -c:a copy
Sequence.01.mkv
ffmpeg -i Sequence.01.mkv -f framemd5 Sequence.01h26
> On Aug 4, 2015, at 12:17 PM, Kieran O'Leary
> wrote:
>
> On Tue, Aug 04, 2015 at 10:21:30 -0400, Dave Rice wrote:
>> You could try:
>> ffmpeg -i uncommented.mov -map 0 -c copy -metadata comment="your comments
>> here" commented.mov
>
>
> On Aug 4, 2015, at 9:28 AM, Kieran O'Leary wrote:
>
> Hello,
>
> Is there any way to add custom embedded metadata to a quicktime file via
> ffmpeg? In particular, I am hoping to embed a unique ID into each file in our
> collection, which would preferably show up in mediainfo/exiftool/ffprob
ust an idea.
A summary section for signalstats would make sense. As a workaround you could
output from the filter to a csv and then evaluate the csv:
ffprobe -f lavfi movie=file.mov,signalstats -show_entries
frame_tags=lavfi.signalstats.YMIN,lavfi.signalstats.YMAX -of csv > stats.csv
Dave Rice
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same navigation shortcuts
as ffplay. I’d like to play with ffplay, be able to navigate and seek, and pipe
the output to a device.
Dave Rice
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> On Jul 17, 2015, at 10:59 AM, Christian Johannesen
> wrote:
>
> On Fri, Jul 17, 2015 at 2:48 AM, Carl Eugen Hoyos wrote:
>
>> Christian Johannesen gmail.com> writes:
>>
>>> I'm wondering if it is possible to preserve or set
>>> the color_space, color_transfer & color_primaries
>>> in a co
is not detecting the pixel format of your mxf file, you may have to
declare the pixel format before the input.
Dave Rice
> I don't know how to compile the latest source so I took a build from
> http://ffmpegmac.net . I would normally use zeranoe's nightly builds when on
> window
te: playing back only bit 1 of Y, bit 4 of U and bit 5 of V is an
unusual thing to do.
> I've tried to find information on this but I've been coming up short.
It’s all in here:
https://github.com/bavc/qctools/blob/master/Source/GUI/BigDisplay.cpp thou
o-heaac.mp4
<http://samples.ffmpeg.org/A-codecs/AAC/ct_nero-heaac.mp4>
http://samples.ffmpeg.org/A-codecs/AC3/a52dec-streams/zorro
<http://samples.ffmpeg.org/A-codecs/AC3/a52dec-streams/zorro>
Best Regards,
Dave Rice
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checking different files with QCtools. It shows me optical if the values
> are above 235 or under 16. A numerical way would be much better, of course.
> But that is another issue.
QCTools quantifies samples out of the 16-235 range with the BRNG
t which expect to have that type of color space
> as input.
AFAIK ffmpeg only supports linear sampling in dpx. I think support for
logarithmic dpx would be very helpful. For now there's various workarounds with
filters such as haldclut, see: http://trac.ffmpeg.org/ticket/3751.
Dave Rice
&
chunk within an
aXML chunk would be very unusual.
The ffmpeg wav muxer supports bext but does not (yet) support the aXML chunk.
> i am using bwfmetaedit (http://bwfmetaedit.sourceforge.net) to verify bext
> data.
wooo, someone uses that.
Dave Rice
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> On Apr 7, 2015, at 9:38 AM, Moritz Barsnick wrote:
>
> On Mon, Apr 06, 2015 at 20:01:49 -0400, Dave Rice wrote:
>>> On Apr 6, 2015, at 4:32 PM, Pedro wrote:
>
>>> *ffmpeg -y -report -i input.mp4 -vf
>>> "split[a][b];[a]format=gray,histogram=mode
ave]overlay=0:H-h"
> output.mp4*
Maybe unrelated, but you're forcing [a] to grayscale and then splitting that to
[c] and [d], then using geq to extract red from [c] and green from [d]. Taking
red and green from a grayscale image should give the same result. Can you
explain what you ar
s undetermined or as tff?
Dave Rice
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ank you, thats a very good tool, especially graphics magick :)
>
> But I can find just one frameratein the list:
>
> dpx:mp.frame.rate
>
>
> Where is the second one you were talking about?
You can identify the source of the frame rate with a bit more clarity with
mediainfo if
> On Mar 12, 2015, at 7:30 PM, Reuben Martin wrote:
>
> On Wednesday, March 11, 2015 06:43:11 PM you wrote:
>> On Wednesday, March 11, 2015 07:19:14 PM Dave Rice wrote:
>>>> I’ve used bmdtools and piped it to ffmpeg for quite a while, and they
>>>> work
&
ecify input devices for
> audio and video separately?
Yes both video and audio is implied in one decklink input.
> I’ve used bmdtools and piped it to ffmpeg for quite a while, and they work
> fine.
> I’m just curious about trying to access it directly.
Same here, though I still use bm
> On Mar 9, 2015, at 4:05 PM, Carl Eugen Hoyos wrote:
>
> Dave Rice dericed.com> writes:
>
>>>> As far as I tested I can say (for the
>>>> ffv1-supported pixelformats "gbrp10le" and
>>>> "gbrp12le") it works lossless. A
Hi Carl,
> On Mar 9, 2015, at 9:24 AM, Carl Eugen Hoyos wrote:
>
> Christoph Gerstbauer gmail.com> writes:
>
>> As far as I tested I can say (for the
>> ffv1-supported pixelformats "gbrp10le" and
>> "gbrp12le") it works lossless. All FrameMD5s
>> are equal:
>
> (This is not the first time
> On Mar 8, 2015, at 5:48 PM, Carl Eugen Hoyos wrote:
>
> Jason Reeves hypermediastudios.com> writes:
>
>> I am having the exact same issue that Dave was having.
>
> If I could just remember which issue Dave had...
When I run make with --enable-decklink the make fails at:
u813s:ffmpeg rice$
rtunately I can't remember what
amount of outliers was tolerated or what the spec was.
The output of
ffprobe -f lavfi movie=INPUTFILE.mov,signalstats="stat=brng" -show_entries
frame_tags=lavfi.signalstats.BRNG -of flat
may be easier to parse
asible at this point but I wonder how feasible it would be
to pull the metadata values into expressions in the select filter.
A dream:
ffmpeg -i mixed.avi -vf signalstats,select='gt(lavfi.signalstats.SATAVG\,0)'
-c:v libx264 color_frames_only.mp4
Best Regards,
Dave Rice
> Thanks,
&g
t (which I think in this case
is yuv422p10le). Little endian formats will not be presented as big endian
without requesting it. To match your expectations use -pix_fmt yuv422p16be.
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Hi Christoph,
> On Jan 23, 2015, at 8:39 AM, Christoph Gerstbauer
> wrote:
> Am 23.01.2015 um 13:57 schrieb Dave Rice:
>> On Jan 23, 2015, at 5:23 AM, Christoph Gerstbauer
>> wrote:
>>
>>>> The YDIF value in the signalstats filter could show this.
>
s you're looking for.
Another option could be using the geq filter with if statements which would
replace U and V values with black if in those numerical ranges, then adding
blackdetect next in the filterchain.
Dave Rice
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trying to achieve? And why?
Just to be picky, the WAV container can contain compressed audio data so if pcm
is not needed, one could control a lossy bitrate if using a lossy codec that
WAV supports. Not sure if ffmpeg supports any lossy codec in W
zing filter 'movie' with args
> 'C:ffmpegbinDETECT_CUTS.mov'
> movie=C:\ffmpeg\bin\DETECT_CUTS.mov,signalstats: No such file or directory
Is C:\ffmpeg\bin\DETECT_CUTS.mov an actual file on your machine?
Also your build is old. Do you see signalstats when running 'ffmpeg -filters'?
Dave Rice
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Hi Christoph,
> On Jan 22, 2015, at 3:18 AM, Christoph Gerstbauer
> wrote:
>
> Hello
>
> Is it possible to detect cuts with ffmpeg by using a DYNAMIC threshold?
The YDIF value in the signalstats filter could show this.
ffprobe -f lavfi movie=DETECT_CUTS.mov,signalstats -show_entries
"frame_t
ding bits are discarded
and could then be considered to throw off a compression rate analysis. For
instance a 320x240 frame in v210 would be 215,040 bytes but only 192,000 of
those bytes are non-padding data. Thus the v210 padding may through off your
compression test by about 12%. (please co
al videotapes also decode to 8 bit but are received over 10 bit SDI
so this same process can be used to verify if the SDI contains actual 10 bit
video or some amount of padding.
Best Regards,
Dave Rice
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IsDeckLinkAPIPresent (void)
^
/usr/local/include/DeckLinkAPIDispatch.cpp:157:6: error: no previous prototype
for function 'InitBMDStreamingAPI' [-Werror,-Wmissing-prototypes]
void InitBMDStreamingAPI(void)
^
libavdevice/decklink_common.cpp:83:39: error: cannot initialize a parameter of
type 'CFStringRef *' (aka
ile must be specified
Any idea what I’m doing wrong?
Dave Rice
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> On Nov 20, 2014, at 4:44 AM, Carl Eugen Hoyos wrote:
>
> Dave Rice dericed.com> writes:
>
>> CXX libavdevice/decklink_common.o
>> error: invalid argument '-std=c99' not allowed with 'C++/ObjC++'
>> make: *** [libavdevice/decklink_comm
evice/avfoundation.o
CXX libavdevice/decklink_common.o
error: invalid argument '-std=c99' not allowed with 'C++/ObjC++'
make: *** [libavdevice/decklink_common.o] Error 1
Thanks,
Dave Rice
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ary ebur128 meters:
ffplay -f lavfi
"amovie=stereo.mp3,channelsplit[a][b];[a]ebur128=video=1:meter=18[a1][out0];[b]ebur128=video=1:meter=18[b1][out1];[a1]crop=20:432:612:40[a2];[b1]crop=20:432:612:40[b2];[a2][b2]framepack[out2]”
From here you could use drawbox and
de + 1417
10 libSDL-1.2.0.dylib 0x000104283f71
SDL_SetVideoMode + 906
11 libavdevice.56.dylib0x000102f4ad71
avdevice_free_list_devices + 10775
)
libc++abi.dylib: terminating with uncaught exception of type NSExcept
PLAY to
DECODER->CHECKSUM.
> Anyhow, how can a set the LOSSY encoding in libopenjpeg? via "-b:v" or "-q”?
IIRC the libopenjpeg encoder/decoder in ffmpeg only supports lossless encoding.
> I want to know all encoding/decoding paramaters of the libopenjpeg cod
er note for ffv1 for preservation is its self-descriptiveness. FFv1
version 3 maintains information about field dominance, sample aspect ratio, and
pixel format within the codec whereas jpeg2000 is moreso dependent on standards
like SMPTE422M and the container. FFv1 ve
gt; and should make significantly less trouble than the so-called "professional"
>> solutions you are being offered.
>
> Do you mean "ffv1 is faster/compresses better than libopenjpeg" or
> "ffv1 is faster/compresses be
This was done because as the commit note says the jpeg2000 encoder/decoder
"mostly doesn't work".
To build an ffmpeg as Carl suggests, run `brew edit ffmpeg`, and delete this
line `args << "--disable-decoder=jpeg2000"`.
Dave Rice
> Thank you
>
&g
-threads
> 0 -acodec pcm_s16le -vcodec ffv1 -level 3 -coder 1 -context 1 -g 1 -slices
> 24 -slicecrc 1 -vsync 0 -report "C:\\Digital Weekend
> Videos\\helen\\testing\\nokia1_FFV1.MOV"
Have you tried putting -vsync 0 before the input?
Dave Rice
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