Re: [FFmpeg-user] It appears that FFmpeg is slipping into command mode

direction behavior to indicate the specific filenumber to redirect (e.g. "2> blah" redirects stderr). Try the following: echo "ffconcat version 1.0" >"%JOB%CONCATa1.txt" and see if starts working for you. Devin -- Devin Heitmueller, Senior Software Engi

Re: [FFmpeg-user] dvdsub scaling 'fatness' work around?

mmand line demonstrating what you're trying to do. If you're just passing the dvdsub data through to the MP4 unmodified, then it's entirely possible that it's just the player that doesn't know how to render them over 16:9 video. Devin -- Devin Heitmueller, Senior Software Eng

Re: [FFmpeg-user] dvdsub scaling 'fatness' work around?

would need to change your scaling of the DVD subs to be scaled to preserve the appropriate aspect ratio. Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com __

Re: [FFmpeg-user] ffmpeg and dv

he one is > detects (such as 6/1 fps). IIRC, you would just need to have the command line arg "-r 3/1001" before the "-i" so it gets treated as an input arg. That should override whatever the detected framerate is for the input. Devin -- Devin Heitmueller, LTN Global

Re: [FFmpeg-user] decklink SDI output with subtitles

differently than teletext. > Any timeline for the OP-47/42 support ? Not at this time. I don't have an immediate need for it, but intended to get around to it for my lab use. Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https:/

Re: [FFmpeg-user] decklink SDI output with subtitles

omatic encoder selection failed Default > encoder for format decklink (codec eia_608) is probably disabled. Please > choose an encoder manually. > [sost#0:2 @ 0x55b721f91b40] Error selecting an encoder Output of teletext over the decklink output isn't supported currently. It's on my

Re: [FFmpeg-user] A53 Captions Garbled If Frame Duplication Occurs

ck to do it with "-r" actually doesn't work correctly in a number of cases (e.g. reducing the framerate), and in fact even with upconverting to 59.94 the data doesn't actually conform to the spec, although it works in some decoders (specifically you should have every frame wi

Re: [FFmpeg-user] DTSs & PTSs in MPEG2-TS streams

encourage you to review that portion of the spec before I spend a paragraph explaining why. Not to give away the ending, but SCRs are *never* out of order. And that has nothing to do with fault tolerance. Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Commun

Re: [FFmpeg-user] DTSs & PTSs in MPEG2-TS streams

On Thu, Feb 1, 2024 at 1:55 PM Mark Filipak wrote: > > Hey Devin, > > On 01/02/2024 09.54, Devin Heitmueller wrote: > > Hi Mark, > > > > On Thu, Feb 1, 2024 at 1:15 AM Mark Filipak > > wrote: > >> > >> FFmpeg assigns DTSs & PTSs to P-

Re: [FFmpeg-user] DTSs & PTSs in MPEG2-TS streams

ponds to the #define for AV_NOPTS_VALUE. If you see that value it means that the packet did not have a PTS or DTS value assigned to it and thus you may have to take special measures. Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications

Re: [FFmpeg-user] Force target DTS == source DTS -- How?

her than just being off by 0.7s, but I suspect it's the muxdelay that is causing you to get PTS values which are not what you would expect. Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglo

Re: [FFmpeg-user] Force target DTS == source DTS -- How?

On Wed, Jan 10, 2024 at 1:42 PM Mark Filipak wrote: > > Correction... > > On 1/10/24 13:21, Devin Heitmueller wrote: > > On Wed, Jan 10, 2024 at 12:50 PM Mark Filipak > > wrote: > >> > >> Question: How can I force the target's DTS to be the source&#

Re: [FFmpeg-user] Force target DTS == source DTS -- How?

emuxing unless you specify this option (which is further up the pipeline than your bsf, hence the bsf has no effect). Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin

Re: [FFmpeg-user] Question about random() expression

e 0? From: https://ffmpeg.org/ffmpeg-utils.html "Return a pseudo random value between 0.0 and 1.0. x is the index of the internal variable which will be used to save the seed/state." If you're looking for a value between 1 and N, you can probably just multiply it by N (i.e. N=1000,

Re: [FFmpeg-user] sntsc

s as > 'NTSC' or 'PAL'. FFmpeg > is just propagating that myth. I simply ran across 'sntsc' and asked myself, > "What is that?" Frankly, I think the shortcuts were well-intentioned, but not very well thought out. If you know what you are doing I wo

Re: [FFmpeg-user] sntsc

On Mon, Dec 25, 2023 at 4:04 AM Mark Filipak wrote: > On 12/22/23 16:09, Devin Heitmueller wrote: > > On Fri, Dec 22, 2023 at 3:57 PM Mark Filipak > wrote: > >> On 12/22/23 15:14, Devin Heitmueller wrote: > >>> On Fri, Dec 22, 2023 at 2:38 PM Mark Filipak <

Re: [FFmpeg-user] sntsc

On Fri, Dec 22, 2023 at 3:57 PM Mark Filipak wrote: > > Hi Devin, > > On 12/22/23 15:14, Devin Heitmueller wrote: > > On Fri, Dec 22, 2023 at 2:38 PM Mark Filipak > > wrote: > >> > >> This page: https://ffmpeg.org/ffmpeg-utils.html > >> 

Re: [FFmpeg-user] sntsc

uch thing exists. It's NTSC with square pixels (as opposed to the more common pixel aspect ratio of 10:11 found with 720x480). Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com

Re: [FFmpeg-user] Requesting colormatrix advice

BT.709, but it's possible they simply upscaled it without any colorspace conversion. Because you don't have any reference pattern in the video (e.g. SMPTE colorbars), you'll likely just have to render it in a couple of different combinations, put them side-by-side, and pick the one tha

Re: [FFmpeg-user] 'forcing output' //523971 times

On Fri, Sep 29, 2023 at 5:14 PM Mark Filipak wrote: > On Fri, Sep 29, 2023 at 3:20 PM Devin Heitmueller > wrote: > > You generally can't set the audio PTS in that manner, > > Did I make a mistake? How would you do it? So in general changing timestamps without a very g

Re: [FFmpeg-user] 'forcing output' //523971 times

io timing is on the input stream. Over time the delta between audio/video grows and you'll start to see errors spewed to the console within a few seconds once the delta exceeds a threshold (as well as you'll quickly fall out of A/V sync) Devin -- Devin Heitmueller, Senior Software Engin

Re: [FFmpeg-user] Question for FFmpeg-user list

ple then the luma and chroma are reversed (i.e. YUYV treated as YUVY). If you look at the video and people's skin is blue, then that means the two chroma channels are reversed. Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: htt

Re: [FFmpeg-user] HSV / RGB issue where picture is mostly Pink

appens when you specify a pixel format of YUYV422 but get back UYVY422 or the reverse. Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com

Re: [FFmpeg-user] Using different libavfilter than in ffmpeg-4.4.tar.bz2

s config: Hi Matt, You're probably not going to get help in general on this ML with a third-party ffmpeg tree (in this case mine). ;-) Let me know exactly what ffmpeg tree/version you're currently running and I'll see if I can do a quick backport to that tree. Devin -- Devin Heitmuel

Re: [FFmpeg-user] 608/ 708 Closed Captions output with ffmpeg and Decklink

#x27;ve asked the libklvanc maintainer to close the github issue you opened. Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com ___ ffmpeg-us

Re: [FFmpeg-user] 608/ 708 Closed Captions output with ffmpeg and Decklink

10 "DeckLink SDI 4K" Did you add "--enable-libklvanc" to the ./configure line? That is needed for the libklvanc library to be included in ffmpeg. Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: http

Re: [FFmpeg-user] 608/ 708 Closed Captions output with ffmpeg and Decklink

-708). Regards, Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailm

Re: [FFmpeg-user] ffmpeg scte35

x27;t attempt to address. https://github.com/LTNGlobal-opensource/FFmpeg-ltn/commits/n4.3.1-scte35-smpte2038 Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com

Re: [FFmpeg-user] should I shoot the dog?

nical-reviews/the-chroma-upsampling-error-and-the-420-interlaced-chroma-problem/ > > > > The above article does a really good job explaining the behavior (far > > better than I could do in the one paragraph above). > > I've seen that produce mild combing. I'll

Re: [FFmpeg-user] should I shoot the dog?

er than I could do in the one paragraph above). Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.o

Re: [FFmpeg-user] should I shoot the dog?

#x27;t immediately after the first buffer in the underlying memory. Of course you should never write code that makes this assumption, and perform operations against each plane without assuming the data is adjacent to the buffer for another plane. Devin -- Devin Heitmueller, Senior Software

Re: [FFmpeg-user] should I shoot the dog?

en do conversion if needed, either because you told it to convert it or because you specified some filter pipeline where the individual filter didn't support what format it was being given. See libavutil/pixfmt.h for a list of all the possible formats in which AVFrames can be announced by a c

Re: [FFmpeg-user] KLV in ffmpeg

> > > P Please consider the environment before printing this e-mail. > ___ > ffmpeg-user mailing list > ffmpeg-user@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > f

Re: [FFmpeg-user] SCTE-35 implementation already (bounty)

Frame flags to force a key frame when appropriate. ** ** Note, I haven't actually prototyped this part yet, so don't know if it will actually work or if there are some unexpected gotcha related to what the PTS values are at various points in the pipeline. Devin -- Devin Heitmueller, Senio

Re: [FFmpeg-user] Causes of color bars?

s in its EDID, nor what your camera supports sending. Devin -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com ___ ffmpeg-user mailing list ffmpeg-user@f

[FFmpeg-user] Test, please disregard

Testing. Please disregard -- Devin Heitmueller, Senior Software Engineer LTN Global Communications o: +1 (301) 363-1001 w: https://ltnglobal.com e: devin.heitmuel...@ltnglobal.com ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org

Re: [FFmpeg-user] Use of tee output with codec copy

On Wed, Mar 25, 2020 at 8:05 PM Dennis Mungai wrote: > Many thanks, I'll take a look. > This *might* be related to an issue I've been tracking internally with the > tee muxer. Any further thoughts on this? Regards, Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com

Re: [FFmpeg-user] Use of tee output with codec copy

Hi Dennis, > Could you provide the sample file mentioned in the issue above? Sure, you can download it from here: https://www.dropbox.com/s/rhyn751pru4yagb/foo.ts?dl=0 Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com ___ ffmpeg-

[FFmpeg-user] Use of tee output with codec copy

when going directly to flv but not when using tee, but it's not clear to me where in the code that happens. Any suggestions would be greatly appreciated (I'm happy to provide the foo.ts file if you can't reproduce it with any other ts that has h.264 in it). Thanks, Devin Heitmueller

Re: [FFmpeg-user] ffmpeg -i "`rm -rf /???`" ?

Hi Mark, > So, would you say that the following command is designed to delete all > files & directories, and then to wipe the disk to make it unrecoverable? > > ffmpeg -i "`rm -rf /???`" -lavfi showinfo -f rawvideo -y /dev/sda His point is that the "rm -rf" is being done by the shell before the f

Re: [FFmpeg-user] Sending Data Allow With Video From a MPEGTS stream

On Fri, Feb 21, 2020 at 3:53 PM Tim McClure wrote: > > ffmpeg -re -i IndagoLE.ts -codec copy -f mpegts udp:// > 192.168.1.134:5047?pkt_size=1316 > > > The ts file I am using above has KLV along with video. I am trying to send > the stream to a UDP port with both channels being present however on

Re: [FFmpeg-user] http_persistent not honored when encryption is enabled

On Thu, Feb 20, 2020 at 6:10 AM Valentin Schweitzer wrote: > All tests so far were performed on localhost, but the issue also > occurs when connecting to a Web server in the local network. For what it's worth, I was seeing the same behavior here trying to do HTTP push over TLS to Akamai (i.e. pe

Re: [FFmpeg-user] Where can I find source code?

> I keep winding up here: > git.videolan.org > > Where can I find source code? https://git.ffmpeg.org/ffmpeg.git -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mail

Re: [FFmpeg-user] Crop, Scale, Pad without distortion

On Mon, Jan 27, 2020, 5:05 PM Carl Eugen Hoyos wrote: > > Hans wants to crop black bars so above will not (completely) work for > him... > > Carl Eugen > FWIW, I've done a bunch of aspect ratio conversion based on AFD (including cropping out letterbox/pillarbars and dealing with nonsquare pixels

Re: [FFmpeg-user] ffprobe bug in 'interlaced_frame'?

On Sun, Jan 26, 2020, 11:07 PM Mark Filipak < markfilipak.windows+ffm...@gmail.com> wrote: > Well, whenever I transcode from h262 source to h265 target I invariably > get a reduction of almost 50%. So, why not go with h265? What modern > player doesn't support h265? > Be very careful with this as

Re: [FFmpeg-user] SCTE-35 passthrough in transcoding process

> That’s what we were seeing from our searching as well. I do know that there > are vendors that output cable channels after decryption with a cable card, > with SCTE-35 that are using FFMPEG in the backend code. Silicon Dust with the > now discontinued PRIME units for an example. Does anyone kn

Re: [FFmpeg-user] FFMPEG producing multiple outputs (one streaming and one snapshot)

Hi Thomas, On Sun, Sep 8, 2019 at 9:33 AM Thomas Chen wrote: > > > i am trying to capture video from a camera and produce to two outputs > 1) streaming (h264) > 2) taking periodic snapshot of the image (jpg) > > is this possible ? i read > https://trac.ffmpeg.org/wiki/Creating%20multiple%20outp

Re: [FFmpeg-user] ffmpeg version differences

On Fri, Aug 30, 2019 at 8:57 AM Mehta, Krishnakant wrote: > We are using 'ffmpeg version 2.8.11' library for one of our medical > application running on Cent OS (linux) to convert audio/video streams. > We want to migrate to latest ffmpeg version 4.2 on RHEL8 linux platform. > Kindly let us know

Re: [FFmpeg-user] Overlay performance

On Mon, Aug 26, 2019 at 11:28 AM Darrin Smith wrote: > > Are there any "tricks" to improve the performance of merging an image > (overlay) with a video? > > I have a video snippet (cropped from a larger video) that I then add an > overlay to so additional data is added in the video. The png I use

Re: [FFmpeg-user] FFmpeg DeckLink capture doesn't work

Hi Rik, On Thu, Aug 1, 2019 at 6:56 AM Rik Roukens wrote: > However, I have just found the reason of my problem I was having. > I appears the card had frozen because (i think) I killed one of the capture > processes rather than exiting using [q]. It didn't come to my mind to > reboot my device >