Re: [FFmpeg-user] (no subject)

Hi, > Good afternoon, sorry that it took so long to update this thread, well I am > still trying to use uar ffmpeg in my own way, but it seems that everything is > going against me, now the problem is that if I try to compile in windows the > process seems to be it carries out but then it

Re: [FFmpeg-user] Cannot find a matching stream for unlabeled input pad 7 on filter Parsed_concat_2

Hi, > Sorry Nicolas, but I think I am still confused. I changed it to 16 and > get the same error so I am thinking I am not understanding. The concat filter should have [# of segments] × ([# of audio streams] + [# of video streams]), or n × (v + a) as specified to the filter. You seem to have

Re: [FFmpeg-user] sudo: ffmpeg: command not found

Hi, Maybe I wasn’t being clear, I meant run the configure script without any arguments, since I don’t know if gnutls is the only missing requirement. Regards, Ted Park ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org

Re: [FFmpeg-user] Cannot find a matching stream for unlabeled input pad 7 on filter Parsed_concat_2

Hi, > Can you please elaborate on the (1+1) part? > I see here https://trac.ffmpeg.org/wiki/Concatenate > > that n=x where x is the number of input segments Since there is a video stream and an audio stream in each segment (1+1), for 4 segments there should be 8 inputs. Regards, Ted Park

Re: [FFmpeg-user] sudo: ffmpeg: command not found

Hi, Does that search the current directory with gnu find? I thought you need to do find . -type …. I just noticed your configure script failed. I (and probably everyone else too) assumed that you successfully built ffmpeg and had ffmpeg_g, etc. in /home/marc/ffmpeg_build because you said you

Re: [FFmpeg-user] ffplay with Havision Makito X video encoder, H.264 stream, and "intra refresh" option enabled

Hi, > It was suggested here that I "attach a file" but I'm not sure how that > can be done with FFMPEG since it's unable to decode the video it > doesn't seem to write anything to a file when you try to record the > stream. I don’t know about the issue you’re describing but I think nc (or it

Re: [FFmpeg-user] sudo: ffmpeg: command not found

Hi, > Am a novice. That’s a really bad reason tbh. ~/bin/ffmpeg will probably work if $HOME/bin isn’t in your path. Regards, Ted Park ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To

Re: [FFmpeg-user] Issue with combining mp4 audio file and an image

Hi, > Here is the error I am getting: > > > Stream specifier ':a' in filtergraph description > [0:v]setsar=1[v0];[1:v]setsar=1[v1];[v0][1:a][v1][2:a]concat=n=4:v=1:a=1 > matches no streams. Your input #2 is a jpeg. Regards, Ted Park ___

Re: [FFmpeg-user] sudo: ffmpeg: command not found

Hi, It looks like you installed to $HOME/bin, many systems (I think most Debian based) restrict sudo PATH to “secure” directories. Why do you need sudo anyways? Regards, Ted Park ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org

Re: [FFmpeg-user] how to burn subtitles and transcode live stream

Hi, > Thank you for your email. I have tried but i can't manage to both scale and > burn the subtitles if i try to only burn them with filter_complex it works > or if i try to scale only it works too but chaining them doesn't work. You need to scale after the subtitles, they have a set size too.

Re: [FFmpeg-user] ffprobe/ffplay ERROR :: Could not find codec parameters for stream 0 unspecified pixel format,

Hi, > I did install version 4.3.1 on Linux MINT: > > > ffprobe version 4.3.1 Copyright (c) 2007-2020 the FFmpeg developers > built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04) > configuration: --disable-x86asm > > > I still got the same error. The mp4 files do not run anywhere. W10, Linux >

Re: [FFmpeg-user] [hls] keepalive request failed

Hi, >> ffmpeg -fflags +igndts -i >> "https://vod-kijk2-prod.talpatvcdn.nl/GIEBboXaKkD/3bf69d5f-da4f-7756-7e3d-ad8d1295f936/GIEBboXaKkD-index.ism/GIEBboXaKkD-index-audio=16-video=3031502.m3u8; >> -i "https://vod-kijk2-prod.talpatvcdn.nl/webvtt/760978E1.vtt; -c copy -c:s >> srt "output.mkv"

Re: [FFmpeg-user] how to burn subtitles and transcode live stream

Hi, > Who can I write to for help? Assuming it’s about the FFmpeg command line tools you’re on the right list. Regards, Ted Park ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe,

Re: [FFmpeg-user] Problem in v360?

Hi, > After a deeper look into the quaternion multiplication, it seems to be > correct. The terms are only written in a different order in the Wikipedia > article. > > But it's a fact that the v360 rotations are broken, as can be shown by this > simple test: > You can use any equirectangular

Re: [FFmpeg-user] Overlay Error reoccurring

Hi, > Its John again, I followed your Guidance and changed a bit of the code but > I am still getting an error of Unable to find a suitable output format for > 'box=1:shado etc etc I thought that was just in the email, there shouldn’t be any whitespace after the colon before box. You could

Re: [FFmpeg-user] ffmpeg does nothing but using CPU

Hi, >> just remove the redirection and look how to avoid that situation > > Nope, I just added -nostdin. But doesn’t that redirection just count as that process having another file open? I think with ionice -c3 it might make a difference, unless -nostdin also is silent Regards, Ted Park

Re: [FFmpeg-user] ffprobe/ffplay ERROR :: Could not find codec parameters for stream 0 unspecified pixel format,

Hi, > I have a set of mp4 files, which can`t be handled via ffplay/ffprobe. Try a recent version, you can easily download static builds if you don’t want to compile on your own, package manager stable version is usually years old, I think

Re: [FFmpeg-user] Overlay Error reoccurring

Hi, > I am not sure if I have the overlay code in the correct position or should > I be adding it to the "-filter_complex "[0:a][1:a]amerge=inputs=2[a]"" as > an additional Item. I think that would be the cleanest way, separated by a semicolon. And you could get rid of the output pad label and

Re: [FFmpeg-user] ffmpeg audio encoding

Hi, > i have a question what is the recommended way for transcoding only audio > and keep video as is. > > I tried this with command: > ffmpeg -n -i something.mkv something_else.mkv -map 0 -vcodec copy -scodec > copy -acodec ac3 -b:a 640k > > The thing is that using this command with a 10+GB

Re: [FFmpeg-user] ERROR: srt >= 1.3.0 not found using pkg-config

Hi, > I can't get past the error ERROR: srt >= 1.3.0 not found using pkg-config > > > > Has anyone found where it is coming from?? Log file attached but it > does not seem to add anything to the party That’s not the only problem, can you run configure at all, with no options? Regards,

Re: [FFmpeg-user] Converting text to video for dictation

Hi, >> typography effects based video > So that one is basically what I'm looking to do with ffmpeg - turn a > subtitle file (of any type) into a transparent backgrounded (?) video for > use in my video editor to combine the necessary contents together - or some > other file/method that

Re: [FFmpeg-user] Converting text to video for dictation

Hi, > So, I'm a person that makes videos and dictates them via text elements. My > video editor makes this tedious. Is there a way to make this process faster > with ffmpeg (probably like a subtitle file into a video with text in the > middle?) I’m confused as to what you mean, are you asking

Re: [FFmpeg-user] Which graphics card for FFmpeg + Linux?

Hi, > I've searched the web for infos about which graphics card/GPU to get for > using FFmpeg's hardware encoding/decoding features, but the results where > either heavily dated or unclear. > If someone can point me at something, I'd be very grateful :) > > Sorry if this has been asked a

Re: [FFmpeg-user] ffplay struggling with this station!

Hi, I just realized that the station was public, so I just tried: % ffplay -nodisp -vn "https://jrtv-live.ercdn.net/jrradio/englishradiovideo.m3u8” no issues. > I did try without that buffer flag, but that had no effect. I’m going to try > updating ffplay, and see if that helps. Yeah also

Re: [FFmpeg-user] "cookies" option doesn't seem to work.

Hi, > I'm trying to set cookies for a HLS request. > >> ffmpeg -v 99 -cookies "test=blabla;" -i > https://del.thumva.com/hls/20200621-0005-05/index_1.m3u8 > > But the request doesn't actually include my cookie: See docs for http in ffmpeg-protocols. > At the very least, each cookie must

Re: [FFmpeg-user] ffplay struggling with this station!

Hi, > I use the following command to play the station: > $ ffplay -nodisp -vn -fflags nobuffer -fflags discardcorrupt -flags low_delay > https://jrtv-live.ercdn.net/jrradio/englishradiovideo.m3u8 I think “-fflags nobuffer” tells ffplay not to buffer? So there will be nothing to play every

Re: [FFmpeg-user] xfade filter - custom expressions

Hi, > "XY - The coordinates of the current sample." - Is the transition defined > by selecting a color/state for each pixel? > > "WH - The width and height of the image." - OK. > > "P - Progress of transition effect." - Looking at the source, this is a > float. Ranging from 0-1 I assume(?) > >

Re: [FFmpeg-user] 5% of audio samples missing when capturing audio on a mac

Hi, >> 48000 is certainly a much nicer number when you compare it with the common >> video framerates (24, 30/1.001, etc. all divide cleanly) > > Can you explain this? I'm trying to get (30/1.001) or the rounded 29.97 to > divide 48k cleanly or be a clean ratio but I don't see it. Maybe that

Re: [FFmpeg-user] HLS stream delivery problem

Hi, > Do you know how to fix this? > This is my code with ffmpeg, Y:\ is drive letter to the HLS server > (WebDAV) WebDAV is good for lightweight collaboration for old school workgroups like maybe wiki pages. It’s basically lots of http requests to simulate a locally mounted drive, maybe

Re: [FFmpeg-user] bwdif filter question

Hello, >> I'm not entirely aware of what is being discussed, but progressive_frame = >> !interlaced_frame kind of sent me back a bit, I do remember the discrepancy >> you noted in some telecopied material, so I'll just quickly paraphrase from >> what we looked into before, hopefully it'll be

Re: [FFmpeg-user] bwdif filter question

Morning, > Regarding 'progressive_frame', ffmpeg has 'interlaced_frame' in lieu of > 'progressive_frame'. I think that 'interlaced_frame' = !'progressive_frame' > but I'm not sure. Confirming it as a fact is a side project that I work on > only occasionally. H.242 defines "interlace" as solely

Re: [FFmpeg-user] Create lossless PNG compressed avi video - not MPNG - for ImageJ

Hi, >> ... error in ImageJ: "Unsupported compression: 474e504d 'MPNG' in line 16” > > ffmpeg -i input -vcodec png -vtag "PNG " out.avi I'm just curious, do you know if MPNG a thing, like can you use it instead of original magic bytes and have a series of png's to animate it? Regards, Ted Park

Re: [FFmpeg-user] 5% of audio samples missing when capturing audio on a mac

Hi, Now that I try it, it works fine for some random number of seconds, then stops. Sometimes 3, sometimes 300. Something that comes to mind is that Mojave release notes had something about a new model for security as it pertains to mic input (like to prevent a mac version of a "wiretap" type

Re: [FFmpeg-user] Problem about duration value of converted mp3 file

Hi, > Does anyone know anything about it? > I use the 96k option, but a difference of about 1s remains. > The file size is large, so I want to use it with more compression, but I > cannot apply it. >> The contents requested for confirmation have been retested and confirmed. >> This is the result

Re: [FFmpeg-user] Pixel format: default and filter?

Hi, > How can I determine the pixel formats that ffmpeg has chosen for the filters' > input and output pads? I'm not sure "chosen" is the best way to describe it, but inserting the showinfo filter will print the format of each frame at that point in the filterchain. But as format conversions

Re: [FFmpeg-user] Pixel format: default and filter?

Hi, > ffprobe now reports out.mov being yuv420p. Is this an implicit conversion to > a lower bit depth? It's just the default output format for overlay. It's commonly used for stuff across colorspaces (like yuv420p video and argb png logos overlaid) especially with alpha. You can set format

Re: [FFmpeg-user] 5% of audio samples missing when capturing audio on a mac

Hi, You know it's confounding, I couldn't get avfoundation audio input to work at all, and then tried a bunch of options to get to the weird issue you describe (which I thought was maybe something to do with the clock source being different) but then I went back to supplying no extraneous

Re: [FFmpeg-user] rav1e encoding only using one core

Hi, > I'm playing around with rav1e and noticed in my first test that only one > core is used of the 8 (16 virtual) I have. I tried with and without > -threads setting. Since most other codecs behave this way I was expecting > it to use as many cores as possible if not constrained by the command

Re: [FFmpeg-user] Error messages when generating ProRes from 16-Bit TIFF

Hi, I only have a generic suggestion to offer; as always, try updating to the current code, or a nightly build. > Log: > > ffmpeg started on 2020-09-10 at 14:21:31 > Report written to "ffmpeg-20200910-142131.log" > Log level: 48 > Command line: > "C:\\Temp\\ffmpeg\\bin\\ffmpeg.exe" -report -i

Re: [FFmpeg-user] Problem with time-lapse

Hi, > ffmpeg -i /mnt/ramdisk3g/workdir/%d.jpg -r 120 -vcodec mpeg4 -qsale 1 -y > -filter:v " setpts=0.23*PTS"'' /mnt/ramdisk/mp4/ > > And the result is this > https://drive.google.com/file/d/1acRm7vWwJAXz1jEU66nuD7Db9mrtPuz-/view?usp=sharing > > In workdir i have multiplied every image 6 times

Re: [FFmpeg-user] Output to S3

Hi, >> Is setting up a sort of proxy server that will intermediate and upload >> to s3 an option? > It might be the option, but it will be the last option I'd like to accept. > I'm seeking for more simple solution. > I'm afraid that I'll stuck on sending a video to that server too. Is the

Re: [FFmpeg-user] Unable to play or import video files in an app that uses ffmpeg

Hi, > Issue: For me specifically on my Windows 10 PC, these video playback and > import features do not work. When I select a video to play, nothing happens > (the app is supposed to have an inner window that displays the playback but > that is non-existent when I hit play). Perhaps some

Re: [FFmpeg-user] Problem with time-lapse

Hi, > I'm trying to automate time-lapse video from still images. I have all sky > camera that captures around 200 images / night. I've managed to do videos > like this > https://drive.google.com/file/d/1yyihZNypBy0r5y_JJiTHgtvc8N1RAZ3e/view?usp=sharing Timelapse can be counterintuitive

Re: [FFmpeg-user] I can't copy or embed a picture to an output audio (A-A conversion)

Hi, > ffprobe -hide_banner -show_streams /Users/home/Music/iTunes/iTunes\ > Media/Music/Black\ Sabbath/Born\ Again/01\ Trashed.aiff — the command > > ##Result: > > Input #0, aiff, from '/Users/home/Music/iTunes/iTunes Media/Music/Black > Sabbath/Born Again/01 Trashed.aiff': ... > Duration:

Re: [FFmpeg-user] Output to S3

Hi, > I can't rely on "aws s3 cp", since it can be not installed on a machine > where I will run ffmpeg. Is setting up a sort of proxy server that will intermediate and upload to s3 an option? > Do you know what this error means ? > [image: image.png] That is a very small window of view into

Re: [FFmpeg-user] ffmpeg http filter?

Hi, > ffmpeg -i test.jpg -vf format=rgb24,http=localhost:8080 -y out.jpg I don't think it's possible using filters, or with a single invocation like that. (The 'http' filter is hypothetical and just meant for illustration right?) Depending on how you're connected to the server, I think pipes

Re: [FFmpeg-user] Convert DNG

Hi, >> I'm working in an Archive where we digitize analog movies. Our master-files >> are usually DPX but now we get a new scanner which save the movies in DNG >> files. Is there a possibility to convert de DNG files with FFMPEG to DPX >> files > > Do you mean CinemaDNG? That's not the same

Re: [FFmpeg-user] "interlace"

> I have great respect for you, Ted. Tell me: What is interlaced video? Well that is unwarranted, possibly spiteful, even, to someone as insecure as me ;) That is the real question isn't it. Probably won't be very satisfying but I'll try to describe it. Probably not useful to say it's video

Re: [FFmpeg-user] "interlace"

Hi, > In the case of "interlace": > "It's interlaced video" -- video in which the lines alternate (i.e. are > interlaced) between two (or theoretically, more) fields (e.g. > odd-even-odd-even...). That employs the past participle of the verb, > "interlace", as an adjective to modify "video". >

Re: [FFmpeg-user] ? About ffmpeg's prores implemention

Hi, >> I'm not sure what you are referring to, what's there to spread fud about?? > > Closely read your text that you removed out. You're reading into it too much if it provoked fear or uncertainty in your mind, wasn't my intention. >> What is, AME or one of the prores encoders included in

Re: [FFmpeg-user] Ghostly audio stream.

Hi, Is there a file with the same name or similar (with "-2" appended or something) in the same dir? Maybe you confused which is which? As for how to prevent, currently the default is to not load external audio files so updating ffmpeg and mpv might be an option. Regards, Ted Park

Re: [FFmpeg-user] HLS remote playback

Hi, > Now, how can I open that file and watch the stream on my laptop with the VLC? > Do I need some NGNIX or Apache server or FFMPEG can do the job? Yes, HLS stands for http live streaming, you will need to serve the files over http somehow. Doesn't have to be apache or nginx, I think there's

Re: [FFmpeg-user] build error at libavformat/udp.o

Hi, >> d. Android NDK version : r16 > > The issue is (for example) not reproducible with r19b here. It turns out this is the crux of the problem, android idiosyncrasy in its c library. Actually the error was describing the exact problem, ip_mreq_source struct is defined differently.

Re: [FFmpeg-user] Problem about duration value of converted mp3 file

Hi, > When converting a wav file to MP3 using the default option, an error occurs > in the length. > Converted using the following command > > ffmpeg.exe -i 1.wav 1.mp3 > > The duration of the original wav is 1:09:30, but the length of the > converted MP3 is 1:07:16. > The length of the file

Re: [FFmpeg-user] build error at libavformat/udp.o

Hi, > 3. When I tried to use FFmpeg 4.0.6, I do not have any problem to build it. I > have even done simple smoke test successfully for our final product. Are you saying with older source, following the same steps gives you functional output? I thought you were trying to configure the build

Re: [FFmpeg-user] ? About ffmpeg's prores implemention

Hi, > Again just typical FUD from same person. I'm not sure what you are referring to, what's there to spread fud about?? > It is obviously slower, hahaha. What is, AME or one of the prores encoders included in FFmpeg? I mean obviously it'd depend on the job and hardware but for what it's

Re: [FFmpeg-user] Hoping to make multiple input seeking outputs based on a text file (inspired by concat)

Hi, > Seems like a very simple script to do this. IMHO, this type of task shouldn't > be built into ffmpeg. It seems to me that is the prevalent opinion. Why is that? To exhume a dead horse and start beating it again, the jumbled up program streams in a DVD's VOB transport streams require

Re: [FFmpeg-user] ? About ffmpeg's prores implemention

Hi, > After more research, I’ve found that the two other encoders that I have which > write Prores create files that Afterburner recognizes as Prores and plays > them in real time. Unfortunately ffmpeg’s Prores isn’t recognized as such by > the Mac and I’ll have to switch to AME for this

Re: [FFmpeg-user] error avformat_open_input

Hi, > and the video its in the same path that the project. I don't think that's the issue, because the error description says: > ... unresolved external symbol "int __cdecl avformat_open_input(struct > AVFormatContext * *,char const *,struct AVInputFormat *,struct AVDictionary * > *)" >

Re: [FFmpeg-user] Some questions about PTS

Hi, > Let's assume the framerate is constant. For example, I want to delay a video > by 5 frames and then hstack the original video and the delayed version: > > ffmpeg -i test.mp4 -vf "split[a][b];[b]setpts=PTS+5/(FR*TB)[c];[a][c]hstack" > -y out.mp4 I would try tpad=start=5, but I'm not

Re: [FFmpeg-user] Some questions about PTS

Hello, I am not confident about this info but I've always thought the timebase is usually the reciprocal of the framerate *or smaller*. As in, the duration of a frame can be represented accurately enough as the difference between the timestamps, which aren't counted using seconds, but "ticks"

Re: [FFmpeg-user] ? About ffmpeg's prores implemention

Hi, ProRes is proprietary, Apple actually calls FFmpeg out on having an unlicensed implementation: > Using any unauthorized implementation (like the FFmpeg and derivative > implementations) may lead to decoding errors, performance degradation, > incompatibility, and instability. But you

Re: [FFmpeg-user] FFmpeg distribution help

Hi, > We have developed software that requires the distribution of FFmpeg > (included in the download). Our intention is to sell the software. > Who do I contact to inquire further about how to proceed regarding > permission, royalties, fees etc.? Run ffmpeg -L to see which license is

Re: [FFmpeg-user] WavPack to PCM?

Hi, > Is there a way to convert WavPack format to PCM using ffmpeg? If you just re-save as wav, I think the default is pcm 16bit. i.e. ffmpeg -i input.wav output.wav Regards, Ted Park ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org

Re: [FFmpeg-user] dshow questions

Hi, > Is -vcodec in this case an undocumented option of the dshow input device? I > ask because it's written before -i. > Or is it an option for the output, and could (or should?) be written before > the output file? I think it's not documented because it's deprecated, ultimately it's

Re: [FFmpeg-user] ffprobe

Hi, > I am using ffprobe to calculate stream bps, with RTSP every thing work fine, > with RTP , I need to add sdp file, I have one but couldn’t find how to tell > ffprobe to use it : > > Ffprobe -show_frames -rtsp_transport tcp rtsp://192.168.168.201/11 > - work fine > Ffprobe

Re: [FFmpeg-user] Ffmpeg issues multiple HTTP requests when starting a video from a URL

Hi, > There is no attempt to seek the video on the command line. The server returns > HTTP/1.1 206 Partial Content initially and ffmpeg then tries to get data at > different offsets before it prints "All info found" and proceeds with the > conversion. Multiple connections cause an additional

Re: [FFmpeg-user] How do I increase the playback size of a video without rescaling it?

Hi, > On Jul 16, 2020, at 08:39, Moritz Barsnick wrote: > > On Thu, Jul 16, 2020 at 07:22:39 -0500, fowman wrote: >> No, I have the same on all three. > > Ah, okay. *All* you players are able to scale the 720x576 video to > fullscreen (automatically?), and *NONE* of them manages that with the

Re: [FFmpeg-user] copy encoder settings for cycling platform

Hi there, > The Videos a very big and after uploading the Platform will re-encode it to a > small but well working file > > I wont upload big files which they reduce from eg. 17GB to 4GB, but i dont > wont upload it in a lesser quality than they re-code > > This mean i want upload it in the

Re: [FFmpeg-user] Question about licencing

Hi, > Can we use ffmpeg for our demo without breaching any licence. > > What documentation do I need to include on Git to ensure that users are > aware that they are using FFMPEG and need to adhere to the licencing of > that product. > > Is there anything else we need to do to ensure that we

Re: [FFmpeg-user] How to analyse?

Hi, Take a look at the silencedetect filter. Regards, Ted Park ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject

Re: [FFmpeg-user] Text quality (credits etc) in h264

Hi, > Normally I encode to a size of width 352 keeping aspect ratio, encoding to > 704 is better, but obviously far bigger files How many characters to fit in the frame? Those numbers are like something on my old gameboy... If increasing the width from 352 to 704 pixels is too expensive

Re: [FFmpeg-user] Text quality (credits etc) in h264

Hi, > Are there any tips to maintain the quality of text in output files. > For example credits or slides in zoom videos. If mostly static text, or maybe for the credits, low constant motion, is most of the video content, I think multi-pass encoding would be beneficial. Or if you do not care

Re: [FFmpeg-user] question about fps filter

Hi, > The output file is how I noticed the issue it was reporting original frame > rate as 24000/1001 and current frame rate as 3/1001. I see, that's weird. This only happens with yadif_cuda, not yadif right? Is there a change if you hwdownload before fps filter (other than time)? Regards,

Re: [FFmpeg-user] Converting zoom recordings

Hi, I might be wrong but it looks like the example you uploaded is from a session with at least two files, maybe the other named similarly but ending with _02 (or maybe it is incomplete and the next part wasn't saved). I think it is sample buffers serialized, knowing what it is a recording of

Re: [FFmpeg-user] question about fps filter

Hi, > I found this in the debug output and am not sure why it sees what was > passed by the command line but then is ignored in the filter graph can > someone help me understand please? The complete debug output is available > but too big to include here. > > [Parsed_yadif_cuda_0 @

Re: [FFmpeg-user] Problem with colorhold filter

Hi, I think this might have been a typo? in vf_colorkey.c:48 the "diff" isn't normalized to 0 - 1, but to 0 - 3. double diff = sqrt((dr * dr + dg * dg + db * db) / (255.0 * 255.0)); changing it to double diff = sqrt((dr * dr + dg * dg + db * db) / (3 * 255.0 * 255.0)); seems to fix it for me.

Re: [FFmpeg-user] Newbie needs help on capture video/audio using ffmpeg on RPI

Hi, > you are not setting up the /dev/video0 input correctly see > > > > Let the camera/capture card to the encoding and save stream with -c:v > copy -c:a copy It doesn't look like that's an option,

Re: [FFmpeg-user] FFmpeg single threaded bottleneck

Hi, Some values don't look right, try getting rid of them. -thread_queue_size seems arbitrary, it is queue length, not bytes -indexmem seems arbitrary, pretty sure default value is bigger -rtbufsize 2147.48M is kind of abusive, especially for the audio inputs I don't think you should

Re: [FFmpeg-user] Subtitle metadata

Hi, > Hi, I'm seeing a change in the way FFmpeg handles metadata options, > particularly for subtitles. I can't say when and which version cause it to > change. > > FFmpeg now appears to ignore the "-disposition:s:s:0 none" option which I > would previously use to copy but not display

Re: [FFmpeg-user] Drawtext specific date and time with replay

Hi, > Thank’s for reply. Yes I try it and it works fine but with this argument > (Timecode), it’s going back to 00:00:00:00 when you seek and this is exactly > that I don’t want. Oh, I did not know this happened, it sounds like a small bug? Then I suppose you could add setpts=PTS-STARTPTS

Re: [FFmpeg-user] Drawtext specific date and time with replay

Hi, > The Timestamp (1588305600) correspond at 2020:05:01 06:00:00. But when the > file is played, the date is OK, but the time does not correspond to 06:00:00 > but 21:11:21 Apparently the second argument is an offset added to the timestamp. Have you tried using the timecode arguments

Re: [FFmpeg-user] multiple bitrates with different logos

Hi, Are the logo png files transparent and same size as the video frame size? If so you can use the overlay filter with the logo file as second input. Regards, Ted Park ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org

Re: [FFmpeg-user] How to slow down a video

Hi, > But I'm lost how use it correctly. I want to slow down the video by 1.4 and > then increase the audio frequency (pitch) by 1.25. So if you slow the video down by 1.4, You are also slowing down the audio by the same amount right? I think 1/1.4, and to add to the pitch to 1.25 ratio

Re: [FFmpeg-user] change inputs or mapping while recording

Hi, > That works only under Linux, right? It seems libzmq is not enabled in the > FFmpeg build for Windows from Zeranoe. FFmpeg would need to have been built with 0mq support but I'm almost sure there are windows versions of the library, client and server. Any way to send commands to a filter

Re: [FFmpeg-user] change inputs or mapping while recording

Hi, > How can this be done with FFmpeg? Do you have an example? I know how commands > / sendcmd works. The opacity could be toggled, or the streamselect filter > could be used. But where does the switching signal come from, while FFmpeg is > running? The specific messaging protocol/method

Re: [FFmpeg-user] ffmpeg architecture question #2

Hi, > Output is actually 29.97p with 5th frame duplicates . The repeat field flags > are not taken into account. > If you use direct encode, no filters, no switches, the output from soft > telecine input video is 29.97p, where every 5th frame is a duplicate > > e.g > ffmpeg -i input.mpeg -c:v

Re: [FFmpeg-user] change inputs or mapping while recording

Hi, > I would now like to add stream2 as second video input and switch > between stream1 and stream2 back and forth without interrupting the > audio. Both streams are identical / come from identical cameras. > > Is there any sane way to do this with ffmpeg? Or how would you > recommend doing it?

Re: [FFmpeg-user] ffmpeg architecture question #2

Hi, I don't know if the decoder outputs 30fps as is from 24fps soft telecine, but if it does, it must include the flags that you need to reconstruct the original 24 format or set it as metadata because frame stepping in ffplay (using the "s" key on the keyboard) goes over 1/24 s progressive

Re: [FFmpeg-user] Can't write packet with unknown timestamp

Hi, It is pretty much abandoned but did you try the dvd2concat perl script in the tools directory? That will output a file to use with the concat demuxer (not the protocol, I think that is only good for files you can literally use cat to concatenate), and it is pretty big, it should show that

Re: [FFmpeg-user] Problem with recorded YouTube stream

Hi, > [NULL @ 0x248ee00] Opening 'RRTepdBvUFE.mp4' for reading > [file @ 0x248f620] Setting default whitelist 'file,crypto' > Probing mov,mp4,m4a,3gp,3g2,mj2 score:100 size:2048 > [mov,mp4,m4a,3gp,3g2,mj2 @ 0x248ee00] Format mov,mp4,m4a,3gp,3g2,mj2 probed > with size=2048 and score=100 >

Re: [FFmpeg-user] Muxing multiple files and concatenating those outputs

Hi, > I ended up just keeping it as a script and getting the developers to > incorporate it into our code. Thanks though! Since it is a script, a > single bash call is not too intrusive. If we had some C programmers, I > would have them use the ffmpeg libraries directly, but they are all just

Re: [FFmpeg-user] Problem with recorded YouTube stream

Hi, > [tls @ 0x22e0d00] The TLS connection was non-properly terminated. > [tls @ 0x22e0d00] The specified session has been invalidated for some reason. > [tls @ 0x2309820] The TLS connection was non-properly terminated.te= > 224.4kbits/s It doesn't look like the download was entirely

Re: [FFmpeg-user] Output image sequence duplicate first image

Hi, > Use the output option -r or the fps filter to control the frequency of the > image grabs. They will show different behaviour wrt the beginning of the grab > cycle. The identical frames at the start is surprising for me, why would that happen and not be counted as a duplicate? Does it

Re: [FFmpeg-user] Output image sequence duplicate first image

Hi, > /usr/src/app # ffmpeg -y -i /data/vod-storage-dev/source/testfile.mxf -r > 20/60 -s 283x159 -frames:v 10 -pix_fmt yuvj420p -c:v mjpeg > /data/vod-storage-dev/temp_out/1cq8tq69tkumv1es0zxeb0ty4qa_%03d.jpeg ... >Stream #0:0: Video: mpeg2video, yuv422p(tv, top first), 1920x1080 [SAR 1:1

Re: [FFmpeg-user] hw_decode.c on osx?

Hi, > you've probably already seen carl eugen's post referring to ticket 8615. > looks like this may be a regression ... to answer your question, though, > i'm on a 2018 mini (i7); gpu is "Intel UHD Graphics 630", which should > support hardware decoding for hevc (and certainly for h264). Yes,

Re: [FFmpeg-user] ffmpeg architecture question

Hey, >> I don't understand what you mean by "recursively". > > Haven't you heard? There's no recursion. There's no problem. The 'blend' > filter just has some fun undocumented features. Hours and hours, days and > days of fun. So much fun I just can't stand it. Too much fun. There's no