Re: [FFmpeg-user] Why are half the frames "duplicate" ?

On Wednesday, September 26, 2018 9:27:26 PM CDT sean darcy wrote: > I'm transcoding mpeg2 -> x264. > > Stream #0:0[0x64]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), > yuv420p(tv, progressive), 720x480 [SAR 8:9 DAR 4:3], Closed Captions, > 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc > I

Re: [FFmpeg-user] Implimenting Multi-Protocol Encapsulation and muxing with video in an MPEG2-TS

On Monday, September 24, 2018 9:01:31 PM CDT Steven La Plant (RIT Student) wrote: > I am working on a graduate project for R.I.T. and have had an awful time > trying to find a solution to transmit 2 Mbps telemetry data along side 3 > channels of video with a single MPEG2-TS. From what I have

Re: [FFmpeg-user] Detecting signal change on Decklink devices

On Sunday, September 9, 2018 5:53:03 PM CDT Chris Bisset wrote: > Is there a better method of detecting a signal change? I do not need ffmpeg > to gracefully handle it (I am OK with stopping and restarting when this > happens), but I do need a way to catch when a different input is plugged in.

[FFmpeg-user] Use input metadata for output file name

Does anybody know of a way to incorporate the service_name metadata from a live incoming mpegts stream into the output file name/path? Is there any means by which to make that metadata value available as a variable? -Reuben ___ ffmpeg-user mailing list

Re: [FFmpeg-user] How to convert 1 video type to another based on -i

On Friday, June 30, 2017 10:23:22 AM CDT Dan Violet Sagmiller wrote: > I have a video player with poor documentation. I have one video that works > (that came with a demo). > Is there any documentation that makes it easy to look at the info from one > video and convert another video to match

Re: [FFmpeg-user] Using FFMPEG to encode multiple outputs in 'parallel' (doesn't work?)

On Thursday, June 29, 2017 6:56:51 PM CDT shalin wrote: > Cley Faye wrote > > > More to the point, as far as I know, ffmpeg will not do parallel treatment > > on either input or output, as you deduced. It certainly is doable, but > > don't seem trivial to implement in the ffmpeg CLI tool itself

Re: [FFmpeg-user] FFMPEG sample example does not work!

On Tuesday, June 27, 2017 5:25:26 PM CDT Davood Falahati wrote: > Dear community, > > I am doing a video processing project with opencv and I have to read and > write video/audio streams with ffmpeg. I found the ffmpeg-output-example > useful, but I had a tough time to update it (I don't know the

Re: [FFmpeg-user] Streaming Syntax error

On Tuesday, June 27, 2017 7:09:46 PM CDT Mettavihari D wrote: > I tried the following: > /root/bin/ffmpeg -re -i /data/video/sinhala/innput-15m.mp4 -acodec > copy -vcodec copy -maxrate 1.5M -bufsize 3M -f flv -metadata > streamName=xlarge rtmp://some.site.com. You cannot adjust the bitrate of the

[FFmpeg-user] ffplay interactive playback control

Is there a means to have ffplay accept playback control from the terminal rather than from the player window? Similar to how ffmeg will can accept stdin input to control filters. -Reuben ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org

Re: [FFmpeg-user] Lost audio stream

On Wednesday, June 14, 2017 9:59:47 AM CDT Tung Tran wrote: > Hi Reuben > Thanks for your answer, so you think the reason ffmpeg lost the audio input > was the server performance? Yes. ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org

Re: [FFmpeg-user] Lost audio stream

On Tuesday, June 13, 2017 10:43:47 AM CDT Tung Tran wrote: > [decklink @ 0x3d28d80] Decklink input buffer overrun! Your encoder(s) is not keeping up. You will notice that in the stderr output that they are reporting approx 17fps. You input is 29.97. So your input buffer is filling up till it

Re: [FFmpeg-user] Problems with mpegts and long running stream

On Wednesday, May 31, 2017 3:09:06 PM CDT Mathias Schneider wrote: > During my search for a solution, I found this patch here: > https://github.com/arut/ffmpeg-patches/blob/master/mpegts-33bit > > I’ve patched my ffmpeg with it and it seems to solve my issue! > > Question: Did I something wrong

Re: [FFmpeg-user] Streaming audio on demaind

On Thursday, May 25, 2017 6:31:22 AM CDT Patrick Shirkey wrote: > This format works > but there is a noticeable lag while the file is downloaded before playback > starts and I see inconsistent results on mobile devices. Have you made sure that the moov atom has been placed at the front of the

Re: [FFmpeg-user] (no subject)

On Monday, April 17, 2017 6:22:18 AM CDT Erik Slagter wrote: > > according to mp4box tutorials that I have read about making mpeg-dash, I > > know that I have to set keyint and minkey int equal and also related to > > segment duration. so I tries using min-keyint=100, but the result video > > had

Re: [FFmpeg-user] Shrinking video files

On Monday, April 3, 2017 2:01:33 AM CDT Cecil Westerhof wrote: > Is there a way to decrease the size significantly, that does not take > to much time and still keeps a good quality? (By accident I went from > -crf 18 to -crf 120 instead of -crf 20. That was a very small file, > but very blocky.)

Re: [FFmpeg-user] Using h264 video format commercially

https://licensing.x264.org/ On Monday, March 27, 2017 4:59:34 AM CDT sunil_gupta01 wrote: > Hi there, > > We have developed a commercial offering to create personalized videos; we're > using FFmpeg to generate the videos in H.264 format. What are the > legal/license obligations in terms of using

Re: [FFmpeg-user] -movflags faststart revisited

On Sunday, February 26, 2017 5:44:56 PM CST JD wrote: > On Sun, Feb 26, 2017 at 4:07 PM, Cley Faye wrote: > > 2017-02-26 23:32 GMT+01:00 JD : > > > Are there any flags that will let me playback an unfinished transcode? > > > Reason I am asking is that if my

Re: [FFmpeg-user] -movflags faststart revisited

On Feb 25, 2017 9:35 PM, "JD" wrote: I retried to use this flag as it was indicated in a previous response by a user. Sorry that I was unable to continue on the original thread, because the gmail web interface deletes original message sent to this list by the OP, when the OP

Re: [FFmpeg-user] Using the flags -movflags +faststart

On Friday, February 24, 2017 8:36:05 PM CST JD wrote: > I did not stop the encoding. > Just opened another gnome-terminal and cd'd to the directory and > tried to play the unfinished file. > But now I see that I should not have included the + sign for the > faststart. Yeah, that’s not going to

Re: [FFmpeg-user] ffmpeg slowly get out of sync

On Wednesday, November 16, 2016 7:59:44 PM CST Luo Xin wrote: > - capture video from v4l2 device > - capture audio from alsa device The drift is going to happen to a certain extent no matter what. You are sourceing from two separate pieces of hardware that do not share a common hardware clock

Re: [FFmpeg-user] How to output the MPEG-4 streaming to file?

On Wednesday, October 26, 2016 9:51:45 AM CDT Yuki Nakamura wrote: > 2016-10-25 17:35 GMT+09:00 Carl Eugen Hoyos : > > 2016-10-25 5:58 GMT+02:00 Yuki : > > > I want to output the MPEG-4 streaming to file. > > > > > > When try to output the MP4 stream to a

Re: [FFmpeg-user] ISO mp4 Major Brand field non-compliant

On Monday, October 24, 2016 12:02:14 PM CDT Owl Owl wrote: > 3) The version that works has a note: "File suitable for progressive > download (moov before mdat)". This seems relevant to playback and would > probably constitute a format change that would cause chromecast to work or > not. Is there a

[FFmpeg-user] Tee muxer and rtmp parameters

I’m trying send rtmp connections to 2 separate destinations using the tee muxer, but I haven’t been able to find a way to set rtmp_conn values separately for each rtmp slave. Is this even possible using the tee muxer? I’m currently using 3.1.4. (can build head of master if that makes any

Re: [FFmpeg-user] DeckLink Output Controls

On Tuesday, October 11, 2016 11:37:38 AM CDT Marcelo Boufleur wrote: > > Although that is in the official spec, I have never seen any SDI equipment > > use > > anything other than 48k. Doesn’t mean any doesn’t exist, but if so it’s > > not > > very common. > > I agree. I have seen some SDI

Re: [FFmpeg-user] DeckLink Output Controls

On Sunday, October 9, 2016 11:48:27 PM CDT Marcelo Boufleur wrote: > > SDI is 20bit 48k audio only. There’s really no good reason for anything > > else. > > Technically SDI also supports 48048 and 47952 to allow for pull up/down, > > but I > > think that is done by manipulating the clock rather

Re: [FFmpeg-user] DeckLink Output Controls

On Friday, October 7, 2016 5:25:10 PM CDT Matthias, Thomas wrote: > Hi There, > > I’m looking into using FFMPEG for its DeckLink device control. The capture > part of the API seems fairly fully featured, however the output/playback > controls seems to have some strange limitations.

Re: [FFmpeg-user] Controlling an ffmpeg stream?

On Wednesday, September 7, 2016 5:00:27 PM CDT Roy Pardi wrote: > Hi, I am new to the list and also to ffmpeg so this is likely to be a naive > question. > > > My question concerns the command line version of ffmpeg. I am developing a > cross-platform app in Adobe AIR and the problem I am trying

Re: [FFmpeg-user] Controlling an ffmpeg stream?

On Wednesday, September 7, 2016 11:01:12 PM CDT Sven C. Dack wrote: > Hello Roy, > > have you looked at ffserver yet? See it's manpage ffserver(1): ffserver is junk and is to be removed from the next release IIRC. -Reuben ___ ffmpeg-user mailing list

[FFmpeg-user] Filter threads vs encoder threads

Is it possible to use slice-threads for the filter graph, while using strictly frame-threads for the encdoing? In my case it would be sliced threads for yadif, and then frame threads for libx264. Furthermore, if it is possible, is it pragmatic to do so? I’m not certain if ffmpeg does filters

Re: [FFmpeg-user] Video Standards for the Net

On Tuesday, August 30, 2016 11:22:21 PM CDT Mike Brown wrote: > On Tue, Aug 30, 2016 at 10:42:48PM -0500, Reuben Martin wrote: > > The sooner anamorphic resolutions and interlacing dies in broadcast, > > the better. > > Not gonna happen. 480i29.97 and 1080i29.97 is here to

Re: [FFmpeg-user] Video Standards for the Net

On Tuesday, August 30, 2016 7:16:47 AM CDT Mettavihari D wrote: > Greetings, > > Thank you for your notes. > > On Mon, Aug 29, 2016 at 9:01 AM, Reuben Martin <reube...@gmail.com> wrote: > > On Monday, August 29, 2016 5:40:41 AM CDT Mettavihari D wrote: > > > W

Re: [FFmpeg-user] Video Standards for the Net

On Monday, August 29, 2016 5:40:41 AM CDT Mettavihari D wrote: > We have recently installed clipbucket as a video site > I find that the compression they use is as below. > My question is whether those standards are good or they should be increased > in quality. “Good” is context specific. You

Re: [FFmpeg-user] Using ffmpeg to stream to or from Blackmagic Decklink Card

On Sunday, August 28, 2016 11:05:53 AM CDT davood afshari wrote: > 1. H264 Pro (Encodes input stream to h264 - USB interface) No: at least not useing the decklink api > 2. Ultrastudio Mini Recorder (Gives RAW video - Thunderbolt interface) > *Decoders(Playout):* Probably: assuming everything is

Re: [FFmpeg-user] ffmpeg hangs when encoding rtmp input stream

On Monday, August 15, 2016 4:06:52 PM CDT Junior wrote: > Do you know what is the recommended (more stable) version of nginx and > nginx_rtmp to work with for a production environment? There really is no “recommendation” other than test it out and see if it works for you. I’m currently using

Re: [FFmpeg-user] ffmpeg hangs when encoding rtmp input stream

On Monday, August 15, 2016 9:59:36 AM CDT Junior wrote: > I was using the head of nginx_rtmp module and version 1.11.3 If you want to use the module with nginx >= 1.10.0 then you need to build from Sergey’s dev branch. (it’s stable despite being the dev branch. Unstable features each have their

Re: [FFmpeg-user] ffmpeg hangs when encoding rtmp input stream

On Friday, August 12, 2016 10:57:43 AM CDT Junior wrote: > I'm using ffmpeg to reencode the input coming from nginx_rtmp module with > the command below: What code-base are you sourcing the nginx_rtmp module from? And which version of nginx? The origional code-base by Arut has not received any

Re: [FFmpeg-user] HTTP playlist stream copy to an IP QAM modulator

On Tuesday, July 19, 2016 10:16:03 PM CDT Anacelia Sarlo wrote: > ffmpeg -re -y -i $stream -c copy -f mpegts -map 0:0 -map 0:1 > -mpegts_pmt_start_pid 66 -streamid 1:71 -streamid 0:70 udp:// > 192.168.1.108:1234?pkt_size=1316 > > When I watch the stream from the cable network, the audio is OK

Re: [FFmpeg-user] Could not write header for output file #0 (incorrect codec parameters ?):

On Thu, Jun 23, 2016 at 4:00 PM, juan carlos Rebate wrote: > according to the standard, html5 the mp4 format is ideal for this purpose, > many companies that previously used flash html5 technology now used in mp4 > format, so again I say that is because ffmpeg > You need to

Re: [FFmpeg-user] Using ffmpeg to stream to or from Blackmagic Decklink Card

On Tuesday, June 14, 2016 1:46:52 AM CDT davood afshari wrote: > Hello, > I want to use blackmagic cards with ffmpeg to stream their input but there > is a problem. > When I use "H264 Pro" Encoder as a "decklink" or "dshow" input, I see this > error in command line output of ffmpeg. Device is ok

Re: [FFmpeg-user] considering image sequence+audio for video preservation

On Sunday, June 12, 2016 1:58:00 PM CDT ibrahim wrote: > the image format for the image sequence should be a lossless compressed > or uncompressed free/libre format and it should preserve the significant > properties of video such as interlacing, colour space (without any > colour conversion),

Re: [FFmpeg-user] translate rtp to http

On Wednesday, June 1, 2016 4:38:12 AM CDT the serial top-poster juan carlos Rebate wrote: > the problem esque presupposes that I want to play in ffplay, but I do not > want to play in ffplay I want reproduvcirlo in a html5 player for > android created > by me, so this repeat does not work and is

Re: [FFmpeg-user] MTS to MOV with different audio codec

On Thursday, May 26, 2016 2:20:14 PM CDT Mateusz Sołtys wrote: > Everything looks ok untill i open converted file .avi works with 50i while > .mov cannot play 50i, intead it's just 25p. According to the metadata you posted, it's still 50i. Scan type : Interlaced Scan type, store method :

Re: [FFmpeg-user] Issues with sliced video

On Tuesday, May 31, 2016 6:14:15 PM CDT Celso Junior wrote: > Hello there > Make sure to use -c:v copy -c:a copy to mantain video and audio quality in > your output. That will not work unless the start and stop points are on I-frames. > 2016-05-31 11:14 GMT-03:00 Praveen kumar

Re: [FFmpeg-user] translate rtp to http

On Tuesday, May 31, 2016 4:02:37 PM CDT the serial top-poster juan carlos Rebate wrote: > I don't do top posting > the encoder is not shit please do not insult, the problem is that FFmpeg > does not work well > On my computer: RTP source - ffmpeg -re -f lavfi -i

Re: [FFmpeg-user] Apparently the ffmpeg software scaler "sucks"

On Wednesday, May 18, 2016 6:17:04 AM CDT Peter Rabbitson wrote: > According to a test image taken from > http://www.4p8.com/eric.brasseur/gamma.html ffmpeg's scaler does not > properly deal with... well scaling. > > The following pipeline produces a "SUCKS" verdict on ffmpeg 2.8.6: > >curl

Re: [FFmpeg-user] [FFmpeg-devel] Fwd: ffmpeg live streaming

On Friday, March 18, 2016 12:52:17 AM Kamal Bijlani wrote (to the developer list: > Hello ffmpeg developer, This isn’t really the type of topic for the developer mailing list, you probably won’t get much a response to this sort of question there. The ffmpeg- users mailing list is more

[FFmpeg-user] Copy GOP structure

Is there any way to transcode an h264 stream, but retain the frame type and GOP structure of the origional? Preferably in real time with a live stream without haveing to dump the frame data to a file or some other type or pre-pass analysis. ___

Re: [FFmpeg-user] Faststart with ffmpeg...but need it fast!

qt-faststart infile.mp4 outfile.mp4 On Friday, June 12, 2015 02:28:05 AM Dani A wrote: I want to make my video files to start fast, but I am not changing any encoding, how can make ffmpeg do this task fast without going through the whole encoding which is not needed?? My command is below:

Re: [FFmpeg-user] Conform framerate with ffmpeg

On Friday, May 15, 2015 02:42:06 PM Carl Eugen Hoyos wrote: Carles Vila cvilad at gmail.com writes: 2. Is there a way to conform a ProRes file directly with ffmpeg? All audio channels playback sample rate should also be modified accordingly. How is that possible without transcoding?

Re: [FFmpeg-user] No luck with live stream from ffmpeg to ffserver

On Saturday, May 02, 2015 06:50:25 PM En Figureo Canal wrote: I haven’t had much luck deploying ffserver, nothing works out for me streaming live from ffmpeg to ffserver. Had different problems, I don’t know if my configuration is correct but, can’t really get ffsever to do what I need and

Re: [FFmpeg-user] help with live streaming with ffserver

On Sunday, May 03, 2015 09:28:49 PM Ricardo Kleemann wrote: I'm running a simple test... I'm simulating a live stream by reading a file with ffmpeg and feeding it to ffserver. [...] I want to be able to play it within an HTML5 video object by accessing via http from ffserver. This is not

Re: [FFmpeg-user] Use force_key_frames to obtain keyframes at exactly the same positions as in the input stream?

On Saturday, May 02, 2015 06:00:32 PM Haris Zukanovic wrote: My case is live streaming. I have tried it and definitely keyframes are not aligned between input and output streams. For all encoded output streams it is very simple to obtain alignement with setting the fixed GOP size. But the PTS

Re: [FFmpeg-user] Decklink Capture

On Thursday, March 12, 2015 08:01:04 PM Dave Rice wrote: On Mar 12, 2015, at 7:30 PM, Reuben Martin reube...@gmail.com 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

Re: [FFmpeg-user] Decklink Capture

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 fine. I’m just curious about trying to access it directly. Same here, though I still use bmdtools.

Re: [FFmpeg-user] Decklink Capture

On Wednesday, March 11, 2015 07:19:14 PM Dave Rice wrote: You can select the input device. Use the -list_devices option to see what is available. However within a single device that has multiple inputs can you not select the input of that device in the same way that bmdcapture can. To set the

Re: [FFmpeg-user] Fwd: Stream mp4

On Tue, Mar 3, 2015, at 07:56 AM, Reuben Martin wrote: On Tuesday, March 03, 2015 06:15:02 AM aradeonas wrote: Days I trying to stream mp4 file with ffserver. I read many questions like these: [...] Finally I cant understand is mp4 stream able or not? Is it a way to do

Re: [FFmpeg-user] Switching live input source

On Monday, August 04, 2014 02:11:36 PM Andrew Sinclair wrote: Hi All, Does anyone know a means to switch the input to ffmpeg while it is running? i.e. say I am doing an encode from a live source but would then like to switch the input to a file for 60 seconds and then back to the live

Re: [FFmpeg-user] Assumefps() equivalent in FFMPEG

On Wednesday, July 30, 2014 07:02:49 AM Eugene Gekhter wrote: In my avisynth workflow, I stretch the audio to 36% of its original rate to get it to play at the right speed and with perfect sync with the video, something like video.*assumefps(*18*)*.*TimeStretch(*rate=36*).* In ffmpeg you would

Re: [FFmpeg-user] Assumefps() equivalent in FFMPEG

On Tuesday, July 29, 2014 02:54:40 PM Eugene Gekhter wrote: I have a 50fps progressive scan file that I need to playback at 18fps - no dropped frames. I try and accomplish the same result of 18 fps, 18 tbr, 18 tbn, and 18 tbc directly in ffmpeg with: -r 18 -i SourceFileName -y -vcodec copy