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In the end, it's important to know which timestamp you're using in seeking. I am creating AVPacket from encoded data and initially the PTS and DTS value of video/audio frames is equivalent to AV_NOPTS_VALUE . I checked my timebase to be 1/44100 and some pts values : 70754080000, 70759090000, back to back packet pts values. ffmpeg -i input. mp4 -filter:v scale=640:480 -c:a copy output. FFplay is a very simple and portable media player using the FFmpeg libraries and the SDL library. Y4M ffmpeg -i input_60. com][2] 视频如何同步 在之前的教程中,我们已经可以开始播放视频了,也已经可以开始播放音频了,但是视频和音频的播放还未同步,我们要怎么办呢? PTS 和 DTS 好在音频和视频都有信息 I am trying to understand the pts value in an audio encoded packet in ffmpeg. 264 video with AAC audio in an MP4 container using FFmpeg after just three years. Too small and FFMPEG won't start and too large and it will run but give the following error: "Warning vbv_delay will be set to 0xFFFF (=VBR) as the specified vbv buffer is too large for the given bitrate!". mp4 //half speed Slow motion video using ffmpeg. Coding: Synching and using the PTS. The libraries themselves are not part of cgkit, they must be installed separately as shared libraries. mp4 -s 1280x720 -c:a copy output. mp4 Or, $ ffmpeg -i input. I think I understand the statements intent. 4) obs builds, and the frame pts/dts are being set properly. mkv The filter works by changing the presentation timestamp (PTS) of each video frame. Or, $ ffmpeg -i input. 1). mp4 -r 25 -vf "setpts=(9. 0*PTS" outputvideo. I have enabled nvenc support on ffmpeg and made live streaming mosaic. Some videos packets do not contain pts, when trying to seek these videos while using h264_cuvid decoder and decode from the new position the decoder produces frames with incorrect timestamp. it is mainly effective when you have consistent "series" type lists, like the one's that ffprobe produces. 264 video encoding, FFmpeg uses external open source library x264. mp4 Set the color to be used for drawing border around text. ffmpeg is a CLI (command line based) utility for processing media files. Convert a video to CD or DVD format. mp4 -filter:v "setpts=2*PTS" output. time_base. FFmpeg utility supports almost all major audio and video formats, if you want to check the ffmpeg supported available formats you can use . > To encode F2 and F3, we need F4 (B frames). 0, avutil 50. Start the sequence from the specified number. Hi, When I use FFMPEG (SOFA-EXTERNAL_FFMPEG set to on ) on windows, the file VideoRecorder. Set PTS=DTS. 6 (avformat 52. When using ffmpeg to compress a video, I recommend using the libx264 codec, from experience it has given me excellent quality for small video sizes. It uses ffmpeg to concatenate the input TSs and it generates the output TS that is the result of concatenate all input TSs It’s very important to know that ffmpeg concat uses the last PTS of input file number N to set the first PTS of the file N+1. My GoPro Hero3 will output 240fps in WVGA mode. Hi. 5 and 1, respectively. 1 Examples. xml mostly to set passwords to stream. You can set a target type as follows: add -target type; type can of the following be vcd, svcd, dvd, dv, pal-vcd or ntsc-svcd on the command line. mp4 -s 640x480 -c:a copy output. It turns out all you need to do is pass in filter with a PTS (presentation timestamp) value: Faster Video Speed examples using the libav* api. mkv -r 16 -filter:v “setpts=0. static av_cold int init(AVFilterContext *ctx). Ffmpeg encode video. As ffmpeg will be extracting multiple files we are using thumb%04d. The solution is to keep track of another value, the time at which we set the video clock to the PTS of the last frame. mkv -filter:v "setpts=0. mp4. 14. ts -c:vcopy -c:a copy output. say if you are running a script that is using ffmpeg within it to process, then you'd start that script, then this script, citing the . Whether you want to join two video files, extract the audio component from a video file, convert your video into an animated GIF, FFmpeg can do it all and even more. The problem was that I was thinking in PTS and FFmpeg was thinking in DTS, so when I asked FFmpeg to seek to a timestamp of 11, it seeked to a DTS of 11 (or PTS=12, which is where I already was!). Original 2012-11-16, Updated 2016-04-05: cleanup and information about overlaying images. 0*PTS" output. -r is the framerate (fps) -crf is the quality, lower means better quality, 15-25 is usually good -s is the resolution -pix_fmt yuv420p specifies the pixel format, change this as needed. hh:mm:ss[. In more detail with some screenshots: How to install ffmpeg on Windows Installation procedures on OSX and Linux are significantly different from Windows. HANDY TIP: Using FFprobe for stream analysis - Forum dedicated to FFmpeg; a free / open source multimedia software project that produces libraries and programs to record, convert and stream audio and video. Gathering knowledge online with help of two  Oct 2, 2018 ffmpeg -y -i input_60. It can also convert between arbitrary sample rates and resize video on the fly with a high quality polyphase filter. streams []. > The decoder will receive frames in the following order. To create a video CD or DVD, FFmpeg makes it simple by letting you specify a target type and the format options required automatically. Default value is 1. Using ffmpeg to convert a set of images into a video. ts file (or any FFmpeg-compatible source) to as . mp4 -filter:v "setpts=0. ts source files to . We can use a lot of filters. avi -vn -ar 44100 -ac 2 -ab 192 -f mp3 audio3. >> It is set in the time_base field of the AVCodecContext structure. I was looking for a tutorial/book that would teach me how to start to use FFmpeg as a library (a. fps Set frame rate (Hz value, fraction or abbreviation), (default = 25). Similarly, to convert the above file to 640×480 size, run: $ ffmpeg -i input. mkv -vf "setpts=0. mp4 -vf "setpts=0. When trying to stream copy (I'm trimming files) WTV files I often get an. $ ffmpeg -i input. If you need to apply different  Jan 10, 2017 ffmpeg -i input. Created attachment 8681028 [details] [diff] [review] P1. This class can convert videos between formats with ffmpeg program. Show help. xxx] syntax is also supported. It can convert arbitrary sample rates and resize videos on-the-fly with a high quality poly-phase filter. If set to 1, expand the filename with pts from pkt->pts. It is free and available for Windows, Mac and Linux machines. mp4 -vf  This dilemma is intrinsic to ffmpeg, and ffmpeg-python tries to stay out of the way while . ts FFMPEG is an incredibly powerful tool that allows you to manage and convert both audio and video files simply from the command line. I use decoder-converter-encoder chain to trancode mpegts video stream with ffmpeg as reciever and transmitter. Default value is 0. samirchen. e. The easiest way to install ffmpeg on Linux is to use the included packet managers, all distros I' aware of support installing ffmpeg this way. c. png. Defaults to false. mp4 -vf "setpts=4. The PTS is accessible by pMfxBitstream->TimeStamp which is correct. FORMAT OPTIONS¶ The libavformat library provides some generic global options, which can be set on all the muxers and demuxers. 1 Commands syntax; 14. list_formats If set to true, print a list of supported formats and exit. 5*PTS" outputvideo. Note that in the following examples, the audio stream is not changed  14. shown. typedef struct AVStream { /** * This is the fundamental unit of time (in seconds) in terms * of which frame timestamps are represented. You can set the framerate stamped on the output video with -r to stop ffmpeg dropping frames, with a bit of math. size Set frame size. Hello, I am using the "simple_6_transcode_opaque - async - ffmpeg" example and would like to fix the PTS / DTS calculations. This comes out that the timestamp was in hh:mm:ss:mm format, but I want it in hh:mm:ss format. frame_pts. 4 obs builds, but I still get the same errors and the output file is trash: pts/dts are sequential. One of my favorite TV sports illustration techniques is speeding video up (time-lapse) or slowing it way down (slo-mo replay); naturally I wanted to know how to manipulate video speed with ffmpeg. Inert when nofillin is set. Useful FFmpeg Commands. wav sndio sndio input device. fps porblem when saving video in mp4 container Post by theateist » Mon Nov 26, 2012 12:36 pm When I decode frames from avi file and then decode them in x264 and save to mp4 file, the fps of the output file is always 12,800. sdp -f mpegts -acodec libfaac -ab 48k -vcodec copy out. mov -c copy -output_ts_offset 4. 4. mpg -vf "setpts=4. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy. Ignore DTS if PTS is set. We can accomplish this by using an internal video_clock value which keeps track of how much time has passed according to the video. This might be a first source of confusion. Generated on Fri Oct 26 02:49:57 2012 for FFmpeg by 1. mp3 To increase video play back speed command line is: $ ffmpeg -i video. I know programatically once can set PTS=DTS in ffmpeg to overcome this. 17 settb, asettb. For example, an encoding use case with decklink capture source where video_pts and audio_pts are set to ‘abs_wallclock’. 0, avcodec 52. Even though this document is very new I now understand why fiddling with the PTS value in the filtergraph would slow down/speed up some video I was tinkering with a while back, for example. OK, I Understand Jan 16, 2019 You can change the speed of a video stream using the ​setpts video filter. Varying bufsize within the limits according to FFMPEG has It sounds like in going from the J version to the non-J, ffmpeg is "legalizing" the levels to fit within the 16-235 color range. mp4 To decrease playback speed, run: $ ffmpeg -i inputvideo. mp4 If I stayed at obs head and revert to ffmpeg-3. At the same time we need to keep track of when the next frame is expected so we can set our refresh rate properly. 0, swscale 0. 2 Examples. 0. Here are some useful FFMPEG commands that you can make use of to manage your media files. if ((ret = av_expr_parse(&setpts->expr, setpts->expr_str, . {. For the syntax of this option, check the (ffmpeg-utils)”Color” section in the ffmpeg-utils manual. Apr 5, 2016. 15. 54 - muxdelay 0 -muxpreload 0 1. FFmpeg is an extremely powerful and versatile command line tool for converting audio and video files. 18 showcqt. So blacks at 0 are getting smooshed up to 16 and they look dark grey. wallclock Set the initial PTS using the current time. For H. Can ffmpeg set pts values of the output frames. ffmpeg video converter duration Restrict the transcoded/captured video sequence to the duration specified in seconds. 5. FFmpeg has a lot more different options to do various advanced functions. Netflix has finally gotten on the bandwagon. See (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual for the accepted syntax. No, this ~/ffmpeg -i xxx -y -f webm -codec:v libvpx -codec:a libvorbis -aq -1 -ac 1 -af " volume=2. It is a framework with a multitude of features and, because Using ffmpeg to convert a set of images into a video. Sep 13, 2016 Edit the file /usr/local/etc/icecast. This adjusts frames’ metadata related to how long each is displayed—exactly what you want. Brief: This detailed guide shows how to install ffmpeg in Ubuntu and other Linux distributions. Follow the instructions in Publish and play a live stream (MPEG-TS based encoder) in Wowza Streaming Engine to set up a live application to re-stream the FFmpeg stream. Fix pts calculation in FFmpeg video decoder. FFmpeg is a command-line tool that uses commands to convert audio or video formats. Try adding -copyts -start_at_zero or  The notional way to do this is ffmpeg -y -i 1. 1:10000 as the Stream URI . ffmpeg — FFmpeg wrapper¶ This module is a thin ctypes-based wrapper around the functions provided by the ffmpeg libraries. Playing even more with bufsize shows that FFMPEG is a bit picky about this value. libav) and then I found the "How to write a video player in less than 1k lines" tutorial. The default value of bordercolor is “black”. But, the video plays with some pauses. 5*PTS" output. This was cpulimint can finds its pid. When configuring the application and adding a stream file on the Stream Files page, use udp://127. 2 Example $ ffmpeg -i input. . The class also shows how to extract sequences of images from a video file. GitHub Gist: instantly share code, notes, and snippets. Here I’m going to show examples of FFmpeg video and audio filters and Frei0r plugin effects. It calculate necessary cropping parameters and prints the recommended parameters through the logging system. Jan 30, 2012 How to speed up or slow down video using ffmpeg. If you use a  ffmpeg \ -i input_file \ -r output_fps \ -filter_complex \ "[0:v]setpts=input_fps/ output_fps*PTS[v]; \ [0:a]atempo=output_fps/input_fps[a]" \ -map "[v]" \ -map "[a]" \   SetPTSContext;. ffmpeg tutorial 05 with SDL2 and audio resampling fix - ffmpeg_tutorial05. ffmpeg-formats - FFmpeg formats DESCRIPTION¶ This document describes the supported formats (muxers and demuxers) provided by the libavformat library. To convert that to 25fps slomo, I use the following command: ffmpeg -i input. mpg -  May 9, 2016 Ffmpeg to the rescue! To do some frame manipulation a video filter “setpts” is what one needs. At the end of the fade-in effect the output audio will have the same volume as the input audio, at the end of the fade-out transition the output audio will be silence. The detected dimensions correspond to the non-black area of the input video. PTS meaning in ffmpeg. 16 setrange; 14. zip, unzip it, using Avisynth has its advantages for resizing and possible other tweaks, like best deinterlacers etc. FFmpeg * decoding: set by libavformat * encoding: May be set by the caller before avformat_write_header() to * provide a hint to the muxer about the desired timebase. so it looks like you will have to custom parse the list for the { 'n', 'iskey', 'type' and 'pts_time' } criteria you mentioned in post # 1. mp4 The lower the PTS value, the faster the time-lapse video is generated. When decoding, it is set by libavcodec. >> AVCodecContext). /ffmpeg -formats command to list all supported formats. To enable this input device during configuration you need libsndio installed on your system. Larger blocks give better noise suppression, but also give worse detection of small movements. Apparently you are expected to set the pts when allocating the buffer of a frame. This is my third article about video processing with Rails. Set s->thread_count before calling avcodec_open2() instead of calling this. ok, you can avoid ffmpeg using DGindex+Avisynth+x264+MP4Box workflow for m2t files even using batch modes to encode lots of files at once, it is not that straight forward but nevertheless possible, download that M2T to MP4. How to use PTS (presentation timestamp) from mpegts to syncronize transcoded video and audio? How to pass pts to chain and obtain valid AVPacket for transcoded video? HANDY TIP: Using FFprobe for stream analysis - Forum dedicated to FFmpeg; a free / open source multimedia software project that produces libraries and programs to record, convert and stream audio and video. That way the current value of the video clock will be PTS_of_last_frame + (current_time - time_elapsed_since_PTS_value_was_set). Try adding -copyts -start_at_zero or -vsync  setpts only works when you also instruct ffmpeg to copy or transform input timestamps to output timestamps. cpp in SofaHelper does not compile. If you are new to this tool, here are some handy commands that will give you a better idea about the capabilities of this powerful tool. We add this value to our big struct. duration Restrict the transcoded/captured video sequence to the duration specified in seconds. Adjusting it with ffmpeg is done via the setpts video filter like so: ffmpeg -i input. ts. Convert a . 14. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. > > <quote> > However, ffmpeg reorders the packets so that the DTS of the packet > being processed by avcodec_decode_video() will always be the same as > the PTS of the frame it returns. In this example we are using "fps=1" so ffmpeg will filter the video and extract one image (1 frame per second) for the output. I am trying to understand the pts value in an audio encoded packet in ffmpeg. Join us in building a kind, collaborative learning community via our updated Code of Conduct. In * avformat_write_header(), the muxer will overwrite this field * with the timebase that will actually be used for the timestamps 头文件 写法 ffmpeg摄像头 ffmpeg合并文件 头文件 C++ iomanip头文件 文件头 c 头文件 NDK头文件 eclipse头文件 algorithm头文件 C++头文件 头文件 头文件 头文件 头文件 头文件 头文件 头文件 头文件 C++头文件 ffmpeg 写mp4文件 ios pods ffmpeg 找不到头文件 调用FFmpeg找不到头文件 ffmpeg -i <input> which only searches a short distance into the input file. Global av_set_pts_info this function is not supposed to be called outside of lavf . avi -f decklink -list_devices 1 dummy coding using two open source projects FFmpeg and x264. Users of Ubuntu 15. If you use a larger value, the video will display in slower motion. -vf this parameter is used to apply video filters with ffmpeg. I have tried various filters but the result is always new pts values on the output. [WIP] Learn FFmpeg libav the Hard Way . 6/1)*PTS" output. mp4 for VOD playback with Wowza Streaming Engine: ffmpeg -i input. 7. mp4 20. 122. ffmpeg -list_devices true -f dshow -i dummy Convert . I would imagine it having something to do with the time base. Two bad methods out of the way, the right way to change video speed using ffmpeg is by adjusting the “presentation time stamp” (PTS). 25*PTS” output. Description ffmpeg is a very fast video and audio converter that can also grab from a live audio/video source. issue. 110. 43. As I know PCR stored in 42bits and PTS stored in 33bits in mpegts container @echo off setlocal Hello, I am using the "simple_6_transcode_opaque - async - ffmpeg" example and would like to fix the PTS / DTS calculations. mp4 Synchronize audio and video that start at different timecodes FFmpeg 入门(5):视频同步. 15/TB)" -ar 24000 -vf "yadif=0:-1:1, . The module was built against ffmpeg version 0. 本文转自:[FFmpeg 入门(5):视频同步 | www. update. Global av_set_parameters pass the options to avformat_write_header directly. It also demonstrates some useful ffmpeg commands for practical usage. > I am going through the ffmpeg tutorials and am having trouble making > sense of this statement in tutorial 5. PTS is presentation timestamp, the time at which the frame ought to be presented i. Is there any way in the command line to set PTS=DTS for ffmpeg while. Default is 1. Long, detailed tutorial on how to use ffmpeg, a powerful, multi-purpose audio and video processing software, including conversion and transcoding, scaling and quality, image extraction, combination and GIF creation, splitting and joining of videos, timestamps, subtitle extraction and embedding, video speedup and slowdown, smoothing effect and interpolation, and more pts & pcr values limit in mpegts? Tag: ffmpeg,mpeg,pts,iptv. Thus, we have to multiply them by 0. FFMPEG: Encode, Video Full Name: Video Bitrate Variables: integer (bits/s) Codecs: all Web sites: Description: Used to set video bitrate, in bits per second. Defaults to 0. it seems to be related to pkt_dts not being 2. Examples Record a stream from default device: ffmpeg -f pulse -i default /tmp/pulse. To coerce ffmpeg to search further for the subtitle stream, use options: -probesize <bytes> -analyzeduration <microseconds> which will cause ffmpeg to search until the first of those limits is reached. mkv We're going to use pts (presentation time stamps) to speed-up our video of a factor 4: ffmpeg -i TheGoodTheBadAndTheUgly. setpts= set presentation timestamp ffmpeg -i input. 8 1. If no padding is needed use something similar to pic%d. For example, if there are two succesive frames shown at timestamps 1 and 2, and you want to speed up the video, those timestamps need to become 0. k. It provides several examples of converting videos using the ffmpeg executable passing the origin and destination video file names as parameters. 8 I'm trying to make a mosaic from 16 live wowza streams with ffmpeg. $ ffmpeg -i inputvideo. Examples. What good is all this without a few examples. mp4 The presentation timestamp (PTS) is a timestamp metadata field in an MPEG transport stream or MPEG program stream that is used to achieve synchronization of programs' separate elementary streams (for example Video, Audio, Subtitles) when presented to the viewer. mp4 The above command will set the resolution of the given video file to 1280×720. We're going to use a movie clip (The Good, the Bad and the Ugly) as a sample Get a new ffmpeg To get a recent version you can compile ffmpeg or simply download a static build . I dont know how to convert that to real time. You can also reduce video speed as follows: $ ffmpeg -i video. 18. If you divide each frame's timestamp by 2 (0 -> 0,  setpts only works when you also instruct ffmpeg to copy or transform input timestamps to output timestamps. Contribute to argvk/ffmpeg-examples development by creating an account on GitHub. > The presentation order (PTS) is F1, F2, F3, F4. if I remember correctly It works if I was running multiple scripts using the same command. For example: To extract sound from a video and save it as MP3, you can use command line: $ ffmpeg -i video1. P's PTS cannot be 2. Unfortunately it was deprecated, so I decided to write this one. cropdetec can auto-detect crop size. Adjusting it with ffmpeg is done via the setpts video filter like so: Follow the instructions in Publish and play a live stream (MPEG-TS based encoder) in Wowza Streaming Engine to set up a live application to re-stream the FFmpeg stream. line_spacing – Set the line spacing in pixels of the border to be drawn To emulate in normal expansion mode use the pts function, supplying the start  Oct 29, 2015 Increase Video Playback Speed. a. 5, asetpts=PTS-(1. This is the primary reason why we got no pts returned (pts were set to 0) when using early version of LibAV. True, maybe ask the ffmpeg-user mailing list, and/or superuser. The above command will set the resolution of the given video file to 1280×720. 25*PTS"  Apr 28, 2016 For example, to go from an input of 4 FPS to one that is sped up to 4x that (16 FPS):; ffmpeg -i input. 5*PTS" -pix_fmt yuv420p  Apr 16, 2019 This detailed guide shows how to install ffmpeg in Ubuntu and other Linux distributions. ffmpeg tutorial 05 with SDL2 and audio resampling fix /* if we aren't given a pts grep won't work for listings like that ffmpeg -vf showinfo -f null - produces. png or %d. Setting value to ‘pts’ is applicable only for a live encoding use case, where PTS values are set as as wallclock time at the source. mp4 -filter:v "setpts=2. I worked at RealNetworks for over six years and became their onsite encoding expert for creating H. start_number. ffmpeg video converter fps Set frame rate (Hz value, fraction or abbreviation), (default = 25). How to set pts time format when using ffmpeg filter to add timestamp. Global avformat_alloc_output_context deprecated in favor of avformat_alloc_output_context2() Global sws Set the size of the x and y-axis blocks used during metric calculations. At its core is the FFmpeg program itself, designed for command-line-based processing of video and audio files, and widely used for format transcoding, basic editing (trimming and concatenation), video scaling, video post FFmpeg is a very fast video and audio converter that can also grab content from a live audio or video source. If I revert obs to a33db9a (w/3. This solution is very similar to what we did with get_audio_clock. ffmpeg’s mpeg2video encoder does not do automatic thread detection, so I set this to 4 because I’m working on a 4-core machine; you could omit this option, but if you’re outputting to one or more codecs, and you’re using -threads 0 with another codec, ffmpeg will try to use the automatic thread detection on the MPEG-2 output, and it FFmpeg is a free and open-source project consisting of a vast software suite of libraries and programs for handling video, audio, and other multimedia files and streams. FFmpeg is a comprehensive multimedia encoding and decoding library that consists of nu-merous audio, video, and container formats. 17. All these features are being added to the app I described in my previous articles: Read first: Simple Video Processing with FFmpeg and Ruby on In this tutorial we will see some useful FFMPEG commands that you can use on Ubuntu/Linux Mint to make screencasting videos, rotate videos, add logo/text watermarks to a video, insert shapes, and so on. Maybe this has previously been explained in some other threads but I wonder what the exact convention should be if we have to pass a PTS value to a codec and have to capture a -b []. How to use PTS (presentation timestamp) from mpegts to syncronize transcoded video and audio? How to pass pts to chain and obtain valid AVPacket for transcoded video? So understanding how everything works internally will translate directly to a better grasp on how to use ffmpeg at the commandline. int ret;. Getting help In this guide, I have merely covered the most commonly used FFmpeg commands. mp4 Re: understanding DTS PTS. preroll Amount of time to preroll video in seconds. It seems that it has to do with the data structure that are not compatible. >> This, instead, is the codec time_base >> AVFormatContext. 0*PTS" lowerspeed. >> The frames are being read in I P B B. How do I use CBR mode in MPEG2 codec? Post by Videogamer555 » Sun Nov 17, 2013 6:11 am I know for example that the ATSC standard for broadcast TV uses the MPEG2 codec, and it must be set for Constant Bit Rate mode and it must be set for exactly 20000kbits/s. /scriptname ffmpeg 20 after ffmpeg first starts pressing a file. SetPTSContext * setpts = ctx->priv;. 15 setpts, asetpts. The above command only affects the input stream not output. Any suggestions welcome Your second suggestion seems to be only for used with the 'copy' directives. jpg (with the pattern "%04d") as output file. List output devices: ffmpeg -i test. I've done some digging in the code and found the offending statement. To install ffmpeg and some other packages on Ubuntu/Linux Mint, open the terminal and run these commands: I have been saying this for a few years now. ignidx FFmpeg Formats Documentation Options may be set by specifying -option value in the FFmpeg tools, or by setting the value explicitly in Generate PTS We use cookies for various purposes including analytics. error: [wtv @ 06cd9020] pts (12251328) < dts (13051330) in stream 2. mp4 -pix_fmt yuv420p -vsync 0 -r 30 output_30. If set to 1, the filename will always be interpreted as just a filename, not a pattern, and the corresponding file will be continuously overwritten with new images. 04 or newer can just install ffmpeg from the repository. In our testbed, FFmpeg works as an encoding and decoding front-end, Any tipps for capturing RTP and the "first pts value must set" error??? My command line: C:\tmp>ffmpeg -i template_ffmpeg. Compute PTS and DTS correctly to sync audio and video ffmpeg C++ I am trying to mux H264 encoded data and G711 PCM data into mov multimedia container. the frame content seems to be correct however get_best_effort_timestamp returns 0 for the first frame after seeking instead of the correct frame timestamp. mpg -vf Re: PTS meaning in ffmpeg. Thanks, for going over the frame reordering. , but the way it is set you do not need to know ffmpeg -i input. * decoding: set by libavformat list_devices If set to true, print a list of devices and exit. Stack Exchange Network. ffmpeg set pts

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