20 juillet

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 06:55
  ffplay / ffmpeg with audio and video filters - user10104150 Newest 'ffmpeg' Questions - Stack Overflow
  i tried to modify a already existing code for ffplay for hours, but I could not get it. I could not find a manual for vertical and horizontal stacking parameters. I’m always getting invalid argument errors when I try to adopt it to my needs. So I’m asking here for help. My idea is based on that: ffplay / ffmpeg setup table with audio and video filters The working code that I modified a little but want to modify further without luck is: ffplay -f lavfi \\ "amovie=in.mp4,asplit=3[sv][eb][av]; \\ [sv]showvolume=b=4:f=0:ds=log:c=VOLUME:w=720:h=68[sv-v]; \\ (...) -- Link to image how I\'d like the layout to be
• 06:16
  Aforge VideoSourcePlayer is too slow - Jasim Khan Afridi Newest 'ffmpeg' Questions - Stack Overflow
  I am receiving continuous frames from a video device which I convert into image and then play them as live video on WPF application. I have used picture box control for this purpose. It works for 1 or two video streams. But as soon as I add more. It shows clear lag in performance and frames per second reduce drastically. I then tried using Aforge's VideoSourcePlayer control. I implemented IVideoSource that receives images and pushes them to VideoSourcePlayer via NewFrame?.Invoke(this, new NewFrameEventArgs(image)) and I am expecting them to be played seemlessly. Which is not the case. It (...)
• 03:30
  OpenCV video capture - output even potentially corrupt frames - J. S. Newest 'ffmpeg' Questions - Stack Overflow
  In FFmpeg, there is a flag "output_corrupt" that allows the command to output even corrupted frames. I am sending h264 stream to a server where its first few frames are corrupted. By setting "output_corrupt" flag in my FFmpeg command, I am able to view the live stream. I can see the live stream by piping FFmpeg data to OpenCV VideoCapture (i.e. cv2.VideoCapture('/dev/stdin')) Note: since my plan is to run CV algorithms on those frames, I need to be able to run it on OpenCV. However, by not directly sending the data through VideoCapture, it unavoidably causes some latency issue. The (...)
• 03:18
  How make an API for android from ffmpeg source to join multiple mp3? [on hold] - Nam Newest 'ffmpeg' Questions - Stack Overflow
  I'm researching on ffmpeg source to make an API that help me joining multiple mp3 file. But I don't know what's exactly functions in ffmpeg which I can use for my API.

19 juillet

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 23:51
  ffmpeg h264_amf usage in C++ - plq Newest 'ffmpeg' Questions - Stack Overflow
  I want to use h264_amf encoder in my C++ code. In FFmpeg command-line tool I can write ffmpeg -i in_to_tree_1080p50.y4m -c:v h264_amf out.mp4 And this works fine for me, but when I try to find this encoder by using avcodec_find_encoder_by_name I can't find it. My full code: static AVCodec* select_codec() static std::array codecs = "h264_nvenc", "h264_amf", "h264_omx", "h264_v4l2m2m", "h264_vaapi", "h264_videotoolbox", ; for (const char* name : codecs) if (auto* codec = avcodec_find_encoder_by_name(name)) std::cout The output of this function is always Using default h264 encoder. Did (...)
• 23:12
  Can ffmpeg wait until new input? - Metin Akkın Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg for video streaming, but I have images and images convert to video then streaming. I want encoder wait the image but ffmpeg starts and makes all image then close.

git.videolan.org Git - ffmpeg.git/rss log http://git.videolan.org/?p=ffmpeg.git;a=summary

• 02:28
  lavfi/af_afir,af_aiir: Remove a variable that is always -1. - Carl Eugen Hoyos git.videolan.org Git - ffmpeg.git/rss log
  lavfi/af_afir,af_aiir: Remove a variable that is always -1. Fixes two warnings: libavfilter/af_afir.c:194:45: warning: assuming signed overflow does not occur when assuming that (X - c) > X is always false [-Wstrict-overflow] int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1; ~~~~~~~~~~~~^~~~ libavfilter/af_aiir.c:689:45: warning: assuming signed overflow does not occur when assuming that (X - c) > X is always false [-Wstrict-overflow] int dx = FFABS(x1-x0), sx = x0 < x1 ? 1 : -1; ~~~~~~~~~~~~^~~~ [DH] libavfilter/af_afir.c [DH] (...)

Newest 'ffmpeg' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/ffmpeg

• 22:50
  Using ffmpeg, frame between animation loop - Celil Şahin Newest 'ffmpeg' Questions - Stack Overflow
  again me :) I could not reach the end result. waiting for help for a different problem. 4 sec normal and 3 sec animation, until the end of the video. animation: random (left-right-top-bottom) 1.5 sec and 1.5 sec orjinal position overlay 0. Total 3 sec and 4 sec normal, again random position. if random it is not, Fixed value. Plss ⓐGyan, I really need. --
• 20:07
  Using C# and ffmpeg to rip audio from an .mp4, ffmpeg stuck until closing the calling application - user3806186 Newest 'ffmpeg' Questions - Stack Overflow
  I happened to find this answer: https://stackoverflow.com/questions/44981454/c-sharp-extract-mp3-file-from-mp4-file#= And it seems to work, However, the conversion process gets stuck, and it only resumes after I have closed the application that called ffmpeg to run. The following code is responsible for the launch of ffmpeg: (The commented lines are just from testing on how to fix the hanging) public static string ConvertToMp3(string inputFile, string outputFile = "extracted_audio.mp3") Console.WriteLine("Converting mp3 to " + Path.GetFullPath("extracted_audio.mp3")); string mp3out = (...)
• 20:02
  How do I properly enable ffmpeg for matplotlib.animation? - spanishgum Newest 'ffmpeg' Questions - Stack Overflow
  I have covered a lot of ground on stack so far trying to get ffmpeg going so I can make a timelapse video. I am on a CentOS 7 machine, running python3.7.0a0. python3 >>> import numpy as np >>> np.__version__ '1.12.0' >>> import matplotlib as mpl >>> mpl.__version__ '2.0.0' >>> import mpl_toolkits.basemap as base >>> base.__version__ '1.0.7' I found this github gist on installing ffmpeg. I used the chromium source, and installed without a prefix option (using the default). I have confirmed that ffmpeg is installed, although I don't know anything about testing whether it works. which (...) -- this github gist, http://matplotlib.org/examples/animation/basic_example_writer.html, https://trac.ffmpeg.org/wiki/CompilationGuide/Centos, https://mailman.videolan.org/pipermail/x264-devel/2015-February/010971.html, http://linoxide.com/linux-how-to/install-ffmpeg-centos-7/
• 20:57
  Split 2 video FFMpeg - Евгений Бреус Newest 'ffmpeg' Questions - Stack Overflow
  can you help me split 2 videos enter image description here ffmpeg -i input1.mp4 -i input2.mp4 -filter_complex "[0:v][1:v]vstack[v];[0:a][1:a]amerge=inputs=2[a]" -map "[v]" -map "[a]" -ac 2 output.mp4 Don't work My complete log C:\\Users\\forumrulez\\Desktop\\POST>ffmpeg -i input1.mp4 -i input2.mp4 -filter_complex "[0:v][1:v]vstack[v];[0:a][1:a]amerge=inputs=2[a]" -map "[v]" -map "[a]" -ac 2 output.mp4 ffmpeg version N-91447-g0bd48ab2d9 Copyright (c) 2000-2018 the FFmpeg developers built with gcc 7.3.1 (GCC) 20180709 configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-bzlib (...) -- enter image description here
• 20:23
  Implementing a multiple input filter graph with the Libavfilter library in Android NDK - gookman Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use the overlay filter with multiple input sources, for an Android app. Basically, I want to overlay multiple video sources on top of a static image. I have looked at the sample that comes with ffmpeg and implemented my code based on that, but things don't seem to be working as expected. In the ffmpeg filtering sample there seems to be a single video input. I have to handle multiple video inputs and I am not sure that my solution is the correct one. I have tried to find other examples, but looks like this is the only one. Here is my code: AVFilterContext **inputContexts; (...)
• 18:31
  Memory leak when using av_frame_get_buffer() - Alec Matthews Newest 'ffmpeg' Questions - Stack Overflow
  I am making a simple video player with ffmpeg. I have noticed that there is a memory leak originating in libavutil. Because ffmpeg is a mature library I assume that I am allocating a new frame incorrectly. The documentation is also vague about freeing the buffer that is created when you call av_frame_get_buffer(). Below is the code I am using to decode the video and queue it up for display on the UI thread. DWORD WINAPI DecoderThread(LPVOID lpParam) AVFrame *frame = NULL; AVPacket pkt; SwsContext *swsCtx = NULL; UINT8 *buffer = NULL; INT iNumBytes = 0; INT result = 0; frame = (...)
• 18:25
  Seeking a frame in libav - Oier Lauzirika Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to decode a frame (pseudo-random number-th) using libav. However I can't get it to work properly using the information gathered from the following post. Right now my code seeks for the first keyframe before the desired frame (actually timestamp), and decodes all frames starting on that keyframe up to the desired frame. This leads into very poor performace (even using all CPU cores). In my case this is not aceptable as I need to decode video in real-time. Here is the code: int64_t seekTarget=av_rescale_q(us, AV_TIME_BASE_Q, videoFile->formatCtx->streamsvideoFile->time_base); (...)
• 18:07
  FFMpeg keep audio when adding date/time to video file - user567424 Newest 'ffmpeg' Questions - Stack Overflow
  We have a video file we have recorded and have the ffmpeg script below which adds the date/time to it. However, the output file video loses the audio part. How do we get it to pull that over from the input video file as well, so the audio stays in place? ffmpeg.exe -y -i "input.mp4" -ss 00:00:00 -t 00:02:17 -an -vcodec libx264 -profile:v baseline -level 13 -b:v 2000k -vf "drawtext=fontcolor=white:fontsize=16:fontfile="/Windows/Fonts/arial.ttf":\\text=12-07-2018-- : box=1:boxcolor=blackⓐ0.3:x=(w-text_w-10):y=(h-text_h-5):timecode=' 14:36:47\\;00':rate=30000/1001" (...)
• 17:01
  Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (360p.m3u 8) has not been used for any stream. - Marc Archenault Newest 'ffmpeg' Questions - Stack Overflow
  I am receiving this warning from ffmpeg. The job runs and all the videos seem to output correctly. I have 2 hls, 1 mp4 with overlay + A single thumbnail. The warning: Stream #1:0: Video: png, rgba(pc), 500x38, 25 tbr, 25 tbn, 25 tbc Codec AVOption b (set bitrate (in bits/s)) specified for output file #0 (360p.m3u 8) has not been used for any stream. The most likely reason is either wrong type (e.g. a video option with no video streams) or that it is a private option of s ome encoder which was not actually used for any stream. The windows batch command: ffmpeg -loglevel info -threads 2 (...)
• 16:16
  ffmpeg concat and preserve metadata streams - Andrew Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to concat multiple files that are the result of a GoPro Hero6 splitting movies to avoid the FAT 4GB limit. ffmpeg works great for this purpose but I need the telemetry data that is encoded in the metadata streams, and ffmpeg by default doesn't seem to preserve this. Using the ffprobe command you can see that the source videos have: Stream #0:3(eng): Data: none (gpmd / 0x646D7067), 36 kb/s (default) Metadata: creation_time : 2018-07-15T16:16:26.000000Z handler_name : GoPro MET I know from research that this is the stream I need (although I'd like to be able to copy all (...)
• 16:00
  Timeout for MMSH protocol in FFmpeg - Iman Newest 'ffmpeg' Questions - Stack Overflow
  I play a live streaming with VLC and I save the stream to a mp4 file with FFmpeg. The FFmpeg command is: ffmpeg -y -i mmsh://x.x.x.x:8080 -vcodec copy -acodec copy saved_stream.mp4 When I close the stream it takes 10 seconds to exit. How can I set 3 seconds timeout instead of 10? Neither -timeout nor -stimeout not working here.
• 14:57
  AVFrame: How to get/replace plane data buffer(s) and size? - user10099431 Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on gstreamer1.0-libav (1.6.3), trying to port custom FPGA based H264 video acceleration from gstreamer 0.10. The data planes (YUV) used to be allocated by a simple malloc back in gstreamer 0.10, so we simply replaced the AVFrame.data[i] pointers by pointers to memory in our video acceleration core. It seems to be MUCH more complicated in gstreamer 1.12. For starters, I tried copying the YUV planes from AVFrame.data[i] to a separate buffer - which worked fine! Since I haven't seen an immediate way to obtain the size of AVFrame.data[i] and I recognized that data[0], data[1], (...)
• 13:36
  Pipe input in to ffmpeg - AbstractDissonance Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use ffmpeg to decode audio data. While it works to load from a file, I would like to avoid using files because to do so, means I would have to use a temporary. Instead, I'd like to pipe in the data(which I've previously loaded) using stdin. Is this possible? e.g., Manually load mp3 file Pipe it in to the ffmpeg spawned process Get raw output (it should work with ffprobe and ffplay also)
• 13:06
  Ghosting with ffmpeg lenscorrection - Anmol Mishra Newest 'ffmpeg' Questions - Stack Overflow
  AE has optics correction that offers the correct mapping for flat 3d to 180 vr 3d. This is for the 90 FOV on Oculus Go and Gear VR. https://imgur.com/PbSD7mg I tried to do this using lenscorrection in ffmpeg but ended up with ghosting and a cropped image.. https://imgur.com/SKw1ycx This was the command used ffmpeg -i /Volumes/500GB/Untitled\\ 01.mov -vf lenscorrection=k1=-0.6:k2=0.55 -crf 18 out.mp4 Any ideas why ? -- https://imgur.com/PbSD7mg, https://imgur.com/SKw1ycx
• 11:49
  Is there a way to remove GoPro fisheye using ffmpeg - user4223883 Newest 'ffmpeg' Questions - Stack Overflow
  It seems possible to compensate the fisheye distortion using ffmpeg thanks to the lenscorrection filter: ffmpeg -i in.mp4 -vf "lenscorrection=cx=0.5:cy=0.5:k1=-.25:k2=-.25" out.mp4 What values for k1 and k2, particularly for a gopro? Is there a way to compute them? -- lenscorrection
• 11:14
  FFmpeg - Add water mark image to video or stream not working - Abdessamad Newest 'ffmpeg' Questions - Stack Overflow
  I want add a logo to video and stream with ffmpeg for video : ffmpeg –i viddeo.mp4 -i logo.png -filter_complex "overlay=main_w-overlay_w-10:main_h-overlay_h-10" bottom_left.mp4 for stream : ffmpeg -re -i http://server.com/live.m3u8 -i logo.png -filter_complex "overlay=main_w-overlay_w-10:main_h-overlay_h-10" -c:v copy -c:a aac -ar 44100 -ab 128k -ac 2 -strict -2 -flags +global_header -bsf:a aac_adtstoasc -bufsize 1500k -f flv rtmp://test:1935/live/kky4zhl but it not working for video i get this error : Cannot find a matching stream for unlabeled input pad 1 on filter Parsed_overlay_0 (...) --
• 10:37
  What function in ffmpeg source to join 2 file mp3 to one file mp3? [on hold] - Nam Newest 'ffmpeg' Questions - Stack Overflow
  I have a trouble that how I can make a function on C file that help me join two audio file to one. But i can not find how I using what function in ffmpeg source. I want build .so file to use on android. Help me please!
• 10:40
  How to muxing a HEVC Annex B raw video file into a TS containter without changing its start code with ffmpeg - Adam Estel Newest 'ffmpeg' Questions - Stack Overflow
  I researched for a while and had read Multiplex a HEVC-Video into a MPEG-Transportstream with FFMPEG and Convert H.264 Annex B to MPEG-TS but non of these answer my question. I tried ffmpeg -y -f hevc -i out.h265 -c copy -f mpegts output1.ts but it got 2 errors: [mpegts ⓐ 00000230d3bad2c0] Timestamps are unset in a packet for stream 0. This is deprecated and will stop working in the future. Fix your code to set the timestamps properly. [mpegts ⓐ 00000230d3bad2c0] first pts value must be set av_interleaved_write_frame(): Invalid data found when processing input How can i wrap a HEVC (...)
• 10:07
  ffmpeg merge audio of two videos - Venom Newest 'ffmpeg' Questions - Stack Overflow
  i have a couple of videos and i want to make them smaller to save some space... therefore i really would like to merge the audiotracks of file1 into file2 so that i can later on delete file1 because the picture content of both videos is the same... Is there a way to accomplish that with ffmpeg? With this cmd i would have 2 video/audio tracks in one file so this is NOT what i want. ffmpeg -i file1.mp4 -i file2.mp4 -c copy output.mp4 i only want the audio of file1 and the video and audio of file2 merge into one file... (...)
• 00:10
  Stitching 2 videos together side-by-side with ffmpeg in Android [on hold] - A. Munny Newest 'ffmpeg' Questions - Stack Overflow
  I am currently writing an app for Android that is supposed to take two video clips and stitch them together side-by-side into a single file (such that the user can download a single video file that shows these two side-by-side videos playing simultaneously). I was planning on using ffmpeg to achieve this, but could not figure out how to do this. Does anyone know how to achieve something like this, if at all possible? Additionally, if there is a way to get it done easier using something other than ffmpeg, that solution would also be greatly appreciated. Thank (...)
• 08:08
  Multiple subtitle tracks are not encoded into mov file - David Rees Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to compile a mov file with multiple audio tracks and subtitle tracks to match. Unfortunately only the first subtitle track appears in Quicktime (Intended for Apple Devices). Looking at it compile- it appears that the second subtitle track is not being encoded using the tx3g format Command ffmpeg \\ -i input1.mp3 \\ -i input2.mp3 \\ -loop 1 \\ -i black.png \\ -i eng.srt -i zh.srt \\ -map 0 -map 1 -map 2 -map 3 -map 4 \\ -c:a aac \\ -c:v libx264 -pix_fmt yuv420p -shortest \\ -c:s:0 mov_text \\ -tag:s:s:0 tx3g \\ -c:s:1 mov_text \\ -tag:s:s:1 tx3g \\ -metadata:s:s:0 language=eng (...)
• 08:06
  ffmpeg sidedata or metadata per frame - Dan Gordon Newest 'ffmpeg' Questions - Stack Overflow
  I'm new to C and struggling a bit with pointers and the data structors... I'm trying to add either some side data or metadata per frame using the FFMpeg encoding example. (https://ffmpeg.org/doxygen/trunk/encode_video_8c-example.html) Here's what I have tried so far: /* encode 1 second of video */ for (i = 0; i height; y++) for (x = 0; x width; x++) frame->data[0]y * frame + x] = x + y + i * 3; /* Cb and Cr */ for (y = 0; y height/2; y++) for (x = 0; x width/2; x++) frame->data[1]y * frame + x] = 128 + y + i * 2; frame->data[2]y * frame + x] = 64 + x + i * 5; frame->pts = I; (...) -- https://ffmpeg.org/doxygen/trunk/encode_video_8c-example.html
• 07:56
  Repair Corrupted Video As True - parsa Newest 'ffmpeg' Questions - Stack Overflow
  I have a mp4 video file format on my server, it has 13MB size and has 00:03:09 duration time. I used this below command with ffmpeg on that: ffmpeg -i input.mp4 -c copy output.mp4 The output file has 224kb and has 00:00:08 duration time. I reencode the first file with this command too: ffmpeg -i input.mp4 -f mp4 output.mp4 And the output file has 194kb and has 00:00:08 duration time. I found that the video is corrupted, In playing video just shows the first frame, but when I seek to the forward, video plays as true. With wondershare software I transcode this video, and the output of (...)
• 06:08
  Output for ffmpeg - Zikry Kickbuttowski Newest 'ffmpeg' Questions - Stack Overflow
  Hello is there a way to output a saved image filename in a format such as yyyy-mm-dd_hrs:min:seconds_imagenumber? ie (img 2018-07-07_17:34:22_001). And the command has to include fps so that we are able to tweak the fps accordingly. The command also has to churn out images every second. Thanks!
• 04:48
  ffmpeg decode h264 to bgra raw video for fbdev - bkvaluemeal Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to stream video between two Raspberry Pis. I have video encoding working just fine, but the decoding is proving to be a challenge. No matter what I do it seems that the video is always in the yuv420p color space and thus incompatible with fbdev. My end goal is to display the raw video on /dev/fb0 without any X server running. Could someone point me in the right direction? This is the command I'm using to encode. ffmpeg -s 1280x720 -c:v h264_mmal -i /dev/video0 -b:v 1M -f mpegts (...)
• 01:01
  exist any fast way of join images to video faster? - newquest Newest 'ffmpeg' Questions - Stack Overflow
  Im using ffmpeg but takes more than 10minutes to convert 2000 images to mp4 ffmpeg -y -r 1/5 -f concat -safe 0 -i ffmcommand.txt -c:v libx264 -vf fps=25,format=yuv420p out22.mp4 how I could do faster please help me