31 May

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

• 23:43
  How to start video recording of tests via ffmpeg, in headless mode - Vitalii Newest 'ffmpeg' Questions - Stack Overflow
  I have rspec tests that need to run in headless browser mode, the system macos 10.15. I want to record videos using ffmpeg without starting the browser. On linux systems, there is xvfb, but there is no macos version. Can you tell me how I can create a virtual screen, run tests, and save them in ffmpeg ? This is my command for record video - ffmpeg -f avfoundation -i '1' -c:v libx264 -preset ultrafast ~/Desktop/output.mkv, where avfoundation -i '1' is my screen number, but i need run virtual screen. I understand that there is a selenoid, (...)
• 23:19
  Can ffmpeg transcode an audio track and add it as a second audio track at the same time, or if not, how to do it as separate commands? - wb6vpm Newest 'ffmpeg' Questions - Stack Overflow
  A bit of history. I am using Plex as my media server, but for reasons unknown, it has issues transcoding the DTS-HD MA 7.1 audio to EAC3 stereo and keeps buffering (the server has plenty of horsepower on all fronts, CPU/RAM/drive space & speed, gigabit networks connections for all devices. The playback device (TCL Roku TV, with a 3rd party soundbar connected via HDMI ARC) doesn't support the built-in 7.1 audio, so I get silence if I play it back directly by putting the file on a USB stick. Also, I am by no means a ffmpeg guru, I figured out what I do know by Google (...)
• 21:57
  moviepy ruining video after combining them - jjakeryan Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to make a program that downloads videos from TikTok and combines all the separate videos into one .mp4 file and moves the final video to a folder on my desktop. I've been able to make it download all the videos and when I watch the separate videos they play fine however when I combine the videos some of the videos are messed up and look like this but the audio is fine. #slecting all .mp4 files video_files = glob.iglob("*.mp4") print(video_files) clips = [] for clip in video_files: # For each mp4 file name  (...) --
• 21:43
  How to create chunks of videos (.ts) and .m3u8 file from a mp4 video? - Nafisur Ahmed Newest 'ffmpeg' Questions - Stack Overflow
  I need to create chunks of videos (.ts) of fixed duration (say 5 or 10 seconds) from a mp4 video. And also I need the chunks in different formats (260p, 480p, 720p, 1080p). I'm able to create the chunks and m3u8 using the command below: ffmpeg -i input.mp4 -g 60 -hls_time 10 out.m3u8 but not able to create for different resolutions as mentioned above.
• 20:55
  How can i merge 2 videos with audio using ffmpeg? - Easy Tricks For Android Newest 'ffmpeg' Questions - Stack Overflow
  I tried this command ffmpeg -f concat -i mylist.txt -c copy output.mp4 (the mylist.txt contains this file '1.mp4' file '2.mp4') but output.mp4 has no audio. please help me
• 18:27
  Editing and restreaming rtmp stream in python - REgorion Newest 'ffmpeg' Questions - Stack Overflow
  There is an nginx rtmp lan server that is being streamed from OBS. There is a Python script that determines whether there is nsfw content on the screen based on a screenshot. The result is calculated in real time and sent over tcp. The task of another script is to Get the result over tcp - it can do this. Receive a stream from an rtmp lan server and overlay the video stream a second before nsfw content appears. In theory, I need to receive the stream and send it with a delay of a second, and if the signal comes over tcp, then overlay the video. I don't understand how I can (...)
• 17:18
  FFmpeg and QuickTime Player dimensions of video do not match [duplicate] - GRS Newest 'ffmpeg' Questions - Stack Overflow
  I have a video.mp4, which I scaled using FFmpeg to get out.mp4. The new video has the following probe: 'streams': ['index': 0, 'codec_name': 'h264', 'codec_long_name': 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10', 'profile': 'High', 'codec_type': 'video', 'codec_time_base': '1/50', 'codec_tag_string': 'avc1', 'codec_tag': '0x31637661', 'width': 886, 'height': (...) --
• 14:39
  Using ffmpeg to change video framerate without video quality loss and keep audio? - Johnny Newest 'ffmpeg' Questions - Stack Overflow
  I recorded some game videos with my Samsung Galaxy S7 device. When I now add these videos to blender 3d in video editing, I get different video and audio frames. I think, that this is an fps problem, because on every recorded video I get different fps: 59.01, 59.80 etc. Now I want to change frame rate on all videos to 60 fps without video quality loss and keeping audio. So I would not have any problems in video editing. Does somebody have any (...)
• 11:45
  ffmpeg: memory not freed on multi-threaded decoding - toby_e Newest 'ffmpeg' Questions - Stack Overflow
  I am developing a video player based on the ffmpeg libraries and have run into a rather strange memory increase or failure to decrease memory when unloading a video file. My code is based on various examples of demuxing, decoding and scaling video and audio frames - but with the excecption that i have put each of these steps into seperate threads to avoid waiting for time-consuming calls. Everything works perfectly, but Visual Studio shows that Process Memory does not decrease when i call the various avclose and avfree calls. My Windows task manager confirms these memory increases that (...)
• 11:41
  split video and keep pts unchanged - nobody0day Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to split a big video into small ones and keep the pts unchanged in small videos. Any ideas on how to program with ffmpeg library in c programming language. My first thought is that split video around the I-frame and keep the I-frame's pts as first_pts of next video but it didn't works.
• 03:19
  Process takes more time to complete in successive iterations - user1306470 Newest 'ffmpeg' Questions - Stack Overflow
  I have the following code and I'm noticing that the process takes more time to do its thing in each iteration. The line myProcess.StandardOutput.BaseStream.CopyTo(stream); takes around 200ms in the first iteration and in the 500th iteration it takes 3000ms. I'm assuming this line awaits untils there's something in the output buffer to read from, so it follows that myProcess takes increasingly more time to push data to the output stream in every iteration, why does this happen? How can I fix this? (...)

30 May

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

• 22:55
  Node Media Server not streaming when I change ffmpeg argv - joao.jlf4 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to change the ffmpeg spawn argv on Node Relay Session but it does'nt work beacuse node media server finishes the stream, my argv array: let argv = [ '-fflags', 'nobuffer', '-i', this.conf.inPath, '-b:v', '2000k', '-b:a', '128k', '-c:v', 'libx264', '-preset veryfast', // '-c', // 'copy', '-f', format,  (...)
• 21:39
  How to properly pass an asset FileDescriptor to FFmpeg using JNI in Android - William Seemann Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to retrieve metadata in Android using FFmpeg, JNI and a Java FileDescriptor and it isn't' working. I know FFmpeg supports the pipe protocol so I'm trying to emmulate: "cat test.mp3 | ffmpeg i pipe:0" programmatically. I use the following code to get a FileDescriptor from an asset bundled with the Android application: FileDescriptor fd = getContext().getAssets().openFd("test.mp3").getFileDescriptor(); setDataSource(fd, 0, 0x7ffffffffffffffL); // native function, shown below Then, in my native (In C++) code I get the (...) -- FileDescriptor, pipe protocol, FFmpegMediaMetadataRetriever
• 21:07
  How to read raw audio data using FFmpeg? - Yousef Alaqra Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use this command to get the audio stream using UDP: ffmpeg -i udp://192.168.1.1:6980 -acodec copy I got an error when I execute it, which says: [udp ⓐ 00000157a76b9a40] bind failed: Error number -10048 occurred udp://192.168.1.1:6980: I/O error What's the meaning of this error? Update: I was able to read raw audio data using FFmpeg and output into a wave file, using the following command: ffmpeg -f u16be -ar 44100 -ac 2 -i 'udp://127.0.0.1:1223' output.wav The (...)
• 20:26
  How to convert ffmpeg complex_filter to ffmpeg-python - v78 Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to learn to convert ffmpeg command line background blur filter to ffmpeg-python format. '-lavfi' and [0:v]scale=ih*16/9:-1,boxblur=luma_radius=min(h\\,w)/20:luma_power=1:chroma_radius=min(cw\\,ch)/20:chroma_power=1[bg];[bg][0:v]overlay=(W-w)/2:(H-h)/2,crop=h=iw*9/16 Basic examples from https://github.com/kkroening/ffmpeg-python are good to learn simple tricks, but How to learn to the full transformation syntax? -- https://github.com/kkroening/ffmpeg-python
• 19:27
  ffmpeg concat: "Unsafe file name" - sers Newest 'ffmpeg' Questions - Stack Overflow
  Trying to convert a bunch of mts-files into a big mp4-file: stephanⓐrechenmonster:/mnt/backupsystem/archive2/Videos/20151222/PRIVATE/AVCHD/BDMV$ ~/bin/ffmpeg-git-20160817-64bit-static/ffmpeg -v info -f concat -i Any ideas what goes wrong here? What does the term "unsafe file" mean in this context?
• 18:30
  ffmpeg merge_outputs not outputting the final file - Ethanopp Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to combine multiple independent instrument audio tracks (.ogg files) from a song into 1 final 'song' file that has them all playing simultaneously. The following properly outputs each independent .mp4 file, but once it's done running, I don't see a final file with everything combined... import ffmpeg import os os.environ['path'] = 'C:\\\\Program Files (x86)\\\\ffmpeg\\\\bin' song = ffmpeg.input('song.ogg').output('song.mp4').audio drums = (...)
• 15:58
  print list of video files containing "x" string in meatadata - Windows 10 [closed] - Harry Sanderson Newest 'ffmpeg' Questions - Stack Overflow
  I have a large collection of video files which have the contents of the video listed in one of the metadata fields. for example one video might have "trees, birds, cars", another might have "birds, building, person". I'm looking for a command to print the filenames of all the videos that contain a specific string ie "birds" to a .txt file where the names would be separated by a comma so, "video1.mov, video2.mov" and so on. I know very little about this sort of problem, is it the sort of thing that can be done directly in windows cmd line, or would it require a (...)
• 17:38
  FFmpeg bind failed: Error number -10048 occurred udp://192.168.1.1:6980 - Yousef Alaqra Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use this command to get the audio stream using UDP: ffmpeg -i udp://192.168.1.1:6980 -acodec copy I got an error when I execute it, which says: [udp ⓐ 00000157a76b9a40] bind failed: Error number -10048 occurred udp://192.168.1.1:6980: I/O error What's the meaning of this error?
• 16:22
  Discord bot: Fix ‘FFMPEG not found’ - Travis Sova Newest 'ffmpeg' Questions - Stack Overflow
  I want to make my Discord bot join voice chat but every time I make it I get a error into log(cmd) saying, FFMPEG not found, please help me. Picture of the error: This is the code: client.on('message', message => // Voice only works in guilds, if the message does not come from a guild, // we ignore it if (!message.guild) return; if (message.content === '/join') // Only try to join the sender's voice channel if they are in one themselves if (message.member.voiceChannel)  (...) --
• 14:59
  Overlay text using FFmpeg command in android programmatically - Daniel Nyamasyo Newest 'ffmpeg' Questions - Stack Overflow
  I need to know what is the issue with my FFmpeg command for overlaying text to a video in android. command = new String[]"ffmpeg", "-i", original_path, "-vf", "drawtext=text='SiteName.local': fontsize=18: fontcolor=white: x=10:y=h-th-10", "-acodec", "copy", "-y", dest.getAbsolutePath(); I am trying to create a video with a text overlay. However, i'm getting an error [NULL ⓐ 0xea699600] Unable to find a suitable output format for 'ffmpeg' ffmpeg: Invalid argument I have tested for the input file and output (...)
• 14:26
  Discord Music Bot joins voice channel, light up green but didnt has any audio. Worked well for 2 weeks before. No errors in console - FeX Newest 'ffmpeg' Questions - Stack Overflow
  I coded a bot with node.js. I used the example by Crawl for his music bot. I did everything similar to him. After I finished my build everything worked. Every other command and the play command. But now after 2 weeks the bot joins the voice channel, light up green but has no sound. I updated ffmpeg, ⓐdiscordjs/opus, ffmpeg-static and downloaded the completed version from ffmpeg but the bot still has no audio. The queue, volume, nowplaying, skip, shuffle, loop everything works. But after I got the video or playlist with the play command the bot only joins light up green but has no audio. (...)
• 13:14
  FFMPEG - Green cast with Splash image in video - rossmcm Newest 'ffmpeg' Questions - Stack Overflow
  I'm using FFMPEG to produce a video consisting of a single monchrome JPG image: ffmpeg -y -loop 1 -framerate 30 -t 5 -i SplashBW.jpg Splash.mp4 There are two issues with the resulting video: When viewed with VLC it has a green cast When viewed with "Film and TV" (I suspect this is the Windows 10 viewer - the association for MP4 files seems to have been hijacked on my PC) it has a green cast and a predominant flickering every 0.5 seconds or so. When viewed with Irfan View it looks fine. I don't know whether (...) -- B&W image, Resulting video, screen grab of video playing on my PC
• 09:59
  Having ffmpeg add a repeating text overlay on a video - Caius Jard Newest 'ffmpeg' Questions - Stack Overflow
  I'm looking to create an overlay that cycles through the characters in a string over and over. I've succeeded in using a sendcmd file to put A, B, C, D, E on the first 5 seconds of a video 0 drawtext reinit 'text=A'; 1 drawtext reinit 'text=B'; 2 drawtext reinit 'text=C'; 3 drawtext reinit 'text=D'; 4 drawtext reinit 'text=E'; But it doesn't cycle and I haven't been able to find a way to make it, because sendcmd looks like it just takes a simple timecode. I could make a command (...)
• 08:11
  FFmpeg API example (encode_video.c) does not work correctly - NewbieCoder Newest 'ffmpeg' Questions - Stack Overflow
  I am using the official encode_video.c example to test if FFmpeg works correctly for me. I got the pre-built windows edition from ffmpeg.zeranoe.com/builds. It is built already with libx264 and other external libraries. I got both dev and shared editions and added the DLLs, header files and libs accordingly in Visual Studio. Now the encode_video.c example does not work correctly. What I tried: I compiled the example and run it on many different file formats and codecs such as the following. First I tried all of these file formats (...) -- encode_video.c, ffmpeg.zeranoe.com/builds, https://imgur.com/a/AHLQwuK
• 07:58
  python3.6 ffmpeg call MacOSX (closed) - Awazleon Newest 'ffmpeg' Questions - Stack Overflow
  I'm using Python 3.6 on MacOSX. I would like to use FFmpeg as Python sub-process. Everything works fine when using the OSX embedded Python 2.7 but using 3.6, this doesn't work. I get an error message because it doesn't find FFmepg: raise FFExecutableNotFoundError("Executable '0' not found".format(self.executable)) ffmpy.FFExecutableNotFoundError: Executable 'ffmpeg' not found I tried with ffmpy but I also got the same result by invoking FFmpeg directly: >>> from subprocess import call >>> (...)
• 05:44
  Is it possible to create a hls master playlist with .ts chunks? - Pallav Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to create a hls master playlist with .ts chunks(of different playlists) instead of creating it with different variants playlist in nginx using ffmpeg, Can one do that? if not is there any way I can immediately create the master playlist as soon as nginx receives the first .ts chunk? Thanks, your help is much appreciated.
• 02:59
  how to split video to multi scenes with ffmpeg - Abdelmelek Newest 'ffmpeg' Questions - Stack Overflow
  i need to make for loop to extract scenes from imported video each scene i will give it a name like vid1.mp4 vid2.mp4 ... # Resort the scenes according to the time they occurred self.sorted_scenes = sorted(self.sorted_scenes, key=lambda scene_key: scene_key.frame_number) strt = datetime.time(0,0,0,0) sname = "vid" ff = "C:/Users/user/Desktop/segmentation/1.mp4" print(f"These are the top n scene timestamps:") for scene in self.sorted_scenes: i = 0 print(f"- scene.time_stamp") endt = scene.time_stamp command = f"ffmpeg -i ff --ss (...)
• 01:33
  Discord bot js Bot has no audio after joining with play command. No errors in console or chat - FeX Newest 'ffmpeg' Questions - Stack Overflow
  I coded a bot with node.js. I used the example by Crawl for his music bot. I did everything similar to him. After I finished my build everything worked. Every other command and the play command. But now after 2 weeks the bot joins the voice channel, light up green but has no sound. I updated ffmpeg, ⓐdiscordjs/opus and ffmpeg-static but the bot still has no audio. The queue, volume, nowplaying, skip, shuffle, loop everything works. But after I got the video or playlist with the play command the bot only joins light up green but has no audio. function play(guild, song)  (...)
• 01:00
  very low latency streaminig with ffmpeg using a webcam - userDtrm Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to configure ffmpeg to do a real-time video streaming using a webcam. The ffmpeg encoder command I use is as follows. ffmpeg -f v4l2 -input_format yuyv422 -s 640x480 -i /dev/video0 -c:v libx264 -profile:v baseline -trellis 0 -subq 1 -level 32 -preset superfast -tune zerolatency -me_method epzs -crf 30 -threads 0 -bufsize 1 -refs 4 -coder 0 -b_strategy 0 -bf 0 -sc_threshold 0 -x264-params vbv-maxrate=2000:slice-max-size=1500:keyint=30:min-keyint=10: -pix_fmt yuv420p -an -f mpegts udp://192.168.1.8:5001 The ffplay command used to display the video (...)
• 00:38
  How to use ffmpeg lt(mod) and gte(mod) [closed] - Unlockdtdd Newest 'ffmpeg' Questions - Stack Overflow
  I want to mix and swap several second of my video. I think overlay can work but I still don't know how to work with it.
• 00:10
  generate extract number of thumbnails with ffmpeg from a video - Umair Newest 'ffmpeg' Questions - Stack Overflow
  I want to get extract number of thumbnails for a video with ffmpeg for example 5-6 how can I do that? the following command will generate 1 i would like 5-6 shell_exec("ffmpeg -ss 01:23:45 -i input.mkv -vframes 1 -q:v 2 output.jpg");