19 August

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

• 05:16
  SDL Audio - Plays only Static Noise - bcpermafrost Newest 'ffmpeg' Questions - Stack Overflow
  Im having an issue with playing audio. Im new to the SDL World of things so im learning from a tutorial. http://dranger.com/ffmpeg/tutorial03.html As far as audio goes, i have exactly what he put down and didnt get the result he says I should get. In the end of the lesson he specifies that the audio should play normally. However all i get is excessively loud static noise. This leads me to believe that the packets arent being read correctly. However I have no idea how to debug or look for the issue. Here is my main loop for parsing the packets: while (av_read_frame(pFormatCtx, (...) -- http://dranger.com/ffmpeg/tutorial03.html
• 04:17
  Applying the same filter many times before output - Fabián Newest 'ffmpeg' Questions - Stack Overflow
  In my video there's an object that has shades of yellow (more orange-like) and has a solid yellow as background. I need to output all frames into a png sequence, using a color key filter to replace the yellow from the background: ffmpeg -ss 4 -i original.mp4 -t 2 -filter_complex "[0:v]colorkey=0xfff31b:0.125:0[ckout]" -map "[ckout]" colorkey-%d.png This removes all the yellow background. However, it leaves some pints of yellow behind, and some items are yellow-themed, so blending isn't an option for this scenario. In the end I need to get rid of 4 specific yellow-colors from the frames: (...)
• 04:08
  How can I overlay a video ontop of background image? - user11588722 Newest 'ffmpeg' Questions - Stack Overflow
  I have a command which creates waves ontop of a background image: ffmpeg -y -i "Assets/Screens/new.png" -i "Temp/video.mp4" -i "Temp/audio.mp3" -filter_complex "[2:a]showwaves=mode=cline:s=255x81:scale=sqrt:colors=0x222222,colorkey=0x000000:0.01:0.1,format=yuva420p[w];[v][w]overlay=240:594,scale=1920:1080[outv]" -map "[outv]" -map 2:a -movflags +faststart -c:v libx264 -c:a aac -preset veryfast -shortest "output.mp4" How can I also overlay a 1024x576px video at position 756:252? I have already included the video file as the second (1:v) input, but I can't seem to get the filters to play (...)
• 01:31
  ffmpeg - No NVENC capable devices found - Srikanth Bandaru Newest 'ffmpeg' Questions - Stack Overflow
  I am having difficulties in using the NVEnc capabilities of my RTX2070 on a Windows 10 machine. I've used "media-autobuild_suite" to compile FFmpeg and other libraries for my machine. I've updated my drivers to version 431.70 and I've also installed CUDA Toolkit 10.1 hevc_nvenc is working fine ffmpeg -hwaccel cuvid -i output/frames/%6d.png -c:v h264_nvenc -preset slow -tune animation -r 30 -pix_fmt yuv420p output.mp4 But h264_nvenc is throwing the below error No NVENC capable devices (...)

18 August

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

• 22:54
  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?

Revisions : jquery-mousewheel - GitHub http://github.com/brandonaaron/jquery-mousewheel/commits/master

• 22:03
  Don't clobber mouse offset properties if we don't adjust them - dmethvin Revisions : jquery-mousewheel - GitHub
  Don't clobber mouse offset properties if we don't adjust them Fixes #165
• 20:25
  Remove browserify test - dmethvin Revisions : jquery-mousewheel - GitHub
  Remove browserify test Fixes #150

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

• 20:11
  How to capture ffmpeg output in rails? - HelloWorld Newest 'ffmpeg' Questions - Stack Overflow
  I'm running a ffmpeg command to try to get the duration of a video file, the command is as follows... system('ffmpeg -i C:\\Users\\example\\Desktop\\video9.mp4 -f ffmetadata') When I run that line it outputs a lot of info to the rails console, including duration. But how would I capture that info so I can split it and grab the data I need? (I'm doing this inside a rails controller) When I run something like this... metadata = system('ffmpeg -i C:\\Users\\example\\Desktop\\video9.mp4 -f ffmetadata') puts metadata All it returns is (...)

Revisions : jquery-mousewheel - GitHub http://github.com/brandonaaron/jquery-mousewheel/commits/master

• 20:01
  Use .on/.off for event binding, thanks ⓐayumihamsaki - dmethvin Revisions : jquery-mousewheel - GitHub
  Use .on/.off for event binding, thanks ⓐayumihamsaki Closes #201
• 20:00
  "Browsers, Operating Systems, and Devices" does not need to be capita… - EvanHahn Revisions : jquery-mousewheel - GitHub
  "Browsers, Operating Systems, and Devices" does not need to be capitalized

Newest 'libx264' Questions - Stack Overflow http://stackoverflow.com/questions/tagged/libx264

• 17:22
  What is the difference between libx264 and h264_nvenc? - Jonathan Morrall Newest 'libx264' Questions - Stack Overflow
  I am trying to encode some videos but when I use the libx264 they don't work but change the codec to h264_nvenc and they play. If I change the profile to baseline when using the libx264 the videos play. what is the difference? I could use the h264_nvenc but I want to use the libx264 for the better quality for storage. My code bin\\ffmpeg -i "Input-File" -c:v h264_nvenc -bf 3 -b_strategy 2 -temporal-aq 1 -rc-lookahead 20 -profile:v high -preset slow -rc vbr_hq -rc:v vbr_hq -qmin 0 -cq:v 19 -b:v 900k -maxrate:v 5000k -bufsize 2000K -c:a aac -ar 48000 -b:a 128k (...)

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

• 17:41
  Can't invoke FFmpeg.getInstance in Android Java development - BoredDev Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to use FFmpeg in Android Studio but i cant invoke some methods: 1) FFmpeg ffmpeg = FFprobe.getInstance(context); Method getInstance don't "exist" 2) ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() ExecuteBinaryResponseHandler don't exist However i tried to execute ffmpeg.execute and everything works fine. To "install" FFmpeg i did what i found in https://github.com/bravobit/FFmpeg-Android For that i mean: i included dependencies in gradle dependencies implementation 'nl.bravobit:android-ffmpeg:1.1.7' And that's it... Here is the code that FFmpeg works(but (...) -- https://github.com/bravobit/FFmpeg-Android
• 17:36
  Audio async when concatenating two videos - John Smith Newest 'ffmpeg' Questions - Stack Overflow
  I am concatenating two videos (mp4 files) using ffmpeg command. The resulted video file creates issue with audio. The video frames lags in comparison with audio. I have tried using "aresample" and "apad" properties of ffmpeg to tackle the issue but it didn't resolved the issue. Command used for concat 2 mp4 files is as follows :- ffmpeg -y -safe 0 -f concat -i samplefilepath1.txt -c copy concat.mp4 samplefilepath1.txt contains path of both sample videos which needs to be concatenated:- file sample1.mp4 (filepath 1) file sample2.mp4 (filepath 2) The video frames lags in comparison (...) -- https://gofile.io/?c=nXJckX
• 13:48
  Could not find tag for codec h264 in stream #0 (mp4) - TabsNotSpaces Newest 'ffmpeg' Questions - Stack Overflow
  I've been using the sickbeard_mp4_converter for a while to convert video files to mp4 by generating a script for ffmpeg. I'm not sure what I changed, but the ffmpeg script it generates no longer works and I'm having trouble debugging it. Can anyone tell from my log what the issue is? Yes, its supposed to be an mp4 to an mp4, which is typically fine. I'm at the point where I'm using an mp4 that worked with the same autogenerated script yesterday but it no longer is. I remember updating ffmpeg but downgrading did not resolve the issue, though I may have not downgraded enough. ffmpeg 4.1.4 (...) -- sickbeard_mp4_converter
• 13:15
  Java sound vs C sound api in sound result - Ahmed Newest 'ffmpeg' Questions - Stack Overflow
  i finish developing a conference chat app using java, and i used mp3 as encoder and javacv ( ffmpeg ) as a library, but the sound i get not sonorous like Paltalk app i used java sound api to capture the sound then store the sound in a buffer , send it to the encoder and get the compressed bytes and send it via socket then decode it and play it in speaker. the sound format was like 44100 sample rate when i capture the sound in java and in encoder it generate 11025 sound. here how i get sound from java api AudioFormat format = new AudioFormat(44100.0f, 16 , 1, true, false); // target (...)
• 11:59
  How to livestream a webcam to YouTube with FFmpeg? - pkok Newest 'ffmpeg' Questions - Stack Overflow
  I want to send the livestream of my webcam to YouTube. I can follow YouTube's guide up to step 8. "Stream Connection" tells me there is "No data" and the button "Go Live" remains unclickable. A screenshot of this situation can be seen at As encoding software, I was planning on using FFmpeg because it can run from the target platform, a Raspberry Pi with Raspbian. A USB webcam supported by video4linux2 is used. FFmpeg's wiki shows that streaming a file can be done with the following: ffmpeg -re -i input.mkv \\ -c:v libx264 -preset veryfast -maxrate 3000k \\ -bufsize 6000k -pix_fmt (...) -- YouTube\'s guide, FFmpeg\'s wiki
• 10:39
  Effect of AV_CODEC_FLAG2_FAST in decoding H.264 - M.Mahdipour Newest 'ffmpeg' Questions - Stack Overflow
  Does anyone know what is the effect of AV_CODEC_FLAG2_FAST flag in libavcodec library (ffmpeg 4.0.2) when is set on AVCodecContext? AVCodecContext* avCodecContext; AVCodec* avCodec; ... avCodec = ...; avCodecContext = avcodec_alloc_context3(avCodec); avCodecContext->flags2 |= AV_CODEC_FLAG2_FAST; ... // start receiving stream and parsing and decoding frames ... As I have tested on an AXIS camera, I cannot see any difference in decoding performance when this flag is set, compared to not using this flag. Any idea, any information (...)
• 07:36
  ffmpeg hangs when run in background - yoosha Newest 'ffmpeg' Questions - Stack Overflow
  If I run ffmpeg as follows: ffmpeg -i H264-media-4.264 4.avi It works OK (i.e. 4.avi created OK). However, if I try to run it in background: ffmpeg -i H264-media-4.264 4.avi & it hangs! (and 4.avi never created) Any Idea? Note: The problem is an isolation of of similar problem in python when trying to run it as subprocess and there it hanged as well: ff.py includes ps = subprocess.Popen(ffmpeg_list, stderr=subprocess.STDOUT,stdout = subprocess.PIPE) and running ./ff.py runs OK, ./ff.py & hangs too. System: CentOS 6.6 ffmpeg: 0.10.2 Results from successful run: ffmpeg version (...)
• 06:55
  Sending 2 streams to FFmpeg from nodejs - Sylens Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to send 2 ReadableStreams to FFmpeg from nodejs. I have tried using fluent-ffmpeg library to do this, but it only supports sending one stream for processing. Check here My problem is: I have 2 incoming mono audio streams, I want to send them to ffmpeg to create a stereo stream, which I will then send to google's speech to text service, to generate a transcription. I am successfully receiving both the mono streams to the nodejs server. How to utilize FFmpeg to merge them in realtime is still unclear, I could spawn a FFmpeg child process, but I'm not sure how to give 2 (...) -- ReadableStreams, here