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?
• 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 (...)
• 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
• 17:22
  What is the difference between libx264 and h264_nvenc? - Jonathan Morrall Newest 'ffmpeg' 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 (...)
• 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