19 July

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

• 06:55
  What does last line in console output of ffplay mean - Ankur Newest 'ffmpeg' Questions - Stack Overflow
  I am playing a mp4 video using ffplay. While the video is playing the last line of console keeps updating some info ffplay version N-80219-g153ab83 on Windows10 machine. Below is the sample output "22.08 A-V: -0.036 fd= 8 aq= 11KB vq= 19KB sq= 0B f=0/0"
• 03:04
  How to write Video Cutter (native trimmer) [on hold] - Gurbela Newest 'ffmpeg' Questions - Stack Overflow
  I want to write a Video Cutter for React Native. The goal is to choose the time interval from the video and cut it out. For example: 1 minute cut out of 10 minute video. Also I'll be able to rewind the video according to the frames. I think I'll write it on C++ (use ffmpeg) and insert library on Native Project(Android and iOS). I want rewinding and video cutting to be quick. What is the correct way to solve this problem? I want to write it myself and not use any Package. Should I write it separately? for Android - Java and iOS -swift? Which is the good (...)
• 01:10
  ffmpeg NVENC Encoding with -flags:v +ildct shows "No NVENC capable devices found" - gaamaa Newest 'ffmpeg' Questions - Stack Overflow
  So far I use NVENC with ffmpeg for all my encoding successfully. Today I got a new Zotac nVidia GEForce GTX 1660 6GB card. I get "No NVENC capable devices found" error from ffmpeg. Only if I use "-flags:v +ildct" flag. Without "ildct" flag no issues except the output is progressive. I 100% need Interlaced output and I tried most of the Interlaced flags like, "-vf tinterlace=interleave_top,fieldorder=tff" "-x264opts tff=1" Nothing is giving me Interlaced output except "-flags +ildct" But with "Zotac nVidia GEForce GTX 1660" ffmpeg shows "No NVENC capable devices found" error I even (...)
• 00:52
  fluent-ffmpeg converting MKV to MP4 gives error "Conversion Failed" - Jackie Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use fluent-ffmpeg to stream a video from disk, this video is a MKV file. I am trying to transcode this video to MP4 on my NodeJS server and stream it to the client. However, I keep getting the error code 1: Conversion failed! when I try to transcode the MKV file to MP4. Does anyone know why I am getting this error? My code works when I try to transcode a MP4 file to MKV (matroska), but it does not work the other way around. Here is the code I am using: app.get('/video123', function (req, res) var path = 'assets/sample2.mkv'; ffmpeg(path) .format('mp4') .on('end', (...)
• 00:38
  FFMPEG cuts off audio at end of clips - nwood21 Newest 'ffmpeg' Questions - Stack Overflow
  Below is a command I input. It cuts the audio off from an mp3 file at the end of the file it creates. Strangely, the file is 25 minutes long cut from a much longer mp3 file, so the physical length is correct but the audio cut off from the mp3 is not. Same command with a .wav file does not cut off audio at the end. FFMPEG is having problems with the mp3 file. FFMPEG is also giving me this error: [mp3 ⓐ 0x7fd73b80d000] Estimating duration from bitrate, this may be inaccurate. So I think it's estimating the length of the mp3 file incorrectly, but this same error message does not appear for (...)

18 July

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

• 20:15
  Error during the compilation of OpenCV with CUDA and FFMpeg on Ubuntu 18.04 - Karthik Newest 'ffmpeg' Questions - Stack Overflow
  I have a requirement to install OpenCV compiled with CUDA and FFMpeg for an optical flow calculation. I followed this post to install on Ubuntu 18.04, but I am getting the following error shown in the below screenshot when I am trying to execute the following command: cmake -D CMAKE_BUILD_TYPE=RELEASE \\ -D CMAKE_INSTALL_PREFIX=/usr/local \\ -D INSTALL_C_EXAMPLES=ON \\ -D INSTALL_PYTHON_EXAMPLES=ON \\ -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib/modules \\ -D BUILD_EXAMPLES=ON \\ -D BUILD_opencv_python2=OFF \\ -D WITH_FFMPEG=1 \\ -D WITH_CUDA=ON \\ -D CUDA_GENERATION=Pascal \\ -D (...) -- this post,
• 17:46
  Encoding video live? (Showing frame which i will overlay on camera while recording video) - Marko Miljkovic Newest 'ffmpeg' Questions - Stack Overflow
  I'm not sure I can really explain this the best way I can, but I'll try my best. I want to create custom camera activity, which will capture video from camera, and show some image over that video, and actually encode that image in video. I`m pretty sure I need to use ffmpeg, but, I want to know, is there a way that I can record a video and an image together, and encode it realtime, or do I need to go around, make camera activity, put image over video, as another view, get its coordinates, and then encode it in video using this command: ffmpeg -i movie.mp4 -i logo.png -filter_complex (...)
• 17:00
  How do VLC and ffmpeg work together? - Toufik Moad Newest 'ffmpeg' Questions - Stack Overflow
  I compiled VLC from the source code and it works well. When I do ". / Vlc" vlc runs. I also compiled ffmpeg from source and it works well too. When I do "ffmpeg-i-f toto.flv mp3-vn-acodec copy new_toto.mp3", the file named "new_toto.mp3" is generated. What I cannot understand is how VLC and ffmpeg work together? What part of VLC code uses ffmpeg code? Is there a ffmpeg command to play (read) a video?
• 16:35
  FFMPEG "listfile.txt: Invalid data found when processing input" concat error - Léandre Newest 'ffmpeg' Questions - Stack Overflow
  I have a txt file, where I have all my mp4 file to concat with ffmpeg. I saw the documentation of FFMPEG but I don't see where I did something wrong. Here is my txt file : file '/home/leandre/PycharmProjects/video_test/1.mp4' file '/home/leandre/PycharmProjects/video_test/2.mp4' file '/home/leandre/PycharmProjects/video_test/3.mp4' file '/home/leandre/PycharmProjects/video_test/4.mp4' file '/home/leandre/PycharmProjects/video_test/5.mp4' file '/home/leandre/PycharmProjects/video_test/6.mp4' file '/home/leandre/PycharmProjects/video_test/7.mp4' file (...) -- documentation of FFMPEG
• 15:09
  FFMPEG -f segment and FFPROBE keyframes are different - user2190197 Newest 'ffmpeg' Questions - Stack Overflow
  I have a online video editor. And i want fast strip and concat mp4 files. For this i use code like this: For get keyframes: exe_ffprobe("-select_streams v -skip_frame nokey -show_frames -show_entries frame=pkt_pts_time,pict_type $input_file"); Sample Result: array ( 0 => '0.083417', 1 => '2.085419', 2 => '4.170838', ... 12 => '24.149149', 13 => '26.234568', 14 => '27.569236', '29.654655', ... 230 => '466.966967', 231 => '469.052386', 232 => '471.137804', 233 => '473.223223', 234 => '475.308642', 235 => '477.394061', 236 => '479.479479', ) ... For split video: exe_ffmpeg("-y -i (...)
• 14:50
  What does last line console output of ffplay mean - Ankur Newest 'ffmpeg' Questions - Stack Overflow
  I am playing a mp4 video using ffplay. While the video is playing the last line of console keeps updating some info ffplay version N-80219-g153ab83 on Windows10 machine. Below is the sample output "22.08 A-V: -0.036 fd= 8 aq= 11KB vq= 19KB sq= 0B f=0/0"
• 13:41
  How to dynamically change ffmpeg output resolution when transcoding mkv file with variable frame size? - Márton György Newest 'ffmpeg' Questions - Stack Overflow
  I have an MKV file where the first frame is 320x180 and from the second frame on everything is 1366x768. How to handle this with ffmpeg to automatically recognize the largest frame and set output resolution accordingly? I have many MKV files with different resolutions so setting it beforehand is not an option.
• 12:27
  Save RTSP stream continuously into multi mp4 files with specific length (10 minutes) in ffmpeg - thanhphan Newest 'ffmpeg' Questions - Stack Overflow
  I'm recording RTSP stream from camera into .mp4 files using ffmpeg and I want to roll it into multi files with 10 minutes long every videos. Currently I have a solution for this: I'm setting a time length '00:10:00', after it finished then I will restart below command with new process. Sample: ffmpeg -rtsp_transport tcp -i -acodec copy -vcodec copy -t 00:10:00 D:\\video_test.mp4 But this solution makes camera becoming unstable, RTSP stream uasually corrupted with this error: rtsp://10.96.41.14:9024/user=xxxx_password=xxx_channel=1_stream=0.sdp?real_stream: Operation not permitted I want (...)
• 11:06
  FFMPEG: Using Zoompan drawtext jiggle issue - axita.savani Newest 'ffmpeg' Questions - Stack Overflow
  I have applied the Zoompan effect (only Zoom Out) and Fad In and Fad Out effect to drawtext using FFmpeg but its output is text is Zoom out with jiggle (shaking right and left). How i solve this issue? Here is Command: ffmpeg -i D:/video/square_630_630_42.mp4 -filter_complex "color=black:320x320,split[text][alpha];[text][alpha]alphamerge,setsar=1,drawtext=textfile="D\\\\:/video/temp.txt":fontsize=20:fontfile=Consolas.ttf:fontcolor=ff00ff:box=1:boxborderw=1:boxcolor=00000000:shadowcolor=000000:shadowx=1:shadowy=1.5:alpha='if(lt(t,4),0,if(lt(t,7),(t-4)/1,if(lte(t,(10-3)),1,if(lt(t,10),(10-t)/1,0))
• 10:18
  How to hide text after specific location in scroll - kiara Newest 'ffmpeg' Questions - Stack Overflow
  I have ffmpeg code which have a image overlay on top of tht. I am adding a scrolling text. Now I want this text to rotate till a specific position like breaking news on channel but I am not able to figure out the command. Can anybody help? This is what I am trying ffmpeg -i video.mp4 -i image.png -filter_complex "[0:v]overlay=25:25,drawtext=text='abcddgfs fgshrhtr':fontfile=/usr/share/fonts/truetype/ubuntu/Ubuntu-B.ttf:y=h-line_h-110:x=w-mod(max(t-2.5\\,0)*(w+tw-25)/7.5\\,(w+tw-250)):fontcolor=red:fontsize=40:shadowx=2:shadowy=2" -t 15 -y (...)
• 09:15
  How to read remote video on Amazon S3 using ffmpeg - virtualize Newest 'ffmpeg' Questions - Stack Overflow
  I need to create poster frames from videos hosted on Amazon S3 via ffmpeg. So is there a way to use the remote video file directly in ffmpeg command line like this: ffmpeg -i "http://bucket.s3.amazonaws.com/video.mp4" -ss 00:00:10 -vframes 1 -f image2 "image%03d.jpg" ffmpeg just returns: http://bucket.s3.amazonaws.com/video.mp4: I/O error occurred Usually that means that input file is truncated and/or corrupted. I also tried forcing ffmpeg to use the videos mp4 container for reading: ffmpeg -f mp4 -i "http://bucket.s3.amazonaws.com/video.mp4" ... But no luck. Wget this video from S3 (...)
• 08:19
  Build ffmpeg on a build machine - RDI Newest 'ffmpeg' Questions - Stack Overflow
  Build ffmpeg on build PC using libx264 and shared libraries (not static). I am building on a Red Hat 6.6 Server and final target machine is CentOS 6.6. I am trying, as said, to build ffmpeg with encoding enabled (with libx264) and shared libraries; of course I do not want to install the libraries on the build PC, they should be only extracted and then delivered together with the final RPM. After the "./configure" I get all RPMs (related to ffmpeg) but when trying to installing ffmpeg-libs on the build pc it fails because the libx264.so.157 is not found, even if as test I installed it (...)
• 04:58
  How to solve issue with ffmpeg being stuck at 'Opening an input file' - zmd989 Newest 'ffmpeg' Questions - Stack Overflow
  I am using a capture card to capture HDMI audio from another machine. On my host, output of arecord -l is as follow: **** List of CAPTURE Hardware Devices **** Home directory not accessible: Permission denied card 0: PCH [HDA Intel PCH], device 0: ALC283 Analog [ALC283 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 1: capture [ezcap U3 capture], device 0: USB Audio [USB Audio] Subdevices: 1/1 Subdevice #0: subdevice #0 The command that I use is: sudo ffmpeg -f alsa -i hw:CARD=capture,DEV=0 -t 30 test.wav -loglevel debug When I ran the command, the log seems to freeze at (...)
• 04:06
  ffmpeg reduce memory consumption - Ehsan Vahab Newest 'ffmpeg' Questions - Stack Overflow
  I'm developing an application, capturing some ip camera with RTSP protocols and send them to one server. everything is going well when the resolution of ip cameras is low but when they're increased the memory consumption of my program goes up suddenly. I've realized that ffmpeg stores a sequence of frames which we can seek to. 1.is there any way to reduce the len of that? 2.is it possible to reduce the frame size when the ffmpeg reads the frames from the input(=>ip camera)? the size 400x400 is enough for my app but currently it's 2048 3.or any other way to help me reduce memory (...)