26 May

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

• 07:23
  FFMPEG My stitched frames colors looks very different from my original video, causing my video to not be able to stitch it back properly - Wer Wer Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to extract some frames off my video to do some form of steganography. I accidentally used a 120fps video, causing the files to be too big when i extract every single frame. To fix this, I decided to calculate how many frames is needed to hide the bits (LSB replacement for every 8 bit) and then extract only certain amount of frames. This means if i only need 1 frame, ill extract frame0.png ill remove frame0 from the original video encode my data into frame0.png stitch frame0 back into ffv1 video concatenate frame0 video to the rest of the video, frame0 (...) -- Frame0.mkv, original.mkv, results.mkv
• 05:48
  How to check 'Output bit depth' of the libx264 library in ffmpeg? - Greg Newest 'ffmpeg' Questions - Stack Overflow
  According to the x264 Encoding Guide, the crf scale depends on whether x264 is 8-bit or 10-bit. Supposedly x264 --help shows the Output bit depth. But on Windows ffmpeg -h full doesn't say anything about Output bit depth and the crf scale option is described as from -1 to FLT_MAX. How can I check if my ffmpeg is using 8-bit or 10-bit version of the libx264 library? -- x264 Encoding Guide
• 01:36
  FFMPEG img%d.png with Subdirectory - Xitano Newest 'ffmpeg' Questions - Stack Overflow
  How to use with subdirectory? Command: ffmpeg -framerate 1/X -i subdirectory/img%d.png -r 25 -pix_fmt yuv420p out.mp4 Result: Error opening input file subdirectory/img%d.png. It works in the same directory as the command, but when I try to use a subdirectory, it doesn't work.

25 May

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

• 01:10
  ffmpeg combine filters for audio and video [closed] - Wise Newest 'ffmpeg' Questions - Stack Overflow
  I am trying to use hue=s=0 alongside replacing audio using ffmpeg. I have this originally: /usr/bin/ffmpeg -y -i 'source.mp4' -filter_complex "amovie='audio.mp3':loop=0,asetpts=N/SR/TB[aud]" -map 0:v -map '[aud]' -c:v copy -c:a aac -b:a 128k -shortest 'out.mp4' This works great. Audio is replaced. Now I want to turn it black and white so I try to add hue=s=0: /usr/bin/ffmpeg -y -i 'source.mp4' -filter_complex "hue=s=0,amovie='audio.mp3':loop=0,asetpts=N/SR/TB[aud]" -map 0:v -map '[aud]' -c:v copy -c:a (...)
• 01:04
  Use ffmpeg to match an image to source frames in video [closed] - user22335954 Newest 'ffmpeg' Questions - Stack Overflow
  I'm trying to write an application to split a single video into multiple pieces based on the appearance of a specific image. (Think title cards). I have video files that may have more than one episode or content inside of a single file and I want them split anywhere I find that title card or image. My application works by the user providing a timestamp in the format of 00:00:00 to specify the title card image which is then used like this: ffmpeg -i FILE -qmin 1 -qscale:v 1 -vframes 00:00:00 -f image2 img.png Now I want to compare that image (img.png) to the source (...) -- https://ffmpeg.org/ffmpeg-filters.html#Examples-46
• 11:07
  How can I use physical computer's GPU on VMware Workstation? - ching Newest 'ffmpeg' Questions - Stack Overflow
  I am ching. I want to use GPU to accelerate video transcoding time by using ffmpeg on the virtual machine, VMware Workstation. I use command lspci | grep VGA, the output is 00:0f.0 VGA compatible controller: VMware SVGA II Adapter It seems that I only can use its own Graphic Card on VMware, right? How can I use my physical computer's GPU, NVIDIA Quadro K2000? Or another solution can solve the problem mentioned on the (...)
• 11:06
  Compress video using ffmpeg.js - John Mark Newest 'ffmpeg' Questions - Stack Overflow
  I attempted to upload and compress a video using ffmpeg.js. However, it appears that this process is ineffective on modern browsers. I have already implemented console logging to verify if the video compression is occurring, yet thus far, no compression has been achieved. Could anyone suggest an alternative library for video compression that might better suit the requirements? import FFmpeg from 'ⓐffmpeg/ffmpeg'; export default methods: async handleFileInputChange(event) const file = (...)
• 07:09
  FFmpeg Error: Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_amix_54 - Josh Lawson Newest 'ffmpeg' Questions - Stack Overflow
  I'm working on a project to generate a click track using React.js and FFmpeg. The project includes an Express.js backend where I construct an FFmpeg command to combine multiple audio files (count-ins, vocal cues, and click sounds) into a single track. The final output should be an MP3 file. However, I'm encountering an error when running the FFmpeg command: Cannot find a matching stream for unlabeled input pad 0 on filter Parsed_amix_54 How can I correctly construct the FFmpeg command to avoid the "Cannot find a matching stream for unlabeled input pad" error (...)

24 May

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

• 13:45
  I use ffmpeg to encode and create MPEG file from a source MP4 file. In Mac the encoding is good but in windows it creates random green pixels [closed] - Amudhan R Newest 'ffmpeg' Questions - Stack Overflow
  I use ffmpeg 3.4.2 version to encode and create an MPEG-TS file using H.264 encoding. In both Windows and Mac the ffmpeg creates the video without any error. But the resultant video from windows having a green pixels on certain frames. No idea why this is happening. Below is the encoding command: ffmpeg -i VIDEO_SOURCE.mp4 -vf scale=720:480 -c:v libx264 -b:v 2M -minrate 2M -maxrate 2M -bufsize 2M -level:v 40 -profile:v main -bf:v 2 -r 30 -crf 22 -x264-params 'keyint=3:min-keyint=3:ref=2:8x8dct=0:weightp=1:subme=6:rc-lookahead=30' -c:a aac -b:a 130k -ar 48000 -f mpegts (...)
• 18:28
  How to use ffmpeg to convert a flac file to alac and preserving all metadatas? - AxZxP Newest 'ffmpeg' Questions - Stack Overflow
  I use this loop to convert flac to alac : for i in *.flac; do ffmpeg -i "$i" -y -vn -c:a alac "$i%.flac".m4a; done But some tags are not exported. I tried to use the -map_metadata 0 -id3v2_version 2 flag but it does not change anything. Here you can find the tags that are copied (with or without the -map_metadata) : original tags tags copied When I use XLD Mac software it works perfectly but for some reasons I'd like to use CLI to convert flac (...) -- original tags, tags copied
• 15:33
  How to achieve real time video editing on Android? - Itamar Newest 'ffmpeg' Questions - Stack Overflow
  I've been working recently on a video-editing-related project on Android, and am desperately looking for resources related to video editing on the platform. The only video-editing related "method" or information I could find was using the FFmpeg library, which is pretty rich in features and capabilities but works really slow, operations such as reversing a 10-second video can take as long as 30 seconds, which delivers a really poor user experience. That being said, it seems that there are tons of Android video-editing apps that are capable of doing everything FFmpeg can, (...) -- InShot, PocketVideo, previous musical.ly TikTok
• 14:41
  How to convert .fbx to frame images - Ittefaq Technologies Newest 'ffmpeg' Questions - Stack Overflow
  I wanna to need help that i wanna to convert .fbx to video through script and i found a soluotion to do it through FFmpeg but it not supports .fbx so i need help in to get frame images so i can make video through ffmpeg or if i am goin in wrong direction you can help me I tried to convert a .fbx file to .obj using three.js and then create a video from the .obj file, but it didn't work. // Function to load FBX using FBXLoader function loadFBX(blob, loader, callback) var url = URL.createObjectURL(blob); loader.load(url, function(object)  (...)
• 14:08
  avcodec_find_encoder(AV_CODEC_ID_H264) returns null - Monjura Rumi Newest 'ffmpeg' Questions - Stack Overflow
  I am building an android application which will encode image captured from camera preview and later decode it. I am using ffmpeg library to encode and decode. To build static library with x264 I have used this tutorial. http://dl.dropbox.com/u/22605641/ffmpeg_android/main.html. As a source code of ffmpeg if I use the one downloaded from the link given in tutorial I can built it but can't build library if i use source code downloaded from here git clone git://source.ffmpeg.org/ffmpeg.git ffmpeg. I have built library in ubuntu and using it in windows 7 in Eclipse. As I need only h264 (...)