Recent questions tagged ffmpeg

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I can create a mpg video using this line ffmpeg -f image2 -i 100%03d0.png movie.mpg But If I try creating an ... .png,1000020.png,...1001260.png See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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919 views

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ffmpeg - Making jumping text watermark

I want to make something like these : http://www.youtube.com/watch?v=AtM-f20XV4E you can see there a watermark which ... using ld() and st() ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ffmpeg - How to load correct libavcodec.so shared library version? (53)

I am using libavcodec and libavformat in my project but when I execute a binary which was built on another machine, I ... output. (OS = 12.04) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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660 views

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ffmpeg executed from Java's processbuilder does not return under windows 7

I was trying to build up a ProcessBuilder calling the ffmpeg binary. My problem is that calling it, it returns ... Result is the same. :( See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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ffmpeg - Save a RTSP stream to mp4 file in android

I am working on a project where I need to read input stream from an IPCamera. I am able to fetch this in ... ); } mediaRecorder.start(); Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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977 views

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ffmpeg - Dynamic letters and random position watermark to video?

I am making an online course, and to avoid piracy distribution I thought to put watermarks on the videos ( ... It is possibile with ffmpeg? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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952 views

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ffmpeg - Drawing dynamic text on video stream

I'm trying to change text dynamically every 5 minutes on my live video stream This is the argument im using: - ... to use this options? Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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ffmpeg concat videos with different timebase

I use ffmpeg.exe -f concat -i file_path_list_txt -c copy out_out.mp4 to concat for file in 1265_*; do ffmpeg -i ... I comress it and append it. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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ffmpeg - How to determine webm duration using ffprobe

My goal is simple , I have several webm files need to be concated, but first I need to determine their durations ... title : Audio duration=N/A See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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752 views

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ffmpeg - How do I render a video from a list of time-stamped images?

I have a directory full of images following the pattern <timestamp>.png, where <timestamp> represents ... using a constant framerate? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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929 views

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ffmpeg - Wav audio file compression not working

Is it possible to compress a wav audio file without reducing the sampling rate? I have an audio file with 256 ... .wav has default 256 bit rate See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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ffmpeg - Can I create a VFR video from timestamped images?

First, I have almost zero experience in making videos from images. What I have is a set of BMP timestamped images ... to achieve what I want? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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900 views

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ffmpeg av_read_frame() need very long time to stop

I use ffmpeg to decode RTSP video.It likes that: When it's on the end of file,it block in the av_read_frame() for a long time,why? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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944 views

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ffmpeg - Detect if "faststart" has been applied to video

When running "qt-faststart" on an MP4, you're essentially taking the meta data from the back and placing it at ... -faststart run on it or not. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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854 views

1 answer

ffmpeg - How to use libavformat to concat 2 video files with same codec (re-muxing)?

I have downloaded videos from CDN in flv format (video H264 and audio AAC) and remux to them to MP4 format. But ... shift in dts i made before. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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887 views

1 answer

ffmpeg - Low Latency DASH Nginx RTMP

I use arut nginx-rtmp-module (https://github.com/arut/nginx-rtmp-module) on the media server, then I tried ... before, sometimes it's the same See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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975 views

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ffmpeg - Low Latency DASH Nginx RTMP

I use arut nginx-rtmp-module (https://github.com/arut/nginx-rtmp-module) on the media server, then I tried ... before, sometimes it's the same See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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712 views

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ffmpeg - Create time lapse video from other video

Using avconv (or even ffmpeg, so I can use as a reference), how can I create a time lapse video by taking ... ) to produce a 2 second video. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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598 views

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ffmpeg - How to play and seek fragmented MP4 audio using MSE SourceBuffer?

I am trying for quite some time now to be able to play an audio track on Chrome, Firefox, Safari, etc. ... seconds after, the audio simply stops.. See Question&Answers more detail:...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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459 views

1 answer

ffmpeg - Setting/Installing up OpenCV 2.4.6.1+ on Ubuntu 12.04.02

I had previously used OpenCV 2.4.5 with some certain configs and packages on Ubuntu 12.04.1 but had issues upgrading to OpenCV 2. ... Image", image ); waitKey(0); return 0; } # To...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

1 answer

ffmpeg - Generate all the files (.vtt + sprite) for the Tooltip Thumbnails options of Jwplayer

What is the best way to generate the ".VTT" file and the jpg sprite attached with it for the Tooltip Thumbnails ... but i cant find it. Thanks See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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690 views

1 answer

ffmpeg - Video encoding libraries for iOS

I really stucked with that problem, because I haven't seen enough information in the internet regarding video ... 'm open for dicsussion. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.0k views

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ffmpeg - Convert compressed swf to mp4

I'm looking for a batch script to convert swf to mp4, lossless. I tried using both ffmpeg and handbrake, ... can help me automate this process? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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710 views

1 answer

ffmpeg - Understanding PTS and DTS in video frames

I had fps issues when transcoding from avi to mp4(x264). Eventually the problem was in PTS and DTS values, so ... ! Shouldn't it be positive? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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623 views

1 answer

ffmpeg convert mov file to mp4 for HTML5 video tag IE9

I looked everywhere here and on google - there is no valid command that works for IE9. some how IE9 is ... would be much appreciated. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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790 views

1 answer

ffmpeg - ffmepg video from uneven sequence of png images

I'm going to make a video from series of screenshots (.png files). For each screenshot there is assosiated timestamp ... to me a bit fragile. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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858 views

1 answer

ffmpeg - convert image sequence to video with reversed order

Looking at the docs, it is not apparent to me whether ffmpeg would allow me to convert an image sequence ... direction" for the frame indices? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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714 views

1 answer

ffmpeg - Extend + scale a portrait video so the aspect ratio stays and the black borders become a blurry version of the video

I have a 720 x 1280 pixels video. How do I extend and scale it to 1920 x 1080 such that the aspect ... 656:y=0:color=black" video1920x1080.mp4 See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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