NOTE: This solution adds the subtitles to the video as a separate optional (and user-controlled) subtitle track. ffmpeg -i infile.mp4 -i infile.srt -c copy -c:s mov_text outfile.mp4 -vf subtitles=infile.srt will not work with -c copy The order of -c copy -c:s mov_text is important. You are telling FFmpeg: Video: copy, Audio: copy, Subtitle: copy Subtitle: … Read more
Use ffprobe Example command $ ffprobe -v error -select_streams v:0 -show_entries stream=codec_name -of default=nokey=1:noprint_wrappers=1 input.mp4 Result h264 Option descriptions -v error Omit extra information except for fatal errors. -select_streams v:0 Select only the first video stream. Otherwise the codec_name for all other streams in the file, such as audio, will be shown as well. -show_entries … Read more
anullsrc audio filter You can use ffmpeg to create the silent audio and combine it with a video in one step. This example will use the anullsrc audio filter to generate stereo silent audio with a sample rate of 44100: ffmpeg -f lavfi -i anullsrc=channel_layout=stereo:sample_rate=44100 -i video.mov -c:v copy -c:a aac -shortest output.mov channel_layout=stereo:sample_rate=44100 is … Read more
You can use libswscale from FFmpeg like this: #include <libswscale/swscale.h> SwsContext * ctx = sws_getContext(imgWidth, imgHeight, AV_PIX_FMT_RGB24, imgWidth, imgHeight, AV_PIX_FMT_YUV420P, 0, 0, 0, 0); uint8_t * inData[1] = { rgb24Data }; // RGB24 have one plane int inLinesize[1] = { 3*imgWidth }; // RGB stride sws_scale(ctx, inData, inLinesize, 0, imgHeight, dst_picture.data, dst_picture.linesize); Note that you … Read more
First you need to create a SwsContext (you need to do this only once) : struct SwsContext *resize; resize = sws_getContext(width1, height1, AV_PIX_FMT_YUV420P, width2, height2, PIX_FMT_RGB24, SWS_BICUBIC, NULL, NULL, NULL); You need two frames for conversion, frame1 is the original frame, you need to explicitly allocate frame2 : AVFrame* frame1 = avcodec_alloc_frame(); // this is … Read more
Use the mpdecimate filter, whose purpose is to “Drop frames that do not differ greatly from the previous frame in order to reduce frame rate.” This will generate a console readout showing which frames the filter thinks are duplicates. ffmpeg -i input.mp4 -vf mpdecimate -loglevel debug -f null – To generate a video with the … Read more
With re-encoding: ffmpeg -y -i seeing_noaudio.mp4 -vf “setpts=1.25*PTS” -r 24 seeing.mp4 Without re-encoding: First step – extract video to raw bitstream ffmpeg -y -i seeing_noaudio.mp4 -c copy -f h264 seeing_noaudio.h264 Remux with new framerate ffmpeg -y -r 24 -i seeing_noaudio.h264 -c copy seeing.mp4
For recent versions of Debian/Ubuntu (Debian 9+ or Ubuntu 16.04+) install the php-dev dependency package, which will automatically install the correct version of php{x}-dev for your distribution: sudo apt install php-dev Older versions of Debian/Ubuntu: For PHP 5, it’s in the php5-dev package. sudo apt-get install php5-dev For PHP 7.x (from rahilwazir comment): sudo apt-get … Read more
I’ve been playing around with this for a few days. That “ffmpegprogress” thing helped, but it was very hard to get to work with my set up, and hard to read the code. In order to show the progress of ffmpeg you need to do the following: run the ffmpeg command from php without it … Read more
To extract the audio stream without re-encoding: ffmpeg -i input-video.avi -vn -acodec copy output-audio.aac -vn is no video. -acodec copy says use the same audio stream that’s already in there. Read the output to see what codec it is, to set the right filename extension.