Search results
Results from the WOW.Com Content Network
Extract a specific audio track / stream. Example to extract audio stream #4: ffmpeg -i input.mkv -map 0:a:3 -c copy output.m4a -map 0:a:3 selects audio stream #4 only (ffmpeg starts counting from 0).-c copy enables stream copy mode. This copies the audio and does not re-encode it. Remove -c copy if you want the audio to be re-encoded.
ffmpeg -i filename.mp4 filename.mp3 or. ffmpeg -i video.mp4 -b:a 192K -vn music.mp3 Check this URL: MP4 Video to MP3 File Using ffmpeg (Ubuntu 9.10 Karmic Koala) link broken [Updated on 7th Dec 2021] Note: Ubuntu does not supply FFmpeg, but the fork named Libav. The syntax is the same – just use avconv instead of ffmpeg for the above examples.
ffmpeg -i video.mp4 -acodec copy -ss 00:30:00 -to 00:60:00 extract.mp3 but it fails and says [mp3 @ 0x3bfade0] Invalid audio stream. Exactly one MP3 audio stream is required. Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Assuming that the original audio is compressed, you can keep the same quality without the large file size needed for uncompressed audio by just copying the original audio (without the video) to a new mp4 file: ffmpeg -i my_video.mp4 -c copy -map 0:a output_audio.mp4
ffmpeg -i VIDEO.mkv -vn -acodec copy AUDIO.aac. It just extract 1 audio. What I want is tell ffmpeg to extract every single audio files and subtitle files to a destination, and keep the original name of each files and extensions. (Because I don't know which extension does the audio files are, sometimes maybe .flac or .aac).
I have 228 mp4 files (2.6GB) and would like to extract audio from them (mp3 or ogg). I want to batch extract them - preferably with bash. I'm not sure if all files use the same audio codec as they were recorded in different years, ranging from 2006-2012.
To demux/extract aac from mp4 (assuming audio is the 2nd track): mp4box -raw 2 video.mp4 This will automatically create output file "video_track2.aac" (Use mp4box -info video.mp4 to get a list of the tracks in the MP4 file.) If you wanted control over the output filename, you would do. mp4box -raw 2 video.mp4 -out audio.aac
ffmpeg -i input.mp4 -vn -acodec pcm_s16le -ac 2 -ar 44100 out.wav -vn: no video-acodec: audio codec selection. pcm_sl6le: 2 bytes samples in little endian format-ac: number of audio channels-ar: audio sample rate. out.wav output wav file
Came across this question, so here's a quick comparison. Compare these two different ways to extract one frame per minute from a video 38m07s long: time ffmpeg -i input.mp4 -filter:v fps=fps=1/60 ffmpeg_%0d.bmp 1m36.029s. This takes long because ffmpeg parses the entire video file to get the desired frames.
Lets say for example that your video file my_video.mp4 is composed this way: Input #0 Stream #0:0 Video: h264 Stream #0:1 Audio: English Stream #0:2 Audio: German Stream #0:3 Audio: Japanese Stream #0:4 Audio: Spanish Stream #0:5 Audio: Italian To remove all audio tracks (like the -an option does):