Ffmpeg remove audio. 2: cut out the first 0.

Ffmpeg remove audio mp4 -an -c copy no_sound. wav file. As pointed out by @mems, to detect whether your version of ffmpeg has the filter run Aug 4, 2020 · However, both of these solutions require "streaming" all the video/audio tracks to another file, and just skip adding the subtitle streams. Dec 18, 2020 · I would like to cut the silent parts (where my prof writes on the blackboard but does not talk) off from my lecture notes. Please explain the syntax/cmd offered\suggested. mkv containing the video stream and the English audio stream (see proof below) $ ffmpeg -v quiet -i 'my_input Apr 1, 2022 · I'm trying to remove a cover from a file while encoding. But in addition to that, you may use it to remove audio from your videos or clips. For some reason the width value can't be higher than 999 Hz Jul 26, 2019 · using FFMPEG with silencedetect to remove audio silence. This might just be because ffmpeg can be buggy sometimes. ac3 -map 0:v -map 1:a -c copy output. -map -0:a:2 then deselects audio stream 3. -vcodec copy specifies that ffmpeg should do a straight copy the existing video track (and not do any processing/encoding of it). I am a novice coder using Terminal on MAC that has installed FFMPEG and attempting to edit an entire directory. First, the -i flag specifies the input video file name. aac Re-mux the audio and video. FFmpegは、動画や音声ファイルを編集・変換するための無料ソフトです。形式変換（MP4→AVIなど）、音声削除、トリミング、圧縮などが可能で、ほぼすべてのフォーマットに対応します。 Nov 20, 2018 · This should give me a 480p video with stereo sound,which I require. The -c copy option tells it to copy the video without re-encoding. Here are two different ways to delete audio May 16, 2022 · To remove streams by language using FFmpeg, you first need to gather file data using an application such as FFprobe or MediaInfo. The Specific Solution May 5, 2022 · For example, to remove the second video stream you'd use -map -0:v:1, to remove the second audio stream you'd use -map -0:a:1 and to remove the second subtitle stream you'd use -map -0:s:1. wav -y This command attenuates everything between 900 - 600 = 300 Hz and 900 + 600 = 1500 Hz. 0 ffmpeg -ss 2 -vcodec copy -acodec copy -i input. Capture a snapshot of a specific scene and save it in JPG, PNG, or WEBP formats. mkv Delete intermediate files. mp4" : FFmpeg is the leading multimedia framework, able to decode, encode, transcode, mux, demux, stream, filter and play pretty much anything that humans and machines have created. If you don't specify it, then it will still work but ffmpeg may re-encode the find -name '*. 0 -to 60. Remove -c copy if you want the audio to be re-encoded. Is it possible to combine both of the parameters to get N-th sample with one FFmpeg invocation (let's say 123456789)? I've tried ffmpeg -i input. mp4 -map 0:0 -map 0:2 -acodec copy -vcodec copy new_file. 99% of the time this should work. Mar 6, 2016 · Directly with ffmpeg is currently possible. Apr 30, 2014 · -map -0:4 removes the 4rd track from input 0, which is the Spanish audio. wav -af anlmdn=s=10 output. mp4 -c:v copy copies the video stream. They are originally about 1 to 2 minutes long each, and should stay that way. mp4 from this question but neither work. Complete. aax -c copy <Output>. -an option disables audio recording. mp4) in Adobe Premiere and looked at the audio waveforms, I realized the the video had a 32ms audio delay compared to the original audio. com Remove a specific audio stream / track ffmpeg -i input -map 0 -map -0:a:2 -c copy output -map 0 selects all streams from the input. If your audiobook player doesn't understand that format, you can just rename it to m4a (doesn't require transcoding) or convert it to mp3, etc. Specifically: 1) File's Basic info based on ffprobe show_streams Feb 15, 2022 · I am using FFMPEG to apply several audio codecs to a large number of speech files. Below is the quickest way to remove audio from any form of video using the -an option: $ ffmpeg -i input. wav -af atrim=start_sample=123456788 -af atrim=end_sample=123456789 output. But each time I run: ffmpeg -i test. By default ffmpeg only encodes the first audio and video track, so that is why you need the first "-map 0" to include all tracks. ) I try remove all metadata to output a . mp3. ac3) and my final video (output. but the title is still "how to remove audio from video". mp4 by all audio tracks in the audio file a. mp3 example: remove the attached picture tag APIC. For example I want to remove from 30s to 45s and have the rest with me. Ask Question Asked 6 years, 8 months ago. mp3 from this Jul 11, 2019 · I have an . In this section, we will teach you how to disable or remove the audio from your video effectively using FFmpeg. Dec 31, 2024 · FFmpegを使う. I'm trying to remove it. 02: This part cut the end silence out. ' May 1, 2020 · I was trying to remove audio from video using FFmpeg, the command I used is: ffmpeg -i video. mp4. mp4 -vn -acodec copy audio. mp4 files, while also preserving the original file. ffmpeg -i input. -an removes the audio stream. Removing an audio track requires an additional command to finish and achieve the desired output. No dice. I show you how to do it, May 2, 2017 · I'm trying to remove a section from an audio. mp4 -c:v copy -an out. m4a -c copy -map 0 -map -0:a -map 1:a video-new. or even shorter way (if you do not care about the order of the streams in the output, audio will be the last stream): Oct 17, 2022 · When I add new audio by using amix filter, it keeps all sound like English and new language both, and both plays together. I've tried looking around in VLC, but I can't see how this is done. this is what I'm trying to do: ffmpeg -i 2009. mp3 -filter_complex "[0]atrim= You can use negative maping (with your number of audio streams to remove "if they exist", my example has 3): ffmpeg -i input -map_metadata 0 -map 0 -map -0:a:1? -map -0:a:2? -map -0:a:3? -c copy output. ffmpeg -y -i v. silenceremove=start_periods=1:start_silence=0. Feb 11, 2014 · Is there a way by which i can remove the human voice from a audio/video. For example: ffmpeg -i input. If you wanted to keep 2 & 3 but not 4, you could use --audio-tracks 2,3. May 12, 2018 · How to remove audio from video without re-encoding Jun 29, 2020 · In this video I extract the audio track from a video file using FFmpeg. See a simple CLI example with the -vcodec copy and -an options. , muting the video, run the following command: ffmpeg -i input. mkv -map 0:a:3 -c copy output. mp4 Jan 22, 2021 · Based on a ffmpeg users IRC conversation, looks like silenceremover doesn't keep the presentation timestamps after doing its thing, probably because it was thought to be used only for audio, so the muxer afterwards has no way to know that some frames should be dropped. Is it possible to simply remove the subtitle track(s) from a movie file without having to stream anything? Streaming video/audio tracks require significant resources, time, and is basically a remux. Can anyone suggest how to get both the video and audio into the output? Example: I have a 2min video shot on holiday, of a kangaroo. ffmpeg -i song. It's a prolific tool used to remove, add, extract, and add the audio in video files. 4 Main options . wav. m4b Note: "m4b" is a format for audiobooks that supports things like bookmarks (for resuming where you left off, etc. m4a, keeping all other tracks including video tracks and subtitle tracks intact. flv output. wav That will use the anlmdn denoising filter with strength 10. 04 repositories; this will probably be drop-in compatible with ffmpeg, since their syntax always is in my experience. The --audio-tracks option tells mkvmerge to copy only the listed audio tracks to the new file. I am trying to remove audio from an mp4 file using ffmpeg but unfortunately it does not give me the "silenced" mp4 file I look for. mkv Nov 30, 2020 · If you want get just audio from a video, you can use this command: ffmpeg -i input-file-name \ -f mp3 -ab 192000 \ -vn output-audio. mp4 The -an option will completely remove the audio from a video, and since we're just copying the video codec as is, this most likely will only take seconds. Does not work . So ultimately the music is left on it. There are 2 sections of it (both about 6secs long) I want to extract (including the audio) into a single, short piece with just these 2 cute bits. 2: cut out the first 0. To remove all audio tracks but Italian: ffmpeg -i my_video. mp4 Sep 19, 2022 · -an omits the audio stream from the output file-c:v copy losslessly copy the video stream without re-encoding it. In this video I remove the audio track from a video file using FFmpeg. 🌠 FFMPEG website: https://ffmpeg. mp4 -c copy -dn -map_metadata:c -1 out. I tried multiple -map or dispositions commands with ffmpeg to remove the subtitles whithout any success. mov -i noisy_audio_reverb. Oct 6, 2022 · Im trying to cut multiple parts of audio with ffmpeg, i was able to find a working result (for video ) for a single filter : ffmpeg -i input. mkv file with two audio tracks. 0 -i in. flv ffmpeg -ss 2 -t 120 -vcodec copy -acodec copy -i input. mp4 This will replace all audio tracks in the video file v. This data can help show the language of each stream. I have seen savings up to 42% in file size. FFmpeg ffmpeg -activation_bytes <ActivationBytes> -i <Input>. To detect whether your version of ffmpeg has this filter run: ffmpeg -hide_banner -filters | grep silenceremove The output should look like: silenceremove A->A Remove silence The command to remove silent parts may look like: ffmpeg -i input. Set a custom thumbnail for the video, zoom in on a specific scene, and adjust the FPS. There are still three streams and they look identical to ffmpeg -i in. mkv -map 0:a \ -acodec copy audio. The audio stream, especially as the video resolution goes up, is very small relative to the video stream, so you probably aren't going to see a relatively large change if it was in AAC, AC3 or DTS. xyz/topics👥Memberships: https://vod. I want to remove or suppress this audio overlay. ffmpeg -i file_audio. This project packs many encoders and decoders, making it support almost any video, audio, and other multimedia files. Create a New Movie with Original Video and Newly Edited Audio ffmpeg -i noisy_audio. m4a. Dec 3, 2016 · Generally people use correct language flags however audio languages are less likely to keep the same ID. Nov 25, 2024 · FFmpeg Remove Audio Track from MKV FFmpeg is always the best choice to deal with multimedia files for people who have experience with command-line tools. See full list on json2video. Is there any way to separate background sound and speaking audio from video separately? Is it possible to mute or remove audio from only parts of video like offset between time frames? Like how to use these filters in this command ffmpeg. Another alternative to copy audio only. youtube. What I'm doing is the following: ffmpeg -i input. Edit. Apr 9, 2021 · I have hundreds of mp3 files, all random lengths. How can I remove everything but video and stereo stream with ffmpeg and get a 480p stereo sound video? Edit: Output of ffmpeg - "input. wav -c:a pcm_s16le -af "bandreject=f=900:width_type=h:w=600" out. 2s to avoid that possible hight stop recording noise in the ending of audio (remember that the audio was reversed). mp4 ffmpeg -i <input> -map 0:0 -v:c copy <output> The output returns the converted video WITH the audio still included. Inside of FFmpeg's af parameter, we can include the silenceremove filter, which we can tweak to remove total, or near silence. Nov 25, 2013 · example: remove the custom tag TXXX:UPLOADER. ). NOTE: I'm using avconv, because that's in the Ubuntu 12. i try : ffmpeg -i video. Yes! I found option: -map_metadata -1 But output is unexpected to Jan 31, 2020 · ffmpeg -i <input> -an <output>. rickmakes. mkvmerge has a lot of other options for setting titles, adding a delay to sync audio, etc, so check the manpage for details. In this post, we will see the installation process and code snippets to remove the audio from video using FFmpeg on various OS. Aug 27, 2020 · This command will output a file with name my_output_file. mp4 Sep 28, 2018 · areverse: Reverse the entire audio. strms. 1:start_threshold=0. mp4 -c copy -an input-silent. Supplying -vn -acodec copy will remove video; -an -vcodec copy will remove all audio. mkv" -map a -map -m:language:eng -map v -map s -map d? -map t -c:v copy -c:a copy "out. Jul 2, 2020 · ffmpeg -i noisy_audio. flv The thought on the second one was: perhaps if I specified a length beyond what was possible, it'd just go to the end. Choose an output format that supports your audio Nov 16, 2020 · Regarding the usual ffmpeg "copy vs re-encode" dichotomy, I was hoping to be able to use ffmpeg's "copy" "codec" (yeah, I know that it's not really a codec) so that ffmpeg would not re-encode my video, but if I specify "copy", then ffmpeg starts and stops at the nearest keyframes which are not sufficiently close to my desired start and stop Apr 6, 2020 · I am removing the audio from video files using the command (on a Mac): ffmpeg -i example. find -name '*. Modify audio file in software like Audacity. Sep 4, 2015 · Better would be to remove the audio stream altogether. ffmpeg cut and concat single command line. mp4 -c:v copy -an -movflags faststart -pix_fmt yuv420p output. Oct 1, 2016 · Thanks! Exactly what i needed. areverse: This part back the audio to original way. com/u Dec 22, 2024 · Rotate the video, remove audio from the video, only remove video (silent), or both. Example to extract audio stream #4: ffmpeg -i input. mp3 -af pan="stereo|c0=c0|c1=-1*c1" -ac 1 karaoke. Details on its use can be found in the FFmpeg Documentation under 5. Sep 6, 2014 · Documentation: FFMPEG silence remove filter. i want to keep the first audio track and all the subtitle this parameter is working but it's removing the subtitle `-map 0:0 -map 0:1 -c:v copy -c:a copy` then i tried this follow parameter but it's adding the video file twice and remove the subtitle as well Sep 9, 2021 · Part 1: How to Extract Audio from Video with FFmpeg. mp4 -map 0 -map -0:a -map 0:5 -c copy my_video. Here' Oct 19, 2021 · I need to remove all audio from a video and save the video without the audio. position must be a time duration specification, see (ffmpeg-utils)the Time duration section in the ffmpeg-utils(1) manual. atrim=start=0. aka: album cover, album art, album image. mkv -ss 50. mkv" remember stream numbering start at 0. mp3 The output is the music without vocals (not completely but fairly good). m4a -map 0:a:3 selects audio stream #4 only (ffmpeg starts counting from 0). mp3 This file contains metadata (artist, genre, etc. When I opened both my initial audio (input. Is that possible using ffmpeg? I don't know of a ffmpeg command I could have tried to get this done, so am not posting a command. Jul 9, 2021 · Learn how to use FFmpeg, an open-source software project for handling multimedia streams, to mute or remove audio from a video file. Second, using -map 0:a selects all audio streams we found before. I tried ffmpeg -i input. mp4 Dec 20, 2018 · I want to replace part of the audio in one mp4 file with part of another mp3 file using ffmpeg. You can remove audio from movie: $ ffmpeg -i example. mp3 -af silenceremove=1:0:-50dB output. Mar 15, 2018 · ffmpeg - how to remove audio from video in laravel. e. This could be used for a variety of reasons including removing audio for privacy reasons or removing audio because you don't need it. Posted by RickMakes June 29, 2020 June 30, 2020 Posted in FFmpeg Video notes: https://www. mp3 ffmpeg cannot remove the APIC tag, so use eyeD3. mkv -filter_complex '[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1[outv][outa]' -map '[outv]' -map '[outa]' out. mp4 -i birds. com/ffmpeg-remove-duplicate-frames-with-mpdecimate-while-retaining-audio/FFmpeg Installation Links: https://www. Jun 23, 2019 · How do I reduce the echo/reverb using ffmpeg or anything command line interface(for python scripting)? Note: I can upload originals if necessary I have tried altering ARSS setting, mainly the brightness, however, 2. You may use it for various purposes, including converting between different file formats. . I want to do this using any software like adobe etc or with command line like ffmpeg/sox. With FFmpeg you can remove the audio stream with the following command: ffmpeg -i input. To extract the audio from a video: ffmpeg -i "$1" -map 0 -map -0:a:2 -map -0:s:2 -map -0:s:3 -c copy "$1. Code I use is: ffmpeg_extract_au Feb 21, 2019 · I remove the vocals from music via FFMPEG. 25 is the highest I can push it without introducing static, which would be even harder to remove, on top of the echo. Aug 26, 2012 · I'm trying to convert some video file containing video, audio and subtitles streams into another format using FFMpeg. Note: FFmpeg is an open-source software project for handling video, audio and other multimedia streams. This copies the audio and does not re-encode it. Apr 15, 2020 · Although this next command isn’t exactly a filter, it’s still useful to know how to remove or mute, audio in an MP4. To remove audio but leave your subtitles and any metadata that might be there, use this option: ffmpeg -i sourcefile-c copy -an outputfile. mkv" -i "output. mp3 -c copy -map_metadata 0 -metadata UPLOADER= output. Jun 29, 2021 · ffmpeg -i in. ts -c: v libx264 -c: a aac -ac 1 -b: a 96k -af afftdn, adeclip, adeclick = b = 5, acompressor -movflags + faststart -vf yadif = 1, scale = - 2: 720 output. Video Feb 3, 2015 · ffmpeg seems to have a new option -to in the documentation:-to position (input/output) Stop writing the output or reading the input at position. This can be used to "trim" a file, the result being an audio file with possibly a shorter duration. mkv" The command will map every audio stream then remove audio with the English language flag. wav -vcodec copy -map 0:v:0 -map 1:a:0 -acodec aac noisy_audio_reverb. com/watch?v=lTbOKh_wJF0🌠 Stackoverflow: https://stackoverflow. 0. This could be used to, for instance, turn a music video into a music only file. the id3v2 tool is old and broken Jun 26, 2021 · It turns out removing the audio from a video is very easy with FFmpeg! To remove the audio from a video: ffmpeg -i video. ffmpeg -i "in. wav – Dec 3, 2020 · ffmpeg: remove cover picture from mp3/convert to ogg without cover. Mar 18, 2024 · We can see that the audio stream format is aac. Each codec introduces a different latency and I could not find a description of the precise value of this delay. mp3 Where the silenceremove parameter is explained as removing: In video there is multiple audio and subtitle. I want to remove just the first one while keeping the second one, nothing else. mp4 -c copy -an video-sansson. -c copy enables stream copy mode. ffmpeg batch command trim all mp3s in folder. exe -threads 4 -rtbufsize 2048m -f dshow -i audio="Microphone (Realtek Audio)" -f gdigrab -offset_x 1 -offset_y 1 -video_size 768x432 -probesize 4096M -i desktop -pix_fmt yuv420p -c:v libx264 -crf 28 -preset ultrafast -tune zerolatency -movflags +faststart -r 15 "test. mkv, if needed. 3. mp4 It improves the clicking issue a little but not enough. This could be used for a variety of reasons including removing audio for privacy reaso Paste the FFmpeg command into the 'function' box: ffmpeg -vcodec copy -an -movflags use_metadata_tags (no need to define the input or output, Shutter does it for you) Set the extension to . mov -vn noisy_audio. net/j/UCTHij3Ac5GizLsn5yB4IX_Q ffmpeg After a lot of playing with ffmpeg I came up with the following command line: ffmpeg -i input. Dec 10, 2024 · Part 1: How to Use FFmpeg to Remove Audio from Videos? FFMPEG is a highly flexible video editing program from the command line. mp3 -filter_complex "[0:a]atrim=end=45,a If the audio wasn't in something like TrueHD or DTS-MA, you should temper your expectations of how much removing the audio will change the size. From that point we will compare with ffmpeg documentation to better understand. The -an option drops the audio. How can i apply this command to more than one video without duplicating the command. Jun 28, 2020 · In this video I remove the audio track from a video file using FFmpeg. Then the negative maps remove those specific streams. Or maybe there's a better way of formatting the syntax. 00 -c:a aac file_new_audio. mp4, then right click the queue area and select 'copy a tree. mkv -i file_new_audio. 🎨 Artist/Thumbnail Creator: https://jawhaj. This is my ffmpeg command: xxxx and input/output are real values ffmpeg -i input -map 0: Jun 4, 2017 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand It works well, except that the audio is missing. mp4 -an example-nosound. I was using -map_metadata -1 but this doesn't work. You can check the source audio type with ffprobe file. More of Ffmpeg. ita. Now, we can specify a container format for the output audio file: $ ffmpeg -i video. Best Way to Remove Audio From Video in FFmpeg. Original Video Length - 0:05:43 Final Vidoe Length - 0:05:34. mp4 -i input. Check the following guide for gathering data using FFprobe: I want to recode a video and remove the audio. 2 using FFMPEG with silencedetect to remove audio silence. wav -ss 00:00:10. mp4` -map -0:a removes all audio tracks from input 0. mkv In my case it's mp4 files, but you know tomayto tomato. An alternative to copying just audio only: ffmpeg -i input. I wonder what is the command to make the output separated vocals (vocal only)? I mean how to save the separated vocals in an audio file? Mar 5, 2019 · i got an mp4 and i want to remove 3 minutes of sound on 4h video (to upload on youtube). aac -c copy final_mux. Jan 24, 2011 · -vn or -an will remove all the video or audio tracks. mp4 Jun 29, 2020 · Extract Audio/Remove Video ffmpeg -i train_whistle. May 7, 2023 · The audio has an overlay of some soft music in a way so that the original soundtrack and dialogues in the video are difficult to hear. Sep 7, 2022 · I use ffmpeg -i input -map 0 -map -0:a:2 -c copy output to remove audio stream from a signle video. Apr 20, 2024 · Trim audio with -ss to set start time while re-compressing audio. mp4 -an -vcodec copy output. My goal is to remove all of the audio from all of the videos and output or overwrite Nov 18, 2020 · -- We need to remove all audio from a dir full of . Feb 9, 2014 · What you're looking for is the bandreject filter I suppose:. Remove all audio streams / tracks ffmpeg -i input -map 0 -map -0:a -c copy output May 26, 2021 · Remove audio with FFMPEG To remove audio with FFMPEG, the key is the -an option with the -c copy option. art📝 Blog: https://donaldfeury. org/🌠 You may want to watch also: https://www. @source: https: Aug 16, 2016 · I have input file: infile. Feb 22, 2022 · I show you how to use FFMPEG to remove the audio tracks from a video file without reencoding or losing any quality quickly and free. You can detach audio using FFmpeg. 0 -to 15. You can use these commands together to do them all at once: Jun 25, 2012 · The easiest way to do this is to set -map_metadata to use one of the input streams, rather than using global metadata. 264; How to reduce background audio noise using arnndn (neural network models) How to add multi-line text to video using drawtext filter; How to automatically normalize audio volume; How to download m3u8 steam and save to mp4; List all supported codecs; Select specific video/audio track when converting video Feb 26, 2020 · I don't know ffmpeg at all though, so I appreciate any help putting together a command given ffmpeg's rather arcane syntax! Another nice to have over the aforementioned sox command is for it only to remove silence at the beginning and end (if it exists) -- not from the middle of the recording. mkv -c copy -an example-nosound. \ffmpeg. mp4 ffmpeg -i in. Nov 4, 2024 · Part 2. mp4 -vn -acodec copy train_whistle_audio. All answers I've found use ffmpeg, but this is not really an option for my use case. Tip: -an indicates no audio output. The option -c:an should do this job, but I receive the error: At least one output file must be specified. The original can de discarded. mp4 -c:v copy -c:a copy -map_chapters -1 out. mp4 But the length of the final video is less than the original video. Also anyone looking to find the right value to classify silence as may wish to look into normalising their input audio volume to 0dB first, to do this in ffmpeg see this answer. Aug 9, 2019 · ffmpeg is an open source command-line tool that enables us to convert audio or video formats. Following is the output generated by FFmpeg: Mar 13, 2021 · I have an audio file, that have some silences, which I am detecting with ffmpeg detectsilence and then trying to remove with removesilence, however there is some strange behavior. mp4" Nov 22, 2024 · With the help of FFmpeg remove audio from video codes, you can remove or replace audio from videos. However, for an investigation I need to correct this delay, i. It will then map all video, subtitle and The result of the statement above flags all audio streams -default and the first audio stream to default. How to convert AV1 to H. avi' -exec ffmpeg -i {} -an -vcodec copy {} \; But while it did remove the audio, it also reduced each clip down to just a few frames. eyeD3 --backup --remove-all-images input. mp4 ffmpeg seems to reencode the Nov 10, 2021 · Remove audio from a video To remove audio from a video file, i. I want to cut 10 seconds off the beginning and 10 seconds off the end of each file - without having to tell ffmpeg the duration of each file. However, ffmpeg complains about the subtitles format - it cannot decode the stream. There are several other denoising filters available, including one based on neural networks. fixed. exe -i "C:\Users\___\ Using custom FFmpeg parameters we can easily remove silence from an audio file. In my case, I added a reverb to the whole file. 6. adjust the audio after coding such that it is time aligned with the original, uncoded May 11, 2019 · I'm trying to get rid of the 1st of two audio tracks in an mp4 file. ffmpeg -i file_video. avi -vf "select='1 Jun 8, 2018 · I am on a Mac using Python 3. aac. Jul 9, 2021 · -an – remove audio stream completely. -map 0:5 inserts the 5th track from input 0, which is the Italian audio (notice NO -sign in this case). mp4 the full audio is deleted. mp4 -i a. mkv -map 0:a -acodec copy audio. I was able to replicate this with another set of files. The stream index starts counting from 0, so audio stream 10 would be 0:a:9. Nov 29, 2013 · Here is a version that will (you may need to adjust if there is more than 1 audio stream): ffmpeg -ss 10. gux ancy lhvd wzakvzdj vskje qzwyq riczt lmrsqm hnrwl tlgw