According to this comment by glenn-slayden, an mp4 format with highest video quality is obtained as follows:. Notice that, in the first term, the ext filter is specified for the audio but not the video , a technique which I didn't see mentioned in the discussion above.
If that seems backwards for my stated goals, that might be because, considering that we're trying to ensure that the video format is mp4 , why is the constraint given for the audio? The key is that each fallback term separated by the slashes will fail if any part of its requirement fails, moving on to the next term.
But what if you care more about getting a mp4 container than you do about the audio quality? By insisting on m4a audio first--but then relenting on just that part while issuing bestvideo again-- by using the the format selection above you essentially express a flexible preference for mp4 over the other containers; you surely do want mp4 if possible, but not at the cost of reduced video quality.
As I said, you may still get some mkv , but they will be greatly reduced in number and only used when required to supply a supposedly better video. In the latter case, adding --merge-output-format mp4 will convert to mp4 if required. So the full command is:.
I am not sure if that's proper to do, only that it works, and gives an mp4 file with both highest quality audio and video for the mp4 format. So the video and audio streams look identical, but a different muxer if I'm using that term correctly has been used to put them together the final file. Sign up to join this community. The best answers are voted up and rise to the top.
Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Download only format mp4 on youtube-dl Ask Question. C file open in Microsoft Visual Studio Code 1.
Common C Filenames main. File Viewer Plus. Microsoft Visual Studio Microsoft Visual Studio Code. The method can also be set through the option "download.
The mode with which to write the file. Useful values are "w" , "wb" binary , "a" append and "ab". Not used for methods "wget" and "curl". An invisible integer code, 0 for success and non-zero for failure.
For the "wget" and "curl" methods this is the status code returned by the external program. The "internal" method can return 1 , but will in most cases throw an error. What happens to the destination file s in the case of error depends on the method and R version. Currently the "internal" , "wininet" and "libcurl" methods will remove the file if there the URL is unavailable except when mode specifies appending when the file should be unchanged.
Proxies can be specified via environment variables. These environment variables must be set before the download code is first used: they cannot be altered later by calling Sys. Edit the URL and the -ss , -t times to use this command.
It creates the arguments, using both video and audio URLs, similar to this answer by godofgrunts. This is basically the same as doing the postprocessing with ffmpeg yourself after downloading the file first. This feature request is not yet implemented in youtube-dl. See issue and many duplicates of it on github.
The postprocessor needs to be ffmpeg installed. PS: youtube-dl will download the entire media before processing it, and remove it after.
This doesn't completely answer OP's question but there is way to download a stream from beginning to a specific duration without having to download the complete stream. Since YouTube provides resume support, we could request for partial content using the Range header. Now send a head request to the first URL which links to the video stream to fetch the total content length of this stream:.
Now, we divide this total content length by total seconds in video the YouTube video has a duration of 4 min and 7 secs which is seconds. This should only download the first 10 secs. The downloaded file should be able to play but best let FFmpeg fix the incorrect metadata:. We can also download only the initial part of the audio 2nd-URL in a similar fashion content-length would differ but total seconds would remain same. Downloading any middle portion from the video should also be possible in this way but is going probably way much trickier because YouTube places the metadata at the beginning of the stream in the first few bytes and without it being present in the downloaded media, the stream won't play at all.
It won't work for other websites. You can download from the start up to a point without downloading the whole thing and editing. That's half of what this question asks:. I don't think it willl work for some formats. You can now combine the options of youtube-dl. Note: on HLS videos such as on Twitch, you will also need to add --hls-prefer-ffmpeg for this to work. I made a script implementing godofgrunts answer here. I also uploaded it to Gitlab 's snippets.
You can find it here. This will download a video from slightly differences can arise because of keyframes. It can also download whole videos, just omit the time interval in that case. To add on to hyperpallium answer: OP did not mention the video he was downloading had to be from YouTube. With youtube-dl version The MKV file I ended up with was "" in "total duration", but it ended after 34 seconds.
Full cmd. Optional: rename the [file]. This could cause your arguments to be applied more than once resulting in unexpected behaviours, such as cutting your video shorter than it should. I would make a comment to the original answers but I don't have enough reputation for that. The goal is that there is only one post process for --postprocessor-args in the command line, so that it is only applied once.
For example, my config file specifies the --ffmpeg-location , --audio-format , and --audio-quality. So that in the command line, I would only use -x. Of course, this would work with any post process in the command line, so long as there is only one, and that the rest is hidden in the config file.
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