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Downloading feature for Bilibili is not working properly in terms of sequential videos #7878

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opened 2026-02-21 04:09:30 -05:00 by deekerman · 6 comments

deekerman commented

2026-02-21 04:09:30 -05:00

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Originally created by @starkshaw on GitHub (Jun 1, 2016).

Make sure you are using the latest version: run `youtube-dl --version` and ensure your version is 2016.06.02. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

I've verified and I assure that I'm running youtube-dl 2016.06.02

Before submitting an issue make sure you have:

At least skimmed through README and most notably FAQ and BUGS sections
Searched the bugtracker for similar issues including closed ones

What is the purpose of your issue?

Bug report (encountered problems with youtube-dl)
Site support request (request for adding support for a new site)
Feature request (request for a new functionality)
Question
Other

The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

$ youtube-dl -v http://www.bilibili.com/video/av4808130/
[debug] System config: []
[debug] User config: [u'-f', u'bestvideo+bestaudio/best']
[debug] Command-line args: [u'-v', u'http://www.bilibili.com/video/av4808130/']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2016.06.02
[debug] Python version 2.7.10 - Darwin-15.5.0-x86_64-i386-64bit
[debug] exe versions: avconv 11.4, avprobe 11.4, ffmpeg 3.0.2, ffprobe 3.0.2
[debug] Proxy map: {}
[BiliBili] 4808130: Downloading webpage
[BiliBili] 7802182: Downloading video info page
[download] Downloading playlist: 【长篇】哆啦A梦443【钉铛】
[BiliBili] playlist 【长篇】哆啦A梦443【钉铛】: Collected 4 video ids (downloading 4 of them)
[download] Downloading video 1 of 4
[debug] Invoking downloader on u'http://ws.acgvideo.com/b/35/7802182-1.flv?wsTime=1464819935&wsSecret2=46d27ce17d9c45ed34c501f1f9bd20e3&oi=1445658136&appkey=86385cdc024c0f6c&or=1167325994'
[download] Destination: 【长篇】哆啦A梦443【钉铛】-7802182.flv
[download] 100% of 46.71MiB in 00:37
[download] Downloading video 2 of 4
[debug] Invoking downloader on u'http://ws.acgvideo.com/b/35/7802182-2.flv?wsTime=1464819935&wsSecret2=a5caf416c7f8c9267f7e5a94068afdfe&oi=1445658136&appkey=86385cdc024c0f6c&or=1167325994'
[download] 【长篇】哆啦A梦443【钉铛】-7802182.flv has already been downloaded
[download] 100% of 46.71MiB
[download] Downloading video 3 of 4
[debug] Invoking downloader on u'http://ws.acgvideo.com/b/35/7802182-3.flv?wsTime=1464819935&wsSecret2=6adbdee4f951614edc56800a8ca1566e&oi=1445658136&appkey=86385cdc024c0f6c&or=1167325994'
[download] 【长篇】哆啦A梦443【钉铛】-7802182.flv has already been downloaded
[download] 100% of 46.71MiB
[download] Downloading video 4 of 4
[debug] Invoking downloader on u'http://ws.acgvideo.com/b/35/7802182-4.flv?wsTime=1464819935&wsSecret2=f1ea44300218d2ae35bc0bbe2ff6e4ae&oi=1445658136&appkey=86385cdc024c0f6c&or=1167325994'
[download] 【长篇】哆啦A梦443【钉铛】-7802182.flv has already been downloaded
[download] 100% of 46.71MiB
[download] Finished downloading playlist: 【长篇】哆啦A梦443【钉铛】
<end of log>

Description of your issue, suggested solution and other information

The URL of that video has multiple pieces, which is common in Bilibili, the early versions of youtube-dl downloaded these pieces and merge automatically, while the recent versions download these pieces without merge, but after the fix on last version, the file names are not carrying part_x suffix thus after first piece been successfully downloaded, the following ones cannot be downloaded since this naming issue.
Suggest that add the part_x back or even better, add auto merge back since I need to write a bash to use ffmpeg anyway.

Originally created by @starkshaw on GitHub (Jun 1, 2016). ### Make sure you are using the _latest_ version: run `youtube-dl --version` and ensure your version is _2016.06.02_. If it's not read [this FAQ entry](https://github.com/rg3/youtube-dl/blob/master/README.md#how-do-i-update-youtube-dl) and update. Issues with outdated version will be rejected. - [x] I've **verified** and **I assure** that I'm running youtube-dl **2016.06.02** ### Before submitting an _issue_ make sure you have: - [x] At least skimmed through [README](https://github.com/rg3/youtube-dl/blob/master/README.md) and **most notably** [FAQ](https://github.com/rg3/youtube-dl#faq) and [BUGS](https://github.com/rg3/youtube-dl#bugs) sections - [x] [Searched](https://github.com/rg3/youtube-dl/search?type=Issues) the bugtracker for similar issues including closed ones ### What is the purpose of your _issue_? - [x] Bug report (encountered problems with youtube-dl) - [x] Site support request (request for adding support for a new site) - [ ] Feature request (request for a new functionality) - [ ] Question - [ ] Other --- ### The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your _issue_ --- ### If the purpose of this _issue_ is a _bug report_, _site support request_ or you are not completely sure provide the full verbose output as follows: Add `-v` flag to **your command line** you run youtube-dl with, copy the **whole** output and insert it here. It should look similar to one below (replace it with **your** log inserted between triple ```): ``` $ youtube-dl -v http://www.bilibili.com/video/av4808130/ [debug] System config: [] [debug] User config: [u'-f', u'bestvideo+bestaudio/best'] [debug] Command-line args: [u'-v', u'http://www.bilibili.com/video/av4808130/'] [debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8 [debug] youtube-dl version 2016.06.02 [debug] Python version 2.7.10 - Darwin-15.5.0-x86_64-i386-64bit [debug] exe versions: avconv 11.4, avprobe 11.4, ffmpeg 3.0.2, ffprobe 3.0.2 [debug] Proxy map: {} [BiliBili] 4808130: Downloading webpage [BiliBili] 7802182: Downloading video info page [download] Downloading playlist: 【长篇】哆啦A梦443【钉铛】 [BiliBili] playlist 【长篇】哆啦A梦443【钉铛】: Collected 4 video ids (downloading 4 of them) [download] Downloading video 1 of 4 [debug] Invoking downloader on u'http://ws.acgvideo.com/b/35/7802182-1.flv?wsTime=1464819935&wsSecret2=46d27ce17d9c45ed34c501f1f9bd20e3&oi=1445658136&appkey=86385cdc024c0f6c&or=1167325994' [download] Destination: 【长篇】哆啦A梦443【钉铛】-7802182.flv [download] 100% of 46.71MiB in 00:37 [download] Downloading video 2 of 4 [debug] Invoking downloader on u'http://ws.acgvideo.com/b/35/7802182-2.flv?wsTime=1464819935&wsSecret2=a5caf416c7f8c9267f7e5a94068afdfe&oi=1445658136&appkey=86385cdc024c0f6c&or=1167325994' [download] 【长篇】哆啦A梦443【钉铛】-7802182.flv has already been downloaded [download] 100% of 46.71MiB [download] Downloading video 3 of 4 [debug] Invoking downloader on u'http://ws.acgvideo.com/b/35/7802182-3.flv?wsTime=1464819935&wsSecret2=6adbdee4f951614edc56800a8ca1566e&oi=1445658136&appkey=86385cdc024c0f6c&or=1167325994' [download] 【长篇】哆啦A梦443【钉铛】-7802182.flv has already been downloaded [download] 100% of 46.71MiB [download] Downloading video 4 of 4 [debug] Invoking downloader on u'http://ws.acgvideo.com/b/35/7802182-4.flv?wsTime=1464819935&wsSecret2=f1ea44300218d2ae35bc0bbe2ff6e4ae&oi=1445658136&appkey=86385cdc024c0f6c&or=1167325994' [download] 【长篇】哆啦A梦443【钉铛】-7802182.flv has already been downloaded [download] 100% of 46.71MiB [download] Finished downloading playlist: 【长篇】哆啦A梦443【钉铛】 <end of log> ``` --- ### Description of your _issue_, suggested solution and other information The URL of that video has multiple pieces, which is common in Bilibili, the early versions of `youtube-dl` downloaded these pieces and merge automatically, while the recent versions download these pieces without merge, but after the fix on last version, the file names are not carrying `part_x` suffix thus after first piece been successfully downloaded, the following ones cannot be downloaded since this naming issue. Suggest that add the `part_x` back or even better, add auto merge back since I need to write a `bash` to use `ffmpeg` anyway.

deekerman closed this issue

2026-02-21 04:09:33 -05:00

deekerman commented

2026-02-21 04:09:34 -05:00

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Owner

@yan12125 commented on GitHub (Jun 2, 2016):

AFAIK auto merging in youtube-dl is never implemented. Which version are you using and how did you enable it?

@yan12125 commented on GitHub (Jun 2, 2016): AFAIK auto merging in youtube-dl is never implemented. Which version are you using and how did you enable it?

deekerman commented

2026-02-21 04:09:34 -05:00

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Owner

@yan12125 commented on GitHub (Jun 2, 2016):

_partX suffixes will be added back in the next version. Sorry for my previous mistake.

@yan12125 commented on GitHub (Jun 2, 2016): `_partX` suffixes will be added back in the next version. Sorry for my previous mistake.

deekerman commented

2026-02-21 04:09:34 -05:00

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Owner

@starkshaw commented on GitHub (Jun 2, 2016):

@yan12125 I don't know the auto merging you've mentioned. But Bilibili download feature did merge all clips together. Probably version in last year, and I reported this when I found out:
https://github.com/rg3/youtube-dl/issues/8314

Like if I download best quality for YouTube it'll merge audio and video into a single mkv file rather than audio track and video track alone. For Bilibili it also should merge clips into a single file.

@starkshaw commented on GitHub (Jun 2, 2016): @yan12125 I don't know the auto merging you've mentioned. But Bilibili download feature did merge all clips together. Probably version in last year, and I reported this when I found out: https://github.com/rg3/youtube-dl/issues/8314 Like if I download best quality for YouTube it'll merge audio and video into a single mkv file rather than audio track and video track alone. For Bilibili it also should merge clips into a single file.

deekerman commented

2026-02-21 04:09:34 -05:00

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Owner

@yan12125 commented on GitHub (Jun 2, 2016):

From the description at #8314, I guess in BiliBili, videos were originally served as single files, and some day they decided to convert them to multi-part files. Handling multi-part videos correctly is much harder than merging video- and audio-only files, like the case in YouTube. There are lots of pull requests aim to implement it (#2844, #2723, #995, etc.), but none of them is good enough to get merged.

@yan12125 commented on GitHub (Jun 2, 2016): From the description at #8314, I guess in BiliBili, videos were originally served as single files, and some day they decided to convert them to multi-part files. Handling multi-part videos correctly is much harder than merging video- and audio-only files, like the case in YouTube. There are lots of pull requests aim to implement it (#2844, #2723, #995, etc.), but none of them is good enough to get merged.

deekerman commented

2026-02-21 04:09:34 -05:00

Author

Owner

@starkshaw commented on GitHub (Jun 2, 2016):

@yan12125 Hi, actually it was split into several files as well, if my memory is correct, it downloaded several files and merge at the end.
Since the old version has _partX suffixes, I have a bash for that, and if you can implement it into your code make it auto-merge, that'll be some great contribution to me and probably someone else. 😄

Here's what I have before:

printf "ffconcat version 1.0\n" > videolist.txt
for i in {1..4}
do
    printf "file '%s'\n" "【长篇】哆啦A梦442【梦蓝】-7668669_part$i.flv" >> videolist.txt
done
ffmpeg -f concat -safe 0 -i videolist.txt -c copy "【长篇】哆啦A梦442【梦蓝】-7668669.flv"
rm videolist.txt

Using ffmpeg concat feature.
So far, I used it for Bilibili, and for this gist https://gist.github.com/starkshaw/ec3cba780100bbb4050d 😏 before. But the code above is for newer ffmpeg version.

@starkshaw commented on GitHub (Jun 2, 2016): @yan12125 Hi, actually it was split into several files as well, if my memory is correct, it downloaded several files and merge at the end. Since the old version has `_partX` suffixes, I have a `bash` for that, and if you can implement it into your code make it auto-merge, that'll be some great contribution to me and probably someone else. 😄 Here's what I have before: ``` printf "ffconcat version 1.0\n" > videolist.txt for i in {1..4} do printf "file '%s'\n" "【长篇】哆啦A梦442【梦蓝】-7668669_part$i.flv" >> videolist.txt done ffmpeg -f concat -safe 0 -i videolist.txt -c copy "【长篇】哆啦A梦442【梦蓝】-7668669.flv" rm videolist.txt ``` Using `ffmpeg` concat feature. So far, I used it for Bilibili, and for this gist https://gist.github.com/starkshaw/ec3cba780100bbb4050d 😏 before. But the code above is for newer `ffmpeg` version.

deekerman commented

2026-02-21 04:09:34 -05:00

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@yan12125 commented on GitHub (Jun 2, 2016):

Dunno. Maybe you were using a fork but not rg3's version.

@yan12125 commented on GitHub (Jun 2, 2016): Dunno. Maybe you were using a fork but not rg3's version.

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Downloading feature for Bilibili is not working properly in terms of sequential videos #7878

Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2016.06.02. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

Before submitting an issue make sure you have:

What is the purpose of your issue?

The following sections concretize particular purposed issues, you can erase any section (the contents between triple ---) not applicable to your issue

If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Description of your issue, suggested solution and other information

Make sure you are using the latest version: run `youtube-dl --version` and ensure your version is 2016.06.02. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.