Make Cat-Catch compatible with --no-part commandline to download sequentially force the download to write directly to the output file=we can playback temporary unified video while downloading= avoid small fragment videos slices

[trimechee]

Hi, downloading embedded streaming videos works perfectly with Cat Catch and N_m3u8DL-RE , thanks !

the problem, my ADSL internet connection can become very weak when my mother and sisters connect to wifi, to solve this problem, I added in URL Protocol m3u8dl settings of Cat Catch this command line :

--tmp-dir "E:" --save-dir "E:"

to see and playback temporary video while downloading, the problem the temporary video is in the form of multiple small fragments videos slices impossible to play back with local media player in a seamless playback smooth playback without interruption silence between the small files videos .....

i do some research and it seems that yt-dlp which uses ffmpeg to download, yt-dlp has a special command :

--no-part

to force the download to write directly to the output file :

yt-dlp/yt-dlp#2783

yt-dlp/yt-dlp#9050

we hope please a similar command line function/option for Cat Catch to make the dream ture to be able to download sequentially force the download to write directly to the output file=we can playback temporary unified video while downloading= avoid small fragment videos slices, just like Cat Catch parser, thanks a lot !

[trimechee]

Mr @xifangczy, full of hope, I search in the command lines of N_m3u8DL-RE and I find this command line:

--live-real-time-merge

which seems to me a promising command and can perhaps remove the small fragments of video slices to have a temporary unified video in order to playback while downloading, I try to download this streaming hls video :

https://v6.voiranime.com/anime/fate-stay-night-vf/fate-stay-night-21-vf/

but same result, there are small fragments of video slices .ts while donwloading impossible to playback ,

but I notice an interesting thing about this command line: its description is:

--live-real-time-merge : 录制直播时实时合并 [default: False]

so this command line is disabled by default in Cat Catch even if we add it to URL Protocol m3u8dl settings of Cat Catch?

how to enable this command line please : --live-real-time-merge ?

https://github.com/nilaoda/N_m3u8DL-RE?tab=readme-ov-file#%E5%91%BD%E4%BB%A4%E8%A1%8C%E5%8F%82%E6%95%B0

[trimechee]

UPDATE:

I notice this: yt-dlp which has the ability to download temporary hls video in an unified manner with --no-part command line without slices small fragments videos, yt-dlp develops its own version of ffmpeg customized with some patches necessary for smooth integration with yt-dlp and the builds provided are only meant to be used with yt-dlp and any unrelated issues/patches will be rejected!

https://github.com/yt-dlp/FFmpeg-Builds

so maybe the ultimate secret to make the dream come true and save an expensive internet plan and an expensive laptop expensive cpu and to avoid videos jerk lag in the web browser of full HD videos i.e. download temporary hls video in a unified way with --no-part command line without slices small fragments videos is to develop own customized personalized ffmpeg adaptable to N_m3u8DL-RE, like yt-dlp does?

[trimechee]

Please Mr @xifangczy , just one more urgent question, how to enable correctly the commad line --live-real-time-merge of N_m3u8DL-RE in Cat-Catch settings ?

I added this command line in URL Protocol m3u8dl of Cat Catch settings but I don't see any real time merge of streaming video hls ? documentation say the default state of this command is false , we must put : --live-real-time-merge [default: True] ?

--live-real-time-merge : 录制直播时实时合并 [default: False]