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Sur d’autres sites (9926)

  • How to update this script to generate HLS video with different resolution streams ? [closed]

    1er décembre 2023, par Andy Z

    I have the following FFmpeg script :

    


    ffmpeg -i video.mp4 -i video.vtt \
 -map 0:v -map 0:a:0 -map 1 \
 -s:v:0 1080x1920 -c:v:0 h264 -b:v:0 500K \
 -c:a:0 copy -c:a:1 copy -c:a:2 copy -c:s webvtt \
 -f hls -hls_playlist_type vod -var_stream_map "v:0,a:0,s:0" \
 -master_pl_name video.m3u8 -hls_time 6 -hls_list_size 0 -hls_allow_cache 1 -start_number 1 \
 -hls_segment_filename "output/hls/%v/seg-%d.ts" output/hls/%v/index.m3u8


    


    Currently it only produces one 1080x1920 stream, how do I produce more lower resolution ones so it can adjust based on client bandwidth ?

    


    Also, I've noticed that it doesn't add the reference to the VTT file to the master HLS playlist ; I had to add this manually but is there a way to make FFmpeg do it for me ?

    


    #EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subs",NAME="English",DEFAULT=YES,AUTOSELECT=YES,FORCED=NO,LANGUAGE="en",CHARACTERISTICS="public.accessibility.transcribes-spoken-dialog",URI="0/index_vtt.m3u8"


    


    I've tried this, but I get an argument error :

    


    ffmpeg -i video.mp4 -i video.vtt \
 -map 0:v -map 0:a:0 -map 1 \
 -s:v:0 1080x1920 -c:v:0 h264 -b:v:0 500K \
 -s:v:1 720x1280 -c:v:1 h264 -b:v:1 300K \
 -s:v:2 480x854 -c:v:2 h264 -b:v:2 150K \
 -c:a:0 copy -c:a:1 copy -c:a:2 copy -c:s webvtt \
 -f hls -hls_playlist_type vod -var_stream_map "v:0,a:0,s:0 v:1,a:1 s:1 v:2,a:2 s:2" \
 -master_pl_name video.m3u8 -hls_time 6 -hls_list_size 0 -hls_allow_cache 1 -start_number 1 \
 -hls_segment_filename "output/hls/%v/seg-%d.ts" output/hls/%v/index.m3u8


    


  • yt-dlp how to download a specific video using timestamps, and limiting the download resolution ?

    30 septembre 2023, par ignacM

    I am running a python program to download a video, this is the command I use :

    


    command = ['powershell.exe ffmpeg',
                   '-ss', str(start),
                   '-i', '$(yt-dlp',
                   '-f', 'bestvideo[ext=webm]',

                   '-g', '"%s")' % (url_base + video_identifier),
                   '-t', str(end - start),
                   '-c:v', 'libx264', '-c:a', 'copy', '%s' % output_filename]

command = ' '.join(command)
output = subprocess.check_output(command, shell=True, stderr=subprocess.STDOUT)


    


    This prints something like
powershell.exe ffmpeg -ss 10 -i $(yt-dlp -f bestvideo[ext=webm] -g "https://www.youtube.com/watch?v=Z15erfLqNKo") -t 10 -c:v libx264 -c:a copy C :\Users...\video.mp4

    


    This works perfectly fine. However, I tried to download a video that had very high resolution (4K) and I want to limit the resolution when downloading. I have found that placing [height<=1080] as so should work :

    &#xA;

    powershell.exe ffmpeg -ss 10 -i $(yt-dlp -f bestvideo[ext=webm][height<=1080] -g "https://www.youtube.com/watch?v=Z15erfLqNKo") -t 10 -c:v libx264 -c:a copy C :\Users...\video.mp4

    &#xA;

    However this does not work for me and gives me the error :&#xA;Error command "" returned non-zero exit status 1.&#xA;Output : b'The system cannot find the file specified.\r\n'

    &#xA;

    I also have noticed that only limiting the resolution does not work for me either :

    &#xA;

    powershell.exe ffmpeg -ss 10 -i $(yt-dlp -f bestvideo[height<=1080] -g "https://www.youtube.com/watch?v=Z15erfLqNKo") -t 10 -c:v libx264 -c:a copy C :\Users...\video.mp4

    &#xA;

    Actually, placing [height<=1080] after bestvideo never works, no matter what I do.

    &#xA;

    What could be the problem ? Or what command can I run to achieve both tasks (limit resolution and download specific timeframe (not whole video and cutting it)) ?

    &#xA;

  • FFMPEG, MPV, SVP 4 Pro : not converting as original resolution problem, yuv420p10 -> p010 [closed]

    12 août 2023, par LeeShey

    I am using SVP4 Pro(Frame rate conversion).&#xA;The SVP 4 Pro setting :&#xA;RIFE AI engine setting&#xA;encoder commands&#xA;Transcoding 4K(3840x2160) video exports 3840x2144 resolution.&#xA;I think converting yuv420p10 -> p010 causes video height loss.

    &#xA;

    I did transcoding FHD video(just for test), but it worked lossless.&#xA;Problems to 4K, but not FHD ??

    &#xA;

    Here's the log :

    &#xA;

    19:36:05.942: ===== Starting mpv ======&#xA;19:36:05.942: Command line: C:\Program Files (x86)\SVP 4\mpv64\mpv.exe D:/Candy/prob3.mov --o=D:/Candy/prob3.SVP.VO.mov --no-audio --no-sub --no-sub-auto --input-ipc-server=mpvencodepipe --input-media-keys=no --no-msg-color --vf=lavfi=[yadif=send_frame],vapoursynth:[C:\Users\????\AppData\Roaming\SVP4\scripts\ffff.py]:4:16 --ovc=hevc_nvenc --ovcopts=preset=lossless,time_base=1000/120000,threads=16&#xA;19:36:05.982: (&#x2B;) Video --vid=1 (*) (prores 3840x2160 60.000fps)&#xA;19:36:05.982: Audio --aid=1 --alang=eng (*) (pcm_s16le 2ch 48000Hz)&#xA;19:36:06.277: vstrt: TensorRT version mismatch, built with 2135 but loaded with 2136; continue but fingers crossed...&#xA;19:36:06.856: CUDA lazy loading is not enabled. Enabling it can significantly reduce device memory usage. See `CUDA_MODULE_LOADING` in https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#env-vars&#xA;19:36:06.930: CUDA lazy loading is not enabled. Enabling it can significantly reduce device memory usage. See `CUDA_MODULE_LOADING` in https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#env-vars&#xA;19:36:07.005: CUDA lazy loading is not enabled. Enabling it can significantly reduce device memory usage. See `CUDA_MODULE_LOADING` in https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#env-vars&#xA;19:36:07.079: CUDA lazy loading is not enabled. Enabling it can significantly reduce device memory usage. See `CUDA_MODULE_LOADING` in https://docs.nvidia.com/cuda/cuda-c-programming-guide/index.html#env-vars&#xA;19:36:09.683: [autoconvert] Converting yuv420p10 -> p010&#xA;19:36:09.693: VO: [lavc] 3840x2144 p010&#xA;19:36:09.693: [vo/lavc] Opening encoder: NVIDIA NVENC hevc encoder [hevc_nvenc]&#xA;19:36:09.695: [ffmpeg] hevc_nvenc: The selected preset is deprecated. Use p1 to p7 &#x2B; -tune or fast/medium/slow.&#xA;19:36:10.130: [encode] Opening output file: D:/Candy/prob3.movprob3.SVP.VO.mov&#xA;19:36:10.131: [encode] Opening muxer: QuickTime / MOV [mov]&#xA;19:36:10.131: [ffmpeg] mov: WARNING codec timebase is very high. If duration is too long,&#xA;19:36:10.131: [ffmpeg] file may not be playable by quicktime. Specify a shorter timebase&#xA;19:36:10.131: [ffmpeg] or choose different container.&#xA;19:36:10.136: [autoconvert] Converting yuv420p10 -> p010&#xA;19:36:10.145: V: 00:00:00 / 00:00:15 (0%) {0.0min 0.0MB}&#xA;19:36:11.087: -- PAUSED --&#xA;&#xA;

    &#xA;

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