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  • Including Youtube-dl in FFMPEG not working in Bash (OSX)

    14 juillet 2019, par user1029296

    I am trying to download 5 second samples for a list of youtube video. The traditional approach is to download the entire file with "youtube-dl" and then use "ffmpeg" to split it however you want it.

    I am trying to use the following method : https://github.com/ytdl-org/youtube-dl/issues/622#issuecomment-162337869

    It does work when I include the variables in the command, for example :

    ffmpeg -ss 0 -i $(youtube-dl -f best --get-url https://www.youtube.com/watch?v=ySVi-0RS5vI&t=5s) -t 10 -c:v copy -c:a copy title2.mp4

    However, I am having issues trying to automate the system. Specifically, I would like ffmpeg and youtube-dl to read a file and use the values. I created the file "youtube.txt" which includes the following codes :

    440.8,https://www.youtube.com/watch?v=0-4wOE_DNeA,661.2,881.6,0-4wOE_DNeA
    
330,https://www.youtube.com/watch?v=0-AMWW6tHzw,495,660,0-AMWW6tHzw
    
509.2,https://www.youtube.com/watch?v=0-Rmto2rgMw,763.8,1018.4,0-Rmto2rgMw
    
427.6,https://www.youtube.com/watch?v=0-U53qm45cA,641.4,855.2,0-U53qm45cA
    
320.4,https://www.youtube.com/watch?v=0-dja9Ys4Sg,480.6,640.8,0-dja9Ys4Sg
    
343.6,https://www.youtube.com/watch?v=0-g_PulsqtM,515.4,687.2,0-g_PulsqtM
    
415.6,https://www.youtube.com/watch?v=0-nniRyn7dU,623.4,831.2,0-nniRyn7dU
    
431.2,https://www.youtube.com/watch?v=006BQU3BFxw,646.8,862.4,006BQU3BFxw

    I am using the following command :

    parallel -j 6 --colsep ',' ffmpeg -ss {1} -i $(youtube-dl -f best --get-url {2}) --t 5 -c:v copy -c:a copy {5} :::: youtube.txt

    However, I get the following errors :

    ERROR: '{2}' is not a valid URL. Set --default-search "ytsearch" (or run  youtube-dl "ytsearch:{2}" ) to search YouTube
    
--t: No such file or directory

    Would you mind helping me ?

    Thanks !

  • Combining Youtube-dl and FFMPEG not working

    13 juillet 2019, par user1029296

    I am trying to download 5 second samples for a list of youtube video. The traditional approach is to download the entire file with "youtube-dl" and then use "ffmpeg" to split it however you want it.

    I am trying to use the following method : https://github.com/ytdl-org/youtube-dl/issues/622#issuecomment-162337869

    It does work when I include the variables in the command, for example :

    ffmpeg -ss 0 -i $(youtube-dl -f best --get-url https://www.youtube.com/watch?v=ySVi-0RS5vI&t=5s) -t 10 -c:v copy -c:a copy title2.mp4

    However, I am having issues trying to automate the system. Specifically, I would like ffmpeg and youtube-dl to read a file and use the values. I created the file "youtube.txt" which includes the following codes :

    440.8,https://www.youtube.com/watch?v=0-4wOE_DNeA,661.2,881.6,0-4wOE_DNeA
    
330,https://www.youtube.com/watch?v=0-AMWW6tHzw,495,660,0-AMWW6tHzw
    
509.2,https://www.youtube.com/watch?v=0-Rmto2rgMw,763.8,1018.4,0-Rmto2rgMw
    
427.6,https://www.youtube.com/watch?v=0-U53qm45cA,641.4,855.2,0-U53qm45cA
    
320.4,https://www.youtube.com/watch?v=0-dja9Ys4Sg,480.6,640.8,0-dja9Ys4Sg
    
343.6,https://www.youtube.com/watch?v=0-g_PulsqtM,515.4,687.2,0-g_PulsqtM
    
415.6,https://www.youtube.com/watch?v=0-nniRyn7dU,623.4,831.2,0-nniRyn7dU
    
431.2,https://www.youtube.com/watch?v=006BQU3BFxw,646.8,862.4,006BQU3BFxw

    I am using the following command :

    parallel -j 6 --colsep ',' ffmpeg -ss {1} -i $(youtube-dl -f best --get-url {2}) --t 5 -c:v copy -c:a copy {5} :::: youtube.txt

    However, I get the following errors :

    ERROR: '{2}' is not a valid URL. Set --default-search "ytsearch" (or run  youtube-dl "ytsearch:{2}" ) to search YouTube
    
--t: No such file or directory

    Would you mind helping me ?

    Thanks !

  • Why FFmpeg print SAR instead of PAR ?

    16 août 2023, par Nelson Tatius

    If my knowledge is correct, SAR (Storage Aspect Ratio) is the ratio of pixel dimensions.
For example, a 640 × 480 video has a SAR of 640/480 = 4:3.

    



    Whereas PAR (Pixel Aspect Ratio) is ratio of pixel height and width, and most of modern videos have square PAR (1:1).

    



    But when I tried to check it with ffmpeg -i I got square SAR instead of square PAR for all test videos.

    



    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 1758 kb/s, 24.99 fps, 25 tbr, 25 tbn, 50 tbc
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 540x360  [SAR 1:1 DAR 3:2], 386 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p,  450x360 [SAR 1:1 DAR 5:4], 328 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc


    



    Is it ffmpeg bug or my mistake ?

    


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