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  • Submit bugs and patches

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    Unfortunately a software is never perfect.
    If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
    If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
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Sur d’autres sites (8006)

  • Decoding H.264 individual nal units

    1er juin 2015, par madprogrammer2015

    I am currently sending individual NAL units across a network. These NAL units are generated by x264. Now is it possible to feed these NAL units individually into avcodec_decode_video2 ?

    Or do I have to concatenate the nal units until they represent the same frame ? If thats the case then how is that done ?

    I have also read that I might be able to receive the SPS and PPS packets. Then wait for at least one packet, and attempt to decode. Is this correct ?

    Any advice that can be offered would be greatly appreciated

  • Next drawtext clears the previous one ffmpeg

    27 août 2021, par Макс Шульдинер
    ffmpeg.exe -i ffmpeg_inputs/zheltiy_chelik.mp4  -vf "[in]drawtext=fonts/Temporarium.otf:text='r':fontcolor=orange:fontsize=100:x=(w-text_w)/2+0:y=0:enable='between(t,0, 11)', drawtext =fonts/Temporarium.otf:text = 'r':fontcolor=orange:fontsize=100:x=(w-text_w)/2+20:y=0:enable='between(t,11, 22)', drawtext =fonts/Temporarium.otf:text = 'r':fontcolor=orange:fontsize=100:x=(w-text_w)/2+40:y=0:enable='between(t,22, 33)'[out]" ffmpeg_outputs/test2.mp4 -y 


    


    There is such a ffmpeg line. Its meaning is to draw a letter 20 pixels to the right of the current position of the word every 11 seconds, and in this way "write the word". But here's the problem - when the second letter starts to render, it overwrites the first, and the third, respectively, overwrites the second. The string seems to have prescribed [in] and [out] but does not help, maybe someone has ideas

    


  • Convert video into individual frames using Python without ffmpeg ?

    22 janvier 2021, par Mridula Madhusudan

    I need to compare 2 videos to check whether they are the same.

    



    So I am planning to do the following :

    



      

    1. Split both the videos into individual frames

      2. 


    2. Compare each frame with the corresponding frame of the ref video using Python Image Lib

      3. 


    3. Count the number of different frames to decide whether they are same.

      4. 


    



    I would like to know whether there is any function in Python to help me with the first step, i.e., to split the video into individual frames. I do not want to use ffmpeg to do the splitting.

    



    Thanks in advance for the help

    


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