Only one of several videos is loaded successfully

[kapkap98]

Hello,
I am having troubles with loading several videos for an experiment with a nested timeline. All video paths actually exist and can be played manually but only "Abbiegen09.mp4" is loaded in the experiment while the other videos fail to load. (Also, if "Abbiegen09.mp4" is presented first, only a frame of the video is shown). The ImageSliderResponse-part is always displayed correctly. The video size is between 15mb-20mb. Here is the snippet that contains the problem. I hope anyone can solve my video-problems.

Thank you

timeline=[];

const jsPsych = initJsPsych();


var video = ['Abbiegen07.mp4','Abbiegen08.mp4','Abbiegen09.mp4', 'Ausparken07.mp4','Ausparken08.mp4','Ausparken09.mp4','Kreuzung07.mp4','Kreuzung08.mp4','Kreuzung09.mp4','LeerlaufAbbiegen.mp4','LeerlaufAusparken.mp4','LeerlaufKreuzung.mp4' ];

var preload = {
    type: jsPsychPreload,
    video: video,
    max_load_time: 60000,
    show_progress_bar:true,
    continue_after_error:true
};

timeline.push(preload);



var face_name_procedure = {
    timeline: [

        {
            type: jsPsychVideoButtonResponse,
            stimulus: jsPsych.timelineVariable('video'),  
            choices: ["jsPsych.NO_KEYS"]

        },
        {
            type: jsPsychImageSliderResponse,
            stimulus: 'criticality.png',
            labels: ['1','2','3','4','5','6','7','8','9','10'],
            prompt: "<p>Bewerten Sie die Situation anhander der Kritikalitätsskala: Die Situation war..</p>",
        },
    ],
    timeline_variables: [
 { video: ["Abbiegen07.mp4"],scene: "turn", criticality:7},
 { video: ["Abbiegen08.mp4"],scene: "turn", criticality:8},
 { video: ["Abbiegen09.mp4"],scene: "turn", criticality:9},
 { video: ["Kreuzung07.mp4"],scene: "cross", criticality:7},
 { video: ["Kreuzung08.mp4"],scene: "cross", criticality:8},
 { video: ["Kreuzung09.mp4"],scene: "cross", criticality:9},
 { video: ["Ausparken07.mp4"],scene: "parking", criticality:7},
 { video: ["Ausparken08.mp4"],scene: "parking", criticality:8},
 { video: ["Ausparken09.mp4"],scene: "parking", criticality:9},
 { video: ["LeerlaufAbbiegen.mp4"],scene: "turn", criticality:0},
 { video: ["LeerlaufAusparken.mp4"],scene: "parking", criticality:0},
 { video: ["LeerlaufKreuzung.mp4"],scene: "cross", criticality:0},
    ],
    randomize_order:true
}


    timeline.push(face_name_procedure);



    
    jsPsych.run(timeline);

[kapkap98]

The problem was that the not-presentable videos had the codec MPEG-H Part2/H265 . After a conversion to H264 everything works.

[becky-gilbert]

Thanks for the update! Glad you were able to figure out the problem.