ah si scusa, mi sono dimenticato di postarlo.

non è vuoto, ma ha molte meno info di un altro video:
codice:
{
    "streams": [
        {
            "index": 0,
            "codec_name": "mpeg4",
            "codec_long_name": "MPEG-4 part 2",
            "codec_type": "video",
            "codec_tag_string": "DIVX",
            "codec_tag": "0x58564944",
            "width": 720,
            "height": 288,
            "coded_width": 720,
            "coded_height": 288,
            "closed_captions": 0,
            "film_grain": 0,
            "has_b_frames": 1,
            "pix_fmt": "yuv420p",
            "level": -99,
            "chroma_location": "left",
            "refs": 1,
            "quarter_sample": "false",
            "divx_packed": "false",
            "r_frame_rate": "20/1",
            "avg_frame_rate": "20/1",
            "time_base": "1/20",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 108346,
            "duration": "5417.300000",
            "bit_rate": "919913",
            "nb_frames": "108346",
            "extradata_size": 19,
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0,
                "captions": 0,
                "descriptions": 0,
                "metadata": 0,
                "dependent": 0,
                "still_image": 0
            }
        },
        {
            "index": 1,
            "codec_name": "mp3",
            "codec_long_name": "MP3 (MPEG audio layer 3)",
            "codec_type": "audio",
            "codec_tag_string": "U[0][0][0]",
            "codec_tag": "0x0055",
            "sample_fmt": "fltp",
            "sample_rate": "48000",
            "channels": 2,
            "channel_layout": "stereo",
            "bits_per_sample": 0,
            "r_frame_rate": "0/0",
            "avg_frame_rate": "0/0",
            "time_base": "1/16000",
            "start_pts": 0,
            "start_time": "0.000000",
            "bit_rate": "128000",
            "nb_frames": "225716",
            "extradata_size": 12,
            "disposition": {
                "default": 0,
                "dub": 0,
                "original": 0,
                "comment": 0,
                "lyrics": 0,
                "karaoke": 0,
                "forced": 0,
                "hearing_impaired": 0,
                "visual_impaired": 0,
                "clean_effects": 0,
                "attached_pic": 0,
                "timed_thumbnails": 0,
                "captions": 0,
                "descriptions": 0,
                "metadata": 0,
                "dependent": 0,
                "still_image": 0
            }
        }
    ],
    "chapters": [

    ],
    "format": {
        "filename": "/run/media/fermat/DATI/Film/Disney/Anastasia.avi",
        "nb_streams": 2,
        "nb_programs": 0,
        "format_name": "avi",
        "format_long_name": "AVI (Audio Video Interleaved)",
        "start_time": "0.000000",
        "duration": "5417.300000",
        "size": "717785950",
        "bit_rate": "1059990",
        "probe_score": 100
    }
}
invece un video che non da problemi: https://pastebin.com/AFwR3Zhi