"Max file size" creates incorrect sizes

[MarkJeronimus]

Describe the bug

When I set "Max file size" to 8MB, the files become 1MB. When I set it to 50MB, the files become 5.6MB. The files consistently become about 8× smaller than configured.

Settings applied
It happens both after clean install, and after playing with about every (video) setting I could find.

App Logs
My last command line for a 12s video that became 5.6MB with the "50MB" setting is:
ffmpeg -y -i <filename>.mp4 -preset medium -c:a copy -crf 23 -b:a 192k -maxrate 4074k -bufsize 4074k -vf

File used
Recorded with Samsung Camera (35s / ~80MB)), then trimmed to 12s/30MB using Google Photos app:

$ ffprobe -v quiet -print_format json -show_format -show_streams <filename>.mp4
{
    "streams": [
        {
            "index": 0,
            "codec_name": "h264",
            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
            "profile": "High",
            "codec_type": "video",
            "codec_tag_string": "avc1",
            "codec_tag": "0x31637661",
            "width": 2400,
            "height": 1080,
            "coded_width": 2400,
            "coded_height": 1080,
            "closed_captions": 0,
            "film_grain": 0,
            "has_b_frames": 0,
            "pix_fmt": "yuv420p",
            "level": 50,
            "color_range": "tv",
            "color_space": "bt709",
            "color_transfer": "bt709",
            "color_primaries": "bt709",
            "chroma_location": "left",
            "field_order": "progressive",
            "refs": 1,
            "is_avc": "true",
            "nal_length_size": "4",
            "id": "0x1",
            "r_frame_rate": "30/1",
            "avg_frame_rate": "50625/1687",
            "time_base": "1/90000",
            "start_pts": 0,
            "start_time": "0.000000",
            "duration_ts": 1160656,
            "duration": "12.896178",
            "bit_rate": "18747622",
            "bits_per_raw_sample": "8",
            "nb_frames": "387",
            "extradata_size": 35,
            "disposition": {
                "default": 1,
                "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
            },
            "tags": {
                "creation_time": "2024-10-16T13:58:17.000000Z",
                "language": "eng",
                "handler_name": "VideoHandle",
                "vendor_id": "[0][0][0][0]"
            }
        },
        {
            "index": 1,
            "codec_name": "aac",
            "codec_long_name": "AAC (Advanced Audio Coding)",
            "profile": "LC",
            "codec_type": "audio",
            "codec_tag_string": "mp4a",
            "codec_tag": "0x6134706d",
            "sample_fmt": "fltp",
            "sample_rate": "48000",
            "channels": 2,
            "channel_layout": "stereo",
            "bits_per_sample": 0,
            "id": "0x2",
            "r_frame_rate": "0/0",
            "avg_frame_rate": "0/0",
            "time_base": "1/48000",
            "start_pts": 782,
            "start_time": "0.016292",
            "duration_ts": 617462,
            "duration": "12.863792",
            "bit_rate": "256137",
            "nb_frames": "603",
            "extradata_size": 2,
            "disposition": {
                "default": 1,
                "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
            },
            "tags": {
                "creation_time": "2024-10-16T13:58:17.000000Z",
                "language": "eng",
                "handler_name": "SoundHandle",
                "vendor_id": "[0][0][0][0]"
            }
        }
    ],
    "format": {
        "filename": "20240821_170023~2.mp4",
        "nb_streams": 2,
        "nb_programs": 0,
        "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
        "format_long_name": "QuickTime / MOV",
        "start_time": "0.000000",
        "duration": "12.896200",
        "size": "30639919",
        "bit_rate": "19007099",
        "probe_score": 100,
        "tags": {
            "major_brand": "mp42",
            "minor_version": "0",
            "compatible_brands": "isommp42",
            "creation_time": "2024-08-21T15:01:00.000000Z",
            "com.android.version": "13"
        }
    }