FFmpeg process crash on Spatial Audio files

[addisonking]

i believe its a Spatial Audio issue. i tested with and without and only with, is the error thrown.

Logs:

ffmpeg version 8.1-https://www.martin-riedl.de Copyright (c) 2000-2026 the FFmpeg developers
built with Apple clang version 14.0.0 (clang-1400.0.29.102)
configuration: --prefix=/Volumes/ffmpeg_arm64/out --pkg-config-flags=--static --extra-version='https://www.martin-riedl.de' --enable-gray --enable-libxml2 --enable-gpl --enable-libfreetype --enable-fontconfig --enable-libharfbuzz --enable-libsnappy --enable-libsrt --enable-libvmaf --enable-libass --enable-libklvanc --enable-libzimg --enable-libzvbi --enable-libaom --enable-libdav1d --enable-libopenh264 --enable-libopenjpeg --enable-librav1e --enable-libsvtav1 --enable-libvpx --enable-libvvenc --enable-libwebp --enable-libx264 --enable-libx265 --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libtheora
libavutil      60. 26.100 / 60. 26.100
libavcodec     62. 28.100 / 62. 28.100
libavformat    62. 12.100 / 62. 12.100
libavdevice    62.  3.100 / 62.  3.100
libavfilter    11. 14.100 / 11. 14.100
libswscale      9.  5.100 /  9.  5.100
libswresample   6.  3.100 /  6.  3.100
[in#0/mov,mp4,m4a,3gp,3g2,mj2 @ 0x121805450] Could not find codec parameters for stream 2 (Audio: none (apac / 0x63617061), 48000 Hz, 4 channels, 384 kb/s): unknown codec
Consider increasing the value for the 'analyzeduration' (0) and 'probesize' (5000000) options
[aist#0:2/none @ 0x10fe04a70] Guessed Channel Layout: 4.0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/addis/Code/hitclip/test.mov':
Metadata:
major_brand     : qt
minor_version   : 0
compatible_brands: qt
creation_time   : 2026-05-07T15:29:28.000000Z
com.apple.quicktime.location.accuracy.horizontal: 4.748652
com.apple.quicktime.full-frame-rate-playback-intent: 0
com.apple.quicktime.location.ISO6709: +40.7398-073.7687+028.564/
com.apple.quicktime.make: Apple
com.apple.quicktime.model: iPhone 17 Pro Max
com.apple.quicktime.software: 26.5
com.apple.quicktime.creationdate: 2026-05-07T11:29:27-0400
Duration: 00:03:18.68, start: 0.000000, bitrate: 56225 kb/s
Stream #0:0[0x1](und): Video: hevc (Main 10) (hvc1 / 0x31637668), yuv420p10le(tv, bt2020nc/bt2020/arib-std-b67), 3840x2160, 55575 kb/s, 59.99 fps, 60 tbr, 600 tbn (default)
Metadata:
creation_time   : 2026-05-07T15:29:28.000000Z
handler_name    : Core Media Video
vendor_id       : [0][0][0][0]
encoder         : HEVC
Side data:
DOVI configuration record: version: 1.0, profile: 8, level: 9, rpu flag: 1, el flag: 0, bl flag: 1, compatibility id: 4, compression: 0
Ambient viewing environment: ambient_illuminance=314.000000, ambient_light_x=0.312700, ambient_light_y=0.329000
Stream #0:1[0x2](und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 161 kb/s (default)
Metadata:
creation_time   : 2026-05-07T15:29:28.000000Z
handler_name    : Core Media Audio
vendor_id       : [0][0][0][0]
Stream #0:2[0x3](und): Audio: none (apac / 0x63617061), 48000 Hz, 4.0, 384 kb/s
Metadata:
creation_time   : 2026-05-07T15:29:28.000000Z
handler_name    : Core Media Audio
vendor_id       : [0][0][0][0]
Stream #0:3[0x4](und): Data: none (mebx / 0x7862656D) (default)
Metadata:
creation_time   : 2026-05-07T15:29:28.000000Z
handler_name    : Core Media Metadata
Stream #0:4[0x5](und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time   : 2026-05-07T15:29:28.000000Z
handler_name    : Core Media Metadata
Stream #0:5[0x6](und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time   : 2026-05-07T15:29:28.000000Z
handler_name    : Core Media Metadata
Stream #0:6[0x7](und): Data: none (mebx / 0x7862656D), 71 kb/s (default)
Metadata:
creation_time   : 2026-05-07T15:29:28.000000Z
handler_name    : Core Media Metadata
Stream #0:7[0x8](und): Data: none (mebx / 0x7862656D), 5 kb/s (default)
Metadata:
creation_time   : 2026-05-07T15:29:28.000000Z
handler_name    : Core Media Metadata
Stream #0:8[0x9](und): Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time   : 2026-05-07T15:29:28.000000Z
handler_name    : Core Media Metadata
[aist#0:2/none @ 0x10fe04a70] Decoding requested, but no decoder found for: none
Error opening output file /Users/addis/Code/hitclip/test_converted.mp4.
Error opening output files: Invalid argument
[ERROR] Worker process error: Process terminated with code Some(234)

[addisonking]

solution generated using opus 4.7 and kimi k2.6

i dont want to pr this because i havent reviewed the code but just wanted to have it as a reference since it works.

summary:

1. Probe filtering (probe.rs): Audio and subtitle streams with codec_name: None or "none" are now excluded from ProbeMetadata. This prevents the wrapper from attempting to map the apac (Apple Spatial Audio) stream.
2. Probe-aware stream mapping (args.rs, upscale.rs): build_ffmpeg_args and build_upscale_encode_args now accept ProbeMetadata. When no tracks are explicitly selected, instead of wildcard mapping (-map 0:a?), the builder emits explicit -map 0:{index} for each known-valid track. This preserves all normal multi-track files while skipping unsupported streams.
3. Drop data streams (-dn): Added to all conversion paths to explicitly drop metadata/data streams (e.g., mebx) that FFmpeg cannot decode.
4. Backwards compatibility: The original function signatures remain as test-only wrappers calling the new probe-aware variants, so all 119 existing tests pass unchanged.