Fail to make iphone video proxy

zmintzoltan · October 19, 2025, 8:02am

What is your operating system?
Linux Mint 22.1

What is your Shotcut version (see Help > About Shotcut)?
Shotcut version 25.08.16

Can you repeat the problem? If so, what are the steps?
I select a video shot from iPhone 16 Pro Max in my Timeline, go to properties, ask to create a proxy and then it fails…
the hardware encoder is turned off.
I have no idea what’s wrong…
thanks in advance for your help

View log:

ffmpeg version n7.1.1-2-g68b5db2464 Copyright (c) 2000-2025 the FFmpeg developers
built with gcc 14.3.0 (GCC)
configuration: --prefix=/app --enable-rpath --enable-gpl --enable-version3 --disable-static --enable-shared --disable-doc --disable-alsa --enable-libfontconfig --enable-libfreetype --enable-libopus --enable-libpulse --enable-librsvg --enable-libvpx --enable-libdav1d --enable-libsvtav1 --enable-libxml2 --enable-libx264 --enable-libx265 --enable-libmp3lame --enable-libtheora --enable-libvmaf --enable-libvorbis --enable-libwebp --enable-libaom --enable-libzimg --disable-decoder=libaom_av1 --enable-nvenc --enable-vaapi
libavutil 59. 39.100 / 59. 39.100
libavcodec 61. 19.101 / 61. 19.101
libavformat 61. 7.100 / 61. 7.100
libavdevice 61. 3.100 / 61. 3.100
libavfilter 10. 4.100 / 10. 4.100
libswscale 8. 3.100 / 8. 3.100
libswresample 5. 3.100 / 5. 3.100
libpostproc 58. 3.100 / 58. 3.100
[h264 @ 0x5ada1e994600] Reinit context to 3840x2160, pix_fmt: yuv420p
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5ada1e9900c0] Could not find codec parameters for stream 1 (Audio: none (apac / 0x63617061), 48000 Hz, 4 channels, 387 kb/s): unknown codec
Consider increasing the value for the ‘analyzeduration’ (0) and ‘probesize’ (5000000) options
[aist#0:1/none @ 0x5ada1e9bb0c0] Guessed Channel Layout: 4.0
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from ‘/mnt/Data/OnRoad/Nyers/Részletek/01 kezdés/Kezdés.MOV’:
Metadata:
major_brand : qt
minor_version : 0
compatible_brands: qt
creation_time : 2025-10-18T08:13:06.000000Z
com.apple.quicktime.location.accuracy.horizontal: 10.695599
com.apple.quicktime.full-frame-rate-playback-intent: 0
com.apple.quicktime.location.ISO6709: +45.9890+018.6699+093.988/
com.apple.quicktime.make: Apple
com.apple.quicktime.model: iPhone 16 Pro Max
com.apple.quicktime.software: 26.0.1
com.apple.quicktime.creationdate: 2025-10-17T16:25:36+0200
Duration: 00:00:30.57, start: 0.000000, bitrate: 26138 kb/s
Stream #0:00x1: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 193 kb/s (default)
Metadata:
creation_time : 2025-10-18T08:13:06.000000Z
handler_name : Core Media Audio
vendor_id : [0][0][0][0]
Stream #0:10x2: Audio: none (apac / 0x63617061), 48000 Hz, 4.0, 387 kb/s
Metadata:
creation_time : 2025-10-18T08:13:06.000000Z
handler_name : Core Media Audio
vendor_id : [0][0][0][0]
Stream #0:20x3: Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(tv, bt709, progressive, left), 3840x2160, 25423 kb/s, 30 fps, 30 tbr, 600 tbn (default)
Metadata:
creation_time : 2025-10-18T08:13:06.000000Z
handler_name : Core Media Video
vendor_id : [0][0][0][0]
encoder : H.264
Stream #0:30x4: Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time : 2025-10-18T08:13:06.000000Z
handler_name : Core Media Metadata
Stream #0:40x5: Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time : 2025-10-18T08:13:06.000000Z
handler_name : Core Media Metadata
Stream #0:50x6: Data: none (mebx / 0x7862656D), 23 kb/s (default)
Metadata:
creation_time : 2025-10-18T08:13:06.000000Z
handler_name : Core Media Metadata
Stream #0:60x7: Data: none (mebx / 0x7862656D), 99 kb/s (default)
Metadata:
creation_time : 2025-10-18T08:13:06.000000Z
handler_name : Core Media Metadata
Stream #0:70x8: Data: none (mebx / 0x7862656D), 0 kb/s (default)
Metadata:
creation_time : 2025-10-18T08:13:06.000000Z
handler_name : Core Media Metadata
[out#0/mp4 @ 0x5ada1ed2b900] Adding streams from explicit maps…
[aost#0:0/ac3 @ 0x5ada1e9bb4c0] Created audio stream from input stream 0:0
[aost#0:1/ac3 @ 0x5ada1ea0c380] Created audio stream from input stream 0:1
[aist#0:1/none @ 0x5ada1e9bb0c0] Decoding requested, but no decoder found for: none
Error opening output file /mnt/Data/OnRoad/CFMoto/cfmoto/proxies/53f74bc06f2fde3c5fd609623fe274e9.pending.mp4.
Error opening output files: Invalid argument
[AVIOContext @ 0x5ada1e998900] Statistics: 8184880 bytes read, 111 seeks
Failed with exit code 234

Austin · October 19, 2025, 1:09pm

Looks like a file system problem, not an iPhone video problem. Does this path exist, and the user account have permission to write to it?

zmintzoltan · October 19, 2025, 2:11pm

Yes, I can. I think there is error:

mov,mp4,m4a,3gp,3g2,mj2 @ 0x5ada1e9900c0] Nem találhatói kodekparaméter az 1. adatfolyamhoz (Audio: nincs (apac /0x63617061), 48000 Hz, 4 csatorna, 387 kb/s): ismeretlen kodek

shotcut · October 19, 2025, 4:31pm

I am surprised it is happening again for you.
I will try to release to retest it, but I might forget since I’m out of town. Meanwhile it had an explanation and workaround for future recordings.

zmintzoltan · October 20, 2025, 6:54am

This is the first time I’ve had this error. What you linked to occurred on Mac OS, I’m using Linux Mint. One solution previously was to set the iPhone to record only stereo sound. The problem with me is that I already have the recordings and I didn’t record them.

I found an ffmpeg solution for pre-conversion. But it would be more convenient if ShotCut could do this too.

This code:

ffmpeg -analyzeduration 200M -probesize 200M -i input.mov -map 0:v:0 -map 0:a:0 -c:v copy -c:a copy output.mp4