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Will3880840928ai
Participating Frequently
February 25, 2026

"apng" codec video files import corrupted into v26.0.1. Videos are playable but distorted. All files tested using .mov container. The same files work as expected with v25. Issue experienced across multiple machines.

  • February 25, 2026
  • 1 reply
  • 43 views

To test, drag an apng into a v25 timeline and the same into a v26 timeline. One will show corrupted, and the other will be fine. The apngs in question work fine in all other settings and in this instance are generated from png seqs using ffmpeg.  

    1 reply

    R
    Community Manager
    Rach McIntireCommunity Manager
    Community Manager
    February 25, 2026

    Hi ​@Will3880840928ai ,

    Thanks for submitting your bug report.  Appreciate the clear repro steps — that helps a lot.

     

    Is it always the same file/s, or is it different every time?  Because the files are generated from PNG sequences via FFmpeg and are playable, this points more toward a decoding issue than file corruption. 

     

    To narrow this down, could you share:

     

    • Full system specs (CPU, GPU, RAM, OS build)

    • GPU driver version

    • Whether hardware accelerated decoding is enabled in Preferences

    • The exact FFmpeg command used to generate the APNG .mov

    • A small sample file that reproduces the issue

     

    If you can also grab a quick screen recording showing the same file in a v25 timeline versus v26, that would help confirm whether we’re looking at a consistent regression.

     

    Sorry for the frustration, and thanks for reaching out — we really appreciate you taking the time to flag this.

    W
    Will3880840928aiAuthor
    Participating Frequently
    February 26, 2026

    Hi Rach, thanks for the quick reply.

    Yep, sorry for lack of precision, def a decoding issue not file corruption. 

    Zip attached with a couple of example workfiles(v25 file with intended output, v26 with decoding issues, and a v26 converted from a v25 file, also with decoding issues), notepad with ffmpeg command. Also source img_seq and the apng mov. Codec is noted as “png” in ffmpeg command as it automatically uses apng if you specify a movie container. 

    Hardware accelerated decoding enabled on both version, but no change when it’s disabled on either version.

    My machine is 16G, i7 14700, RTX 4060 Ti (driver version 32.0.15.8195), Windows 11 Pro
    Issue replicated across other Win11 machines of various specs, and a mac on latest OS version as of 26/02/26

    Cheers!
     

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