Multi-File Encoding EXTREMEMLY slow
Free all in one audio/video ffmpeg batch encoder
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I just installed version 3.0.7 this morning and ran into trouble increasing the volume when processing multiple files at the same time. I don't think it's important, but the command I used is: -map 0:0 -map 0:1 -map 0:2 -map 0:3 -c:v copy -af "volume=1.7" -c:a ac3 -metadata:s:a:0 language=eng. FYI, all 3 files use AC3 for audio.
If I load the three files and process them using the "Sequential Encoding" button, all three movies processed in about 5 or 6 minutes... about what I would normally expect. If I process them by clicking the "Multi-File Encoding" button, the estimated time for processing all three is over an hour. Nothing is different, other than the button I chose to encode. I am using the very latest version of FFmpeg (7.01 Essentials x64).
Everything was working fine before I upgraded to the latest version. Any ideas what may have happened? I'm attaching two short videos so you can see for yourself.
Sure. The log file is attached as a PDF. I was going to just paste the text below, but it was 5,688 pages long and over 20MB. Keep in mind that I aborted the process around the 4m 30s mark. According to the "Time Remaining" estimate, I would've had to wait over 3 hours for the three movies to finish encoding.
The files are on my internal HDD (not a solid-state drive). The output was the standard \FFbatch sub-folder on the same drive. I don't specifically remember using the program with FFmpeg 7.0, but I've used FFmpeg Batch AV Converter for a really long time. I'm sure that I have used it with 7.0 in the past. This is the first time I've had this issue, regardless of the FFmpeg.exe version.
Thank you! I really appreciate you helping me figure this out.
Steve
Last edit: Steven T Pippin 2024-06-19
One more thing... I thought I'd see what happened if I tried multi-file encoding with FFmpeg Batch Portable (version 3.06. I haven't updated it to 3.07). Even though it's one version behind, it is still using FFmpeg.exe v7.01. It worked perfectly. It would've processed the batch in less than 2 minutes total. If you want me to update Portable and try it again, let me know.
Last edit: Steven T Pippin 2024-06-19
Thanks for the info. Could you first try to disable verbose logs in 3.0.7, before updating portable 3.0.6?
It is really the only change that could affect performance,
Last edit: Abel 2024-06-19
Wow, that fixed it. Thank you!
Looks like new verbose logs are a drag on performance, better to use them only for debugging.
I'll set them to a lower level in the future.
Last edit: Abel 2024-06-20
Great! Again, thank you very much!
Great! Again, thank you very much!
Last edit: Steven T Pippin 2024-06-20