Avidemux Forum

Does the topic header imply that the source of the sample didn't exhibit the issue with duplicated timestamps and they were introduced by saving in copy mode with Avidemux? In this case it would be indeed indispensable to get hold of the source video file (I strongly suspect that it was originally a MPEG-TS).

I am openly curious how (presumably) fixed versions cope with real-world MPEG-TS files in your case. Have you already tried the latest nightly from https://avidemux.org/nightly/win64/?

We have a massive amount of duplicate timestamps (MKV supports only PTS, that's it) in the file. You can rescue it by saving in copy mode as AVI (acknowledge the freaky warning), then loading the resulting AVI in Avidemux, restoring correct PTS and saving it in copy mode to e.g. MP4 or MKV.

Not sure if you'll be able to see anything just from this, I can upload the source file as well.
But I just made some cuts to a video, not all on keyframes, and saved in copy mode without re-encoding.
When I play it back in my media player, the framerate stutters throughout.
https://we.tl/t-NFAXFEXVzW

Please describe what you actually want to achieve. What does "add" mean? Do you want to append or prepend a still picture video to the video contained in the MP4 file? Do the JPEG picture and the video in the MP4 file share exact the same dimensions? Does the MP4 file contain an audio track (i.e. the pre- or appended still picture part will need a matching audio track being created and muxed in)? What codec is used to compress the video in the MP4 file? What codec do you need the final result to be compressed with?

Hi, i need to add jpeg file to my mp4 file.
Any advice? Thanks!

The handling of only partially matching configuration should be now fixed for the crop filter by [1] and [2]. Other filters may need a similar treatment.

Thank you for raising the topic.

Thanks for the responses, they are appreciated.

I am splicing and appending H.264 shot on Google Pixels and processing the clips on Windows, using Avidemux 2.7.8 release.
I apply filters and the resulting footage looks fine.
However as soon as I try appending a clip that has had a filter applied, all the subsequent clips appear in green on Avidemux (and unwatchable on VLC, with random 'rainbow' artefacts).  There is no error message. The sound is normal.

The error seems to happen whatever the filter I use (eg just Fade let alone fancy filters like dropping or FPS), and whatever the processing options that I use.
I've tried recoding using different encoders and output formats, to no avail.
The x264 library ships with the installer, so no problem there it would seem.

The reason why I want to append clips that have been treated with filters is that I want to minimise recoding.
I want to join together most of the clips with no recoding... only a few scenes benefit from filters and this requires recoding.

There are no errors if instead I compile using raw footage only and then apply the filters afterwards, to the final version.  That works fine. 

However I see a drop in quality once Avidemux does the recoding  ... colours overall notably are less vivid, with a greyer, duller image.  This might be insignificant for some.  But the whole reason I prefer Avidemux is because it is lossless.

So any ideas on how I can append raw H.264 and a few other clips with filters applied ?
Thanks for any ideas.

Quote from: wokoxe2060 on July 02, 2021, 07:31:26 PMI just hoped that you could fix that issue in ffmpeg itself, because you have much more expirence in coding than me.

FFmpeg is a beast at a completely different level of complexity and sophistication.

Quote from: wokoxe2060 on July 27, 2021, 06:56:18 PM

Code Select Expand

[dash @ 000001b34a54dc80] DTS 1625 < 14400348 out of order39 bitrate=2330.8kbits/s speed=5.94x
[mpegts @ 000001b34be9ed80] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 1296031320 >= 146250
av_interleaved_write_frame(): Invalid argument

As I wrote, it would be better to sidestep FFmpeg entirely. An application just needs to concatenate MPEG-TS chunks and start a new file on timestamp reset.