Avidemux Forum

FOUND IT - For unknown reasons there was in HW Accel ticked "Decode video using DXVA2 (windows)". After removing the tick it worked perfectly.
I do not remember changing this settings, but it was obviously changed by me for reasons that I also do not remember. Thank you for all the checks and sorry for wasting of your time.

To make sure tested with 241214 encoding finished now and got the same slideshow. Seems like error is on my side, but can not find it.

What I'm doing wrong? I believe to have the latest version installed (250526_b008a4d7098-fflibs 7.0.2-VC++).
Have tried multiple times also with other versions 281 - release, 241212_ce994de41a6) and always getting the same result.
Same py file, tried multiple times, in fact now before posting again to make sure it was not my mistake to use 'old' version.
Was comparing the resulting files and see that 250526 has resulting audio bitrate 76.7 kb/s and file size is 176878038, 241212 has resulting audio bitrate 42.3 kb/s and file size 166012900, version from @Geo_log has 40.6 kb/s and file size 165250253. But I do not believe this is the reason. There is no other difference.

Any ideas what I should try more?

Cannot reproduce the issue with the current git master either.

Quote from: IcePlanet on June 15, 2025, 10:38:22 AMsecond is complete packet that encodes to slideshow

Here is the result of your script executed on Avidemux 2.8.2 (241214_-fflibs 7.0.2-VC++).

From recent update Avidemux was working perfectly for me, but now I have some 'strange' TS files (recorded by satelite receiver) where after encoding slideshow is present instead of video. When I cut out 1min section it encodes correctly and all is OK.

Attached are 3 media info files:
1. Original TS
2. Resulting MKV slideshow

Also I uploaded 2 packages to wetransfer, one is the small one min file that encodes correctly, second is complete packet that encodes to slideshow.

Please let me know if I'm doing something wrong, or how to change the parameters. The encoding process finished correctly.

Quote from: zeroconf on June 09, 2025, 02:47:26 AMas soon as trying to open *.mkv video made by OBS Studio

Does it mean that the crash is specific to videos generated by OBS? Or just any video (not just H.264, but e.g. AV1 as well)?

If it is the former, please provide such a file as a sample, e.g. via Mega, Dropbox, Google Drive, WeTransfer (requires an account since recently, unfortunately) or an equivalent service if none of the above are viable for you.

If it is the latter, does disabling libavcodec multi-threading in Avidemux Preferences have any effect?

Is compiling a debug build of Avidemux from source locally doable for you?

Third-party builds are obviously unsupported. I don't think the issue has anything to do with Qt stuff.

Dutch translation files added, you should be good to go, forking the repo, creating a branch where you do the necessary changes to avidemux_nl.ts (but always only within <translation></translation> tags, anything else is taboo), then creating pull requests from that branch.

Please prefer splitting your work in multiple stages rather than throwing everything in a single gigantic pull request which nobody can review in a reasonable way.

Thank you!

Current latest stable 2.8.1 does not work at all under Arch-based EndeavourOS (XFCE), shortly EOS. To be honest, this issue lasts already long time, some years already. Used AppImage file but as soon as trying to open *.mkv video made by OBS Studio, avidemux_2.8.1.appImage will freeze and only option is to kill with SIGKILL (9) the Avidemux process.
Although having QT6 installed and other QT6 apps are working fine.
Then tried avidemux_2.8.1_legacy.appImage (seems using QT5) - this at least worked but supported only OSS audio devices, which EOS does not have. At least that legacy version could open and convert video, although did not play any audio due to not supporting nowadays Linux sound servers.
IMHO as EOS is based Arch Linux, it has very latest software and would not consider this as legacy system.
Tried also install Avidemux 2.8.1 via Arch official repository, via Flatpak - still same issue persists.
Tried also avidemuxLinux_GLIBC_2.36_amd64_250530_0709.app but same issue as with 2.8.1 QT6 version. This file seems the latest available dev version.
Here is CLI output of that file:
02:41:27-471 [metaToFile::finishIndexFile] Index written, 7076061 bytes.
[MKV] Found 115190 frames in 1374 clusters
02:41:27-471 [mkvHeader::open] Track 0 has an index size of 115190 entries
02:41:27-471 [mkvHeader::open] Track 1 has an index size of 215978 entries
02:41:27-471 [mkvHeader::ComputeDeltaAndCheckBFrames] PTS is not monotonous, there are bframe
02:41:27-472 [mkvHeader::ComputeDeltaAndCheckBFrames] >>> MinDelta=40000 MaxDelta=200000
02:41:27-472 [getStdFrameRate] Best match is 1
02:41:27-472 [mkvHeader::ComputeDeltaAndCheckBFrames] Num=1000 Den=25000 zero=0 first=0
02:41:27-479 [mkvHeader::ComputeDeltaAndCheckBFrames] Checking deviation for native 1000 25000
02:41:27-481 [mkvDeviation::computeDeviation] Den=25000 Num=1000  sum of error=0, multiple=0
02:41:27-481 [mkvDeviation::computeDeviation] MinDelta=40000 maxDelta=40000 skipped=0
02:41:27-481 [mkvHeader::ComputeDeltaAndCheckBFrames] Checking deviation for minDelta 40000 1000000
02:41:27-482 [mkvDeviation::computeDeviation] Den=1000000 Num=40000  sum of error=0, multiple=0
02:41:27-482 [mkvDeviation::computeDeviation] MinDelta=40000 maxDelta=40000 skipped=0
02:41:27-482 [mkvHeader::ComputeDeltaAndCheckBFrames] Deviation        = 0
02:41:27-482 [mkvHeader::ComputeDeltaAndCheckBFrames] DeviationMinDelta = 0
02:41:27-482 [mkvHeader::ComputeDeltaAndCheckBFrames] Deviation skip    = 0
02:41:27-482 [mkvHeader::ComputeDeltaAndCheckBFrames] MinDelta=40000, defaultFrameDuation=40000
02:41:27-482 [mkvHeader::ComputeDeltaAndCheckBFrames] Checking deviation for stdFrameRate=1000:25000
02:41:27-483 [mkvDeviation::computeDeviation] Den=25000 Num=1000  sum of error=0, multiple=0
02:41:27-483 [mkvDeviation::computeDeviation] MinDelta=40000 maxDelta=40000 skipped=0
02:41:27-483 [mkvHeader::ComputeDeltaAndCheckBFrames] Deviation for stdFrameRate(1) =0
02:41:27-483 [mkvHeader::ComputeDeltaAndCheckBFrames] Std frame rate is equal or better
02:41:27-483 [mkvHeader::ComputeDeltaAndCheckBFrames] Old default duration    40000 us
02:41:27-483 [mkvHeader::ComputeDeltaAndCheckBFrames] We are within margin, recomputing timestamp with exact value (1000 vs 25000)
02:41:27-483 [mkvHeader::enforceFixedFrameRate] Num=1000 Den=25000 half=19999 zero=0 first=0
02:41:27-485 [mkvHeader::ComputeDeltaAndCheckBFrames] Enforcing constant frame rate.
02:41:27-485 [mkvHeader::ComputeDeltaAndCheckBFrames] New default duration    40000 us
02:41:27-485 [mkvHeader::ComputeDeltaAndCheckBFrames] First frame pts     0 us
02:41:27-486 [mkvHeader::open] Have to delay by 80000 us detected for frame 3 so that PTS>DTS
[MKV] Video track duration: 01:16:47,680 (4607680 ms)
[MKV]Matroska successfully read
02:41:27-487 [ADM_PP::ADM_PP] Initializing postproc
02:41:27-487 [ADM_PP::cleanup] Deleting post proc
02:41:27-487 [ADM_PP::update] updating post proc
02:41:27-487 [ADM_PP::update] Disabled
02:41:27-487 [ADM_Composer::addFile] Clearing video filters
02:41:27-487 [ADM_vf_clearFilters] clear filters
02:41:27-487 [ADM_ad_searchCodec] [ADM_ad_plugin]Format 0xff : probing libADM_ad_Mad.so score 0
02:41:27-487 [ADM_ad_searchCodec] [ADM_ad_plugin]Format 0xff : probing libADM_ad_a52.so score 0
02:41:27-487 [ADM_ad_searchCodec] [ADM_ad_plugin]Format 0xff : probing libADM_ad_alaw.so score 0
02:41:27-487 [ADM_ad_searchCodec] [ADM_ad_plugin]Format 0xff : probing libADM_ad_ima_adpcm.so score 0
02:41:27-487 [ADM_ad_searchCodec] [ADM_ad_plugin]Format 0xff : probing libADM_ad_lav.so score 150
02:41:27-487 [ADM_ad_searchCodec] [ADM_ad_plugin]Format 0xff : probing libADM_ad_ms_adpcm.so score 0
02:41:27-487 [ADM_ad_searchCodec] [ADM_ad_plugin]Format 0xff : probing libADM_ad_opus.so score 0
02:41:27-487 [ADM_ad_searchCodec] [ADM_ad_plugin]Format 0xff : probing libADM_ad_ulaw.so score 0
02:41:27-487 [ADM_ad_searchCodec] [ADM_ad_plugin]Format 0xff : probing libADM_ad_vorbis.so score 0
02:41:27-487 [ADM_AudiocoderLavcodec::ADM_AudiocoderLavcodec]  [ADM_AD_LAV] Using decoder for type 0xff
02:41:27-487 [ADM_AudiocoderLavcodec::ADM_AudiocoderLavcodec]  [ADM_AD_LAV] #of channels 2
02:41:27-487 [ADM_AudiocoderLavcodec::ADM_AudiocoderLavcodec] [ADM_AD_LAV] Using 2 bytes of extra header data, 2 channels

 0000 : ..                 11 90
02:41:27-499 [ADM_AudiocoderLavcodec::ADM_AudiocoderLavcodec] Decoder created using float planar...
02:41:27-499 [ADM_AudiocoderLavcodec::ADM_AudiocoderLavcodec] [ADM_ad_lav] init successful (blockalign 1), channels=2
02:41:27-516 [ADM_edAudioTrackFromVideo::ADM_edAudioTrackFromVideo] Creating edAudio from video track 0 at c542d9f0
[ADM_EditorSegment::addReferenceVideo] Video FCC: AVC1 (31435641)
[ADM_EditorSegment::addReferenceVideo] The video codec has some extradata (49 bytes)

 0000 : .d.(....gd.(..@x   01 64 00 28 ff e1 00 1e 67 64 00 28 ac d9 40 78
 0010 : .'..Z........ ..   02 27 e5 c0 5a 80 80 80 a0 00 00 03 00 20 00 00
 0020 : .Q..2....h......   06 51 e3 06 32 c0 01 00 04 68 ef 8f cb fd f8 f8
 0030 : .                  00
02:41:27-516 [ADM_getDecoder] Searching decoder in plugins
02:41:27-516 [tryCreatingVideoDecoder] No decoder found in plugin
02:41:27-516 [ADM_getDecoder] Searching decoder in coreVideoCodec(1920 x 1080, extradataSize:49)...
02:41:27-516 [ADM_coreCodecGetDecoder] Searching decoder in coreVideoCodec(1920 x 1080, extradataSize:49)...
[lavc] Build: 3998564
[lavc] Enabling MT decoder with 8 threads
02:41:27-516 [decoderFFH264::decoderFFH264] Initializing H264 decoder with 49 bytes of extradata
02:41:27-523 [decoderFF::lavSetupFinish] H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 video decoder for AVC1 initialized with 8 thread(s)
02:41:27-523 [EditorCache::EditorCache] Video cache instance created at 0x55a9c52387c0
02:41:27-523 [EditorCache::createBuffers] Added 16 video cache buffers, 16 total.
02:41:27-523 [ADM_EditorSegment::addReferenceVideo] Original frame increment 00:00:00,040 = 40000 us
02:41:27-527 [ADM_EditorSegment::addReferenceVideo] min increment 00:00:00,040 = 40000 us for frame 2
02:41:27-527 [ADM_EditorSegment::addReferenceVideo] max increment 00:00:00,040 = 40000 us for frame 2
02:41:27-527 [ADM_EditorSegment::addReferenceVideo] About 40000 microseconds per frame, 115190 frames
02:41:27-527 [ADM_EditorSegment::addReferenceVideo] The first frame DTS = 0 ms
02:41:27-527 [ADM_EditorSegment::addReferenceVideo] The first frame has a PTS > 0, adjusting to 80 ms
02:41:27-527 [ADM_EditorSegment::updateStartTime] Setting DTS start in ref to 00:00:00,000
02:41:27-527 [ADM_EditorSegment::updateStartTime] New total duration = 01:16:47,600
02:41:27-527 [ADM_verifyDts] Verifying DTS....
02:41:27-527 [ADM_verifyDts] Checking from 1 to 115190
02:41:27-532 [ADM_verifyDts] Pass 2..
02:41:27-533 [ADM_verifyDts] DTS verified
[Editor] B- frame possible with that codec
02:41:27-533 [ADM_Composer::addFile] [Editor] This is H264, check if we can fill missing PTS
02:41:27-535 [ADM_setH264MissingPts] We have 0 missing PTS
02:41:27-535 [ADM_Composer::addFile] AVC1 sometimes has invalid timestamps which confuse avidemux, checking
02:41:27-535 [ADM_Composer::seektoTime] Seeking to a keyframe at 00:00:00,080
02:41:27-535 [ADM_Composer::seektoTime] Seeking to frame 0 at 00:00:00,080
02:41:27-535 [ADM_Composer::DecodePictureUpToIntra] Decoding up to intra frame 0, ref: 0
[edCache] Flush
02:41:27-536 [ADM_FFgetFormat] Multithreading enabled, skipping hw accel lookup.
02:41:27-600 [ADM_Composer::goToTimeVideo] Seek done, decoded to 80000 us in ref (00:00:00,000 linear) with segment start at 80000 us
02:41:27-600 [ADM_Composer::checkForValidPts] Checking file for broken PTS...
02:41:27-600 [ADM_Composer::checkForValidPts] Checking 100 frames out of 115190.
02:41:27-833 [ADM_Composer::seektoTime] Seeking to a keyframe at 00:00:00,080
02:41:27-833 [ADM_Composer::seektoTime] Seeking to frame 0 at 00:00:00,080
02:41:27-833 [ADM_Composer::DecodePictureUpToIntra] Decoding up to intra frame 0, ref: 0
[edCache] Flush
02:41:27-838 [ADM_FFgetFormat] Multithreading enabled, skipping hw accel lookup.
02:41:27-866 [ADM_Composer::goToTimeVideo] Seek done, decoded to 80000 us in ref (00:00:00,000 linear) with segment start at 80000 us
02:41:27-867 [ADM_Composer::checkForValidPts] -------- Stats :----------
02:41:27-867 [ADM_Composer::checkForValidPts] nbBFrames:75
02:41:27-867 [ADM_Composer::checkForValidPts] nbPFrames:25
02:41:27-867 [ADM_Composer::checkForValidPts] nbIFrames:0
02:41:27-867 [ADM_Composer::checkForValidPts] nbNoImage:0
02:41:27-867 [ADM_Composer::checkForValidPts] nbPtsgoingBack:0
02:41:27-867 [ADM_Composer::checkForValidPts] -------- /Stats ----------
02:41:27-867 [ADM_Composer::seektoTime] Seeking to a keyframe at 00:00:00,080
02:41:27-867 [ADM_Composer::seektoTime] Seeking to frame 0 at 00:00:00,080
02:41:27-867 [ADM_Composer::DecodePictureUpToIntra] Decoding up to intra frame 0, ref: 0
[edCache] Flush
02:41:27-873 [ADM_FFgetFormat] Multithreading enabled, skipping hw accel lookup.
02:41:27-911 [ADM_Composer::goToTimeVideo] Seek done, decoded to 80000 us in ref (00:00:00,000 linear) with segment start at 80000 us
02:41:27-911 [ADM_Composer::checkForDoubledFps] Checking for doubled FPS.., time increment ceiling = 72000
02:41:27-920 [ADM_Composer::checkForDoubledFps] Checking DTS...
02:41:27-920 [checkTiming]    Good : 0
02:41:27-920 [checkTiming]    Bad  : 115189
02:41:27-921 [ADM_Composer::checkForDoubledFps] Checking sorted PTS...
02:41:27-921 [checkTiming]    Good : 0
02:41:27-921 [checkTiming]    Bad  : 115189
02:41:27-921 [ADM_Composer::checkForDoubledFps] Cannot halve fps
02:41:27-921 [admPreview::destroy] Destroying preview
02:41:27-921 [renderDisplayResize] Render to 1920x1080 zoom=0,5296, old one =0 x 0, zoom=1,0000, renderer=(nil)
02:41:27-921 [admDetectQtEngine] Running on platform xcb
02:41:27-921 [spawnLinuxRenderer] trying VDPAU
02:41:27-921 [vdpauRender::init] [Vdpau]Init
02:41:27-921 [vdpauRender::init] [VDpau] Allocating surfaces 1920 x1080 , 1920 x 1080, 2860 x x1609
02:41:27-949 [admVdpau::mixerCreate] Creating vdpauMixer with width=1920, height=1080 color=0
02:41:27-949 [admVdpau::mixerCreate] Vdpau Mixer : Enabling 0 features
02:41:27-949 [spawnLinuxRenderer] VDPAU init ok
02:41:27-949 [vdpauRender::changeZoom] [vdpauRender] Changing zoom.
02:41:27-983 [UI_resize] Resizing the main window to 1221x795 px
02:41:28-008 [vdpauRender::refresh] [Vdpau]Rrefresh
02:41:28-067 [vdpauRender::refresh] [Vdpau]Rrefresh
[RDR] Resizing to 1016 x 572
02:41:28-067 [renderCompleteRedrawRequest] RedrawRequest
02:41:28-070 [A_ResetMarkers] Video Total duration : 01:16:47,600 ms
02:41:28-070 [ADM_Composer::setMarkerBPts] Selection's end point set to 01:16:47,600 (4607600000 us)
02:41:28-073 [ADM_Composer::rewind] Rewinding
02:41:28-073 [ADM_Composer::switchToSegment] Trying to switch to seg 0 with startTime in reference pic= 80 ms
02:41:28-073 [ADM_Composer::seektoTime] Seeking to a keyframe at 00:00:00,080
02:41:28-073 [ADM_Composer::seektoTime] Seeking to frame 0 at 00:00:00,080
02:41:28-073 [ADM_Composer::DecodePictureUpToIntra] Decoding up to intra frame 0, ref: 0
[edCache] Flush
02:41:28-074 [ADM_FFgetFormat] Multithreading enabled, skipping hw accel lookup.
02:41:28-108 [ADM_Composer::switchToSegment] Switched ok to segment 0 (dontdecode=0)
02:41:28-108 [admPreview::start] admPreview,starting
02:41:28-110 [updateLoaded]  conf updated
[AudioEncoder] Selected copy for index 0, tag 0x0
02:42:20-417 [HandleAction] ************ Scale **************
02:42:20-420 [HandleAction_Navigate] Scale :102
02:42:20-420 [HandleAction_Navigate] Scale Time:47002 ms (total=4607600 ms)
02:42:20-420 [HandleAction_Navigate] Scale Time:00:00:47,002 ms
02:42:20-420 [ADM_Composer::getFrameNumFromPtsOrBefore] Best candidate for time 00:00:47,082 in reference is frame 1176
02:42:20-420 [HandleAction_Navigate] Seeking to  Time:00:00:40,000 ms
02:42:20-420 [ADM_Composer::DecodePictureUpToIntra] Decoding up to intra frame 1000, ref: 0
[edCache] Flush
02:42:20-420 [ADM_FFgetFormat] Multithreading enabled, skipping hw accel lookup.
02:42:20-484 [HandleAction] ************ Scale **************
02:42:20-494 [HandleAction] ************ Scale **************
02:42:20-494 [HandleAction_Navigate] Scale :193
02:42:20-494 [HandleAction_Navigate] Scale Time:88931 ms (total=4607600 ms)
02:42:20-494 [HandleAction_Navigate] Scale Time:00:01:28,931 ms
02:42:20-494 [ADM_Composer::getFrameNumFromPtsOrBefore] Best candidate for time 00:01:29,011 in reference is frame 2220
02:42:20-494 [HandleAction_Navigate] Seeking to  Time:00:01:24,440 ms
02:42:20-494 [ADM_Composer::DecodePictureUpToIntra] Decoding up to intra frame 2111, ref: 0
[edCache] Flush
02:42:20-495 [ADM_FFgetFormat] Multithreading enabled, skipping hw accel lookup.
/tmp/.mount_avidempqolZZ/AppRun: line 77:  6410 Killed                  "${HERE}/usr/bin/avidemux3_qt6" "${args

• }"

Thank you.

I will not be actively following Avidemux development and keep translations up to date, but it's no big deal to update the translation a few times a year.