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13th April 2005, 18:40 | #1 | Link | ||
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The 4/13 build from the same link just crashes right away when I try to mux my raw .264 file into .mp4. Quote:
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13th April 2005, 18:44 | #2 | Link | |
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13th April 2005, 19:48 | #3 | Link | ||
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@Bond - I don't know the exact rate of playback, since it jumps around and the readout only shows 2 decimal places anyway.
I noticed my latest Matrix 3 test encode started out in sync, but looked like a poorly dubbed kung fu movie by the end. So I did a mp4box -info readout on the video track of the screwy file: Quote:
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The chapters work perfectly in Showtime, but using the same filters, they don't quite work right in WMP6.4. In WMP6.4, the first chapter doesn't show up in the list. I forget now whether files created in Recode do the same thing. |
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15th April 2005, 22:06 | #4 | Link |
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The 4/15 build of mp4box doesn't crash when muxing from raw like the 4/13. It still exhibits the framerate issue when muxing from raw, just like the 4/10 build. JoeBG, you might want to check on the multiple audio track issue to see if it's fixed.
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15th April 2005, 22:20 | #5 | Link | |
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have a look for a description here
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16th April 2005, 00:22 | #6 | Link |
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@ bond - That would be a viable explanation if it only happened on short clips, since the minimal number of frames would amplify whatever rounding error there is. However, the error I'm getting is on 2+ hour movies. There is no question to me that it's an importing problem (not just a calculation problem for the -info readout), because it very noticeably affects a/v sync on long movies, and it only started happening with the builds sometime between April 5 and 10. Unfortunately, this is also the time when the -chap option was added, so I can't get a build that has both chapter functionality and working fps.
Need more evidence? Add a 2-hour raw .264 clip to a new .mp4 using CD's 4/5 build. Then add the same raw clip to a second new .mp4 using the 4/15 build. Run mp4box -info on the video track of both MP4s (using either mp4box build) and note the ~1/3 second difference in the calculated duration. Both will have a little bit of rounding error, but the .mp4 from 4/15 will also have the major import error. Still need more evidence? Mux in some audio using the two builds, and note the gradual loss of sync with the 4/15 build. It's a reproducable phenomena for me. If anyone else can reproduce it, I'll send a bug report to Jean. |
16th April 2005, 09:05 | #7 | Link | |
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Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ | AVC/H.264 FAQ | AAC FAQ | MP4 FAQ | MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora | Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free |
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16th April 2005, 14:05 | #8 | Link |
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splitted as this doesnt belong to the chapters discussion
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Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ | AVC/H.264 FAQ | AAC FAQ | MP4 FAQ | MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora | Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free |
18th April 2005, 09:44 | #9 | Link |
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There really seems to be a problem ...
I used a small XviD clip: -if imported from the avi no problems (avi->mp4->avi always 23.976 fps) -if converted to raw first ("-aviraw video filename.avi") and muxed with "-fps 23.976" resultet mp4 shows 23.976 fps (mp4UI), but extracting to avi produces 23.975 fps (extracting with mp4UI on the other hand seems to be fine) Last but not least - when importing from AVI 23.976 fps should be shown as such and not as 23.98 fps - IMHO |
18th April 2005, 10:43 | #10 | Link |
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i already pointed to the bug tracker of mp4box/gpac in this thread, if you think there is a bug make a bug report there
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Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ | AVC/H.264 FAQ | AAC FAQ | MP4 FAQ | MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora | Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free |
19th April 2005, 01:08 | #12 | Link |
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I submitted a bug report.
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19th April 2005, 10:16 | #13 | Link |
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and jeanlf meant this is fixed already in latest cvs
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Between the weak and the strong one it is the freedom which oppresses and the law that liberates (Jean Jacques Rousseau) I know, that I know nothing (Socrates) MPEG-4 ASP FAQ | AVC/H.264 FAQ | AAC FAQ | MP4 FAQ | MP4Menu stores DVD Menus in MP4 (guide) Ogg Theora | Ogg Vorbis use WM9 today and get Micro$oft controlling the A/V market tomorrow for free |
3rd November 2005, 22:43 | #15 | Link |
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This problem just started popping up for me in cvs (updated today, 11/3/2005) on a gentoo amd64 box. It doesn't happen if I use the GPAC 4.0 version on windows. Unfortunately gpac 4.0 doesn't compile on amd64 in linux or I would just use that.
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