ffmpegx occasionally creates 0kb files instead of encoding properly

[digitalgeist]

(I noticed I originally posted this in the wrong forum, so after deleting the original post, I'm reposting my query here)

I've run into this problem with a few versions of ffmpegx and given up on them before, but I just thought I'd ask here for the record:

Occasionally (and less often with 0.0.9x) when I'm converting .AVI or .VOB files to something else (it doesn't seem to matter which format), ffmpegx cops out and creates a file that is 0kb immediately at the start of encoding. Is there a fix for this? Am I just missing something that would fix this problem?

I don't think it would be my setup, as this has happened with different versions of the app on different computers (both intel and ppc).

Thanks for any help problem-solving!

[Case]

The Log may hold clues to why a conversion failed. You may access the Log by clicking the blue "i" in the ffmpegX Progress window.
Based on any error found in there, fellow users may be able to suggest a fix.

[digitalgeist]

Ah, ok - I was unaware of this function. I'll try it again and post what I come up with. Thanks a lot for your help!

[fernblatt]

I have a similar problem, but the progress window indicates it's been converted. Now I know where to look. With me it happens nearly *every* time I convert to a .mov file.


Thanks

[Case]

the progress window indicates it's been converted.

But what does the Log ("Process Information" window) say?

[evl]

the progress window indicates it's been converted.

But what does the Log ("Process Information" window) say?

I have the same problem, and what it says is the following:

"Encoding started on Tue Oct 23 16:20:43 CEST 2007
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
libavutil version: 49.0.0
libavcodec version: 51.9.0
libavformat version: 50.4.0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x4701fc]negative ctts, ignoring
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Users/danieldaboczy/Desktop/Fargfabriken.tv/Playing the Building.mov':
Duration: 00:09:47.3, start: 0.000000, bitrate: 24422 kb/s
Stream #0.0(eng): Audio: pcm_s16be, 48000 Hz, stereo, 1536 kb/s
Stream #0.1(eng), 25.00 fps(r): Video: h264, yuv420p, 720x576
Codec type mismatch for mapping #0.0 -> #0.0"

The thing is that I could encode without probelm before....And now it just doesn't work.
please help me

[Case]

Your source file has the audio stream (#0.0) mapped before the video stream (#0.1). This is reverse from what the ffmpeg engine expects. You may fix this "Codec type mismatch for mapping"-error by indicating that the streams are reversed. To do so, check the "Invert mapping" checkbox in the audio tab.

[dpayette]

Thanks for the answer - totally fixed my problem.

[kyokoy]

I also have creating zeroK file problem when trying to convert mov file to flv.

Here is the log. Any suggestion will be appreceiated.

FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
libavutil version: 49.0.0
libavcodec version: 51.9.0
libavformat version: 50.4.0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x5597b8]negative ctts, ignoring
Tue Jul 28 18:20:12 EDT 2009
that stream 1 comes from film source: 2997.00 (2997/1) -> 29.97 (30000/1001)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/Volumes/LaCie160-2/STABIAE/DemoOUTPUT/Stabiae_Demo99.mov':
Duration: 00:10:58.3, start: 0.000000, bitrate: 1261 kb/s
Stream #0.0(eng): Audio: aac, 48000 Hz, stereo
Stream #0.1(eng), 29.97 fps(r): Video: h264, yuv420p, 640x480
Codec type mismatch for mapping #0.0 -> #0.0

[Ai Haibara]

Have you tried the solution Case mentioned, above?

Your source file has the audio stream (#0.0) mapped before the video stream (#0.1). This is reverse from what the ffmpeg engine expects. You may fix this "Codec type mismatch for mapping"-error by indicating that the streams are reversed. To do so, check the "Invert mapping" checkbox in the audio tab.

[roover]

I have a similar problem when i try to convert an avi file (+subs in .srt format) to dvdffmpeg preset: the progress window indicates it's been converted and the only file created is a .mpv file with okb.

here's my log:

Encoding started on Sun Dec 27 17:32:43 BRST 2009
movtoy4m
Copyright 2002-2006 Johan Lindström
All rights reserved..
Input #0, yuv4mpegpipe, from 'pipe:':
Duration: N/A, bitrate: N/A
Stream #0.0: Video: rawvideo, yuv420p, 720x480, 23.98 fps
Output #0, rawvideo, to '/Users/renato/Desktop/VD_s1_e1.avi.ff.mpv':
Stream #0.0: Video: mpeg2video, 720x480, 23.98 fps, q=2-20, 4000 kb/s
Stream mapping:
Stream #0.0 -> #0.0
[mpeg2video @ 0x381324]qpel not supported by codec
Error while opening codec for stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height


Thanks

[Case]

avi + srt to dvd ffmpeg

[mpeg2video @ 0x381324]qpel not supported by codec
Error while opening codec for stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height

Try turning off Quarter pixel ME (qpel) in the Options tab. Qpel is not supported in MPEG-2 video.

dvd ffmpeg preset
Output ... 23.98 fps

A DVD with a framerate of 23.976 fps (aka NTSC FILM) should have a so-called "3:2 pulldown" flag set. The DVD ffmpeg preset does not automatically add this pulldown. You would have to manually add the pulldown to the .mpv video stream before muxing and authoring, using the Pull tool in ffmpegX. Possible, but not so easy.

Perhaps it is easier to use the DVD mpeg2enc preset, which does allow adding a 3:2 pulldown during conversion, by checking "Set 3:2" in the Options tab.

[roover]

Case wrote:
Try turning off Quarter pixel ME (qpel) in the Options tab. Qpel is not supported in MPEG-2 video.

Yeah! the conversion its running ok now!
Thanks Case!