V1.5.6 FFmpegFrameGrabber could not grab frames: avcodec_send_packet() error -1094995529

[luunn54]

Thanks you for your working hard to release v1.5.6. I tested and found an issue:

Ver 1.5.6 (release version)

Issue: FFmpegFrameGrabber.grab could not grab frames
Test code:

        try {
            FFmpegLogCallback.set();

            FFmpegFrameGrabber g = new FFmpegFrameGrabber("t.mpg");
            g.start();

            int count_frame = 0;
            while (true) {
                Frame frame = g.grab();
                if (frame == null) {
                    break;
                }

                count_frame++;
            }

            g.stop();
            System.out.println("Number of frames: " + count_frame);
        } catch (FFmpegFrameGrabber.Exception e) {
            e.printStackTrace();
        }

Output:

Error: [mp3float @ 0x7fe47316aa00] Header missing

Warning: [mpegts @ 0x7fe471a4d400] DTS 9000 < 12600 out of order

Info: Input #0, mpegts, from 't.mpg':

Info:   Duration: 
Info: 00:00:14.05
Info: , start: 
Info: 0.086122
Info: , bitrate: 
Info: 768 kb/s
Info: 

Info:   Program 1 

Info:   Stream #0:0
Info: [0x12d]
Info: : Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, bottom first), 352x288 [SAR 12:11 DAR 4:3]
Info: , 
Info: 25 fps, 
Info: 25 tbr, 
Info: 90k tbn, 
Info: 50 tbc
Info: 

Info:     Side data:

Info:       
Info: cpb: 
Info: bitrate max/min/avg: 500000/0/0 buffer size: 147456 
Info: vbv_delay: N/A
Info: 

Info:   Stream #0:1
Info: [0x12e]
Info: : Audio: mp3 ([3][0][0][0] / 0x0003), 44100 Hz, mono, fltp, 128 kb/s
Info: 

Error: [mp3float @ 0x7fe470204200] Header missing

org.bytedeco.javacv.FFmpegFrameGrabber$Exception: avcodec_send_packet() error -1094995529: Error sending an audio packet for decoding. (For more details, make sure FFmpegLogCallback.set() has been called.)
	at org.bytedeco.javacv.FFmpegFrameGrabber.grabFrame(FFmpegFrameGrabber.java:1414)
	at org.bytedeco.javacv.FFmpegFrameGrabber.grab(FFmpegFrameGrabber.java:1280)
	at abc.Test.main(Test.java:23)
Disconnected from the target VM, address: '127.0.0.1:60978', transport: 'socket'

Process finished with exit code 0

OS: Mac and Centos

Test video:
t.mpg.zip

[saudet]

Does it work "correctly" if you ignore that error and just keep grabbing?

[luunn54]

yes, it works if I ignore that error.
I report this issue because I though you fixed it in #1673 (comment)

[saudet]

I "fixed" it for video codecs because I didn't have any failing examples for audio codecs, but it looks like we'll need to do the same for audio codecs, yes.

[luunn54]

👍 thank you

Do you plan to fix it soon? or we have to wait util the next release?

[saudet]

Already done in commit f145bf7.

[luunn54]

👍
the issue was fixed in the snapshot build: 1.5.7-20210805.084510-7. Thanks for your support

[saudet]

The fixes for these regressions have been released with JavaCV 1.5.7. Please let me know if you're still having issues with this though, and thanks to you for helping out! It's very much appreciated.