Incorrect timestamps

[bviksoe]

Fixes #2271

• Adds consecutive timestamps after end of last segment as the new starting ts
• Add these timestamp to output when "print-special" enabled
• Fixes fflush usage in live reporting

I was not able to test this with the special "token_timestamps" option.

NB: This is my first Github PR so go easy on me.

[thewh1teagle]

@bviksoe

I tested this and it works.
good catch!
how did you found that problem? and how you got it fixed?

current whisper.cpp logs

cd /tmp
git clone https://github.com/ggerganov/whisper.cpp
cd whisper.cpp
wget "https://github.com/ggerganov/whisper.cpp/assets/61390950/bbf9d9c4-3d60-4693-832d-e48135edf379" -O audio.wav
cmake -B build .
cmake --build build
ffmpeg -i audio.wav -ar 16000 -ac 1 -c:a pcm_s16le normal.wav
./build/bin/main -f ./normal.wav -m "/Users/user/Library/Application Support/github.com.thewh1teagle.vibe/ggml-medium.bin"

# Result

# [00:00:00.000 --> 00:00:06.000]   I-I-I just wanna tell you how I'm feelin'
# [00:00:06.000 --> 00:00:08.700]   Gotta make you understand that
# [00:00:08.700 --> 00:00:18.080]   Never gonna give you up, never gonna let you down
# [00:00:18.080 --> 00:00:25.280]   Never gonna run around and

PR log

# Test new PR

cd /tmp
git clone https://github.com/bviksoe/whisper.cpp -b master whisper1.cpp
cd whisper1.cpp
cmake -B build .
cmake --build build
./build/bin/main -f ../whisper.cpp/normal.wav -m "/Users/user/Library/Application Support/github.com.thewh1teagle.vibe/ggml-medium.bin"

# Result

# [00:00:00.000 --> 00:00:06.000]   I-I-I just wanna tell you how I'm feelin'
# [00:00:06.000 --> 00:00:08.700]   Gotta make you understand that
# [00:00:14.080 --> 00:00:18.080]   Never gonna give you up, never gonna let you down
# [00:00:22.600 --> 00:00:25.280]   Never gonna run around and

Notice that the third timestamp is correct in the PR log.

[bviksoe]

@thewh1teagle

how did you found that problem?

If you uncomment the line

whisper.cpp/src/whisper.cpp

Line 142 in c118733

//#define WHISPER_DEBUG

you compile with extended debug trace. Then you should be able to see that the model actually produces extra timestamp tokens that this library was ignoring.

I was actually looking into why main is producing so many repetitions and hallucinations compared to similar libraries based on the same model.